/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/clever.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 13:11:16,026 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 13:11:16,115 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 13:11:16,120 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 13:11:16,121 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 13:11:16,155 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 13:11:16,155 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 13:11:16,160 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 13:11:16,161 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 13:11:16,165 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 13:11:16,165 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 13:11:16,166 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 13:11:16,166 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 13:11:16,167 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 13:11:16,167 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 13:11:16,168 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 13:11:16,168 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 13:11:16,168 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 13:11:16,168 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 13:11:16,168 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 13:11:16,169 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 13:11:16,169 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 13:11:16,169 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 13:11:16,170 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 13:11:16,170 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 13:11:16,170 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 13:11:16,170 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 13:11:16,171 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 13:11:16,171 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 13:11:16,171 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 13:11:16,172 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 13:11:16,172 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 13:11:16,172 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 13:11:16,173 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 13:11:16,173 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 13:11:16,173 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 13:11:16,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 13:11:16,533 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 13:11:16,535 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 13:11:16,536 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 13:11:16,538 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 13:11:16,539 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/clever.wvr.c [2023-08-27 13:11:17,824 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 13:11:18,063 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 13:11:18,063 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/clever.wvr.c [2023-08-27 13:11:18,072 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c4838d15/b6b8a7118d364e6c98862f258ae60873/FLAGbec943562 [2023-08-27 13:11:18,088 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c4838d15/b6b8a7118d364e6c98862f258ae60873 [2023-08-27 13:11:18,092 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 13:11:18,094 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 13:11:18,096 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 13:11:18,097 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 13:11:18,099 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 13:11:18,101 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:11:18" (1/1) ... [2023-08-27 13:11:18,102 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68d6ce31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:11:18, skipping insertion in model container [2023-08-27 13:11:18,102 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:11:18" (1/1) ... [2023-08-27 13:11:18,123 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 13:11:18,290 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 13:11:18,307 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 13:11:18,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 13:11:18,343 INFO L206 MainTranslator]: Completed translation [2023-08-27 13:11:18,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:11:18 WrapperNode [2023-08-27 13:11:18,344 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 13:11:18,344 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 13:11:18,345 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 13:11:18,345 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 13:11:18,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:11:18" (1/1) ... [2023-08-27 13:11:18,365 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:11:18" (1/1) ... [2023-08-27 13:11:18,383 INFO L138 Inliner]: procedures = 19, calls = 22, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 87 [2023-08-27 13:11:18,384 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 13:11:18,384 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 13:11:18,385 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 13:11:18,385 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 13:11:18,391 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:11:18" (1/1) ... [2023-08-27 13:11:18,391 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:11:18" (1/1) ... [2023-08-27 13:11:18,393 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:11:18" (1/1) ... [2023-08-27 13:11:18,394 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:11:18" (1/1) ... [2023-08-27 13:11:18,397 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:11:18" (1/1) ... [2023-08-27 13:11:18,400 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:11:18" (1/1) ... [2023-08-27 13:11:18,405 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:11:18" (1/1) ... [2023-08-27 13:11:18,406 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:11:18" (1/1) ... [2023-08-27 13:11:18,408 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 13:11:18,413 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 13:11:18,413 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 13:11:18,413 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 13:11:18,414 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:11:18" (1/1) ... [2023-08-27 13:11:18,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 13:11:18,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:11:18,450 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 13:11:18,463 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 13:11:18,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 13:11:18,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 13:11:18,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 13:11:18,487 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 13:11:18,487 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 13:11:18,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 13:11:18,488 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 13:11:18,488 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 13:11:18,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 13:11:18,489 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 13:11:18,489 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 13:11:18,489 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 13:11:18,490 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 13:11:18,568 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 13:11:18,573 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 13:11:18,853 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 13:11:18,860 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 13:11:18,860 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 13:11:18,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:11:18 BoogieIcfgContainer [2023-08-27 13:11:18,862 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 13:11:18,864 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 13:11:18,864 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 13:11:18,869 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 13:11:18,870 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 01:11:18" (1/3) ... [2023-08-27 13:11:18,870 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e08ff47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:11:18, skipping insertion in model container [2023-08-27 13:11:18,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:11:18" (2/3) ... [2023-08-27 13:11:18,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e08ff47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:11:18, skipping insertion in model container [2023-08-27 13:11:18,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:11:18" (3/3) ... [2023-08-27 13:11:18,873 INFO L112 eAbstractionObserver]: Analyzing ICFG clever.wvr.c [2023-08-27 13:11:18,885 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 13:11:18,886 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-27 13:11:18,886 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 13:11:18,983 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 13:11:19,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 132 transitions, 280 flow [2023-08-27 13:11:19,065 INFO L124 PetriNetUnfolderBase]: 9/130 cut-off events. [2023-08-27 13:11:19,065 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 13:11:19,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 130 events. 9/130 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 138 event pairs, 0 based on Foata normal form. 0/114 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-08-27 13:11:19,070 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 132 transitions, 280 flow [2023-08-27 13:11:19,074 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 119 places, 121 transitions, 254 flow [2023-08-27 13:11:19,077 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 13:11:19,084 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 119 places, 121 transitions, 254 flow [2023-08-27 13:11:19,086 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 119 places, 121 transitions, 254 flow [2023-08-27 13:11:19,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 119 places, 121 transitions, 254 flow [2023-08-27 13:11:19,115 INFO L124 PetriNetUnfolderBase]: 9/121 cut-off events. [2023-08-27 13:11:19,115 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 13:11:19,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130 conditions, 121 events. 9/121 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 137 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 93. Up to 2 conditions per place. [2023-08-27 13:11:19,117 INFO L119 LiptonReduction]: Number of co-enabled transitions 1300 [2023-08-27 13:11:22,721 INFO L134 LiptonReduction]: Checked pairs total: 1341 [2023-08-27 13:11:22,722 INFO L136 LiptonReduction]: Total number of compositions: 121 [2023-08-27 13:11:22,735 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 13:11:22,741 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;@114c7668, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 13:11:22,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-08-27 13:11:22,744 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 13:11:22,744 INFO L124 PetriNetUnfolderBase]: 3/9 cut-off events. [2023-08-27 13:11:22,744 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 13:11:22,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:22,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 13:11:22,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:22,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:22,750 INFO L85 PathProgramCache]: Analyzing trace with hash 15115781, now seen corresponding path program 1 times [2023-08-27 13:11:22,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:22,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664111480] [2023-08-27 13:11:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:22,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:22,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:23,018 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 13:11:23,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:23,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664111480] [2023-08-27 13:11:23,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664111480] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:11:23,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:11:23,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 13:11:23,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141604973] [2023-08-27 13:11:23,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:11:23,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:11:23,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:23,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:11:23,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:11:23,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 253 [2023-08-27 13:11:23,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:23,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 253 [2023-08-27 13:11:23,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:23,199 INFO L124 PetriNetUnfolderBase]: 215/356 cut-off events. [2023-08-27 13:11:23,199 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2023-08-27 13:11:23,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 356 events. 215/356 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1303 event pairs, 69 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 660. Up to 183 conditions per place. [2023-08-27 13:11:23,206 INFO L140 encePairwiseOnDemand]: 249/253 looper letters, 36 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-27 13:11:23,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 39 transitions, 177 flow [2023-08-27 13:11:23,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:11:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:11:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2023-08-27 13:11:23,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5032938076416338 [2023-08-27 13:11:23,227 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2023-08-27 13:11:23,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2023-08-27 13:11:23,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:23,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2023-08-27 13:11:23,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,246 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 382 transitions. [2023-08-27 13:11:23,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 39 transitions, 177 flow [2023-08-27 13:11:23,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 39 transitions, 163 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 13:11:23,252 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 68 flow [2023-08-27 13:11:23,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-08-27 13:11:23,258 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2023-08-27 13:11:23,259 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 68 flow [2023-08-27 13:11:23,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:23,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 13:11:23,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 13:11:23,260 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:23,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:23,262 INFO L85 PathProgramCache]: Analyzing trace with hash 15115780, now seen corresponding path program 1 times [2023-08-27 13:11:23,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:23,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584417200] [2023-08-27 13:11:23,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:23,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:23,384 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 13:11:23,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:23,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584417200] [2023-08-27 13:11:23,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584417200] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:11:23,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:11:23,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 13:11:23,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984507428] [2023-08-27 13:11:23,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:11:23,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:11:23,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:23,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:11:23,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:11:23,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 253 [2023-08-27 13:11:23,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:23,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 253 [2023-08-27 13:11:23,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:23,460 INFO L124 PetriNetUnfolderBase]: 191/322 cut-off events. [2023-08-27 13:11:23,460 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2023-08-27 13:11:23,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 702 conditions, 322 events. 191/322 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1138 event pairs, 135 based on Foata normal form. 20/194 useless extension candidates. Maximal degree in co-relation 308. Up to 322 conditions per place. [2023-08-27 13:11:23,464 INFO L140 encePairwiseOnDemand]: 251/253 looper letters, 20 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-08-27 13:11:23,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 100 flow [2023-08-27 13:11:23,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:11:23,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:11:23,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-27 13:11:23,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2023-08-27 13:11:23,468 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-27 13:11:23,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-27 13:11:23,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:23,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-27 13:11:23,469 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,472 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,473 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,473 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 68 flow. Second operand 3 states and 363 transitions. [2023-08-27 13:11:23,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 100 flow [2023-08-27 13:11:23,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 96 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 13:11:23,474 INFO L231 Difference]: Finished difference. Result has 24 places, 21 transitions, 56 flow [2023-08-27 13:11:23,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=24, PETRI_TRANSITIONS=21} [2023-08-27 13:11:23,475 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -1 predicate places. [2023-08-27 13:11:23,476 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 21 transitions, 56 flow [2023-08-27 13:11:23,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:23,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 13:11:23,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 13:11:23,477 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:23,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:23,481 INFO L85 PathProgramCache]: Analyzing trace with hash 15115796, now seen corresponding path program 1 times [2023-08-27 13:11:23,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:23,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959075131] [2023-08-27 13:11:23,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:23,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:23,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:23,552 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 13:11:23,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:23,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959075131] [2023-08-27 13:11:23,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959075131] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:11:23,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:11:23,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 13:11:23,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144148720] [2023-08-27 13:11:23,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:11:23,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:11:23,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:23,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:11:23,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:11:23,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 253 [2023-08-27 13:11:23,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 21 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:23,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 253 [2023-08-27 13:11:23,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:23,630 INFO L124 PetriNetUnfolderBase]: 289/480 cut-off events. [2023-08-27 13:11:23,630 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 13:11:23,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1043 conditions, 480 events. 289/480 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1936 event pairs, 135 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 1035. Up to 323 conditions per place. [2023-08-27 13:11:23,633 INFO L140 encePairwiseOnDemand]: 249/253 looper letters, 36 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2023-08-27 13:11:23,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 38 transitions, 175 flow [2023-08-27 13:11:23,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:11:23,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:11:23,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 380 transitions. [2023-08-27 13:11:23,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5006587615283268 [2023-08-27 13:11:23,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 380 transitions. [2023-08-27 13:11:23,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 380 transitions. [2023-08-27 13:11:23,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:23,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 380 transitions. [2023-08-27 13:11:23,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.66666666666667) internal successors, (380), 3 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,638 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,639 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,639 INFO L175 Difference]: Start difference. First operand has 24 places, 21 transitions, 56 flow. Second operand 3 states and 380 transitions. [2023-08-27 13:11:23,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 38 transitions, 175 flow [2023-08-27 13:11:23,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 38 transitions, 174 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 13:11:23,641 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 75 flow [2023-08-27 13:11:23,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-27 13:11:23,642 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-08-27 13:11:23,642 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 75 flow [2023-08-27 13:11:23,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.33333333333333) internal successors, (346), 3 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:23,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 13:11:23,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 13:11:23,643 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:23,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:23,643 INFO L85 PathProgramCache]: Analyzing trace with hash 468622518, now seen corresponding path program 1 times [2023-08-27 13:11:23,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:23,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635140443] [2023-08-27 13:11:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:23,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:23,739 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 13:11:23,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:23,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635140443] [2023-08-27 13:11:23,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635140443] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:11:23,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:11:23,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 13:11:23,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446863037] [2023-08-27 13:11:23,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:11:23,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:11:23,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:23,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:11:23,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:11:23,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 253 [2023-08-27 13:11:23,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:23,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 253 [2023-08-27 13:11:23,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:23,820 INFO L124 PetriNetUnfolderBase]: 451/724 cut-off events. [2023-08-27 13:11:23,821 INFO L125 PetriNetUnfolderBase]: For 202/202 co-relation queries the response was YES. [2023-08-27 13:11:23,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 724 events. 451/724 cut-off events. For 202/202 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3059 event pairs, 149 based on Foata normal form. 0/450 useless extension candidates. Maximal degree in co-relation 1757. Up to 380 conditions per place. [2023-08-27 13:11:23,825 INFO L140 encePairwiseOnDemand]: 249/253 looper letters, 38 selfloop transitions, 3 changer transitions 0/41 dead transitions. [2023-08-27 13:11:23,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 41 transitions, 217 flow [2023-08-27 13:11:23,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:11:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:11:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-27 13:11:23,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4980237154150198 [2023-08-27 13:11:23,827 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-27 13:11:23,827 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-27 13:11:23,827 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:23,827 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-27 13:11:23,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,830 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,830 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,830 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 75 flow. Second operand 3 states and 378 transitions. [2023-08-27 13:11:23,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 41 transitions, 217 flow [2023-08-27 13:11:23,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 41 transitions, 209 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 13:11:23,833 INFO L231 Difference]: Finished difference. Result has 29 places, 25 transitions, 93 flow [2023-08-27 13:11:23,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=29, PETRI_TRANSITIONS=25} [2023-08-27 13:11:23,834 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-27 13:11:23,834 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 25 transitions, 93 flow [2023-08-27 13:11:23,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:23,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 13:11:23,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 13:11:23,835 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:23,835 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:23,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1642396680, now seen corresponding path program 1 times [2023-08-27 13:11:23,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:23,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129642527] [2023-08-27 13:11:23,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:23,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:23,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:23,865 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 13:11:23,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:23,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129642527] [2023-08-27 13:11:23,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129642527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:11:23,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:11:23,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 13:11:23,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872800357] [2023-08-27 13:11:23,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:11:23,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:11:23,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:23,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:11:23,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 13:11:23,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 253 [2023-08-27 13:11:23,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 25 transitions, 93 flow. Second operand has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:23,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 253 [2023-08-27 13:11:23,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:23,925 INFO L124 PetriNetUnfolderBase]: 351/586 cut-off events. [2023-08-27 13:11:23,925 INFO L125 PetriNetUnfolderBase]: For 315/315 co-relation queries the response was YES. [2023-08-27 13:11:23,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1555 conditions, 586 events. 351/586 cut-off events. For 315/315 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2415 event pairs, 253 based on Foata normal form. 76/552 useless extension candidates. Maximal degree in co-relation 1543. Up to 586 conditions per place. [2023-08-27 13:11:23,929 INFO L140 encePairwiseOnDemand]: 251/253 looper letters, 22 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-27 13:11:23,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 129 flow [2023-08-27 13:11:23,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:11:23,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:11:23,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-08-27 13:11:23,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4769433465085639 [2023-08-27 13:11:23,931 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-08-27 13:11:23,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-08-27 13:11:23,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:23,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-08-27 13:11:23,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,934 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,935 INFO L175 Difference]: Start difference. First operand has 29 places, 25 transitions, 93 flow. Second operand 3 states and 362 transitions. [2023-08-27 13:11:23,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 129 flow [2023-08-27 13:11:23,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 23 transitions, 125 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 13:11:23,936 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 81 flow [2023-08-27 13:11:23,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-08-27 13:11:23,937 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-08-27 13:11:23,937 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 81 flow [2023-08-27 13:11:23,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.0) internal successors, (348), 3 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:23,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:23,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 13:11:23,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 13:11:23,938 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:23,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:23,938 INFO L85 PathProgramCache]: Analyzing trace with hash 468590430, now seen corresponding path program 1 times [2023-08-27 13:11:23,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:23,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014382751] [2023-08-27 13:11:23,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:23,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:23,972 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 13:11:23,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:23,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014382751] [2023-08-27 13:11:23,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014382751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:11:23,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211367136] [2023-08-27 13:11:23,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:23,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:23,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:11:23,976 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 13:11:24,006 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 13:11:24,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:24,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 13:11:24,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:11:24,078 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 13:11:24,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:11:24,101 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 13:11:24,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211367136] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:11:24,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:11:24,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 13:11:24,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033849962] [2023-08-27 13:11:24,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:11:24,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 13:11:24,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:24,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 13:11:24,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 13:11:24,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 253 [2023-08-27 13:11:24,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 81 flow. Second operand has 7 states, 7 states have (on average 115.42857142857143) internal successors, (808), 7 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:24,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:24,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 253 [2023-08-27 13:11:24,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:24,293 INFO L124 PetriNetUnfolderBase]: 780/1237 cut-off events. [2023-08-27 13:11:24,293 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2023-08-27 13:11:24,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3230 conditions, 1237 events. 780/1237 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5498 event pairs, 140 based on Foata normal form. 0/983 useless extension candidates. Maximal degree in co-relation 3218. Up to 336 conditions per place. [2023-08-27 13:11:24,300 INFO L140 encePairwiseOnDemand]: 249/253 looper letters, 87 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2023-08-27 13:11:24,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 99 transitions, 516 flow [2023-08-27 13:11:24,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 13:11:24,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 13:11:24,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 889 transitions. [2023-08-27 13:11:24,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019762845849802 [2023-08-27 13:11:24,303 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 889 transitions. [2023-08-27 13:11:24,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 889 transitions. [2023-08-27 13:11:24,304 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:24,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 889 transitions. [2023-08-27 13:11:24,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 127.0) internal successors, (889), 7 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 13:11:24,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 253.0) internal successors, (2024), 8 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:24,310 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 253.0) internal successors, (2024), 8 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:24,310 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 81 flow. Second operand 7 states and 889 transitions. [2023-08-27 13:11:24,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 99 transitions, 516 flow [2023-08-27 13:11:24,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 99 transitions, 515 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 13:11:24,314 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 160 flow [2023-08-27 13:11:24,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=160, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-08-27 13:11:24,316 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2023-08-27 13:11:24,316 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 160 flow [2023-08-27 13:11:24,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 115.42857142857143) internal successors, (808), 7 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:24,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:24,317 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-27 13:11:24,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 13:11:24,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-27 13:11:24,523 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:24,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:24,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1641402197, now seen corresponding path program 1 times [2023-08-27 13:11:24,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:24,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324394003] [2023-08-27 13:11:24,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:24,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:24,571 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 13:11:24,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:24,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324394003] [2023-08-27 13:11:24,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324394003] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:11:24,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206632866] [2023-08-27 13:11:24,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:24,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:24,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:11:24,573 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 13:11:24,577 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 13:11:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:24,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 13:11:24,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:11:24,645 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 13:11:24,645 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:11:24,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206632866] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:11:24,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:11:24,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-27 13:11:24,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723251565] [2023-08-27 13:11:24,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:11:24,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 13:11:24,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:24,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 13:11:24,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-27 13:11:24,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 253 [2023-08-27 13:11:24,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 160 flow. Second operand has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:24,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:24,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 253 [2023-08-27 13:11:24,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:24,808 INFO L124 PetriNetUnfolderBase]: 674/1107 cut-off events. [2023-08-27 13:11:24,809 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2023-08-27 13:11:24,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3223 conditions, 1107 events. 674/1107 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4971 event pairs, 27 based on Foata normal form. 48/1025 useless extension candidates. Maximal degree in co-relation 3208. Up to 625 conditions per place. [2023-08-27 13:11:24,816 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 64 selfloop transitions, 7 changer transitions 0/71 dead transitions. [2023-08-27 13:11:24,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 71 transitions, 404 flow [2023-08-27 13:11:24,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 13:11:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 13:11:24,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 632 transitions. [2023-08-27 13:11:24,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49960474308300395 [2023-08-27 13:11:24,819 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 632 transitions. [2023-08-27 13:11:24,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 632 transitions. [2023-08-27 13:11:24,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:24,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 632 transitions. [2023-08-27 13:11:24,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.4) internal successors, (632), 5 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:24,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:24,823 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:24,823 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 160 flow. Second operand 5 states and 632 transitions. [2023-08-27 13:11:24,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 71 transitions, 404 flow [2023-08-27 13:11:24,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 71 transitions, 392 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-27 13:11:24,828 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 141 flow [2023-08-27 13:11:24,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=141, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2023-08-27 13:11:24,829 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 12 predicate places. [2023-08-27 13:11:24,829 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 141 flow [2023-08-27 13:11:24,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.2) internal successors, (576), 5 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:24,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:24,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 13:11:24,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 13:11:25,037 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,SelfDestructingSolverStorable6 [2023-08-27 13:11:25,037 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:25,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:25,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1642396679, now seen corresponding path program 1 times [2023-08-27 13:11:25,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:25,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303552530] [2023-08-27 13:11:25,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:25,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:25,090 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 13:11:25,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:25,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303552530] [2023-08-27 13:11:25,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303552530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:11:25,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955719789] [2023-08-27 13:11:25,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:25,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:25,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:11:25,092 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 13:11:25,095 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 13:11:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:25,151 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 13:11:25,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:11:25,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:11:25,166 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:11:25,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955719789] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:11:25,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:11:25,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [2] total 3 [2023-08-27 13:11:25,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371664381] [2023-08-27 13:11:25,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:11:25,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:11:25,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:25,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:11:25,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 13:11:25,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 253 [2023-08-27 13:11:25,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 141 flow. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:25,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:25,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 253 [2023-08-27 13:11:25,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:25,265 INFO L124 PetriNetUnfolderBase]: 555/918 cut-off events. [2023-08-27 13:11:25,265 INFO L125 PetriNetUnfolderBase]: For 509/509 co-relation queries the response was YES. [2023-08-27 13:11:25,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2630 conditions, 918 events. 555/918 cut-off events. For 509/509 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4016 event pairs, 375 based on Foata normal form. 0/868 useless extension candidates. Maximal degree in co-relation 2614. Up to 918 conditions per place. [2023-08-27 13:11:25,271 INFO L140 encePairwiseOnDemand]: 251/253 looper letters, 27 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-27 13:11:25,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 28 transitions, 193 flow [2023-08-27 13:11:25,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:11:25,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:11:25,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 363 transitions. [2023-08-27 13:11:25,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2023-08-27 13:11:25,273 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 363 transitions. [2023-08-27 13:11:25,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 363 transitions. [2023-08-27 13:11:25,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:25,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 363 transitions. [2023-08-27 13:11:25,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:25,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:25,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:25,276 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 141 flow. Second operand 3 states and 363 transitions. [2023-08-27 13:11:25,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 28 transitions, 193 flow [2023-08-27 13:11:25,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 28 transitions, 184 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 13:11:25,280 INFO L231 Difference]: Finished difference. Result has 36 places, 28 transitions, 130 flow [2023-08-27 13:11:25,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=36, PETRI_TRANSITIONS=28} [2023-08-27 13:11:25,283 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 11 predicate places. [2023-08-27 13:11:25,284 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 28 transitions, 130 flow [2023-08-27 13:11:25,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:25,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:25,285 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-27 13:11:25,293 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 13:11:25,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:25,491 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:25,491 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:25,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1641403266, now seen corresponding path program 1 times [2023-08-27 13:11:25,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:25,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798497467] [2023-08-27 13:11:25,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:25,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:25,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:11:25,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:25,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798497467] [2023-08-27 13:11:25,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798497467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:11:25,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731378168] [2023-08-27 13:11:25,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:25,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:25,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:11:25,540 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 13:11:25,542 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 13:11:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:25,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 13:11:25,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:11:25,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:11:25,612 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:11:25,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:11:25,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731378168] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:11:25,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:11:25,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-08-27 13:11:25,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668881967] [2023-08-27 13:11:25,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:11:25,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 13:11:25,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:25,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 13:11:25,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-27 13:11:25,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 253 [2023-08-27 13:11:25,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 28 transitions, 130 flow. Second operand has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:25,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:25,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 253 [2023-08-27 13:11:25,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:25,816 INFO L124 PetriNetUnfolderBase]: 979/1672 cut-off events. [2023-08-27 13:11:25,816 INFO L125 PetriNetUnfolderBase]: For 764/764 co-relation queries the response was YES. [2023-08-27 13:11:25,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4525 conditions, 1672 events. 979/1672 cut-off events. For 764/764 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8232 event pairs, 93 based on Foata normal form. 0/1672 useless extension candidates. Maximal degree in co-relation 4507. Up to 584 conditions per place. [2023-08-27 13:11:25,827 INFO L140 encePairwiseOnDemand]: 249/253 looper letters, 74 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2023-08-27 13:11:25,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 83 transitions, 523 flow [2023-08-27 13:11:25,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 13:11:25,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 13:11:25,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 717 transitions. [2023-08-27 13:11:25,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4723320158102767 [2023-08-27 13:11:25,830 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 717 transitions. [2023-08-27 13:11:25,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 717 transitions. [2023-08-27 13:11:25,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:25,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 717 transitions. [2023-08-27 13:11:25,832 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 119.5) internal successors, (717), 6 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:25,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:25,836 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:25,836 INFO L175 Difference]: Start difference. First operand has 36 places, 28 transitions, 130 flow. Second operand 6 states and 717 transitions. [2023-08-27 13:11:25,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 83 transitions, 523 flow [2023-08-27 13:11:25,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 83 transitions, 522 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 13:11:25,842 INFO L231 Difference]: Finished difference. Result has 40 places, 33 transitions, 193 flow [2023-08-27 13:11:25,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=40, PETRI_TRANSITIONS=33} [2023-08-27 13:11:25,844 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2023-08-27 13:11:25,844 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 33 transitions, 193 flow [2023-08-27 13:11:25,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 112.0) internal successors, (672), 6 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:25,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:25,845 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-27 13:11:25,854 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 13:11:26,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:26,052 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:26,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:26,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1134536852, now seen corresponding path program 2 times [2023-08-27 13:11:26,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:26,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100658349] [2023-08-27 13:11:26,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:26,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:26,128 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 13:11:26,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:26,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100658349] [2023-08-27 13:11:26,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100658349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:11:26,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121003675] [2023-08-27 13:11:26,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:11:26,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:26,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:11:26,130 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 13:11:26,152 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 13:11:26,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 13:11:26,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:11:26,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 13:11:26,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:11:26,204 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 13:11:26,204 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 13:11:26,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121003675] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:11:26,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 13:11:26,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-27 13:11:26,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803221593] [2023-08-27 13:11:26,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:11:26,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 13:11:26,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:26,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 13:11:26,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 13:11:26,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 253 [2023-08-27 13:11:26,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 33 transitions, 193 flow. Second operand has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:26,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:26,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 253 [2023-08-27 13:11:26,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:26,327 INFO L124 PetriNetUnfolderBase]: 937/1600 cut-off events. [2023-08-27 13:11:26,327 INFO L125 PetriNetUnfolderBase]: For 1268/1268 co-relation queries the response was YES. [2023-08-27 13:11:26,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4598 conditions, 1600 events. 937/1600 cut-off events. For 1268/1268 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8128 event pairs, 651 based on Foata normal form. 30/1630 useless extension candidates. Maximal degree in co-relation 4578. Up to 1600 conditions per place. [2023-08-27 13:11:26,337 INFO L140 encePairwiseOnDemand]: 251/253 looper letters, 31 selfloop transitions, 1 changer transitions 0/32 dead transitions. [2023-08-27 13:11:26,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 247 flow [2023-08-27 13:11:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 13:11:26,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 13:11:26,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 361 transitions. [2023-08-27 13:11:26,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4756258234519104 [2023-08-27 13:11:26,339 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 361 transitions. [2023-08-27 13:11:26,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 361 transitions. [2023-08-27 13:11:26,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:26,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 361 transitions. [2023-08-27 13:11:26,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.33333333333333) internal successors, (361), 3 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:26,341 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:26,342 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:26,342 INFO L175 Difference]: Start difference. First operand has 40 places, 33 transitions, 193 flow. Second operand 3 states and 361 transitions. [2023-08-27 13:11:26,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 247 flow [2023-08-27 13:11:26,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 32 transitions, 214 flow, removed 3 selfloop flow, removed 7 redundant places. [2023-08-27 13:11:26,347 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 152 flow [2023-08-27 13:11:26,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2023-08-27 13:11:26,349 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 9 predicate places. [2023-08-27 13:11:26,349 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 152 flow [2023-08-27 13:11:26,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.66666666666667) internal successors, (350), 3 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:26,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:26,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:11:26,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 13:11:26,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-27 13:11:26,557 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:26,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:26,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1710150541, now seen corresponding path program 1 times [2023-08-27 13:11:26,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:26,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924203289] [2023-08-27 13:11:26,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:26,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:26,776 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 13:11:26,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:26,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924203289] [2023-08-27 13:11:26,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924203289] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:11:26,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:11:26,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 13:11:26,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018786723] [2023-08-27 13:11:26,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:11:26,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 13:11:26,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:26,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 13:11:26,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 13:11:26,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 253 [2023-08-27 13:11:26,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:26,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:26,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 253 [2023-08-27 13:11:26,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:26,961 INFO L124 PetriNetUnfolderBase]: 1005/1712 cut-off events. [2023-08-27 13:11:26,961 INFO L125 PetriNetUnfolderBase]: For 733/733 co-relation queries the response was YES. [2023-08-27 13:11:26,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4503 conditions, 1712 events. 1005/1712 cut-off events. For 733/733 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8518 event pairs, 201 based on Foata normal form. 4/1716 useless extension candidates. Maximal degree in co-relation 4488. Up to 1551 conditions per place. [2023-08-27 13:11:26,969 INFO L140 encePairwiseOnDemand]: 248/253 looper letters, 50 selfloop transitions, 6 changer transitions 2/58 dead transitions. [2023-08-27 13:11:26,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 58 transitions, 353 flow [2023-08-27 13:11:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 13:11:26,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 13:11:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 465 transitions. [2023-08-27 13:11:26,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45948616600790515 [2023-08-27 13:11:26,972 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 465 transitions. [2023-08-27 13:11:26,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 465 transitions. [2023-08-27 13:11:26,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:26,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 465 transitions. [2023-08-27 13:11:26,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.25) internal successors, (465), 4 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 13:11:26,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:26,976 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:26,976 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 152 flow. Second operand 4 states and 465 transitions. [2023-08-27 13:11:26,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 58 transitions, 353 flow [2023-08-27 13:11:26,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 58 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 13:11:26,980 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 200 flow [2023-08-27 13:11:26,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2023-08-27 13:11:26,981 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 13 predicate places. [2023-08-27 13:11:26,981 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 200 flow [2023-08-27 13:11:26,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:26,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:26,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:11:26,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 13:11:26,982 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:26,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:26,982 INFO L85 PathProgramCache]: Analyzing trace with hash 352367038, now seen corresponding path program 1 times [2023-08-27 13:11:26,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:26,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080825361] [2023-08-27 13:11:26,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:26,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:27,029 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 13:11:27,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:27,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080825361] [2023-08-27 13:11:27,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080825361] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:11:27,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:11:27,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 13:11:27,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648258824] [2023-08-27 13:11:27,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:11:27,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 13:11:27,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:27,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 13:11:27,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 13:11:27,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 253 [2023-08-27 13:11:27,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:27,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:27,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 253 [2023-08-27 13:11:27,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:27,177 INFO L124 PetriNetUnfolderBase]: 999/1706 cut-off events. [2023-08-27 13:11:27,177 INFO L125 PetriNetUnfolderBase]: For 1415/1415 co-relation queries the response was YES. [2023-08-27 13:11:27,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4828 conditions, 1706 events. 999/1706 cut-off events. For 1415/1415 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8782 event pairs, 113 based on Foata normal form. 6/1712 useless extension candidates. Maximal degree in co-relation 4810. Up to 892 conditions per place. [2023-08-27 13:11:27,188 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 71 selfloop transitions, 9 changer transitions 8/88 dead transitions. [2023-08-27 13:11:27,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 88 transitions, 608 flow [2023-08-27 13:11:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 13:11:27,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 13:11:27,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 573 transitions. [2023-08-27 13:11:27,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45296442687747035 [2023-08-27 13:11:27,190 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 573 transitions. [2023-08-27 13:11:27,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 573 transitions. [2023-08-27 13:11:27,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:27,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 573 transitions. [2023-08-27 13:11:27,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 114.6) internal successors, (573), 5 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:27,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:27,194 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:27,194 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 200 flow. Second operand 5 states and 573 transitions. [2023-08-27 13:11:27,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 88 transitions, 608 flow [2023-08-27 13:11:27,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 88 transitions, 608 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 13:11:27,198 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 265 flow [2023-08-27 13:11:27,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-08-27 13:11:27,198 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 19 predicate places. [2023-08-27 13:11:27,198 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 265 flow [2023-08-27 13:11:27,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:27,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:27,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:11:27,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 13:11:27,199 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:27,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:27,199 INFO L85 PathProgramCache]: Analyzing trace with hash 218151876, now seen corresponding path program 2 times [2023-08-27 13:11:27,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:27,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330020914] [2023-08-27 13:11:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:27,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:27,240 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 13:11:27,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:27,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330020914] [2023-08-27 13:11:27,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330020914] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:11:27,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:11:27,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 13:11:27,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154830025] [2023-08-27 13:11:27,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:11:27,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 13:11:27,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:27,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 13:11:27,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 13:11:27,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 253 [2023-08-27 13:11:27,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 265 flow. Second operand has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:27,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:27,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 253 [2023-08-27 13:11:27,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:27,386 INFO L124 PetriNetUnfolderBase]: 957/1638 cut-off events. [2023-08-27 13:11:27,386 INFO L125 PetriNetUnfolderBase]: For 1759/1759 co-relation queries the response was YES. [2023-08-27 13:11:27,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5283 conditions, 1638 events. 957/1638 cut-off events. For 1759/1759 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8230 event pairs, 152 based on Foata normal form. 14/1652 useless extension candidates. Maximal degree in co-relation 5261. Up to 1084 conditions per place. [2023-08-27 13:11:27,398 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 38 selfloop transitions, 20 changer transitions 5/63 dead transitions. [2023-08-27 13:11:27,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 63 transitions, 461 flow [2023-08-27 13:11:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 13:11:27,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 13:11:27,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 569 transitions. [2023-08-27 13:11:27,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.449802371541502 [2023-08-27 13:11:27,400 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 569 transitions. [2023-08-27 13:11:27,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 569 transitions. [2023-08-27 13:11:27,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:27,401 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 569 transitions. [2023-08-27 13:11:27,402 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.8) internal successors, (569), 5 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:27,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:27,404 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:27,404 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 265 flow. Second operand 5 states and 569 transitions. [2023-08-27 13:11:27,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 63 transitions, 461 flow [2023-08-27 13:11:27,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 63 transitions, 459 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-27 13:11:27,408 INFO L231 Difference]: Finished difference. Result has 50 places, 41 transitions, 317 flow [2023-08-27 13:11:27,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=50, PETRI_TRANSITIONS=41} [2023-08-27 13:11:27,409 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 25 predicate places. [2023-08-27 13:11:27,409 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 41 transitions, 317 flow [2023-08-27 13:11:27,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:27,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:27,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:11:27,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 13:11:27,410 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:27,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:27,410 INFO L85 PathProgramCache]: Analyzing trace with hash 915332485, now seen corresponding path program 1 times [2023-08-27 13:11:27,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:27,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031622810] [2023-08-27 13:11:27,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:27,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:27,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:11:27,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:27,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031622810] [2023-08-27 13:11:27,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031622810] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:11:27,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049634133] [2023-08-27 13:11:27,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:27,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:27,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:11:27,857 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 13:11:27,882 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 13:11:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:27,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 13:11:27,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:11:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:11:28,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:11:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:11:28,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049634133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:11:28,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:11:28,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-27 13:11:28,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729342289] [2023-08-27 13:11:28,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:11:28,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 13:11:28,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:28,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 13:11:28,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-27 13:11:28,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 253 [2023-08-27 13:11:28,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 41 transitions, 317 flow. Second operand has 13 states, 13 states have (on average 98.84615384615384) internal successors, (1285), 13 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:28,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:28,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 253 [2023-08-27 13:11:28,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:28,739 INFO L124 PetriNetUnfolderBase]: 1295/2204 cut-off events. [2023-08-27 13:11:28,739 INFO L125 PetriNetUnfolderBase]: For 3305/3305 co-relation queries the response was YES. [2023-08-27 13:11:28,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7847 conditions, 2204 events. 1295/2204 cut-off events. For 3305/3305 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 11841 event pairs, 280 based on Foata normal form. 7/2211 useless extension candidates. Maximal degree in co-relation 7821. Up to 1510 conditions per place. [2023-08-27 13:11:28,755 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 86 selfloop transitions, 24 changer transitions 5/115 dead transitions. [2023-08-27 13:11:28,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 115 transitions, 928 flow [2023-08-27 13:11:28,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 13:11:28,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 13:11:28,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1045 transitions. [2023-08-27 13:11:28,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2023-08-27 13:11:28,759 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1045 transitions. [2023-08-27 13:11:28,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1045 transitions. [2023-08-27 13:11:28,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:28,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1045 transitions. [2023-08-27 13:11:28,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 104.5) internal successors, (1045), 10 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:28,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 253.0) internal successors, (2783), 11 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:28,765 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 253.0) internal successors, (2783), 11 states have internal predecessors, (2783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:28,765 INFO L175 Difference]: Start difference. First operand has 50 places, 41 transitions, 317 flow. Second operand 10 states and 1045 transitions. [2023-08-27 13:11:28,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 115 transitions, 928 flow [2023-08-27 13:11:28,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 115 transitions, 902 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-27 13:11:28,772 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 522 flow [2023-08-27 13:11:28,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=522, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-08-27 13:11:28,773 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 37 predicate places. [2023-08-27 13:11:28,773 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 522 flow [2023-08-27 13:11:28,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.84615384615384) internal successors, (1285), 13 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:28,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:28,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:11:28,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-27 13:11:28,979 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 13:11:28,980 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:28,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:28,980 INFO L85 PathProgramCache]: Analyzing trace with hash 207334108, now seen corresponding path program 1 times [2023-08-27 13:11:28,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:28,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84763309] [2023-08-27 13:11:28,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:28,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:28,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:11:29,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:29,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84763309] [2023-08-27 13:11:29,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84763309] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:11:29,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74396538] [2023-08-27 13:11:29,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:29,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:29,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:11:29,034 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 13:11:29,036 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 13:11:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:29,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-27 13:11:29,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:11:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:11:29,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:11:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:11:29,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74396538] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:11:29,160 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:11:29,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-08-27 13:11:29,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243213803] [2023-08-27 13:11:29,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:11:29,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 13:11:29,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:29,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 13:11:29,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-27 13:11:29,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 253 [2023-08-27 13:11:29,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 522 flow. Second operand has 8 states, 8 states have (on average 110.0) internal successors, (880), 8 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:29,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:29,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 253 [2023-08-27 13:11:29,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:29,410 INFO L124 PetriNetUnfolderBase]: 1073/1805 cut-off events. [2023-08-27 13:11:29,410 INFO L125 PetriNetUnfolderBase]: For 4243/4243 co-relation queries the response was YES. [2023-08-27 13:11:29,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7276 conditions, 1805 events. 1073/1805 cut-off events. For 4243/4243 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9241 event pairs, 60 based on Foata normal form. 142/1947 useless extension candidates. Maximal degree in co-relation 7244. Up to 1284 conditions per place. [2023-08-27 13:11:29,421 INFO L140 encePairwiseOnDemand]: 248/253 looper letters, 78 selfloop transitions, 12 changer transitions 0/90 dead transitions. [2023-08-27 13:11:29,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 90 transitions, 897 flow [2023-08-27 13:11:29,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 13:11:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 13:11:29,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 565 transitions. [2023-08-27 13:11:29,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44664031620553357 [2023-08-27 13:11:29,423 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 565 transitions. [2023-08-27 13:11:29,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 565 transitions. [2023-08-27 13:11:29,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:29,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 565 transitions. [2023-08-27 13:11:29,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 113.0) internal successors, (565), 5 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:29,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:29,427 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:29,427 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 522 flow. Second operand 5 states and 565 transitions. [2023-08-27 13:11:29,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 90 transitions, 897 flow [2023-08-27 13:11:29,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 90 transitions, 852 flow, removed 17 selfloop flow, removed 3 redundant places. [2023-08-27 13:11:29,438 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 511 flow [2023-08-27 13:11:29,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=511, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2023-08-27 13:11:29,438 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 39 predicate places. [2023-08-27 13:11:29,438 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 511 flow [2023-08-27 13:11:29,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 110.0) internal successors, (880), 8 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:29,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:29,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:11:29,450 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 13:11:29,644 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 13:11:29,645 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:29,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:29,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1548441915, now seen corresponding path program 2 times [2023-08-27 13:11:29,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:29,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219724059] [2023-08-27 13:11:29,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:29,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:11:30,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:30,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219724059] [2023-08-27 13:11:30,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219724059] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:11:30,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47976613] [2023-08-27 13:11:30,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:11:30,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:30,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:11:30,053 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 13:11:30,057 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 13:11:30,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:11:30,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:11:30,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 13:11:30,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:11:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:11:30,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:11:30,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:11:30,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47976613] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:11:30,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:11:30,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-27 13:11:30,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360895240] [2023-08-27 13:11:30,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:11:30,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 13:11:30,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:30,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 13:11:30,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-08-27 13:11:30,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 253 [2023-08-27 13:11:30,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 511 flow. Second operand has 13 states, 13 states have (on average 98.84615384615384) internal successors, (1285), 13 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:30,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:30,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 253 [2023-08-27 13:11:30,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:31,424 INFO L124 PetriNetUnfolderBase]: 2072/3489 cut-off events. [2023-08-27 13:11:31,424 INFO L125 PetriNetUnfolderBase]: For 8007/8007 co-relation queries the response was YES. [2023-08-27 13:11:31,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14230 conditions, 3489 events. 2072/3489 cut-off events. For 8007/8007 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20610 event pairs, 266 based on Foata normal form. 18/3507 useless extension candidates. Maximal degree in co-relation 14198. Up to 1512 conditions per place. [2023-08-27 13:11:31,449 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 133 selfloop transitions, 77 changer transitions 7/217 dead transitions. [2023-08-27 13:11:31,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 217 transitions, 1896 flow [2023-08-27 13:11:31,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 13:11:31,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 13:11:31,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1579 transitions. [2023-08-27 13:11:31,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160737812911726 [2023-08-27 13:11:31,454 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1579 transitions. [2023-08-27 13:11:31,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1579 transitions. [2023-08-27 13:11:31,454 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:31,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1579 transitions. [2023-08-27 13:11:31,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 105.26666666666667) internal successors, (1579), 15 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:31,462 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 253.0) internal successors, (4048), 16 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:31,463 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 253.0) internal successors, (4048), 16 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:31,463 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 511 flow. Second operand 15 states and 1579 transitions. [2023-08-27 13:11:31,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 217 transitions, 1896 flow [2023-08-27 13:11:31,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 217 transitions, 1866 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 13:11:31,483 INFO L231 Difference]: Finished difference. Result has 82 places, 123 transitions, 1308 flow [2023-08-27 13:11:31,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1308, PETRI_PLACES=82, PETRI_TRANSITIONS=123} [2023-08-27 13:11:31,483 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 57 predicate places. [2023-08-27 13:11:31,484 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 123 transitions, 1308 flow [2023-08-27 13:11:31,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.84615384615384) internal successors, (1285), 13 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:31,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:31,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:11:31,497 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 13:11:31,689 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,SelfDestructingSolverStorable15 [2023-08-27 13:11:31,690 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:31,690 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:31,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1718260021, now seen corresponding path program 3 times [2023-08-27 13:11:31,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:31,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649541830] [2023-08-27 13:11:31,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:31,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:31,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:32,014 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:11:32,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:32,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649541830] [2023-08-27 13:11:32,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649541830] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:11:32,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774555793] [2023-08-27 13:11:32,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:11:32,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:32,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:11:32,017 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 13:11:32,031 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 13:11:32,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 13:11:32,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:11:32,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 13:11:32,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:11:32,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:11:32,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:11:32,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:11:32,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774555793] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:11:32,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:11:32,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-27 13:11:32,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239424246] [2023-08-27 13:11:32,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:11:32,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 13:11:32,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:32,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 13:11:32,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-08-27 13:11:32,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 253 [2023-08-27 13:11:32,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 123 transitions, 1308 flow. Second operand has 13 states, 13 states have (on average 98.84615384615384) internal successors, (1285), 13 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:32,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:32,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 253 [2023-08-27 13:11:32,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:33,350 INFO L124 PetriNetUnfolderBase]: 3496/5868 cut-off events. [2023-08-27 13:11:33,350 INFO L125 PetriNetUnfolderBase]: For 21081/21081 co-relation queries the response was YES. [2023-08-27 13:11:33,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28148 conditions, 5868 events. 3496/5868 cut-off events. For 21081/21081 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 37985 event pairs, 701 based on Foata normal form. 14/5882 useless extension candidates. Maximal degree in co-relation 28109. Up to 2717 conditions per place. [2023-08-27 13:11:33,417 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 177 selfloop transitions, 98 changer transitions 12/287 dead transitions. [2023-08-27 13:11:33,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 287 transitions, 3448 flow [2023-08-27 13:11:33,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 13:11:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 13:11:33,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1248 transitions. [2023-08-27 13:11:33,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41106719367588934 [2023-08-27 13:11:33,421 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1248 transitions. [2023-08-27 13:11:33,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1248 transitions. [2023-08-27 13:11:33,422 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:33,422 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1248 transitions. [2023-08-27 13:11:33,424 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.0) internal successors, (1248), 12 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:33,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 253.0) internal successors, (3289), 13 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:33,428 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 253.0) internal successors, (3289), 13 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:33,429 INFO L175 Difference]: Start difference. First operand has 82 places, 123 transitions, 1308 flow. Second operand 12 states and 1248 transitions. [2023-08-27 13:11:33,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 287 transitions, 3448 flow [2023-08-27 13:11:33,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 287 transitions, 3256 flow, removed 85 selfloop flow, removed 3 redundant places. [2023-08-27 13:11:33,489 INFO L231 Difference]: Finished difference. Result has 96 places, 202 transitions, 2472 flow [2023-08-27 13:11:33,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2472, PETRI_PLACES=96, PETRI_TRANSITIONS=202} [2023-08-27 13:11:33,489 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 71 predicate places. [2023-08-27 13:11:33,489 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 202 transitions, 2472 flow [2023-08-27 13:11:33,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.84615384615384) internal successors, (1285), 13 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:33,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:33,491 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:11:33,504 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 13:11:33,696 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,SelfDestructingSolverStorable16 [2023-08-27 13:11:33,696 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:33,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:33,696 INFO L85 PathProgramCache]: Analyzing trace with hash -156719400, now seen corresponding path program 1 times [2023-08-27 13:11:33,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:33,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115777818] [2023-08-27 13:11:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:33,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:33,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:33,754 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:11:33,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:33,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115777818] [2023-08-27 13:11:33,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115777818] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:11:33,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879924333] [2023-08-27 13:11:33,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:33,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:33,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:11:33,756 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 13:11:33,761 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 13:11:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:33,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 13:11:33,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:11:33,895 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:11:33,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:11:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:11:33,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879924333] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:11:33,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:11:33,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-27 13:11:33,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954861666] [2023-08-27 13:11:33,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:11:33,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 13:11:33,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:33,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 13:11:33,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-27 13:11:33,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 253 [2023-08-27 13:11:33,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 202 transitions, 2472 flow. Second operand has 11 states, 11 states have (on average 109.18181818181819) internal successors, (1201), 11 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:33,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:33,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 253 [2023-08-27 13:11:33,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:35,268 INFO L124 PetriNetUnfolderBase]: 5394/9401 cut-off events. [2023-08-27 13:11:35,268 INFO L125 PetriNetUnfolderBase]: For 59115/59115 co-relation queries the response was YES. [2023-08-27 13:11:35,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49078 conditions, 9401 events. 5394/9401 cut-off events. For 59115/59115 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 69454 event pairs, 237 based on Foata normal form. 252/9653 useless extension candidates. Maximal degree in co-relation 49033. Up to 2276 conditions per place. [2023-08-27 13:11:35,370 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 546 selfloop transitions, 186 changer transitions 11/743 dead transitions. [2023-08-27 13:11:35,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 743 transitions, 10586 flow [2023-08-27 13:11:35,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 13:11:35,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 13:11:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1361 transitions. [2023-08-27 13:11:35,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44828722002635046 [2023-08-27 13:11:35,377 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1361 transitions. [2023-08-27 13:11:35,377 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1361 transitions. [2023-08-27 13:11:35,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:35,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1361 transitions. [2023-08-27 13:11:35,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 113.41666666666667) internal successors, (1361), 12 states have internal predecessors, (1361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:35,391 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 253.0) internal successors, (3289), 13 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:35,391 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 253.0) internal successors, (3289), 13 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:35,392 INFO L175 Difference]: Start difference. First operand has 96 places, 202 transitions, 2472 flow. Second operand 12 states and 1361 transitions. [2023-08-27 13:11:35,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 743 transitions, 10586 flow [2023-08-27 13:11:35,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 743 transitions, 10040 flow, removed 246 selfloop flow, removed 5 redundant places. [2023-08-27 13:11:35,538 INFO L231 Difference]: Finished difference. Result has 111 places, 364 transitions, 5420 flow [2023-08-27 13:11:35,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=2323, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5420, PETRI_PLACES=111, PETRI_TRANSITIONS=364} [2023-08-27 13:11:35,539 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 86 predicate places. [2023-08-27 13:11:35,539 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 364 transitions, 5420 flow [2023-08-27 13:11:35,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 109.18181818181819) internal successors, (1201), 11 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:35,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:35,540 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:11:35,549 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 13:11:35,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-27 13:11:35,745 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:35,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:35,746 INFO L85 PathProgramCache]: Analyzing trace with hash 403365686, now seen corresponding path program 2 times [2023-08-27 13:11:35,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:35,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871610359] [2023-08-27 13:11:35,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:35,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:11:35,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:35,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871610359] [2023-08-27 13:11:35,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871610359] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:11:35,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228993169] [2023-08-27 13:11:35,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:11:35,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:35,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:11:35,813 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 13:11:35,816 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 13:11:35,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:11:35,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:11:35,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 13:11:35,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:11:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:11:35,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:11:35,989 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:11:35,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228993169] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:11:35,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:11:35,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2023-08-27 13:11:35,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328990821] [2023-08-27 13:11:35,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:11:35,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 13:11:35,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:35,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 13:11:35,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-27 13:11:35,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 253 [2023-08-27 13:11:35,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 364 transitions, 5420 flow. Second operand has 10 states, 10 states have (on average 109.6) internal successors, (1096), 10 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:35,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:35,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 253 [2023-08-27 13:11:35,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:37,762 INFO L124 PetriNetUnfolderBase]: 5986/10783 cut-off events. [2023-08-27 13:11:37,762 INFO L125 PetriNetUnfolderBase]: For 104528/104528 co-relation queries the response was YES. [2023-08-27 13:11:37,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68582 conditions, 10783 events. 5986/10783 cut-off events. For 104528/104528 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 85144 event pairs, 584 based on Foata normal form. 176/10959 useless extension candidates. Maximal degree in co-relation 68530. Up to 3107 conditions per place. [2023-08-27 13:11:37,855 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 372 selfloop transitions, 390 changer transitions 0/762 dead transitions. [2023-08-27 13:11:37,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 762 transitions, 12161 flow [2023-08-27 13:11:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 13:11:37,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 13:11:37,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1581 transitions. [2023-08-27 13:11:37,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4463579898362507 [2023-08-27 13:11:37,861 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1581 transitions. [2023-08-27 13:11:37,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1581 transitions. [2023-08-27 13:11:37,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:37,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1581 transitions. [2023-08-27 13:11:37,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 112.92857142857143) internal successors, (1581), 14 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:37,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 253.0) internal successors, (3795), 15 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:37,869 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 253.0) internal successors, (3795), 15 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:37,870 INFO L175 Difference]: Start difference. First operand has 111 places, 364 transitions, 5420 flow. Second operand 14 states and 1581 transitions. [2023-08-27 13:11:37,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 762 transitions, 12161 flow [2023-08-27 13:11:38,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 762 transitions, 11877 flow, removed 138 selfloop flow, removed 1 redundant places. [2023-08-27 13:11:38,265 INFO L231 Difference]: Finished difference. Result has 131 places, 540 transitions, 9651 flow [2023-08-27 13:11:38,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=5230, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=9651, PETRI_PLACES=131, PETRI_TRANSITIONS=540} [2023-08-27 13:11:38,266 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 106 predicate places. [2023-08-27 13:11:38,266 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 540 transitions, 9651 flow [2023-08-27 13:11:38,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 109.6) internal successors, (1096), 10 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:38,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:38,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:11:38,272 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 13:11:38,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:38,472 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:38,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:38,473 INFO L85 PathProgramCache]: Analyzing trace with hash 892283909, now seen corresponding path program 3 times [2023-08-27 13:11:38,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:38,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584749817] [2023-08-27 13:11:38,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:38,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:38,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:11:38,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584749817] [2023-08-27 13:11:38,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584749817] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:11:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625790413] [2023-08-27 13:11:38,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:11:38,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:38,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:11:38,869 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 13:11:38,892 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 13:11:39,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 13:11:39,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:11:39,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 13:11:39,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:11:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:11:39,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:11:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:11:40,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625790413] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:11:40,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:11:40,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 15 [2023-08-27 13:11:40,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394192398] [2023-08-27 13:11:40,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:11:40,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 13:11:40,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:40,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 13:11:40,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-08-27 13:11:40,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 253 [2023-08-27 13:11:40,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 540 transitions, 9651 flow. Second operand has 17 states, 17 states have (on average 98.6470588235294) internal successors, (1677), 17 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:40,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:40,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 253 [2023-08-27 13:11:40,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:45,627 INFO L124 PetriNetUnfolderBase]: 7349/13252 cut-off events. [2023-08-27 13:11:45,627 INFO L125 PetriNetUnfolderBase]: For 164208/164208 co-relation queries the response was YES. [2023-08-27 13:11:45,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92108 conditions, 13252 events. 7349/13252 cut-off events. For 164208/164208 co-relation queries the response was YES. Maximal size of possible extension queue 897. Compared 107683 event pairs, 600 based on Foata normal form. 46/13298 useless extension candidates. Maximal degree in co-relation 92047. Up to 10302 conditions per place. [2023-08-27 13:11:45,746 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 664 selfloop transitions, 213 changer transitions 26/903 dead transitions. [2023-08-27 13:11:45,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 903 transitions, 17150 flow [2023-08-27 13:11:45,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 13:11:45,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 13:11:45,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1981 transitions. [2023-08-27 13:11:45,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41210734345745786 [2023-08-27 13:11:45,750 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1981 transitions. [2023-08-27 13:11:45,750 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1981 transitions. [2023-08-27 13:11:45,751 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:45,751 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1981 transitions. [2023-08-27 13:11:45,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 104.26315789473684) internal successors, (1981), 19 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:45,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 253.0) internal successors, (5060), 20 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:45,760 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 253.0) internal successors, (5060), 20 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:45,760 INFO L175 Difference]: Start difference. First operand has 131 places, 540 transitions, 9651 flow. Second operand 19 states and 1981 transitions. [2023-08-27 13:11:45,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 903 transitions, 17150 flow [2023-08-27 13:11:46,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 903 transitions, 16506 flow, removed 311 selfloop flow, removed 3 redundant places. [2023-08-27 13:11:46,770 INFO L231 Difference]: Finished difference. Result has 158 places, 708 transitions, 13296 flow [2023-08-27 13:11:46,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=9241, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=13296, PETRI_PLACES=158, PETRI_TRANSITIONS=708} [2023-08-27 13:11:46,771 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 133 predicate places. [2023-08-27 13:11:46,771 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 708 transitions, 13296 flow [2023-08-27 13:11:46,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 98.6470588235294) internal successors, (1677), 17 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:46,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:11:46,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:11:46,776 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 13:11:46,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:46,972 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:11:46,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:11:46,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1520930629, now seen corresponding path program 4 times [2023-08-27 13:11:46,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:11:46,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481953893] [2023-08-27 13:11:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:11:46,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:11:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:11:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:11:47,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:11:47,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481953893] [2023-08-27 13:11:47,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481953893] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:11:47,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629448140] [2023-08-27 13:11:47,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:11:47,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:11:47,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:11:47,351 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 13:11:47,353 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 13:11:47,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:11:47,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:11:47,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 13:11:47,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:11:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:11:47,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:11:48,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:11:48,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629448140] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:11:48,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:11:48,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-27 13:11:48,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897376642] [2023-08-27 13:11:48,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:11:48,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 13:11:48,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:11:48,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 13:11:48,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2023-08-27 13:11:48,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 253 [2023-08-27 13:11:48,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 708 transitions, 13296 flow. Second operand has 19 states, 19 states have (on average 98.26315789473684) internal successors, (1867), 19 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:48,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:11:48,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 253 [2023-08-27 13:11:48,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:11:59,592 INFO L124 PetriNetUnfolderBase]: 9701/17509 cut-off events. [2023-08-27 13:11:59,592 INFO L125 PetriNetUnfolderBase]: For 275929/275929 co-relation queries the response was YES. [2023-08-27 13:11:59,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127841 conditions, 17509 events. 9701/17509 cut-off events. For 275929/275929 co-relation queries the response was YES. Maximal size of possible extension queue 1173. Compared 148901 event pairs, 790 based on Foata normal form. 89/17598 useless extension candidates. Maximal degree in co-relation 127768. Up to 8501 conditions per place. [2023-08-27 13:11:59,808 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 568 selfloop transitions, 757 changer transitions 17/1342 dead transitions. [2023-08-27 13:11:59,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 1342 transitions, 27221 flow [2023-08-27 13:11:59,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-27 13:11:59,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-27 13:11:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3116 transitions. [2023-08-27 13:11:59,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41054018445322793 [2023-08-27 13:11:59,814 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3116 transitions. [2023-08-27 13:11:59,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3116 transitions. [2023-08-27 13:11:59,815 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:11:59,815 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3116 transitions. [2023-08-27 13:11:59,820 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 103.86666666666666) internal successors, (3116), 30 states have internal predecessors, (3116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:59,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 253.0) internal successors, (7843), 31 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:59,830 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 253.0) internal successors, (7843), 31 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:11:59,830 INFO L175 Difference]: Start difference. First operand has 158 places, 708 transitions, 13296 flow. Second operand 30 states and 3116 transitions. [2023-08-27 13:11:59,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 1342 transitions, 27221 flow [2023-08-27 13:12:02,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 1342 transitions, 25901 flow, removed 619 selfloop flow, removed 12 redundant places. [2023-08-27 13:12:02,113 INFO L231 Difference]: Finished difference. Result has 184 places, 1144 transitions, 24207 flow [2023-08-27 13:12:02,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=12291, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=372, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=24207, PETRI_PLACES=184, PETRI_TRANSITIONS=1144} [2023-08-27 13:12:02,114 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 159 predicate places. [2023-08-27 13:12:02,114 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 1144 transitions, 24207 flow [2023-08-27 13:12:02,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 98.26315789473684) internal successors, (1867), 19 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:02,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:12:02,115 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:12:02,127 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 13:12:02,321 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,SelfDestructingSolverStorable20 [2023-08-27 13:12:02,322 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:12:02,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:12:02,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2092385435, now seen corresponding path program 5 times [2023-08-27 13:12:02,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:12:02,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767075721] [2023-08-27 13:12:02,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:12:02,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:12:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:12:02,662 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:12:02,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:12:02,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767075721] [2023-08-27 13:12:02,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767075721] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:12:02,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230429376] [2023-08-27 13:12:02,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:12:02,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:12:02,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:12:02,664 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 13:12:02,669 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 13:12:02,834 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 13:12:02,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:12:02,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 13:12:02,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:12:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:12:03,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:12:04,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:12:04,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230429376] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:12:04,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:12:04,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 15 [2023-08-27 13:12:04,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853373186] [2023-08-27 13:12:04,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:12:04,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 13:12:04,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:12:04,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 13:12:04,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-08-27 13:12:04,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 253 [2023-08-27 13:12:04,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 1144 transitions, 24207 flow. Second operand has 17 states, 17 states have (on average 98.52941176470588) internal successors, (1675), 17 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:04,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:12:04,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 253 [2023-08-27 13:12:04,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:12:12,739 INFO L124 PetriNetUnfolderBase]: 11145/20104 cut-off events. [2023-08-27 13:12:12,739 INFO L125 PetriNetUnfolderBase]: For 343850/343850 co-relation queries the response was YES. [2023-08-27 13:12:12,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154515 conditions, 20104 events. 11145/20104 cut-off events. For 343850/343850 co-relation queries the response was YES. Maximal size of possible extension queue 1378. Compared 174316 event pairs, 698 based on Foata normal form. 48/20152 useless extension candidates. Maximal degree in co-relation 154437. Up to 9957 conditions per place. [2023-08-27 13:12:13,090 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 579 selfloop transitions, 948 changer transitions 16/1543 dead transitions. [2023-08-27 13:12:13,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 1543 transitions, 35077 flow [2023-08-27 13:12:13,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 13:12:13,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 13:12:13,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2479 transitions. [2023-08-27 13:12:13,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40826745718050067 [2023-08-27 13:12:13,094 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2479 transitions. [2023-08-27 13:12:13,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2479 transitions. [2023-08-27 13:12:13,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:12:13,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2479 transitions. [2023-08-27 13:12:13,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 103.29166666666667) internal successors, (2479), 24 states have internal predecessors, (2479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:13,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 253.0) internal successors, (6325), 25 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:13,105 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 253.0) internal successors, (6325), 25 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:13,105 INFO L175 Difference]: Start difference. First operand has 184 places, 1144 transitions, 24207 flow. Second operand 24 states and 2479 transitions. [2023-08-27 13:12:13,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 1543 transitions, 35077 flow [2023-08-27 13:12:17,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 1543 transitions, 32439 flow, removed 1288 selfloop flow, removed 11 redundant places. [2023-08-27 13:12:17,769 INFO L231 Difference]: Finished difference. Result has 205 places, 1418 transitions, 32299 flow [2023-08-27 13:12:17,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=21034, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1090, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=652, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=32299, PETRI_PLACES=205, PETRI_TRANSITIONS=1418} [2023-08-27 13:12:17,771 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 180 predicate places. [2023-08-27 13:12:17,771 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 1418 transitions, 32299 flow [2023-08-27 13:12:17,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 98.52941176470588) internal successors, (1675), 17 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:17,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:12:17,772 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:12:17,777 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 13:12:17,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:12:17,977 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:12:17,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:12:17,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1968268352, now seen corresponding path program 6 times [2023-08-27 13:12:17,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:12:17,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889600439] [2023-08-27 13:12:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:12:17,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:12:17,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:12:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:12:18,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:12:18,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889600439] [2023-08-27 13:12:18,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889600439] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:12:18,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186813561] [2023-08-27 13:12:18,038 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 13:12:18,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:12:18,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:12:18,039 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 13:12:18,045 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 13:12:18,136 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 13:12:18,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:12:18,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 13:12:18,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:12:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:12:18,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:12:18,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:12:18,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186813561] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:12:18,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:12:18,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-27 13:12:18,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581226328] [2023-08-27 13:12:18,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:12:18,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 13:12:18,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:12:18,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 13:12:18,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-08-27 13:12:18,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 253 [2023-08-27 13:12:18,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 1418 transitions, 32299 flow. Second operand has 11 states, 11 states have (on average 109.27272727272727) internal successors, (1202), 11 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:18,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:12:18,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 253 [2023-08-27 13:12:18,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:12:27,849 INFO L124 PetriNetUnfolderBase]: 13501/24507 cut-off events. [2023-08-27 13:12:27,849 INFO L125 PetriNetUnfolderBase]: For 456762/456762 co-relation queries the response was YES. [2023-08-27 13:12:28,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196428 conditions, 24507 events. 13501/24507 cut-off events. For 456762/456762 co-relation queries the response was YES. Maximal size of possible extension queue 1618. Compared 220224 event pairs, 1250 based on Foata normal form. 518/25025 useless extension candidates. Maximal degree in co-relation 196345. Up to 10347 conditions per place. [2023-08-27 13:12:28,186 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 889 selfloop transitions, 1290 changer transitions 0/2179 dead transitions. [2023-08-27 13:12:28,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 2179 transitions, 51432 flow [2023-08-27 13:12:28,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 13:12:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 13:12:28,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1580 transitions. [2023-08-27 13:12:28,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460756634669678 [2023-08-27 13:12:28,189 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1580 transitions. [2023-08-27 13:12:28,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1580 transitions. [2023-08-27 13:12:28,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:12:28,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1580 transitions. [2023-08-27 13:12:28,191 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 112.85714285714286) internal successors, (1580), 14 states have internal predecessors, (1580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:28,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 253.0) internal successors, (3795), 15 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:28,195 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 253.0) internal successors, (3795), 15 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:28,196 INFO L175 Difference]: Start difference. First operand has 205 places, 1418 transitions, 32299 flow. Second operand 14 states and 1580 transitions. [2023-08-27 13:12:28,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 2179 transitions, 51432 flow [2023-08-27 13:12:34,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 2179 transitions, 49484 flow, removed 959 selfloop flow, removed 7 redundant places. [2023-08-27 13:12:34,652 INFO L231 Difference]: Finished difference. Result has 219 places, 1815 transitions, 45708 flow [2023-08-27 13:12:34,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=30717, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=917, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=45708, PETRI_PLACES=219, PETRI_TRANSITIONS=1815} [2023-08-27 13:12:34,654 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 194 predicate places. [2023-08-27 13:12:34,654 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 1815 transitions, 45708 flow [2023-08-27 13:12:34,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 109.27272727272727) internal successors, (1202), 11 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:34,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:12:34,655 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:12:34,663 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 13:12:34,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:12:34,863 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:12:34,863 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:12:34,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1339621632, now seen corresponding path program 7 times [2023-08-27 13:12:34,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:12:34,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114503426] [2023-08-27 13:12:34,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:12:34,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:12:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:12:34,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:12:34,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:12:34,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114503426] [2023-08-27 13:12:34,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114503426] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:12:34,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836196912] [2023-08-27 13:12:34,933 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 13:12:34,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:12:34,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:12:34,937 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 13:12:34,940 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 13:12:35,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:12:35,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 13:12:35,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:12:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:12:35,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:12:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:12:35,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836196912] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:12:35,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:12:35,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2023-08-27 13:12:35,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806888659] [2023-08-27 13:12:35,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:12:35,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 13:12:35,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:12:35,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 13:12:35,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-27 13:12:35,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 253 [2023-08-27 13:12:35,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 1815 transitions, 45708 flow. Second operand has 10 states, 10 states have (on average 109.7) internal successors, (1097), 10 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:35,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:12:35,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 253 [2023-08-27 13:12:35,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:12:48,093 INFO L124 PetriNetUnfolderBase]: 13450/24593 cut-off events. [2023-08-27 13:12:48,093 INFO L125 PetriNetUnfolderBase]: For 589533/589533 co-relation queries the response was YES. [2023-08-27 13:12:48,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217808 conditions, 24593 events. 13450/24593 cut-off events. For 589533/589533 co-relation queries the response was YES. Maximal size of possible extension queue 1647. Compared 224350 event pairs, 382 based on Foata normal form. 236/24829 useless extension candidates. Maximal degree in co-relation 217717. Up to 7498 conditions per place. [2023-08-27 13:12:48,497 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 1717 selfloop transitions, 907 changer transitions 0/2624 dead transitions. [2023-08-27 13:12:48,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 2624 transitions, 63843 flow [2023-08-27 13:12:48,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 13:12:48,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 13:12:48,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1686 transitions. [2023-08-27 13:12:48,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4442687747035573 [2023-08-27 13:12:48,500 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1686 transitions. [2023-08-27 13:12:48,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1686 transitions. [2023-08-27 13:12:48,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:12:48,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1686 transitions. [2023-08-27 13:12:48,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 112.4) internal successors, (1686), 15 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:48,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 253.0) internal successors, (4048), 16 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:48,505 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 253.0) internal successors, (4048), 16 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:48,505 INFO L175 Difference]: Start difference. First operand has 219 places, 1815 transitions, 45708 flow. Second operand 15 states and 1686 transitions. [2023-08-27 13:12:48,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 2624 transitions, 63843 flow [2023-08-27 13:12:57,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 2624 transitions, 63568 flow, removed 109 selfloop flow, removed 3 redundant places. [2023-08-27 13:12:57,448 INFO L231 Difference]: Finished difference. Result has 235 places, 1986 transitions, 53438 flow [2023-08-27 13:12:57,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=45146, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1801, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=982, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=53438, PETRI_PLACES=235, PETRI_TRANSITIONS=1986} [2023-08-27 13:12:57,450 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 210 predicate places. [2023-08-27 13:12:57,450 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 1986 transitions, 53438 flow [2023-08-27 13:12:57,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 109.7) internal successors, (1097), 10 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:57,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:12:57,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:12:57,457 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 13:12:57,656 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,SelfDestructingSolverStorable23 [2023-08-27 13:12:57,657 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:12:57,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:12:57,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1986922399, now seen corresponding path program 8 times [2023-08-27 13:12:57,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:12:57,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404205657] [2023-08-27 13:12:57,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:12:57,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:12:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:12:58,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:12:58,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:12:58,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404205657] [2023-08-27 13:12:58,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404205657] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:12:58,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717087368] [2023-08-27 13:12:58,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:12:58,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:12:58,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:12:58,017 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 13:12:58,021 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 13:12:58,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:12:58,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:12:58,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 13:12:58,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:12:58,438 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:12:58,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:12:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:12:58,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717087368] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:12:58,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:12:58,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 16 [2023-08-27 13:12:58,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487809763] [2023-08-27 13:12:58,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:12:58,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 13:12:58,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:12:58,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 13:12:58,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-08-27 13:12:58,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 253 [2023-08-27 13:12:58,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 1986 transitions, 53438 flow. Second operand has 18 states, 18 states have (on average 98.38888888888889) internal successors, (1771), 18 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:12:58,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:12:58,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 253 [2023-08-27 13:12:58,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:13:21,455 INFO L124 PetriNetUnfolderBase]: 17528/31896 cut-off events. [2023-08-27 13:13:21,455 INFO L125 PetriNetUnfolderBase]: For 903658/903658 co-relation queries the response was YES. [2023-08-27 13:13:21,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301515 conditions, 31896 events. 17528/31896 cut-off events. For 903658/903658 co-relation queries the response was YES. Maximal size of possible extension queue 2110. Compared 297609 event pairs, 1122 based on Foata normal form. 77/31973 useless extension candidates. Maximal degree in co-relation 301419. Up to 14068 conditions per place. [2023-08-27 13:13:22,101 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 942 selfloop transitions, 1956 changer transitions 32/2930 dead transitions. [2023-08-27 13:13:22,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 2930 transitions, 84383 flow [2023-08-27 13:13:22,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-27 13:13:22,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-27 13:13:22,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3087 transitions. [2023-08-27 13:13:22,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4067193675889328 [2023-08-27 13:13:22,105 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3087 transitions. [2023-08-27 13:13:22,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3087 transitions. [2023-08-27 13:13:22,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:13:22,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3087 transitions. [2023-08-27 13:13:22,110 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 102.9) internal successors, (3087), 30 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:13:22,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 253.0) internal successors, (7843), 31 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:13:22,116 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 253.0) internal successors, (7843), 31 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:13:22,117 INFO L175 Difference]: Start difference. First operand has 235 places, 1986 transitions, 53438 flow. Second operand 30 states and 3087 transitions. [2023-08-27 13:13:22,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 2930 transitions, 84383 flow [2023-08-27 13:13:39,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 2930 transitions, 83905 flow, removed 171 selfloop flow, removed 2 redundant places. [2023-08-27 13:13:39,683 INFO L231 Difference]: Finished difference. Result has 276 places, 2731 transitions, 83658 flow [2023-08-27 13:13:39,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=53217, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1986, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=83658, PETRI_PLACES=276, PETRI_TRANSITIONS=2731} [2023-08-27 13:13:39,685 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 251 predicate places. [2023-08-27 13:13:39,685 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 2731 transitions, 83658 flow [2023-08-27 13:13:39,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 98.38888888888889) internal successors, (1771), 18 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:13:39,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:13:39,686 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:13:39,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-27 13:13:39,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:13:39,891 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:13:39,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:13:39,892 INFO L85 PathProgramCache]: Analyzing trace with hash -336726385, now seen corresponding path program 9 times [2023-08-27 13:13:39,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:13:39,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667223555] [2023-08-27 13:13:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:13:39,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:13:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:13:40,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:13:40,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:13:40,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667223555] [2023-08-27 13:13:40,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667223555] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:13:40,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885125587] [2023-08-27 13:13:40,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:13:40,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:13:40,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:13:40,265 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 13:13:40,300 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 13:13:40,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 13:13:40,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:13:40,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 13:13:40,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:13:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:13:40,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:13:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:13:41,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885125587] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:13:41,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:13:41,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 16 [2023-08-27 13:13:41,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807724876] [2023-08-27 13:13:41,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:13:41,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 13:13:41,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:13:41,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 13:13:41,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-08-27 13:13:41,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 253 [2023-08-27 13:13:41,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 2731 transitions, 83658 flow. Second operand has 18 states, 18 states have (on average 98.38888888888889) internal successors, (1771), 18 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:13:41,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:13:41,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 253 [2023-08-27 13:13:41,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:14:12,670 INFO L124 PetriNetUnfolderBase]: 20402/37211 cut-off events. [2023-08-27 13:14:12,670 INFO L125 PetriNetUnfolderBase]: For 1222896/1222896 co-relation queries the response was YES. [2023-08-27 13:14:13,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 378995 conditions, 37211 events. 20402/37211 cut-off events. For 1222896/1222896 co-relation queries the response was YES. Maximal size of possible extension queue 2600. Compared 356290 event pairs, 1595 based on Foata normal form. 61/37272 useless extension candidates. Maximal degree in co-relation 378885. Up to 18526 conditions per place. [2023-08-27 13:14:13,596 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 1173 selfloop transitions, 2420 changer transitions 45/3638 dead transitions. [2023-08-27 13:14:13,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 3638 transitions, 118489 flow [2023-08-27 13:14:13,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 13:14:13,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 13:14:13,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2775 transitions. [2023-08-27 13:14:13,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4062362758014932 [2023-08-27 13:14:13,600 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2775 transitions. [2023-08-27 13:14:13,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2775 transitions. [2023-08-27 13:14:13,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:14:13,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2775 transitions. [2023-08-27 13:14:13,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 102.77777777777777) internal successors, (2775), 27 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:14:13,609 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 253.0) internal successors, (7084), 28 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:14:13,610 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 253.0) internal successors, (7084), 28 states have internal predecessors, (7084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:14:13,610 INFO L175 Difference]: Start difference. First operand has 276 places, 2731 transitions, 83658 flow. Second operand 27 states and 2775 transitions. [2023-08-27 13:14:13,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 3638 transitions, 118489 flow [2023-08-27 13:14:45,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 3638 transitions, 113892 flow, removed 2276 selfloop flow, removed 7 redundant places. [2023-08-27 13:14:45,605 INFO L231 Difference]: Finished difference. Result has 310 places, 3426 transitions, 111929 flow [2023-08-27 13:14:45,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=80936, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1765, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=857, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=111929, PETRI_PLACES=310, PETRI_TRANSITIONS=3426} [2023-08-27 13:14:45,608 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 285 predicate places. [2023-08-27 13:14:45,608 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 3426 transitions, 111929 flow [2023-08-27 13:14:45,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 98.38888888888889) internal successors, (1771), 18 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:14:45,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:14:45,608 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:14:45,617 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 13:14:45,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:14:45,814 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:14:45,814 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:14:45,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1400409185, now seen corresponding path program 10 times [2023-08-27 13:14:45,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:14:45,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468441206] [2023-08-27 13:14:45,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:14:45,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:14:45,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:14:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:14:45,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:14:45,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468441206] [2023-08-27 13:14:45,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468441206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 13:14:45,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 13:14:45,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 13:14:45,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923401829] [2023-08-27 13:14:45,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 13:14:45,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 13:14:45,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:14:45,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 13:14:45,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 13:14:45,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 253 [2023-08-27 13:14:45,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 3426 transitions, 111929 flow. Second operand has 5 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:14:45,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:14:45,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 253 [2023-08-27 13:14:45,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:15:13,640 INFO L124 PetriNetUnfolderBase]: 12354/23321 cut-off events. [2023-08-27 13:15:13,641 INFO L125 PetriNetUnfolderBase]: For 822432/822432 co-relation queries the response was YES. [2023-08-27 13:15:14,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249022 conditions, 23321 events. 12354/23321 cut-off events. For 822432/822432 co-relation queries the response was YES. Maximal size of possible extension queue 1413. Compared 213949 event pairs, 3416 based on Foata normal form. 902/24223 useless extension candidates. Maximal degree in co-relation 248910. Up to 11424 conditions per place. [2023-08-27 13:15:14,100 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 1025 selfloop transitions, 824 changer transitions 425/2274 dead transitions. [2023-08-27 13:15:14,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 2274 transitions, 78766 flow [2023-08-27 13:15:14,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 13:15:14,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 13:15:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-08-27 13:15:14,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46936758893280633 [2023-08-27 13:15:14,101 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-08-27 13:15:14,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-08-27 13:15:14,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:15:14,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-08-27 13:15:14,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:15:14,103 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:15:14,103 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:15:14,103 INFO L175 Difference]: Start difference. First operand has 310 places, 3426 transitions, 111929 flow. Second operand 4 states and 475 transitions. [2023-08-27 13:15:14,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 2274 transitions, 78766 flow [2023-08-27 13:15:30,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 2274 transitions, 75549 flow, removed 1547 selfloop flow, removed 13 redundant places. [2023-08-27 13:15:30,421 INFO L231 Difference]: Finished difference. Result has 294 places, 1725 transitions, 55904 flow [2023-08-27 13:15:30,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=63553, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2034, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=752, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=55904, PETRI_PLACES=294, PETRI_TRANSITIONS=1725} [2023-08-27 13:15:30,423 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 269 predicate places. [2023-08-27 13:15:30,423 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 1725 transitions, 55904 flow [2023-08-27 13:15:30,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.4) internal successors, (567), 5 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:15:30,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:15:30,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:15:30,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-08-27 13:15:30,423 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:15:30,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:15:30,424 INFO L85 PathProgramCache]: Analyzing trace with hash -380202459, now seen corresponding path program 11 times [2023-08-27 13:15:30,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:15:30,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990430726] [2023-08-27 13:15:30,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:15:30,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:15:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:15:30,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:15:30,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:15:30,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990430726] [2023-08-27 13:15:30,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990430726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:15:30,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665388908] [2023-08-27 13:15:30,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:15:30,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:15:30,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:15:30,467 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 13:15:30,470 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 13:15:30,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:15:30,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:15:30,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 13:15:30,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:15:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:15:30,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:15:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:15:30,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665388908] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:15:30,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:15:30,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-08-27 13:15:30,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361486902] [2023-08-27 13:15:30,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:15:30,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 13:15:30,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:15:30,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 13:15:30,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-08-27 13:15:30,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 253 [2023-08-27 13:15:30,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 1725 transitions, 55904 flow. Second operand has 8 states, 8 states have (on average 112.875) internal successors, (903), 8 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:15:30,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:15:30,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 253 [2023-08-27 13:15:30,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:15:40,036 INFO L124 PetriNetUnfolderBase]: 8149/15064 cut-off events. [2023-08-27 13:15:40,037 INFO L125 PetriNetUnfolderBase]: For 561209/561209 co-relation queries the response was YES. [2023-08-27 13:15:40,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152962 conditions, 15064 events. 8149/15064 cut-off events. For 561209/561209 co-relation queries the response was YES. Maximal size of possible extension queue 743. Compared 124721 event pairs, 784 based on Foata normal form. 272/15336 useless extension candidates. Maximal degree in co-relation 152860. Up to 11404 conditions per place. [2023-08-27 13:15:40,274 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 755 selfloop transitions, 711 changer transitions 22/1488 dead transitions. [2023-08-27 13:15:40,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 1488 transitions, 49768 flow [2023-08-27 13:15:40,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 13:15:40,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 13:15:40,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 591 transitions. [2023-08-27 13:15:40,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671936758893281 [2023-08-27 13:15:40,275 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 591 transitions. [2023-08-27 13:15:40,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 591 transitions. [2023-08-27 13:15:40,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:15:40,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 591 transitions. [2023-08-27 13:15:40,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:15:40,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:15:40,277 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 253.0) internal successors, (1518), 6 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:15:40,277 INFO L175 Difference]: Start difference. First operand has 294 places, 1725 transitions, 55904 flow. Second operand 5 states and 591 transitions. [2023-08-27 13:15:40,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 1488 transitions, 49768 flow [2023-08-27 13:15:46,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 1488 transitions, 47675 flow, removed 223 selfloop flow, removed 15 redundant places. [2023-08-27 13:15:46,895 INFO L231 Difference]: Finished difference. Result has 268 places, 1395 transitions, 43751 flow [2023-08-27 13:15:46,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=42747, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=709, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=694, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=43751, PETRI_PLACES=268, PETRI_TRANSITIONS=1395} [2023-08-27 13:15:46,896 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 243 predicate places. [2023-08-27 13:15:46,896 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 1395 transitions, 43751 flow [2023-08-27 13:15:46,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 112.875) internal successors, (903), 8 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:15:46,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:15:46,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:15:46,907 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 13:15:47,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:15:47,102 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:15:47,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:15:47,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1704695308, now seen corresponding path program 12 times [2023-08-27 13:15:47,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:15:47,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285773931] [2023-08-27 13:15:47,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:15:47,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:15:47,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:15:47,154 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 13:15:47,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:15:47,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285773931] [2023-08-27 13:15:47,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285773931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:15:47,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592276326] [2023-08-27 13:15:47,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 13:15:47,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:15:47,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:15:47,156 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 13:15:47,179 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 13:15:47,239 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 13:15:47,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:15:47,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 13:15:47,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:15:47,320 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 13:15:47,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:15:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 13:15:47,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592276326] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:15:47,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:15:47,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-27 13:15:47,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900536051] [2023-08-27 13:15:47,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:15:47,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 13:15:47,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:15:47,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 13:15:47,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-08-27 13:15:47,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 253 [2023-08-27 13:15:47,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 1395 transitions, 43751 flow. Second operand has 11 states, 11 states have (on average 109.81818181818181) internal successors, (1208), 11 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:15:47,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:15:47,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 253 [2023-08-27 13:15:47,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:15:55,733 INFO L124 PetriNetUnfolderBase]: 8773/16219 cut-off events. [2023-08-27 13:15:55,733 INFO L125 PetriNetUnfolderBase]: For 539139/539139 co-relation queries the response was YES. [2023-08-27 13:15:55,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163731 conditions, 16219 events. 8773/16219 cut-off events. For 539139/539139 co-relation queries the response was YES. Maximal size of possible extension queue 796. Compared 135778 event pairs, 1066 based on Foata normal form. 552/16771 useless extension candidates. Maximal degree in co-relation 163636. Up to 13454 conditions per place. [2023-08-27 13:15:55,912 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 1399 selfloop transitions, 214 changer transitions 0/1613 dead transitions. [2023-08-27 13:15:55,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 1613 transitions, 52281 flow [2023-08-27 13:15:55,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 13:15:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 13:15:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1480 transitions. [2023-08-27 13:15:55,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44998479781088474 [2023-08-27 13:15:55,914 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1480 transitions. [2023-08-27 13:15:55,915 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1480 transitions. [2023-08-27 13:15:55,915 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:15:55,915 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1480 transitions. [2023-08-27 13:15:55,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 113.84615384615384) internal successors, (1480), 13 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:15:55,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 253.0) internal successors, (3542), 14 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:15:55,919 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 253.0) internal successors, (3542), 14 states have internal predecessors, (3542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:15:55,920 INFO L175 Difference]: Start difference. First operand has 268 places, 1395 transitions, 43751 flow. Second operand 13 states and 1480 transitions. [2023-08-27 13:15:55,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 1613 transitions, 52281 flow [2023-08-27 13:16:02,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 1613 transitions, 51273 flow, removed 106 selfloop flow, removed 2 redundant places. [2023-08-27 13:16:02,142 INFO L231 Difference]: Finished difference. Result has 285 places, 1462 transitions, 45849 flow [2023-08-27 13:16:02,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=41715, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=45849, PETRI_PLACES=285, PETRI_TRANSITIONS=1462} [2023-08-27 13:16:02,143 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 260 predicate places. [2023-08-27 13:16:02,143 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 1462 transitions, 45849 flow [2023-08-27 13:16:02,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 109.81818181818181) internal successors, (1208), 11 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:02,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:16:02,144 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:16:02,150 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 13:16:02,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 13:16:02,345 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:16:02,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:16:02,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1488054718, now seen corresponding path program 13 times [2023-08-27 13:16:02,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:16:02,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669789804] [2023-08-27 13:16:02,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:16:02,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:16:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:16:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 13:16:02,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:16:02,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669789804] [2023-08-27 13:16:02,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669789804] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:16:02,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567499305] [2023-08-27 13:16:02,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 13:16:02,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:16:02,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:16:02,395 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 13:16:02,397 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 13:16:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:16:02,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 13:16:02,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:16:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 13:16:02,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:16:02,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 13:16:02,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567499305] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:16:02,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:16:02,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2023-08-27 13:16:02,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948902118] [2023-08-27 13:16:02,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:16:02,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 13:16:02,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:16:02,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 13:16:02,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-08-27 13:16:02,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 253 [2023-08-27 13:16:02,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 1462 transitions, 45849 flow. Second operand has 10 states, 10 states have (on average 109.7) internal successors, (1097), 10 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:02,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:16:02,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 253 [2023-08-27 13:16:02,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:16:10,611 INFO L124 PetriNetUnfolderBase]: 8983/16787 cut-off events. [2023-08-27 13:16:10,611 INFO L125 PetriNetUnfolderBase]: For 599008/599008 co-relation queries the response was YES. [2023-08-27 13:16:10,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176137 conditions, 16787 events. 8983/16787 cut-off events. For 599008/599008 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 143148 event pairs, 442 based on Foata normal form. 54/16841 useless extension candidates. Maximal degree in co-relation 176035. Up to 8782 conditions per place. [2023-08-27 13:16:10,822 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 1442 selfloop transitions, 166 changer transitions 8/1616 dead transitions. [2023-08-27 13:16:10,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 1616 transitions, 51385 flow [2023-08-27 13:16:10,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 13:16:10,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 13:16:10,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1681 transitions. [2023-08-27 13:16:10,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4429512516469038 [2023-08-27 13:16:10,824 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1681 transitions. [2023-08-27 13:16:10,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1681 transitions. [2023-08-27 13:16:10,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:16:10,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1681 transitions. [2023-08-27 13:16:10,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 112.06666666666666) internal successors, (1681), 15 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:10,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 253.0) internal successors, (4048), 16 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:10,829 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 253.0) internal successors, (4048), 16 states have internal predecessors, (4048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:10,829 INFO L175 Difference]: Start difference. First operand has 285 places, 1462 transitions, 45849 flow. Second operand 15 states and 1681 transitions. [2023-08-27 13:16:10,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 1616 transitions, 51385 flow [2023-08-27 13:16:17,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 1616 transitions, 50480 flow, removed 388 selfloop flow, removed 6 redundant places. [2023-08-27 13:16:17,805 INFO L231 Difference]: Finished difference. Result has 297 places, 1473 transitions, 44898 flow [2023-08-27 13:16:17,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=42925, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=44898, PETRI_PLACES=297, PETRI_TRANSITIONS=1473} [2023-08-27 13:16:17,806 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 272 predicate places. [2023-08-27 13:16:17,807 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 1473 transitions, 44898 flow [2023-08-27 13:16:17,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 109.7) internal successors, (1097), 10 states have internal predecessors, (1097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:17,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:16:17,807 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:16:17,815 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 13:16:18,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:16:18,013 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:16:18,013 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:16:18,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1464250904, now seen corresponding path program 14 times [2023-08-27 13:16:18,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:16:18,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933675789] [2023-08-27 13:16:18,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:16:18,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:16:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:16:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:16:18,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:16:18,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933675789] [2023-08-27 13:16:18,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933675789] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:16:18,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395644790] [2023-08-27 13:16:18,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:16:18,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:16:18,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:16:18,085 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 13:16:18,088 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 13:16:18,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:16:18,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:16:18,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 13:16:18,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:16:18,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:16:18,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:16:18,284 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:16:18,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395644790] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:16:18,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:16:18,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-27 13:16:18,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092035935] [2023-08-27 13:16:18,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:16:18,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 13:16:18,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:16:18,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 13:16:18,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-27 13:16:18,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 253 [2023-08-27 13:16:18,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 1473 transitions, 44898 flow. Second operand has 11 states, 11 states have (on average 109.36363636363636) internal successors, (1203), 11 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:18,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:16:18,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 253 [2023-08-27 13:16:18,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:16:26,951 INFO L124 PetriNetUnfolderBase]: 9333/17732 cut-off events. [2023-08-27 13:16:26,952 INFO L125 PetriNetUnfolderBase]: For 684363/684363 co-relation queries the response was YES. [2023-08-27 13:16:27,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184991 conditions, 17732 events. 9333/17732 cut-off events. For 684363/684363 co-relation queries the response was YES. Maximal size of possible extension queue 910. Compared 155797 event pairs, 536 based on Foata normal form. 376/18108 useless extension candidates. Maximal degree in co-relation 184886. Up to 5689 conditions per place. [2023-08-27 13:16:27,333 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 1234 selfloop transitions, 381 changer transitions 42/1657 dead transitions. [2023-08-27 13:16:27,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 1657 transitions, 48262 flow [2023-08-27 13:16:27,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 13:16:27,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 13:16:27,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1353 transitions. [2023-08-27 13:16:27,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44565217391304346 [2023-08-27 13:16:27,335 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1353 transitions. [2023-08-27 13:16:27,335 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1353 transitions. [2023-08-27 13:16:27,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:16:27,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1353 transitions. [2023-08-27 13:16:27,337 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 112.75) internal successors, (1353), 12 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:27,339 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 253.0) internal successors, (3289), 13 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:27,339 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 253.0) internal successors, (3289), 13 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:27,339 INFO L175 Difference]: Start difference. First operand has 297 places, 1473 transitions, 44898 flow. Second operand 12 states and 1353 transitions. [2023-08-27 13:16:27,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 1657 transitions, 48262 flow [2023-08-27 13:16:34,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 1657 transitions, 47582 flow, removed 320 selfloop flow, removed 4 redundant places. [2023-08-27 13:16:34,965 INFO L231 Difference]: Finished difference. Result has 310 places, 1310 transitions, 38719 flow [2023-08-27 13:16:34,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=36840, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=920, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=38719, PETRI_PLACES=310, PETRI_TRANSITIONS=1310} [2023-08-27 13:16:34,967 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 285 predicate places. [2023-08-27 13:16:34,967 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 1310 transitions, 38719 flow [2023-08-27 13:16:34,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 109.36363636363636) internal successors, (1203), 11 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:34,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:16:34,968 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:16:34,976 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 13:16:35,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:16:35,176 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:16:35,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:16:35,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1416075938, now seen corresponding path program 15 times [2023-08-27 13:16:35,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:16:35,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37204806] [2023-08-27 13:16:35,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:16:35,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:16:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:16:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:16:35,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:16:35,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37204806] [2023-08-27 13:16:35,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37204806] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:16:35,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580819172] [2023-08-27 13:16:35,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:16:35,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:16:35,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:16:35,228 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 13:16:35,269 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 13:16:35,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-27 13:16:35,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:16:35,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 13:16:35,400 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:16:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:16:35,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:16:35,494 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:16:35,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580819172] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:16:35,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:16:35,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2023-08-27 13:16:35,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326605267] [2023-08-27 13:16:35,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:16:35,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-08-27 13:16:35,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:16:35,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-08-27 13:16:35,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2023-08-27 13:16:35,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 253 [2023-08-27 13:16:35,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 1310 transitions, 38719 flow. Second operand has 10 states, 10 states have (on average 109.8) internal successors, (1098), 10 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:35,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:16:35,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 253 [2023-08-27 13:16:35,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:16:43,304 INFO L124 PetriNetUnfolderBase]: 8916/16657 cut-off events. [2023-08-27 13:16:43,304 INFO L125 PetriNetUnfolderBase]: For 669927/669927 co-relation queries the response was YES. [2023-08-27 13:16:43,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178431 conditions, 16657 events. 8916/16657 cut-off events. For 669927/669927 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 141522 event pairs, 648 based on Foata normal form. 558/17215 useless extension candidates. Maximal degree in co-relation 178321. Up to 7514 conditions per place. [2023-08-27 13:16:43,530 INFO L140 encePairwiseOnDemand]: 248/253 looper letters, 1014 selfloop transitions, 501 changer transitions 0/1515 dead transitions. [2023-08-27 13:16:43,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 1515 transitions, 46452 flow [2023-08-27 13:16:43,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 13:16:43,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 13:16:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1250 transitions. [2023-08-27 13:16:43,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44915558749550843 [2023-08-27 13:16:43,533 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1250 transitions. [2023-08-27 13:16:43,533 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1250 transitions. [2023-08-27 13:16:43,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:16:43,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1250 transitions. [2023-08-27 13:16:43,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 113.63636363636364) internal successors, (1250), 11 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:43,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 253.0) internal successors, (3036), 12 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:43,538 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 253.0) internal successors, (3036), 12 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:43,539 INFO L175 Difference]: Start difference. First operand has 310 places, 1310 transitions, 38719 flow. Second operand 11 states and 1250 transitions. [2023-08-27 13:16:43,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 1515 transitions, 46452 flow [2023-08-27 13:16:52,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 1515 transitions, 45551 flow, removed 410 selfloop flow, removed 5 redundant places. [2023-08-27 13:16:52,783 INFO L231 Difference]: Finished difference. Result has 319 places, 1341 transitions, 40646 flow [2023-08-27 13:16:52,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=37368, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=453, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=40646, PETRI_PLACES=319, PETRI_TRANSITIONS=1341} [2023-08-27 13:16:52,784 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 294 predicate places. [2023-08-27 13:16:52,785 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 1341 transitions, 40646 flow [2023-08-27 13:16:52,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 109.8) internal successors, (1098), 10 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:52,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:16:52,785 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:16:52,790 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 13:16:52,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:16:52,986 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:16:52,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:16:52,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1425719374, now seen corresponding path program 4 times [2023-08-27 13:16:52,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:16:52,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064328323] [2023-08-27 13:16:52,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:16:52,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:16:52,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:16:53,049 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 13:16:53,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:16:53,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064328323] [2023-08-27 13:16:53,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064328323] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:16:53,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158747840] [2023-08-27 13:16:53,050 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:16:53,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:16:53,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:16:53,051 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 13:16:53,081 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 13:16:53,135 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:16:53,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:16:53,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 13:16:53,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:16:53,231 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 13:16:53,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:16:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:16:53,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158747840] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:16:53,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:16:53,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 12 [2023-08-27 13:16:53,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592211671] [2023-08-27 13:16:53,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:16:53,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 13:16:53,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:16:53,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 13:16:53,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-08-27 13:16:53,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 253 [2023-08-27 13:16:53,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 1341 transitions, 40646 flow. Second operand has 13 states, 13 states have (on average 109.0) internal successors, (1417), 13 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:16:53,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:16:53,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 253 [2023-08-27 13:16:53,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:17:02,923 INFO L124 PetriNetUnfolderBase]: 10667/19790 cut-off events. [2023-08-27 13:17:02,923 INFO L125 PetriNetUnfolderBase]: For 806860/806860 co-relation queries the response was YES. [2023-08-27 13:17:03,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220398 conditions, 19790 events. 10667/19790 cut-off events. For 806860/806860 co-relation queries the response was YES. Maximal size of possible extension queue 1019. Compared 171144 event pairs, 1116 based on Foata normal form. 206/19996 useless extension candidates. Maximal degree in co-relation 220286. Up to 7091 conditions per place. [2023-08-27 13:17:03,441 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 899 selfloop transitions, 1053 changer transitions 0/1952 dead transitions. [2023-08-27 13:17:03,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1952 transitions, 60184 flow [2023-08-27 13:17:03,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 13:17:03,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 13:17:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2599 transitions. [2023-08-27 13:17:03,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44664031620553357 [2023-08-27 13:17:03,445 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2599 transitions. [2023-08-27 13:17:03,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2599 transitions. [2023-08-27 13:17:03,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:17:03,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2599 transitions. [2023-08-27 13:17:03,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 113.0) internal successors, (2599), 23 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:17:03,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 253.0) internal successors, (6072), 24 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:17:03,453 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 253.0) internal successors, (6072), 24 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:17:03,453 INFO L175 Difference]: Start difference. First operand has 319 places, 1341 transitions, 40646 flow. Second operand 23 states and 2599 transitions. [2023-08-27 13:17:03,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1952 transitions, 60184 flow [2023-08-27 13:17:14,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1952 transitions, 59857 flow, removed 102 selfloop flow, removed 5 redundant places. [2023-08-27 13:17:14,633 INFO L231 Difference]: Finished difference. Result has 351 places, 1630 transitions, 54788 flow [2023-08-27 13:17:14,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=40316, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=787, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=54788, PETRI_PLACES=351, PETRI_TRANSITIONS=1630} [2023-08-27 13:17:14,635 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 326 predicate places. [2023-08-27 13:17:14,635 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 1630 transitions, 54788 flow [2023-08-27 13:17:14,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 109.0) internal successors, (1417), 13 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:17:14,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:17:14,635 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:17:14,643 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 13:17:14,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:17:14,841 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:17:14,841 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:17:14,841 INFO L85 PathProgramCache]: Analyzing trace with hash 829778184, now seen corresponding path program 5 times [2023-08-27 13:17:14,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:17:14,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380632566] [2023-08-27 13:17:14,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:17:14,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:17:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:17:14,906 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:17:14,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:17:14,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380632566] [2023-08-27 13:17:14,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380632566] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:17:14,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510435481] [2023-08-27 13:17:14,907 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:17:14,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:17:14,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:17:14,909 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 13:17:14,932 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 13:17:14,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 13:17:14,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:17:14,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 13:17:14,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:17:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:17:15,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:17:15,203 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:17:15,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510435481] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:17:15,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:17:15,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 12 [2023-08-27 13:17:15,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961767258] [2023-08-27 13:17:15,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:17:15,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 13:17:15,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:17:15,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 13:17:15,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-08-27 13:17:15,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 253 [2023-08-27 13:17:15,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 1630 transitions, 54788 flow. Second operand has 13 states, 13 states have (on average 109.07692307692308) internal successors, (1418), 13 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:17:15,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:17:15,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 253 [2023-08-27 13:17:15,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:17:26,548 INFO L124 PetriNetUnfolderBase]: 10405/19351 cut-off events. [2023-08-27 13:17:26,548 INFO L125 PetriNetUnfolderBase]: For 922889/922889 co-relation queries the response was YES. [2023-08-27 13:17:26,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227237 conditions, 19351 events. 10405/19351 cut-off events. For 922889/922889 co-relation queries the response was YES. Maximal size of possible extension queue 1011. Compared 168248 event pairs, 388 based on Foata normal form. 124/19475 useless extension candidates. Maximal degree in co-relation 227111. Up to 5962 conditions per place. [2023-08-27 13:17:26,832 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 1452 selfloop transitions, 695 changer transitions 14/2161 dead transitions. [2023-08-27 13:17:26,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 2161 transitions, 68321 flow [2023-08-27 13:17:26,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 13:17:26,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 13:17:26,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2804 transitions. [2023-08-27 13:17:26,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4433201581027668 [2023-08-27 13:17:26,835 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2804 transitions. [2023-08-27 13:17:26,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2804 transitions. [2023-08-27 13:17:26,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:17:26,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2804 transitions. [2023-08-27 13:17:26,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 112.16) internal successors, (2804), 25 states have internal predecessors, (2804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:17:26,843 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 253.0) internal successors, (6578), 26 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:17:26,844 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 253.0) internal successors, (6578), 26 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:17:26,844 INFO L175 Difference]: Start difference. First operand has 351 places, 1630 transitions, 54788 flow. Second operand 25 states and 2804 transitions. [2023-08-27 13:17:26,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 2161 transitions, 68321 flow [2023-08-27 13:17:39,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 2161 transitions, 67438 flow, removed 392 selfloop flow, removed 4 redundant places. [2023-08-27 13:17:39,273 INFO L231 Difference]: Finished difference. Result has 375 places, 1641 transitions, 56300 flow [2023-08-27 13:17:39,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=53310, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=669, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=941, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=56300, PETRI_PLACES=375, PETRI_TRANSITIONS=1641} [2023-08-27 13:17:39,274 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 350 predicate places. [2023-08-27 13:17:39,274 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 1641 transitions, 56300 flow [2023-08-27 13:17:39,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 109.07692307692308) internal successors, (1418), 13 states have internal predecessors, (1418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:17:39,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:17:39,275 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:17:39,280 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 13:17:39,475 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,SelfDestructingSolverStorable33 [2023-08-27 13:17:39,475 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:17:39,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:17:39,476 INFO L85 PathProgramCache]: Analyzing trace with hash -518526167, now seen corresponding path program 16 times [2023-08-27 13:17:39,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:17:39,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125311880] [2023-08-27 13:17:39,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:17:39,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:17:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:17:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:17:39,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:17:39,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125311880] [2023-08-27 13:17:39,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125311880] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:17:39,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981032236] [2023-08-27 13:17:39,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 13:17:39,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:17:39,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:17:39,890 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 13:17:39,894 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 13:17:40,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 13:17:40,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:17:40,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 13:17:40,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:17:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:17:40,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:17:57,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 3 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 13:17:57,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981032236] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:17:57,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:17:57,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 6] total 23 [2023-08-27 13:17:57,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956053299] [2023-08-27 13:17:57,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:17:57,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 13:17:57,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:17:57,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 13:17:57,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=495, Unknown=3, NotChecked=0, Total=600 [2023-08-27 13:17:57,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 253 [2023-08-27 13:17:57,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1641 transitions, 56300 flow. Second operand has 25 states, 25 states have (on average 98.04) internal successors, (2451), 25 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:17:57,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:17:57,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 253 [2023-08-27 13:17:57,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:18:17,172 INFO L124 PetriNetUnfolderBase]: 11542/21535 cut-off events. [2023-08-27 13:18:17,172 INFO L125 PetriNetUnfolderBase]: For 1084921/1084921 co-relation queries the response was YES. [2023-08-27 13:18:17,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261454 conditions, 21535 events. 11542/21535 cut-off events. For 1084921/1084921 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 189245 event pairs, 1192 based on Foata normal form. 25/21560 useless extension candidates. Maximal degree in co-relation 261323. Up to 19237 conditions per place. [2023-08-27 13:18:17,624 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 1675 selfloop transitions, 274 changer transitions 32/1981 dead transitions. [2023-08-27 13:18:17,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 1981 transitions, 69549 flow [2023-08-27 13:18:17,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-27 13:18:17,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-27 13:18:17,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3065 transitions. [2023-08-27 13:18:17,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4038208168642951 [2023-08-27 13:18:17,627 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3065 transitions. [2023-08-27 13:18:17,627 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3065 transitions. [2023-08-27 13:18:17,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:18:17,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3065 transitions. [2023-08-27 13:18:17,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 102.16666666666667) internal successors, (3065), 30 states have internal predecessors, (3065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:18:17,635 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 253.0) internal successors, (7843), 31 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:18:17,636 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 253.0) internal successors, (7843), 31 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:18:17,636 INFO L175 Difference]: Start difference. First operand has 375 places, 1641 transitions, 56300 flow. Second operand 30 states and 3065 transitions. [2023-08-27 13:18:17,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 1981 transitions, 69549 flow [2023-08-27 13:18:37,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 1981 transitions, 67677 flow, removed 454 selfloop flow, removed 10 redundant places. [2023-08-27 13:18:37,748 INFO L231 Difference]: Finished difference. Result has 404 places, 1821 transitions, 62571 flow [2023-08-27 13:18:37,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=54664, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=62571, PETRI_PLACES=404, PETRI_TRANSITIONS=1821} [2023-08-27 13:18:37,749 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 379 predicate places. [2023-08-27 13:18:37,750 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 1821 transitions, 62571 flow [2023-08-27 13:18:37,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.04) internal successors, (2451), 25 states have internal predecessors, (2451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:18:37,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:18:37,750 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:18:37,755 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 13:18:37,950 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,SelfDestructingSolverStorable34 [2023-08-27 13:18:37,951 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:18:37,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:18:37,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1550726559, now seen corresponding path program 17 times [2023-08-27 13:18:37,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:18:37,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117812571] [2023-08-27 13:18:37,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:18:37,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:18:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:18:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:18:38,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:18:38,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117812571] [2023-08-27 13:18:38,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117812571] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:18:38,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192712517] [2023-08-27 13:18:38,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 13:18:38,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:18:38,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:18:38,409 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 13:18:38,413 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 13:18:38,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-27 13:18:38,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:18:38,597 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 13:18:38,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:18:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:18:38,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:18:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:18:39,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192712517] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:18:39,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:18:39,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-27 13:18:39,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124794566] [2023-08-27 13:18:39,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:18:39,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 13:18:39,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:18:39,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 13:18:39,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2023-08-27 13:18:39,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 253 [2023-08-27 13:18:39,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 1821 transitions, 62571 flow. Second operand has 28 states, 28 states have (on average 97.85714285714286) internal successors, (2740), 28 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:18:39,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:18:39,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 253 [2023-08-27 13:18:39,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:19:07,212 INFO L124 PetriNetUnfolderBase]: 14076/25788 cut-off events. [2023-08-27 13:19:07,213 INFO L125 PetriNetUnfolderBase]: For 1288778/1288778 co-relation queries the response was YES. [2023-08-27 13:19:07,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310202 conditions, 25788 events. 14076/25788 cut-off events. For 1288778/1288778 co-relation queries the response was YES. Maximal size of possible extension queue 1270. Compared 227537 event pairs, 868 based on Foata normal form. 24/25812 useless extension candidates. Maximal degree in co-relation 310062. Up to 8172 conditions per place. [2023-08-27 13:19:07,731 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 714 selfloop transitions, 1837 changer transitions 51/2602 dead transitions. [2023-08-27 13:19:07,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 2602 transitions, 90566 flow [2023-08-27 13:19:07,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-27 13:19:07,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-27 13:19:07,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4987 transitions. [2023-08-27 13:19:07,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40227474388965073 [2023-08-27 13:19:07,735 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4987 transitions. [2023-08-27 13:19:07,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4987 transitions. [2023-08-27 13:19:07,736 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:19:07,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4987 transitions. [2023-08-27 13:19:07,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 101.77551020408163) internal successors, (4987), 49 states have internal predecessors, (4987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:19:07,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 253.0) internal successors, (12650), 50 states have internal predecessors, (12650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:19:07,749 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 253.0) internal successors, (12650), 50 states have internal predecessors, (12650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:19:07,749 INFO L175 Difference]: Start difference. First operand has 404 places, 1821 transitions, 62571 flow. Second operand 49 states and 4987 transitions. [2023-08-27 13:19:07,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 2602 transitions, 90566 flow [2023-08-27 13:19:29,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 2602 transitions, 89886 flow, removed 332 selfloop flow, removed 5 redundant places. [2023-08-27 13:19:29,989 INFO L231 Difference]: Finished difference. Result has 458 places, 2349 transitions, 86379 flow [2023-08-27 13:19:29,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=61899, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1821, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=86379, PETRI_PLACES=458, PETRI_TRANSITIONS=2349} [2023-08-27 13:19:29,991 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 433 predicate places. [2023-08-27 13:19:29,991 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 2349 transitions, 86379 flow [2023-08-27 13:19:29,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 97.85714285714286) internal successors, (2740), 28 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:19:29,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:19:29,991 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:19:29,996 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 13:19:30,192 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,SelfDestructingSolverStorable35 [2023-08-27 13:19:30,192 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:19:30,193 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:19:30,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1048385895, now seen corresponding path program 18 times [2023-08-27 13:19:30,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:19:30,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785584877] [2023-08-27 13:19:30,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:19:30,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:19:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:19:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:19:30,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:19:30,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785584877] [2023-08-27 13:19:30,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785584877] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:19:30,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242464894] [2023-08-27 13:19:30,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 13:19:30,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:19:30,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:19:30,529 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 13:19:30,533 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 13:19:30,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 13:19:30,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:19:30,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 13:19:30,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:19:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:19:31,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:19:31,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:19:31,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242464894] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:19:31,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:19:31,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-27 13:19:31,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942548422] [2023-08-27 13:19:31,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:19:31,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 13:19:31,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:19:31,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 13:19:31,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2023-08-27 13:19:31,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 253 [2023-08-27 13:19:31,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 2349 transitions, 86379 flow. Second operand has 22 states, 22 states have (on average 98.45454545454545) internal successors, (2166), 22 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:19:31,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:19:31,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 253 [2023-08-27 13:19:31,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:19:35,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-27 13:19:57,393 INFO L124 PetriNetUnfolderBase]: 15230/28082 cut-off events. [2023-08-27 13:19:57,394 INFO L125 PetriNetUnfolderBase]: For 1497884/1497884 co-relation queries the response was YES. [2023-08-27 13:19:58,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352235 conditions, 28082 events. 15230/28082 cut-off events. For 1497884/1497884 co-relation queries the response was YES. Maximal size of possible extension queue 1457. Compared 253714 event pairs, 1106 based on Foata normal form. 24/28106 useless extension candidates. Maximal degree in co-relation 352083. Up to 18010 conditions per place. [2023-08-27 13:19:58,134 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 1334 selfloop transitions, 1465 changer transitions 24/2823 dead transitions. [2023-08-27 13:19:58,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 2823 transitions, 106530 flow [2023-08-27 13:19:58,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 13:19:58,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 13:19:58,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2574 transitions. [2023-08-27 13:19:58,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40695652173913044 [2023-08-27 13:19:58,137 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2574 transitions. [2023-08-27 13:19:58,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2574 transitions. [2023-08-27 13:19:58,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:19:58,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2574 transitions. [2023-08-27 13:19:58,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 102.96) internal successors, (2574), 25 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:19:58,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 253.0) internal successors, (6578), 26 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:19:58,145 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 253.0) internal successors, (6578), 26 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:19:58,145 INFO L175 Difference]: Start difference. First operand has 458 places, 2349 transitions, 86379 flow. Second operand 25 states and 2574 transitions. [2023-08-27 13:19:58,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 2823 transitions, 106530 flow [2023-08-27 13:20:28,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 2823 transitions, 101927 flow, removed 1643 selfloop flow, removed 14 redundant places. [2023-08-27 13:20:28,958 INFO L231 Difference]: Finished difference. Result has 481 places, 2620 transitions, 97090 flow [2023-08-27 13:20:28,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=82036, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=97090, PETRI_PLACES=481, PETRI_TRANSITIONS=2620} [2023-08-27 13:20:28,960 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 456 predicate places. [2023-08-27 13:20:28,960 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 2620 transitions, 97090 flow [2023-08-27 13:20:28,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.45454545454545) internal successors, (2166), 22 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:20:28,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:20:28,961 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:20:28,965 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 13:20:29,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:20:29,161 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:20:29,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:20:29,162 INFO L85 PathProgramCache]: Analyzing trace with hash -432431833, now seen corresponding path program 19 times [2023-08-27 13:20:29,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:20:29,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660463718] [2023-08-27 13:20:29,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:20:29,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:20:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:20:29,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:20:29,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:20:29,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660463718] [2023-08-27 13:20:29,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660463718] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:20:29,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398795103] [2023-08-27 13:20:29,422 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 13:20:29,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:20:29,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:20:29,424 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 13:20:29,429 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 13:20:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:20:29,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 13:20:29,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:20:30,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:20:30,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:20:32,436 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))))) is different from false [2023-08-27 13:20:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-08-27 13:20:32,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398795103] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:20:32,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:20:32,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-08-27 13:20:32,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191236235] [2023-08-27 13:20:32,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:20:32,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 13:20:32,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:20:32,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 13:20:32,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=319, Unknown=1, NotChecked=36, Total=420 [2023-08-27 13:20:32,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 253 [2023-08-27 13:20:32,559 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 2620 transitions, 97090 flow. Second operand has 21 states, 21 states have (on average 98.38095238095238) internal successors, (2066), 21 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:20:32,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:20:32,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 253 [2023-08-27 13:20:32,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:20:35,198 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse3 (+ c_~j1~0 1))) (and (or (let ((.cse2 (* c_~m~0 2))) (let ((.cse1 (+ c_~k2~0 .cse2 (* (div (+ c_~k1~0 1) 4294967296) 4294967296))) (.cse0 (* (div (+ c_~k2~0 .cse2) 4294967296) 4294967296))) (and (< (+ .cse0 c_~k1~0) .cse1) (<= .cse1 (+ .cse0 c_~k1~0 1))))) (< c_~j1~0 c_~m~0)) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse3 ~m~0) (let ((.cse4 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse4) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse4 .cse5))))) (forall ((~m~0 Int)) (or (let ((.cse6 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse6 .cse5) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse6) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse3 ~m~0))) (< 0 c_~m~0) (<= c_~m~0 1) (= (mod (+ (* c_~m~0 4294967295) c_~k2~0) 4294967296) 0) (= (mod (+ 4294967295 c_~k1~0) 4294967296) 0))) is different from false [2023-08-27 13:20:39,726 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-08-27 13:20:44,248 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse0 (+ c_~j1~0 1)) (.cse5 (+ (* 4294967296 (div c_~k2~0 4294967296)) c_~k1~0)) (.cse4 (* 4294967296 (div c_~k1~0 4294967296)))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (< .cse0 ~m~0) (let ((.cse1 (* 2 ~m~0))) (< (+ c_~k1~0 (* (div (+ c_~k2~0 .cse1) 4294967296) 4294967296) 1) (+ c_~k2~0 .cse1 .cse2))))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (<= (+ c_~k2~0 .cse3 .cse2) (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse0 ~m~0))) (<= (+ c_~k2~0 .cse4) .cse5) (< .cse5 (+ c_~k2~0 .cse4 1)))) is different from false [2023-08-27 13:21:06,032 INFO L124 PetriNetUnfolderBase]: 15640/28870 cut-off events. [2023-08-27 13:21:06,032 INFO L125 PetriNetUnfolderBase]: For 1561673/1561673 co-relation queries the response was YES. [2023-08-27 13:21:06,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363007 conditions, 28870 events. 15640/28870 cut-off events. For 1561673/1561673 co-relation queries the response was YES. Maximal size of possible extension queue 1512. Compared 263017 event pairs, 1760 based on Foata normal form. 11/28881 useless extension candidates. Maximal degree in co-relation 362844. Up to 28074 conditions per place. [2023-08-27 13:21:06,766 INFO L140 encePairwiseOnDemand]: 245/253 looper letters, 2721 selfloop transitions, 120 changer transitions 5/2846 dead transitions. [2023-08-27 13:21:06,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 2846 transitions, 109868 flow [2023-08-27 13:21:06,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 13:21:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 13:21:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1849 transitions. [2023-08-27 13:21:06,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40601668862538426 [2023-08-27 13:21:06,769 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1849 transitions. [2023-08-27 13:21:06,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1849 transitions. [2023-08-27 13:21:06,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:21:06,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1849 transitions. [2023-08-27 13:21:06,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 102.72222222222223) internal successors, (1849), 18 states have internal predecessors, (1849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:21:06,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 253.0) internal successors, (4807), 19 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:21:06,773 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 253.0) internal successors, (4807), 19 states have internal predecessors, (4807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:21:06,773 INFO L175 Difference]: Start difference. First operand has 481 places, 2620 transitions, 97090 flow. Second operand 18 states and 1849 transitions. [2023-08-27 13:21:06,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 2846 transitions, 109868 flow [2023-08-27 13:21:40,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 2846 transitions, 107849 flow, removed 1001 selfloop flow, removed 5 redundant places. [2023-08-27 13:21:40,895 INFO L231 Difference]: Finished difference. Result has 503 places, 2717 transitions, 99160 flow [2023-08-27 13:21:40,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=95119, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=99160, PETRI_PLACES=503, PETRI_TRANSITIONS=2717} [2023-08-27 13:21:40,897 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 478 predicate places. [2023-08-27 13:21:40,897 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 2717 transitions, 99160 flow [2023-08-27 13:21:40,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.38095238095238) internal successors, (2066), 21 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:21:40,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:21:40,897 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:21:40,903 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 13:21:41,098 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,SelfDestructingSolverStorable37 [2023-08-27 13:21:41,098 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:21:41,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:21:41,098 INFO L85 PathProgramCache]: Analyzing trace with hash 627772301, now seen corresponding path program 20 times [2023-08-27 13:21:41,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:21:41,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616092157] [2023-08-27 13:21:41,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:21:41,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:21:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:21:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:21:41,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:21:41,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616092157] [2023-08-27 13:21:41,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616092157] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:21:41,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124209753] [2023-08-27 13:21:41,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 13:21:41,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:21:41,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:21:41,377 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 13:21:41,409 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 13:21:41,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 13:21:41,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:21:41,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 13:21:41,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:21:41,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:21:41,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:22:20,573 WARN L234 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 13:22:20,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:22:20,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124209753] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:22:20,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:22:20,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 19 [2023-08-27 13:22:20,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315829134] [2023-08-27 13:22:20,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:22:20,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 13:22:20,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:22:20,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 13:22:20,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=340, Unknown=10, NotChecked=0, Total=420 [2023-08-27 13:22:20,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 253 [2023-08-27 13:22:20,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 2717 transitions, 99160 flow. Second operand has 21 states, 21 states have (on average 98.38095238095238) internal successors, (2066), 21 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:22:20,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:22:20,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 253 [2023-08-27 13:22:20,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:22:23,376 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse2 (+ c_~j1~0 1))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (let ((.cse0 (* 2 ~m~0))) (<= (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse0) 4294967296) 4294967296)) (+ c_~k2~0 .cse0 .cse1))) (< .cse2 ~m~0))) (< 0 c_~m~0) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (< (+ c_~k2~0 .cse3 .cse1) (+ 3 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse2 ~m~0))) (<= c_~m~0 1) (= (mod (+ (* c_~m~0 4294967295) c_~k2~0) 4294967296) 0) (= (mod (+ 4294967295 c_~k1~0) 4294967296) 0) (or (let ((.cse6 (* c_~m~0 2))) (let ((.cse5 (+ c_~k2~0 .cse6 (* (div (+ c_~k1~0 1) 4294967296) 4294967296))) (.cse4 (* (div (+ c_~k2~0 .cse6) 4294967296) 4294967296))) (and (<= (+ .cse4 c_~k1~0 1) .cse5) (< .cse5 (+ .cse4 2 c_~k1~0))))) (< c_~j1~0 c_~m~0)))) is different from false [2023-08-27 13:22:26,787 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-08-27 13:22:30,152 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse2 (+ c_~j1~0 1)) (.cse4 (+ c_~k2~0 c_~m~0 (* (div (+ c_~k1~0 1) 4294967296) 4294967296))) (.cse3 (* (div (+ c_~k2~0 c_~m~0) 4294967296) 4294967296))) (and (exists ((~m~0 Int)) (and (<= ~m~0 1) (< 0 ~m~0) (= (mod (+ c_~k2~0 (* 4294967294 ~m~0)) 4294967296) 0))) (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (let ((.cse0 (* 2 ~m~0))) (<= (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse0) 4294967296) 4294967296)) (+ c_~k2~0 .cse0 .cse1))) (< .cse2 ~m~0))) (<= (+ .cse3 c_~k1~0 1) .cse4) (forall ((~m~0 Int)) (or (let ((.cse5 (* 2 ~m~0))) (< (+ c_~k2~0 .cse5 .cse1) (+ 3 c_~k1~0 (* (div (+ c_~k2~0 .cse5) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse2 ~m~0))) (< .cse4 (+ .cse3 2 c_~k1~0)) (= (mod (+ 4294967294 c_~k1~0) 4294967296) 0))) is different from false [2023-08-27 13:22:37,996 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse2 (+ c_~j1~0 1)) (.cse4 (+ c_~k2~0 c_~m~0 (* (div (+ c_~k1~0 1) 4294967296) 4294967296))) (.cse3 (* (div (+ c_~k2~0 c_~m~0) 4294967296) 4294967296)) (.cse7 (* 4294967296 (div c_~k2~0 4294967296))) (.cse6 (+ c_~k2~0 (* 4294967296 (div c_~k1~0 4294967296))))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (let ((.cse0 (* 2 ~m~0))) (<= (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse0) 4294967296) 4294967296)) (+ c_~k2~0 .cse0 .cse1))) (< .cse2 ~m~0))) (<= (+ .cse3 c_~k1~0 1) .cse4) (forall ((~m~0 Int)) (or (let ((.cse5 (* 2 ~m~0))) (< (+ c_~k2~0 .cse5 .cse1) (+ 3 c_~k1~0 (* (div (+ c_~k2~0 .cse5) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse2 ~m~0))) (< .cse4 (+ .cse3 2 c_~k1~0)) (< .cse6 (+ .cse7 c_~k1~0 1)) (<= (+ .cse7 c_~k1~0) .cse6))) is different from false [2023-08-27 13:22:45,049 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* 4294967296 (div (+ 2 c_~k1~0) 4294967296))) (.cse2 (+ c_~j1~0 1)) (.cse5 (* 4294967296 (div c_~k2~0 4294967296))) (.cse4 (+ c_~k2~0 (* 4294967296 (div c_~k1~0 4294967296))))) (and (forall ((~m~0 Int)) (or (<= ~m~0 c_~j1~0) (let ((.cse0 (* 2 ~m~0))) (<= (+ 2 c_~k1~0 (* (div (+ c_~k2~0 .cse0) 4294967296) 4294967296)) (+ c_~k2~0 .cse0 .cse1))) (< .cse2 ~m~0))) (forall ((~m~0 Int)) (or (let ((.cse3 (* 2 ~m~0))) (< (+ c_~k2~0 .cse3 .cse1) (+ 3 c_~k1~0 (* (div (+ c_~k2~0 .cse3) 4294967296) 4294967296)))) (<= ~m~0 c_~j1~0) (< .cse2 ~m~0))) (< .cse4 (+ .cse5 c_~k1~0 1)) (<= (+ .cse5 c_~k1~0) .cse4))) is different from false [2023-08-27 13:23:06,936 INFO L124 PetriNetUnfolderBase]: 16890/31332 cut-off events. [2023-08-27 13:23:06,936 INFO L125 PetriNetUnfolderBase]: For 1811270/1811270 co-relation queries the response was YES. [2023-08-27 13:23:07,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412325 conditions, 31332 events. 16890/31332 cut-off events. For 1811270/1811270 co-relation queries the response was YES. Maximal size of possible extension queue 1621. Compared 288947 event pairs, 1903 based on Foata normal form. 60/31392 useless extension candidates. Maximal degree in co-relation 412151. Up to 29029 conditions per place. [2023-08-27 13:23:07,893 INFO L140 encePairwiseOnDemand]: 245/253 looper letters, 2830 selfloop transitions, 249 changer transitions 24/3103 dead transitions. [2023-08-27 13:23:07,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 3103 transitions, 119532 flow [2023-08-27 13:23:07,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 13:23:07,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 13:23:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2363 transitions. [2023-08-27 13:23:07,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4060835195050696 [2023-08-27 13:23:07,896 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2363 transitions. [2023-08-27 13:23:07,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2363 transitions. [2023-08-27 13:23:07,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:23:07,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2363 transitions. [2023-08-27 13:23:07,899 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 102.73913043478261) internal successors, (2363), 23 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:23:07,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 253.0) internal successors, (6072), 24 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:23:07,902 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 253.0) internal successors, (6072), 24 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:23:07,902 INFO L175 Difference]: Start difference. First operand has 503 places, 2717 transitions, 99160 flow. Second operand 23 states and 2363 transitions. [2023-08-27 13:23:07,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 3103 transitions, 119532 flow [2023-08-27 13:23:46,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 3103 transitions, 118774 flow, removed 368 selfloop flow, removed 6 redundant places. [2023-08-27 13:23:46,272 INFO L231 Difference]: Finished difference. Result has 528 places, 2920 transitions, 107823 flow [2023-08-27 13:23:46,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=98442, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=107823, PETRI_PLACES=528, PETRI_TRANSITIONS=2920} [2023-08-27 13:23:46,275 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 503 predicate places. [2023-08-27 13:23:46,275 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 2920 transitions, 107823 flow [2023-08-27 13:23:46,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.38095238095238) internal successors, (2066), 21 states have internal predecessors, (2066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:23:46,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 13:23:46,275 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:23:46,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-27 13:23:46,476 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,SelfDestructingSolverStorable38 [2023-08-27 13:23:46,476 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 12 more)] === [2023-08-27 13:23:46,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 13:23:46,477 INFO L85 PathProgramCache]: Analyzing trace with hash 258416265, now seen corresponding path program 21 times [2023-08-27 13:23:46,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 13:23:46,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770434082] [2023-08-27 13:23:46,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 13:23:46,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 13:23:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 13:23:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:23:46,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 13:23:46,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770434082] [2023-08-27 13:23:46,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770434082] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 13:23:46,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860904166] [2023-08-27 13:23:46,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 13:23:46,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 13:23:46,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 13:23:46,943 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 13:23:46,944 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 13:23:47,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-08-27 13:23:47,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 13:23:47,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 13:23:47,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 13:23:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 13:23:47,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 13:23:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 13:23:48,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1860904166] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 13:23:48,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 13:23:48,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 24 [2023-08-27 13:23:48,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446134213] [2023-08-27 13:23:48,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 13:23:48,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 13:23:48,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 13:23:48,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 13:23:48,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-08-27 13:23:48,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 253 [2023-08-27 13:23:48,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 2920 transitions, 107823 flow. Second operand has 26 states, 26 states have (on average 98.0) internal successors, (2548), 26 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:23:48,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 13:23:48,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 253 [2023-08-27 13:23:48,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 13:24:34,789 INFO L124 PetriNetUnfolderBase]: 19837/36325 cut-off events. [2023-08-27 13:24:34,789 INFO L125 PetriNetUnfolderBase]: For 2280146/2280146 co-relation queries the response was YES. [2023-08-27 13:24:36,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 504556 conditions, 36325 events. 19837/36325 cut-off events. For 2280146/2280146 co-relation queries the response was YES. Maximal size of possible extension queue 1826. Compared 336465 event pairs, 1445 based on Foata normal form. 20/36345 useless extension candidates. Maximal degree in co-relation 504372. Up to 19828 conditions per place. [2023-08-27 13:24:36,225 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 1361 selfloop transitions, 2119 changer transitions 67/3547 dead transitions. [2023-08-27 13:24:36,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 3547 transitions, 134902 flow [2023-08-27 13:24:36,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-27 13:24:36,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-27 13:24:36,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4273 transitions. [2023-08-27 13:24:36,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40212685864859776 [2023-08-27 13:24:36,229 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4273 transitions. [2023-08-27 13:24:36,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4273 transitions. [2023-08-27 13:24:36,232 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 13:24:36,232 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4273 transitions. [2023-08-27 13:24:36,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 101.73809523809524) internal successors, (4273), 42 states have internal predecessors, (4273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:24:36,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 253.0) internal successors, (10879), 43 states have internal predecessors, (10879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:24:36,256 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 253.0) internal successors, (10879), 43 states have internal predecessors, (10879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 13:24:36,256 INFO L175 Difference]: Start difference. First operand has 528 places, 2920 transitions, 107823 flow. Second operand 42 states and 4273 transitions. [2023-08-27 13:24:36,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 3547 transitions, 134902 flow Received shutdown request... [2023-08-27 13:24:51,859 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 13:24:51,859 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 13:24:52,231 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (14 of 15 remaining) [2023-08-27 13:24:52,236 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 13:24:52,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-27 13:24:52,432 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-27 13:24:52,434 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 15 remaining) [2023-08-27 13:24:52,434 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 15 remaining) [2023-08-27 13:24:52,434 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 15 remaining) [2023-08-27 13:24:52,434 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 15 remaining) [2023-08-27 13:24:52,434 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 15 remaining) [2023-08-27 13:24:52,434 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 15 remaining) [2023-08-27 13:24:52,434 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 15 remaining) [2023-08-27 13:24:52,434 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 15 remaining) [2023-08-27 13:24:52,434 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 15 remaining) [2023-08-27 13:24:52,434 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 15 remaining) [2023-08-27 13:24:52,435 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 15 remaining) [2023-08-27 13:24:52,435 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 15 remaining) [2023-08-27 13:24:52,435 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 15 remaining) [2023-08-27 13:24:52,435 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 15 remaining) [2023-08-27 13:24:52,435 INFO L445 BasicCegarLoop]: Path program histogram: [21, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 13:24:52,439 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 13:24:52,439 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 13:24:52,441 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 01:24:52 BasicIcfg [2023-08-27 13:24:52,441 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 13:24:52,442 INFO L158 Benchmark]: Toolchain (without parser) took 814348.32ms. Allocated memory was 373.3MB in the beginning and 7.9GB in the end (delta: 7.5GB). Free memory was 349.3MB in the beginning and 4.4GB in the end (delta: -4.1GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. [2023-08-27 13:24:52,442 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 373.3MB. Free memory is still 349.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 13:24:52,442 INFO L158 Benchmark]: CACSL2BoogieTranslator took 247.39ms. Allocated memory is still 373.3MB. Free memory was 348.8MB in the beginning and 338.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 13:24:52,442 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.36ms. Allocated memory is still 373.3MB. Free memory was 338.3MB in the beginning and 336.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 13:24:52,443 INFO L158 Benchmark]: Boogie Preprocessor took 23.64ms. Allocated memory is still 373.3MB. Free memory was 336.7MB in the beginning and 335.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 13:24:52,443 INFO L158 Benchmark]: RCFGBuilder took 449.42ms. Allocated memory is still 373.3MB. Free memory was 335.1MB in the beginning and 320.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-27 13:24:52,443 INFO L158 Benchmark]: TraceAbstraction took 813577.27ms. Allocated memory was 373.3MB in the beginning and 7.9GB in the end (delta: 7.5GB). Free memory was 319.9MB in the beginning and 4.4GB in the end (delta: -4.1GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. [2023-08-27 13:24:52,444 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 373.3MB. Free memory is still 349.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 247.39ms. Allocated memory is still 373.3MB. Free memory was 348.8MB in the beginning and 338.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 39.36ms. Allocated memory is still 373.3MB. Free memory was 338.3MB in the beginning and 336.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.64ms. Allocated memory is still 373.3MB. Free memory was 336.7MB in the beginning and 335.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 449.42ms. Allocated memory is still 373.3MB. Free memory was 335.1MB in the beginning and 320.4MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 813577.27ms. Allocated memory was 373.3MB in the beginning and 7.9GB in the end (delta: 7.5GB). Free memory was 319.9MB in the beginning and 4.4GB in the end (delta: -4.1GB). Peak memory consumption was 4.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.6s, 119 PlacesBefore, 25 PlacesAfterwards, 121 TransitionsBefore, 21 TransitionsAfterwards, 1300 CoEnabledTransitionPairs, 7 FixpointIterations, 63 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 8 TrivialYvCompositions, 6 ConcurrentYvCompositions, 6 ChoiceCompositions, 121 TotalNumberOfCompositions, 1341 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1341, independent: 1341, independent conditional: 0, independent unconditional: 1341, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 685, independent: 685, independent conditional: 0, independent unconditional: 685, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1341, independent: 656, independent conditional: 0, independent unconditional: 656, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 685, unknown conditional: 0, unknown unconditional: 685] , Statistics on independence cache: Total cache size (in pairs): 37, Positive cache size: 37, Positive conditional cache size: 0, Positive unconditional cache size: 37, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 44]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 41]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 161 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: 813.4s, OverallIterations: 40, TraceHistogramMax: 5, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 723.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.7s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 3162 SdHoareTripleChecker+Valid, 27.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3162 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 25.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 595 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 428 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 15787 IncrementalHoareTripleChecker+Invalid, 16811 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 428 mSolverCounterUnsat, 0 mSDtfsCounter, 15787 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1380 GetRequests, 608 SyntacticMatches, 66 SemanticMatches, 706 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 5606 ImplicationChecksByTransitivity, 111.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=111929occurred in iteration=26, InterpolantAutomatonStates: 533, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.6s SatisfiabilityAnalysisTime, 75.1s InterpolantComputationTime, 1018 NumberOfCodeBlocks, 1002 NumberOfCodeBlocksAsserted, 108 NumberOfCheckSat, 1370 ConstructedInterpolants, 20 QuantifiedInterpolants, 22658 SizeOfPredicates, 134 NumberOfNonLiveVariables, 3993 ConjunctsInSsa, 394 ConjunctsInUnsatCore, 99 InterpolantComputations, 12 PerfectInterpolantSequences, 181/676 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