/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/popl20-more-sorted.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 14:37:55,396 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 14:37:55,469 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 14:37:55,474 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 14:37:55,475 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 14:37:55,508 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 14:37:55,509 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 14:37:55,509 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 14:37:55,510 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 14:37:55,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 14:37:55,513 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 14:37:55,514 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 14:37:55,514 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 14:37:55,515 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 14:37:55,515 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 14:37:55,516 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 14:37:55,516 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 14:37:55,516 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 14:37:55,516 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 14:37:55,517 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 14:37:55,517 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 14:37:55,518 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 14:37:55,518 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 14:37:55,518 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 14:37:55,519 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 14:37:55,519 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 14:37:55,519 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 14:37:55,519 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:37:55,520 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 14:37:55,520 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 14:37:55,521 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 14:37:55,521 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 14:37:55,521 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 14:37:55,521 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 14:37:55,521 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 14:37:55,522 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 14:37:55,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 14:37:55,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 14:37:55,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 14:37:55,858 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 14:37:55,858 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 14:37:55,859 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-08-27 14:37:57,086 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 14:37:57,318 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 14:37:57,318 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-sorted.wvr.c [2023-08-27 14:37:57,324 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fba90d8d3/fbfd582bf8c848f7bf3e50813390d323/FLAG12d85df9d [2023-08-27 14:37:57,334 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fba90d8d3/fbfd582bf8c848f7bf3e50813390d323 [2023-08-27 14:37:57,336 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 14:37:57,337 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 14:37:57,338 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 14:37:57,339 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 14:37:57,341 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 14:37:57,342 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:37:57" (1/1) ... [2023-08-27 14:37:57,342 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3229151f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:57, skipping insertion in model container [2023-08-27 14:37:57,343 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:37:57" (1/1) ... [2023-08-27 14:37:57,361 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 14:37:57,517 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:37:57,524 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 14:37:57,546 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 14:37:57,559 INFO L206 MainTranslator]: Completed translation [2023-08-27 14:37:57,560 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:57 WrapperNode [2023-08-27 14:37:57,560 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 14:37:57,561 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 14:37:57,561 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 14:37:57,561 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 14:37:57,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:57" (1/1) ... [2023-08-27 14:37:57,586 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:57" (1/1) ... [2023-08-27 14:37:57,616 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 113 [2023-08-27 14:37:57,616 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 14:37:57,617 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 14:37:57,617 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 14:37:57,618 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 14:37:57,625 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:57" (1/1) ... [2023-08-27 14:37:57,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:57" (1/1) ... [2023-08-27 14:37:57,639 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:57" (1/1) ... [2023-08-27 14:37:57,639 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:57" (1/1) ... [2023-08-27 14:37:57,645 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:57" (1/1) ... [2023-08-27 14:37:57,658 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:57" (1/1) ... [2023-08-27 14:37:57,659 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:57" (1/1) ... [2023-08-27 14:37:57,660 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:57" (1/1) ... [2023-08-27 14:37:57,663 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 14:37:57,663 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 14:37:57,663 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 14:37:57,663 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 14:37:57,664 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:57" (1/1) ... [2023-08-27 14:37:57,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 14:37:57,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:37:57,703 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 14:37:57,724 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 14:37:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 14:37:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 14:37:57,744 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 14:37:57,744 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 14:37:57,744 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 14:37:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 14:37:57,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 14:37:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 14:37:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 14:37:57,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 14:37:57,746 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 14:37:57,746 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 14:37:57,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 14:37:57,746 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 14:37:57,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 14:37:57,748 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 14:37:57,864 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 14:37:57,869 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 14:37:58,213 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 14:37:58,231 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 14:37:58,232 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-27 14:37:58,234 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:37:58 BoogieIcfgContainer [2023-08-27 14:37:58,234 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 14:37:58,236 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 14:37:58,236 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 14:37:58,239 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 14:37:58,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 02:37:57" (1/3) ... [2023-08-27 14:37:58,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3018d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:37:58, skipping insertion in model container [2023-08-27 14:37:58,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:37:57" (2/3) ... [2023-08-27 14:37:58,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c3018d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:37:58, skipping insertion in model container [2023-08-27 14:37:58,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:37:58" (3/3) ... [2023-08-27 14:37:58,241 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-sorted.wvr.c [2023-08-27 14:37:58,257 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 14:37:58,257 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2023-08-27 14:37:58,258 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 14:37:58,347 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 14:37:58,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 211 places, 216 transitions, 456 flow [2023-08-27 14:37:58,503 INFO L124 PetriNetUnfolderBase]: 15/213 cut-off events. [2023-08-27 14:37:58,503 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 14:37:58,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 226 conditions, 213 events. 15/213 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 383 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 154. Up to 2 conditions per place. [2023-08-27 14:37:58,513 INFO L82 GeneralOperation]: Start removeDead. Operand has 211 places, 216 transitions, 456 flow [2023-08-27 14:37:58,518 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 202 transitions, 422 flow [2023-08-27 14:37:58,521 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 14:37:58,528 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 202 transitions, 422 flow [2023-08-27 14:37:58,530 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 202 transitions, 422 flow [2023-08-27 14:37:58,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 202 transitions, 422 flow [2023-08-27 14:37:58,568 INFO L124 PetriNetUnfolderBase]: 15/202 cut-off events. [2023-08-27 14:37:58,568 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 14:37:58,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 202 events. 15/202 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 382 event pairs, 0 based on Foata normal form. 0/169 useless extension candidates. Maximal degree in co-relation 154. Up to 2 conditions per place. [2023-08-27 14:37:58,574 INFO L119 LiptonReduction]: Number of co-enabled transitions 7840 [2023-08-27 14:38:04,847 INFO L134 LiptonReduction]: Checked pairs total: 9272 [2023-08-27 14:38:04,847 INFO L136 LiptonReduction]: Total number of compositions: 225 [2023-08-27 14:38:04,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 14:38:04,865 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;@28061964, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 14:38:04,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-08-27 14:38:04,867 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 14:38:04,868 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 14:38:04,868 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 14:38:04,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:04,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 14:38:04,869 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:04,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:04,873 INFO L85 PathProgramCache]: Analyzing trace with hash 27119, now seen corresponding path program 1 times [2023-08-27 14:38:04,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:04,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914868437] [2023-08-27 14:38:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:04,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:04,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:05,116 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 14:38:05,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:05,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914868437] [2023-08-27 14:38:05,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914868437] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:05,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:05,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 14:38:05,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506470778] [2023-08-27 14:38:05,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:05,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:05,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:05,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:05,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:38:05,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 441 [2023-08-27 14:38:05,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:05,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:05,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 441 [2023-08-27 14:38:05,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:05,748 INFO L124 PetriNetUnfolderBase]: 4582/6031 cut-off events. [2023-08-27 14:38:05,749 INFO L125 PetriNetUnfolderBase]: For 139/139 co-relation queries the response was YES. [2023-08-27 14:38:05,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12079 conditions, 6031 events. 4582/6031 cut-off events. For 139/139 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 29267 event pairs, 2364 based on Foata normal form. 0/2212 useless extension candidates. Maximal degree in co-relation 11015. Up to 5800 conditions per place. [2023-08-27 14:38:05,794 INFO L140 encePairwiseOnDemand]: 433/441 looper letters, 39 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-08-27 14:38:05,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 196 flow [2023-08-27 14:38:05,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:05,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2023-08-27 14:38:05,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47316704459561604 [2023-08-27 14:38:05,814 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2023-08-27 14:38:05,814 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2023-08-27 14:38:05,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:05,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2023-08-27 14:38:05,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:05,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:05,832 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:05,834 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 114 flow. Second operand 3 states and 626 transitions. [2023-08-27 14:38:05,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 196 flow [2023-08-27 14:38:05,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 184 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 14:38:05,852 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 117 flow [2023-08-27 14:38:05,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=117, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2023-08-27 14:38:05,856 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2023-08-27 14:38:05,857 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 117 flow [2023-08-27 14:38:05,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.66666666666666) internal successors, (581), 3 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:05,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:05,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 14:38:05,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 14:38:05,858 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:05,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:05,859 INFO L85 PathProgramCache]: Analyzing trace with hash 842822, now seen corresponding path program 1 times [2023-08-27 14:38:05,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:05,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918068966] [2023-08-27 14:38:05,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:05,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:05,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:06,011 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 14:38:06,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:06,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918068966] [2023-08-27 14:38:06,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918068966] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:06,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146226120] [2023-08-27 14:38:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:06,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:06,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:06,015 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 14:38:06,019 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 14:38:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:06,089 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:38:06,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:06,140 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 14:38:06,140 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:38:06,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146226120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:06,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:38:06,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-27 14:38:06,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20951032] [2023-08-27 14:38:06,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:06,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:38:06,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:06,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:38:06,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 14:38:06,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 441 [2023-08-27 14:38:06,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 117 flow. Second operand has 4 states, 4 states have (on average 193.75) internal successors, (775), 4 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:06,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:06,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 441 [2023-08-27 14:38:06,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:06,600 INFO L124 PetriNetUnfolderBase]: 4582/6030 cut-off events. [2023-08-27 14:38:06,600 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-27 14:38:06,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11932 conditions, 6030 events. 4582/6030 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 29290 event pairs, 2364 based on Foata normal form. 0/2212 useless extension candidates. Maximal degree in co-relation 11908. Up to 5796 conditions per place. [2023-08-27 14:38:06,639 INFO L140 encePairwiseOnDemand]: 437/441 looper letters, 37 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-08-27 14:38:06,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 195 flow [2023-08-27 14:38:06,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:38:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:38:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 814 transitions. [2023-08-27 14:38:06,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4614512471655329 [2023-08-27 14:38:06,642 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 814 transitions. [2023-08-27 14:38:06,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 814 transitions. [2023-08-27 14:38:06,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:06,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 814 transitions. [2023-08-27 14:38:06,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 203.5) internal successors, (814), 4 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:06,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 441.0) internal successors, (2205), 5 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:06,648 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 441.0) internal successors, (2205), 5 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:06,648 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 117 flow. Second operand 4 states and 814 transitions. [2023-08-27 14:38:06,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 195 flow [2023-08-27 14:38:06,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 46 transitions, 190 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 14:38:06,650 INFO L231 Difference]: Finished difference. Result has 47 places, 46 transitions, 116 flow [2023-08-27 14:38:06,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=47, PETRI_TRANSITIONS=46} [2023-08-27 14:38:06,651 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2023-08-27 14:38:06,651 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 46 transitions, 116 flow [2023-08-27 14:38:06,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.75) internal successors, (775), 4 states have internal predecessors, (775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:06,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:06,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 14:38:06,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 14:38:06,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:06,858 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:06,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:06,859 INFO L85 PathProgramCache]: Analyzing trace with hash 842838, now seen corresponding path program 1 times [2023-08-27 14:38:06,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:06,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815633948] [2023-08-27 14:38:06,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:06,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:06,919 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 14:38:06,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:06,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815633948] [2023-08-27 14:38:06,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815633948] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:06,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854303738] [2023-08-27 14:38:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:06,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:06,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:06,922 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 14:38:06,924 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 14:38:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:06,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:38:06,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:06,994 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 14:38:06,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:07,008 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 14:38:07,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854303738] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:07,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:07,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 14:38:07,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858046878] [2023-08-27 14:38:07,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:07,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 14:38:07,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:07,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 14:38:07,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 14:38:07,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 441 [2023-08-27 14:38:07,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 46 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 194.14285714285714) internal successors, (1359), 7 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:07,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:07,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 441 [2023-08-27 14:38:07,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:07,411 INFO L124 PetriNetUnfolderBase]: 4585/6036 cut-off events. [2023-08-27 14:38:07,412 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-27 14:38:07,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11954 conditions, 6036 events. 4585/6036 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 29284 event pairs, 2364 based on Foata normal form. 0/2220 useless extension candidates. Maximal degree in co-relation 11908. Up to 5802 conditions per place. [2023-08-27 14:38:07,453 INFO L140 encePairwiseOnDemand]: 437/441 looper letters, 38 selfloop transitions, 9 changer transitions 0/52 dead transitions. [2023-08-27 14:38:07,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 240 flow [2023-08-27 14:38:07,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:38:07,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:38:07,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1208 transitions. [2023-08-27 14:38:07,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4565381708238851 [2023-08-27 14:38:07,457 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1208 transitions. [2023-08-27 14:38:07,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1208 transitions. [2023-08-27 14:38:07,458 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:07,458 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1208 transitions. [2023-08-27 14:38:07,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 201.33333333333334) internal successors, (1208), 6 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 14:38:07,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 441.0) internal successors, (3087), 7 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 14:38:07,467 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 441.0) internal successors, (3087), 7 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 14:38:07,467 INFO L175 Difference]: Start difference. First operand has 47 places, 46 transitions, 116 flow. Second operand 6 states and 1208 transitions. [2023-08-27 14:38:07,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 240 flow [2023-08-27 14:38:07,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 231 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 14:38:07,470 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 174 flow [2023-08-27 14:38:07,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=174, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-08-27 14:38:07,472 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-27 14:38:07,472 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 174 flow [2023-08-27 14:38:07,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 194.14285714285714) internal successors, (1359), 7 states have internal predecessors, (1359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:07,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:07,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 14:38:07,483 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 14:38:07,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-27 14:38:07,684 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:07,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:07,684 INFO L85 PathProgramCache]: Analyzing trace with hash 809675608, now seen corresponding path program 1 times [2023-08-27 14:38:07,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:07,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601148618] [2023-08-27 14:38:07,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:07,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:07,756 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 14:38:07,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:07,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601148618] [2023-08-27 14:38:07,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601148618] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:07,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:07,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:38:07,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355585451] [2023-08-27 14:38:07,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:07,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:38:07,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:07,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:38:07,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 14:38:07,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 441 [2023-08-27 14:38:07,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:07,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:07,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 441 [2023-08-27 14:38:07,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:08,138 INFO L124 PetriNetUnfolderBase]: 4585/5866 cut-off events. [2023-08-27 14:38:08,138 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-27 14:38:08,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11801 conditions, 5866 events. 4585/5866 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 26421 event pairs, 2364 based on Foata normal form. 0/2051 useless extension candidates. Maximal degree in co-relation 11765. Up to 5805 conditions per place. [2023-08-27 14:38:08,165 INFO L140 encePairwiseOnDemand]: 438/441 looper letters, 46 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-27 14:38:08,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 264 flow [2023-08-27 14:38:08,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:08,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:08,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 575 transitions. [2023-08-27 14:38:08,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346182917611489 [2023-08-27 14:38:08,168 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 575 transitions. [2023-08-27 14:38:08,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 575 transitions. [2023-08-27 14:38:08,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:08,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 575 transitions. [2023-08-27 14:38:08,170 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,172 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,173 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,173 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 174 flow. Second operand 3 states and 575 transitions. [2023-08-27 14:38:08,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 264 flow [2023-08-27 14:38:08,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 243 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 14:38:08,175 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 151 flow [2023-08-27 14:38:08,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2023-08-27 14:38:08,176 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2023-08-27 14:38:08,176 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 151 flow [2023-08-27 14:38:08,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:08,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 14:38:08,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 14:38:08,177 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:08,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:08,177 INFO L85 PathProgramCache]: Analyzing trace with hash 809675902, now seen corresponding path program 1 times [2023-08-27 14:38:08,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:08,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170836934] [2023-08-27 14:38:08,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:08,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:08,210 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 14:38:08,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:08,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170836934] [2023-08-27 14:38:08,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170836934] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:08,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:08,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:38:08,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950781380] [2023-08-27 14:38:08,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:08,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:08,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:08,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:08,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:38:08,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 441 [2023-08-27 14:38:08,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:08,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 441 [2023-08-27 14:38:08,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:08,730 INFO L124 PetriNetUnfolderBase]: 6254/8047 cut-off events. [2023-08-27 14:38:08,731 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-27 14:38:08,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16211 conditions, 8047 events. 6254/8047 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 38977 event pairs, 2419 based on Foata normal form. 0/3128 useless extension candidates. Maximal degree in co-relation 16199. Up to 5570 conditions per place. [2023-08-27 14:38:08,769 INFO L140 encePairwiseOnDemand]: 435/441 looper letters, 70 selfloop transitions, 3 changer transitions 0/75 dead transitions. [2023-08-27 14:38:08,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 349 flow [2023-08-27 14:38:08,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:08,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:08,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 635 transitions. [2023-08-27 14:38:08,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4799697656840514 [2023-08-27 14:38:08,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 635 transitions. [2023-08-27 14:38:08,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 635 transitions. [2023-08-27 14:38:08,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:08,772 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 635 transitions. [2023-08-27 14:38:08,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,776 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,776 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 151 flow. Second operand 3 states and 635 transitions. [2023-08-27 14:38:08,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 349 flow [2023-08-27 14:38:08,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:38:08,779 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 173 flow [2023-08-27 14:38:08,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=173, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2023-08-27 14:38:08,779 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-08-27 14:38:08,779 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 173 flow [2023-08-27 14:38:08,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:08,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 14:38:08,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 14:38:08,780 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:08,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:08,781 INFO L85 PathProgramCache]: Analyzing trace with hash 809675793, now seen corresponding path program 1 times [2023-08-27 14:38:08,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:08,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959054294] [2023-08-27 14:38:08,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:08,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:08,805 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 14:38:08,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:08,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959054294] [2023-08-27 14:38:08,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959054294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:08,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:08,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 14:38:08,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992764529] [2023-08-27 14:38:08,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:08,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:08,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:08,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:08,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:38:08,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 441 [2023-08-27 14:38:08,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 173 flow. Second operand has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:08,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:08,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 441 [2023-08-27 14:38:08,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:09,202 INFO L124 PetriNetUnfolderBase]: 4039/5249 cut-off events. [2023-08-27 14:38:09,203 INFO L125 PetriNetUnfolderBase]: For 430/532 co-relation queries the response was YES. [2023-08-27 14:38:09,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11511 conditions, 5249 events. 4039/5249 cut-off events. For 430/532 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 23976 event pairs, 2207 based on Foata normal form. 102/2475 useless extension candidates. Maximal degree in co-relation 11498. Up to 5196 conditions per place. [2023-08-27 14:38:09,227 INFO L140 encePairwiseOnDemand]: 438/441 looper letters, 46 selfloop transitions, 1 changer transitions 0/50 dead transitions. [2023-08-27 14:38:09,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 50 transitions, 263 flow [2023-08-27 14:38:09,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:09,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:09,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-08-27 14:38:09,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2023-08-27 14:38:09,230 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-08-27 14:38:09,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-08-27 14:38:09,230 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:09,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-08-27 14:38:09,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,234 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 173 flow. Second operand 3 states and 594 transitions. [2023-08-27 14:38:09,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 50 transitions, 263 flow [2023-08-27 14:38:09,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 50 transitions, 260 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:38:09,238 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 168 flow [2023-08-27 14:38:09,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2023-08-27 14:38:09,241 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2023-08-27 14:38:09,241 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 168 flow [2023-08-27 14:38:09,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 186.33333333333334) internal successors, (559), 3 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:09,242 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 14:38:09,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 14:38:09,242 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:09,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:09,243 INFO L85 PathProgramCache]: Analyzing trace with hash -659175489, now seen corresponding path program 2 times [2023-08-27 14:38:09,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:09,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094398009] [2023-08-27 14:38:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:09,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:09,346 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 14:38:09,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:09,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094398009] [2023-08-27 14:38:09,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094398009] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:09,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660216184] [2023-08-27 14:38:09,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:38:09,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:09,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:09,348 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 14:38:09,366 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 14:38:09,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:38:09,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:38:09,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 14:38:09,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:09,433 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 14:38:09,434 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:38:09,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660216184] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:09,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:38:09,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 14:38:09,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415530161] [2023-08-27 14:38:09,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:09,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:09,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:09,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:09,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 14:38:09,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 441 [2023-08-27 14:38:09,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:09,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 441 [2023-08-27 14:38:09,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:09,797 INFO L124 PetriNetUnfolderBase]: 4039/5248 cut-off events. [2023-08-27 14:38:09,798 INFO L125 PetriNetUnfolderBase]: For 429/531 co-relation queries the response was YES. [2023-08-27 14:38:09,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11300 conditions, 5248 events. 4039/5248 cut-off events. For 429/531 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 23902 event pairs, 2207 based on Foata normal form. 103/2475 useless extension candidates. Maximal degree in co-relation 11286. Up to 5195 conditions per place. [2023-08-27 14:38:09,822 INFO L140 encePairwiseOnDemand]: 439/441 looper letters, 45 selfloop transitions, 1 changer transitions 0/49 dead transitions. [2023-08-27 14:38:09,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 49 transitions, 250 flow [2023-08-27 14:38:09,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:09,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:09,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 619 transitions. [2023-08-27 14:38:09,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46787603930461075 [2023-08-27 14:38:09,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 619 transitions. [2023-08-27 14:38:09,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 619 transitions. [2023-08-27 14:38:09,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:09,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 619 transitions. [2023-08-27 14:38:09,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,828 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 168 flow. Second operand 3 states and 619 transitions. [2023-08-27 14:38:09,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 49 transitions, 250 flow [2023-08-27 14:38:09,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 233 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-27 14:38:09,830 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 143 flow [2023-08-27 14:38:09,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=141, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2023-08-27 14:38:09,831 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2023-08-27 14:38:09,831 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 143 flow [2023-08-27 14:38:09,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:09,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:09,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:09,839 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 14:38:10,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:10,037 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:10,037 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:10,037 INFO L85 PathProgramCache]: Analyzing trace with hash 709485162, now seen corresponding path program 1 times [2023-08-27 14:38:10,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:10,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938712945] [2023-08-27 14:38:10,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:10,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:10,078 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 14:38:10,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:10,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938712945] [2023-08-27 14:38:10,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938712945] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:10,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500238698] [2023-08-27 14:38:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:10,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:10,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:10,083 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 14:38:10,106 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 14:38:10,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:10,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 14:38:10,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:10,201 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 14:38:10,202 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 14:38:10,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500238698] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:10,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 14:38:10,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 7 [2023-08-27 14:38:10,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787590434] [2023-08-27 14:38:10,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:10,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 14:38:10,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:10,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 14:38:10,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-08-27 14:38:10,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 441 [2023-08-27 14:38:10,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 164.4) internal successors, (822), 5 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:10,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:10,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 441 [2023-08-27 14:38:10,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:10,595 INFO L124 PetriNetUnfolderBase]: 4370/5688 cut-off events. [2023-08-27 14:38:10,595 INFO L125 PetriNetUnfolderBase]: For 521/521 co-relation queries the response was YES. [2023-08-27 14:38:10,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12272 conditions, 5688 events. 4370/5688 cut-off events. For 521/521 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 26045 event pairs, 2418 based on Foata normal form. 1/2606 useless extension candidates. Maximal degree in co-relation 12261. Up to 5629 conditions per place. [2023-08-27 14:38:10,614 INFO L140 encePairwiseOnDemand]: 438/441 looper letters, 44 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2023-08-27 14:38:10,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 48 transitions, 231 flow [2023-08-27 14:38:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 528 transitions. [2023-08-27 14:38:10,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39909297052154197 [2023-08-27 14:38:10,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 528 transitions. [2023-08-27 14:38:10,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 528 transitions. [2023-08-27 14:38:10,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:10,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 528 transitions. [2023-08-27 14:38:10,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:10,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:10,621 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:10,621 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 143 flow. Second operand 3 states and 528 transitions. [2023-08-27 14:38:10,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 48 transitions, 231 flow [2023-08-27 14:38:10,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 48 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:38:10,622 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 142 flow [2023-08-27 14:38:10,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-08-27 14:38:10,623 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2023-08-27 14:38:10,623 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 142 flow [2023-08-27 14:38:10,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 164.4) internal successors, (822), 5 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:10,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:10,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:10,636 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 14:38:10,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:10,829 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:10,829 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:10,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1856654963, now seen corresponding path program 1 times [2023-08-27 14:38:10,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:10,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725895632] [2023-08-27 14:38:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:10,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:10,874 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 14:38:10,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:10,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725895632] [2023-08-27 14:38:10,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725895632] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:10,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720221314] [2023-08-27 14:38:10,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:10,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:10,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:10,876 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 14:38:10,879 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 14:38:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:10,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 14:38:10,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:11,002 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 14:38:11,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:11,055 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 14:38:11,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720221314] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:11,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:11,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 11 [2023-08-27 14:38:11,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63149029] [2023-08-27 14:38:11,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:11,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 14:38:11,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:11,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 14:38:11,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2023-08-27 14:38:11,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 441 [2023-08-27 14:38:11,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 142 flow. Second operand has 11 states, 11 states have (on average 164.9090909090909) internal successors, (1814), 11 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:11,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:11,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 441 [2023-08-27 14:38:11,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:11,612 INFO L124 PetriNetUnfolderBase]: 5183/6714 cut-off events. [2023-08-27 14:38:11,612 INFO L125 PetriNetUnfolderBase]: For 537/537 co-relation queries the response was YES. [2023-08-27 14:38:11,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14405 conditions, 6714 events. 5183/6714 cut-off events. For 537/537 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 30213 event pairs, 855 based on Foata normal form. 110/3416 useless extension candidates. Maximal degree in co-relation 14393. Up to 2168 conditions per place. [2023-08-27 14:38:11,636 INFO L140 encePairwiseOnDemand]: 431/441 looper letters, 118 selfloop transitions, 10 changer transitions 0/130 dead transitions. [2023-08-27 14:38:11,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 130 transitions, 574 flow [2023-08-27 14:38:11,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 14:38:11,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 14:38:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1432 transitions. [2023-08-27 14:38:11,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40589569160997735 [2023-08-27 14:38:11,640 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1432 transitions. [2023-08-27 14:38:11,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1432 transitions. [2023-08-27 14:38:11,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:11,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1432 transitions. [2023-08-27 14:38:11,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 179.0) internal successors, (1432), 8 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:11,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 441.0) internal successors, (3969), 9 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:11,649 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 441.0) internal successors, (3969), 9 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:11,649 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 142 flow. Second operand 8 states and 1432 transitions. [2023-08-27 14:38:11,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 130 transitions, 574 flow [2023-08-27 14:38:11,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 130 transitions, 570 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 14:38:11,652 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 164 flow [2023-08-27 14:38:11,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=164, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-27 14:38:11,652 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-08-27 14:38:11,653 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 164 flow [2023-08-27 14:38:11,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 164.9090909090909) internal successors, (1814), 11 states have internal predecessors, (1814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:11,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:11,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:11,659 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 14:38:11,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:11,859 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:11,859 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:11,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1864589839, now seen corresponding path program 1 times [2023-08-27 14:38:11,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:11,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112554007] [2023-08-27 14:38:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:11,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:11,887 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 14:38:11,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:11,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112554007] [2023-08-27 14:38:11,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112554007] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:11,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:11,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:38:11,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685259421] [2023-08-27 14:38:11,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:11,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:11,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:11,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:11,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:38:11,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 441 [2023-08-27 14:38:11,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:11,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:11,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 441 [2023-08-27 14:38:11,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:12,442 INFO L124 PetriNetUnfolderBase]: 5485/7218 cut-off events. [2023-08-27 14:38:12,442 INFO L125 PetriNetUnfolderBase]: For 2145/2286 co-relation queries the response was YES. [2023-08-27 14:38:12,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16738 conditions, 7218 events. 5485/7218 cut-off events. For 2145/2286 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 34475 event pairs, 1787 based on Foata normal form. 141/4096 useless extension candidates. Maximal degree in co-relation 16725. Up to 5369 conditions per place. [2023-08-27 14:38:12,471 INFO L140 encePairwiseOnDemand]: 434/441 looper letters, 65 selfloop transitions, 3 changer transitions 0/71 dead transitions. [2023-08-27 14:38:12,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 71 transitions, 373 flow [2023-08-27 14:38:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:12,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 626 transitions. [2023-08-27 14:38:12,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47316704459561604 [2023-08-27 14:38:12,474 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 626 transitions. [2023-08-27 14:38:12,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 626 transitions. [2023-08-27 14:38:12,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:12,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 626 transitions. [2023-08-27 14:38:12,476 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.66666666666666) internal successors, (626), 3 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:12,477 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:12,478 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:12,478 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 164 flow. Second operand 3 states and 626 transitions. [2023-08-27 14:38:12,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 71 transitions, 373 flow [2023-08-27 14:38:12,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 71 transitions, 360 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 14:38:12,481 INFO L231 Difference]: Finished difference. Result has 54 places, 50 transitions, 179 flow [2023-08-27 14:38:12,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=179, PETRI_PLACES=54, PETRI_TRANSITIONS=50} [2023-08-27 14:38:12,481 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-08-27 14:38:12,482 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 50 transitions, 179 flow [2023-08-27 14:38:12,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.66666666666666) internal successors, (575), 3 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:12,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:12,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:12,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 14:38:12,482 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:12,483 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:12,483 INFO L85 PathProgramCache]: Analyzing trace with hash 876572432, now seen corresponding path program 1 times [2023-08-27 14:38:12,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:12,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155706974] [2023-08-27 14:38:12,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:12,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:12,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:12,518 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 14:38:12,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:12,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155706974] [2023-08-27 14:38:12,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155706974] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:12,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:12,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:38:12,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133648531] [2023-08-27 14:38:12,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:12,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 14:38:12,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:12,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 14:38:12,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 14:38:12,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 441 [2023-08-27 14:38:12,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 50 transitions, 179 flow. Second operand has 4 states, 4 states have (on average 186.5) internal successors, (746), 4 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:12,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:12,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 441 [2023-08-27 14:38:12,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:12,765 INFO L124 PetriNetUnfolderBase]: 2847/3909 cut-off events. [2023-08-27 14:38:12,765 INFO L125 PetriNetUnfolderBase]: For 1054/1224 co-relation queries the response was YES. [2023-08-27 14:38:12,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10230 conditions, 3909 events. 2847/3909 cut-off events. For 1054/1224 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 17856 event pairs, 1274 based on Foata normal form. 170/2976 useless extension candidates. Maximal degree in co-relation 10216. Up to 2608 conditions per place. [2023-08-27 14:38:12,780 INFO L140 encePairwiseOnDemand]: 436/441 looper letters, 67 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2023-08-27 14:38:12,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 73 transitions, 407 flow [2023-08-27 14:38:12,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 14:38:12,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 14:38:12,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 791 transitions. [2023-08-27 14:38:12,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2023-08-27 14:38:12,783 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 791 transitions. [2023-08-27 14:38:12,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 791 transitions. [2023-08-27 14:38:12,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:12,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 791 transitions. [2023-08-27 14:38:12,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.75) internal successors, (791), 4 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:12,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 441.0) internal successors, (2205), 5 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:12,788 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 441.0) internal successors, (2205), 5 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:12,788 INFO L175 Difference]: Start difference. First operand has 54 places, 50 transitions, 179 flow. Second operand 4 states and 791 transitions. [2023-08-27 14:38:12,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 73 transitions, 407 flow [2023-08-27 14:38:12,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 402 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:38:12,791 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 178 flow [2023-08-27 14:38:12,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=178, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-27 14:38:12,791 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2023-08-27 14:38:12,791 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 178 flow [2023-08-27 14:38:12,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 186.5) internal successors, (746), 4 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:12,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:12,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:12,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 14:38:12,792 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:12,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:12,793 INFO L85 PathProgramCache]: Analyzing trace with hash 869473319, now seen corresponding path program 1 times [2023-08-27 14:38:12,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:12,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531594816] [2023-08-27 14:38:12,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:12,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:12,828 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 14:38:12,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:12,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531594816] [2023-08-27 14:38:12,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531594816] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:12,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309448131] [2023-08-27 14:38:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:12,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:12,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:12,833 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 14:38:12,844 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 14:38:12,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:12,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-27 14:38:12,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:12,936 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 14:38:12,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:12,951 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 14:38:12,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309448131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:12,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:12,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 14:38:12,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302698405] [2023-08-27 14:38:12,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:12,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 14:38:12,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:12,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 14:38:12,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 14:38:12,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 441 [2023-08-27 14:38:12,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 178 flow. Second operand has 7 states, 7 states have (on average 191.42857142857142) internal successors, (1340), 7 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:12,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:12,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 441 [2023-08-27 14:38:12,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:13,575 INFO L124 PetriNetUnfolderBase]: 6681/8658 cut-off events. [2023-08-27 14:38:13,575 INFO L125 PetriNetUnfolderBase]: For 2672/2837 co-relation queries the response was YES. [2023-08-27 14:38:13,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22995 conditions, 8658 events. 6681/8658 cut-off events. For 2672/2837 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 38000 event pairs, 906 based on Foata normal form. 165/6912 useless extension candidates. Maximal degree in co-relation 22980. Up to 2796 conditions per place. [2023-08-27 14:38:13,668 INFO L140 encePairwiseOnDemand]: 433/441 looper letters, 131 selfloop transitions, 18 changer transitions 0/152 dead transitions. [2023-08-27 14:38:13,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 152 transitions, 838 flow [2023-08-27 14:38:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 14:38:13,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 14:38:13,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1453 transitions. [2023-08-27 14:38:13,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.470683511499838 [2023-08-27 14:38:13,671 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1453 transitions. [2023-08-27 14:38:13,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1453 transitions. [2023-08-27 14:38:13,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:13,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1453 transitions. [2023-08-27 14:38:13,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 207.57142857142858) internal successors, (1453), 7 states have internal predecessors, (1453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:13,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 441.0) internal successors, (3528), 8 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:13,679 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 441.0) internal successors, (3528), 8 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:13,679 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 178 flow. Second operand 7 states and 1453 transitions. [2023-08-27 14:38:13,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 152 transitions, 838 flow [2023-08-27 14:38:13,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 152 transitions, 822 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 14:38:13,692 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 301 flow [2023-08-27 14:38:13,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=301, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2023-08-27 14:38:13,694 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2023-08-27 14:38:13,694 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 301 flow [2023-08-27 14:38:13,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 191.42857142857142) internal successors, (1340), 7 states have internal predecessors, (1340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:13,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:13,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:13,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 14:38:13,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:13,913 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:13,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:13,913 INFO L85 PathProgramCache]: Analyzing trace with hash 869473292, now seen corresponding path program 1 times [2023-08-27 14:38:13,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:13,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047949701] [2023-08-27 14:38:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:13,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:13,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:13,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047949701] [2023-08-27 14:38:13,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047949701] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:13,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:13,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:38:13,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399058334] [2023-08-27 14:38:13,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:13,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:13,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:13,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:38:13,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 441 [2023-08-27 14:38:13,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 301 flow. Second operand has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:13,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:13,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 441 [2023-08-27 14:38:13,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:14,490 INFO L124 PetriNetUnfolderBase]: 5662/7455 cut-off events. [2023-08-27 14:38:14,490 INFO L125 PetriNetUnfolderBase]: For 5093/5243 co-relation queries the response was YES. [2023-08-27 14:38:14,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21358 conditions, 7455 events. 5662/7455 cut-off events. For 5093/5243 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 33224 event pairs, 976 based on Foata normal form. 702/6312 useless extension candidates. Maximal degree in co-relation 21341. Up to 6429 conditions per place. [2023-08-27 14:38:14,511 INFO L140 encePairwiseOnDemand]: 437/441 looper letters, 60 selfloop transitions, 6 changer transitions 0/69 dead transitions. [2023-08-27 14:38:14,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 433 flow [2023-08-27 14:38:14,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:14,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:14,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 613 transitions. [2023-08-27 14:38:14,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633408919123205 [2023-08-27 14:38:14,513 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 613 transitions. [2023-08-27 14:38:14,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 613 transitions. [2023-08-27 14:38:14,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:14,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 613 transitions. [2023-08-27 14:38:14,514 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:14,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:14,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:14,517 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 301 flow. Second operand 3 states and 613 transitions. [2023-08-27 14:38:14,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 433 flow [2023-08-27 14:38:14,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 69 transitions, 418 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-27 14:38:14,525 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 242 flow [2023-08-27 14:38:14,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2023-08-27 14:38:14,526 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2023-08-27 14:38:14,526 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 242 flow [2023-08-27 14:38:14,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.33333333333334) internal successors, (577), 3 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:14,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:14,526 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:14,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 14:38:14,526 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:14,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:14,527 INFO L85 PathProgramCache]: Analyzing trace with hash 345313384, now seen corresponding path program 1 times [2023-08-27 14:38:14,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:14,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108612047] [2023-08-27 14:38:14,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:14,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:38:14,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:14,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108612047] [2023-08-27 14:38:14,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108612047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:14,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245481522] [2023-08-27 14:38:14,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:14,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:14,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:14,570 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 14:38:14,590 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 14:38:14,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:14,679 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 14:38:14,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:14,756 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 14:38:14,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:14,835 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 14:38:14,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245481522] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:14,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:14,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 7] total 15 [2023-08-27 14:38:14,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106056516] [2023-08-27 14:38:14,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:14,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 14:38:14,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:14,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 14:38:14,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-08-27 14:38:14,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 441 [2023-08-27 14:38:14,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 242 flow. Second operand has 15 states, 15 states have (on average 164.8) internal successors, (2472), 15 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:14,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:14,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 441 [2023-08-27 14:38:14,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:16,002 INFO L124 PetriNetUnfolderBase]: 11017/14444 cut-off events. [2023-08-27 14:38:16,002 INFO L125 PetriNetUnfolderBase]: For 12093/12433 co-relation queries the response was YES. [2023-08-27 14:38:16,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40966 conditions, 14444 events. 11017/14444 cut-off events. For 12093/12433 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 69475 event pairs, 2875 based on Foata normal form. 486/11542 useless extension candidates. Maximal degree in co-relation 40948. Up to 4125 conditions per place. [2023-08-27 14:38:16,057 INFO L140 encePairwiseOnDemand]: 432/441 looper letters, 171 selfloop transitions, 17 changer transitions 0/190 dead transitions. [2023-08-27 14:38:16,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 190 transitions, 1297 flow [2023-08-27 14:38:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 14:38:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 14:38:16,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1763 transitions. [2023-08-27 14:38:16,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997732426303855 [2023-08-27 14:38:16,061 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1763 transitions. [2023-08-27 14:38:16,061 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1763 transitions. [2023-08-27 14:38:16,062 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:16,062 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1763 transitions. [2023-08-27 14:38:16,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 176.3) internal successors, (1763), 10 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:16,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 441.0) internal successors, (4851), 11 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:16,074 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 441.0) internal successors, (4851), 11 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:16,074 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 242 flow. Second operand 10 states and 1763 transitions. [2023-08-27 14:38:16,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 190 transitions, 1297 flow [2023-08-27 14:38:16,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 190 transitions, 1235 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 14:38:16,116 INFO L231 Difference]: Finished difference. Result has 68 places, 59 transitions, 310 flow [2023-08-27 14:38:16,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=310, PETRI_PLACES=68, PETRI_TRANSITIONS=59} [2023-08-27 14:38:16,117 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 16 predicate places. [2023-08-27 14:38:16,117 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 59 transitions, 310 flow [2023-08-27 14:38:16,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 164.8) internal successors, (2472), 15 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:16,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:16,118 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1] [2023-08-27 14:38:16,123 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 14:38:16,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:16,323 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:16,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:16,324 INFO L85 PathProgramCache]: Analyzing trace with hash 368213139, now seen corresponding path program 2 times [2023-08-27 14:38:16,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:16,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164690777] [2023-08-27 14:38:16,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:16,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:38:16,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:16,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164690777] [2023-08-27 14:38:16,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164690777] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:16,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243640876] [2023-08-27 14:38:16,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:38:16,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:16,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:16,485 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 14:38:16,488 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 14:38:16,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 14:38:16,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:38:16,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 14:38:16,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 14:38:16,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 14:38:16,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243640876] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:16,632 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:16,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 2, 2] total 13 [2023-08-27 14:38:16,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320352772] [2023-08-27 14:38:16,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:16,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 14:38:16,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:16,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 14:38:16,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-27 14:38:16,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 441 [2023-08-27 14:38:16,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 59 transitions, 310 flow. Second operand has 14 states, 14 states have (on average 165.21428571428572) internal successors, (2313), 14 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:16,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:16,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 441 [2023-08-27 14:38:16,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:18,416 INFO L124 PetriNetUnfolderBase]: 16556/21796 cut-off events. [2023-08-27 14:38:18,416 INFO L125 PetriNetUnfolderBase]: For 21797/22311 co-relation queries the response was YES. [2023-08-27 14:38:18,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65365 conditions, 21796 events. 16556/21796 cut-off events. For 21797/22311 co-relation queries the response was YES. Maximal size of possible extension queue 663. Compared 111283 event pairs, 3352 based on Foata normal form. 660/17488 useless extension candidates. Maximal degree in co-relation 65344. Up to 4683 conditions per place. [2023-08-27 14:38:18,503 INFO L140 encePairwiseOnDemand]: 432/441 looper letters, 186 selfloop transitions, 29 changer transitions 0/217 dead transitions. [2023-08-27 14:38:18,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 217 transitions, 1498 flow [2023-08-27 14:38:18,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 14:38:18,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 14:38:18,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2265 transitions. [2023-08-27 14:38:18,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39508110936682367 [2023-08-27 14:38:18,508 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2265 transitions. [2023-08-27 14:38:18,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2265 transitions. [2023-08-27 14:38:18,510 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:18,510 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2265 transitions. [2023-08-27 14:38:18,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 174.23076923076923) internal successors, (2265), 13 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:18,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 441.0) internal successors, (6174), 14 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:18,519 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 441.0) internal successors, (6174), 14 states have internal predecessors, (6174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:18,520 INFO L175 Difference]: Start difference. First operand has 68 places, 59 transitions, 310 flow. Second operand 13 states and 2265 transitions. [2023-08-27 14:38:18,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 217 transitions, 1498 flow [2023-08-27 14:38:18,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 217 transitions, 1480 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-27 14:38:18,556 INFO L231 Difference]: Finished difference. Result has 78 places, 66 transitions, 419 flow [2023-08-27 14:38:18,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=419, PETRI_PLACES=78, PETRI_TRANSITIONS=66} [2023-08-27 14:38:18,556 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 26 predicate places. [2023-08-27 14:38:18,556 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 66 transitions, 419 flow [2023-08-27 14:38:18,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 165.21428571428572) internal successors, (2313), 14 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:18,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:18,557 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:18,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-27 14:38:18,762 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,SelfDestructingSolverStorable14 [2023-08-27 14:38:18,763 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:18,763 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:18,763 INFO L85 PathProgramCache]: Analyzing trace with hash 555968111, now seen corresponding path program 2 times [2023-08-27 14:38:18,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:18,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414698048] [2023-08-27 14:38:18,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:18,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:18,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-27 14:38:18,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:18,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414698048] [2023-08-27 14:38:18,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414698048] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:18,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:18,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 14:38:18,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889979267] [2023-08-27 14:38:18,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:18,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:18,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:18,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:18,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:38:18,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 441 [2023-08-27 14:38:18,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 66 transitions, 419 flow. Second operand has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:18,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:18,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 441 [2023-08-27 14:38:18,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:19,829 INFO L124 PetriNetUnfolderBase]: 13136/17547 cut-off events. [2023-08-27 14:38:19,830 INFO L125 PetriNetUnfolderBase]: For 27735/28328 co-relation queries the response was YES. [2023-08-27 14:38:19,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58246 conditions, 17547 events. 13136/17547 cut-off events. For 27735/28328 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 89088 event pairs, 8101 based on Foata normal form. 845/15140 useless extension candidates. Maximal degree in co-relation 58222. Up to 17531 conditions per place. [2023-08-27 14:38:19,905 INFO L140 encePairwiseOnDemand]: 439/441 looper letters, 59 selfloop transitions, 1 changer transitions 0/65 dead transitions. [2023-08-27 14:38:19,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 65 transitions, 529 flow [2023-08-27 14:38:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2023-08-27 14:38:19,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46485260770975056 [2023-08-27 14:38:19,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2023-08-27 14:38:19,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2023-08-27 14:38:19,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:19,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2023-08-27 14:38:19,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:19,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:19,911 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:19,911 INFO L175 Difference]: Start difference. First operand has 78 places, 66 transitions, 419 flow. Second operand 3 states and 615 transitions. [2023-08-27 14:38:19,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 65 transitions, 529 flow [2023-08-27 14:38:19,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 65 transitions, 495 flow, removed 7 selfloop flow, removed 6 redundant places. [2023-08-27 14:38:19,955 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 377 flow [2023-08-27 14:38:19,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=377, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2023-08-27 14:38:19,955 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 21 predicate places. [2023-08-27 14:38:19,955 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 377 flow [2023-08-27 14:38:19,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:19,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:19,956 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:19,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-27 14:38:19,956 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:19,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:19,957 INFO L85 PathProgramCache]: Analyzing trace with hash 55142170, now seen corresponding path program 1 times [2023-08-27 14:38:19,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:19,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366864859] [2023-08-27 14:38:19,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:19,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:20,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:20,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366864859] [2023-08-27 14:38:20,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366864859] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:20,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054658788] [2023-08-27 14:38:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:20,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:20,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:20,058 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 14:38:20,061 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 14:38:20,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:20,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 14:38:20,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:20,285 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:20,286 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:20,334 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:20,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054658788] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:20,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:20,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 14:38:20,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966263076] [2023-08-27 14:38:20,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:20,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 14:38:20,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:20,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 14:38:20,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 14:38:20,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 441 [2023-08-27 14:38:20,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 377 flow. Second operand has 13 states, 13 states have (on average 191.3846153846154) internal successors, (2488), 13 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:20,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:20,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 441 [2023-08-27 14:38:20,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:24,105 INFO L124 PetriNetUnfolderBase]: 34601/45300 cut-off events. [2023-08-27 14:38:24,105 INFO L125 PetriNetUnfolderBase]: For 63789/64123 co-relation queries the response was YES. [2023-08-27 14:38:24,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143846 conditions, 45300 events. 34601/45300 cut-off events. For 63789/64123 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 241284 event pairs, 2651 based on Foata normal form. 1846/36790 useless extension candidates. Maximal degree in co-relation 143822. Up to 8517 conditions per place. [2023-08-27 14:38:24,308 INFO L140 encePairwiseOnDemand]: 436/441 looper letters, 349 selfloop transitions, 28 changer transitions 0/382 dead transitions. [2023-08-27 14:38:24,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 382 transitions, 3097 flow [2023-08-27 14:38:24,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 14:38:24,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 14:38:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2473 transitions. [2023-08-27 14:38:24,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46730914588057443 [2023-08-27 14:38:24,313 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2473 transitions. [2023-08-27 14:38:24,313 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2473 transitions. [2023-08-27 14:38:24,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:24,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2473 transitions. [2023-08-27 14:38:24,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 206.08333333333334) internal successors, (2473), 12 states have internal predecessors, (2473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:24,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 441.0) internal successors, (5733), 13 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:24,324 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 441.0) internal successors, (5733), 13 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:24,324 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 377 flow. Second operand 12 states and 2473 transitions. [2023-08-27 14:38:24,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 382 transitions, 3097 flow [2023-08-27 14:38:24,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 382 transitions, 3096 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:38:24,402 INFO L231 Difference]: Finished difference. Result has 90 places, 84 transitions, 608 flow [2023-08-27 14:38:24,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=608, PETRI_PLACES=90, PETRI_TRANSITIONS=84} [2023-08-27 14:38:24,403 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 38 predicate places. [2023-08-27 14:38:24,403 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 84 transitions, 608 flow [2023-08-27 14:38:24,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 191.3846153846154) internal successors, (2488), 13 states have internal predecessors, (2488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:24,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:24,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:24,409 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 14:38:24,609 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 14:38:24,609 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:24,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:24,609 INFO L85 PathProgramCache]: Analyzing trace with hash -345133436, now seen corresponding path program 1 times [2023-08-27 14:38:24,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:24,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782432538] [2023-08-27 14:38:24,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:24,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:24,888 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 14:38:24,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:24,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782432538] [2023-08-27 14:38:24,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782432538] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:38:24,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:38:24,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 14:38:24,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622248141] [2023-08-27 14:38:24,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:24,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:38:24,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:24,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:38:24,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:38:24,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 441 [2023-08-27 14:38:24,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 84 transitions, 608 flow. Second operand has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:24,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:24,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 441 [2023-08-27 14:38:24,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:28,574 INFO L124 PetriNetUnfolderBase]: 34182/44781 cut-off events. [2023-08-27 14:38:28,574 INFO L125 PetriNetUnfolderBase]: For 85254/85849 co-relation queries the response was YES. [2023-08-27 14:38:28,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157144 conditions, 44781 events. 34182/44781 cut-off events. For 85254/85849 co-relation queries the response was YES. Maximal size of possible extension queue 762. Compared 237510 event pairs, 5944 based on Foata normal form. 597/35183 useless extension candidates. Maximal degree in co-relation 157114. Up to 44240 conditions per place. [2023-08-27 14:38:28,835 INFO L140 encePairwiseOnDemand]: 434/441 looper letters, 91 selfloop transitions, 7 changer transitions 1/105 dead transitions. [2023-08-27 14:38:28,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 105 transitions, 899 flow [2023-08-27 14:38:28,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:38:28,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:38:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 613 transitions. [2023-08-27 14:38:28,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4633408919123205 [2023-08-27 14:38:28,837 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 613 transitions. [2023-08-27 14:38:28,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 613 transitions. [2023-08-27 14:38:28,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:28,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 613 transitions. [2023-08-27 14:38:28,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:28,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:28,840 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:28,841 INFO L175 Difference]: Start difference. First operand has 90 places, 84 transitions, 608 flow. Second operand 3 states and 613 transitions. [2023-08-27 14:38:28,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 105 transitions, 899 flow [2023-08-27 14:38:29,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 105 transitions, 861 flow, removed 14 selfloop flow, removed 3 redundant places. [2023-08-27 14:38:29,150 INFO L231 Difference]: Finished difference. Result has 90 places, 87 transitions, 612 flow [2023-08-27 14:38:29,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=612, PETRI_PLACES=90, PETRI_TRANSITIONS=87} [2023-08-27 14:38:29,150 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 38 predicate places. [2023-08-27 14:38:29,150 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 87 transitions, 612 flow [2023-08-27 14:38:29,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:29,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:29,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:29,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-27 14:38:29,151 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:29,151 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:29,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1441723798, now seen corresponding path program 1 times [2023-08-27 14:38:29,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:29,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895588973] [2023-08-27 14:38:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:29,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:29,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:29,313 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 14:38:29,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:29,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895588973] [2023-08-27 14:38:29,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895588973] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:29,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827765960] [2023-08-27 14:38:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:29,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:29,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:29,315 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 14:38:29,325 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 14:38:29,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:29,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 14:38:29,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:29,648 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 14:38:29,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:29,799 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 14:38:29,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827765960] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:29,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:29,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-27 14:38:29,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42334976] [2023-08-27 14:38:29,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:29,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 14:38:29,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:29,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 14:38:29,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-08-27 14:38:29,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 441 [2023-08-27 14:38:29,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 87 transitions, 612 flow. Second operand has 14 states, 14 states have (on average 162.85714285714286) internal successors, (2280), 14 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:29,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:29,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 441 [2023-08-27 14:38:29,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:33,687 INFO L124 PetriNetUnfolderBase]: 32637/43877 cut-off events. [2023-08-27 14:38:33,688 INFO L125 PetriNetUnfolderBase]: For 105000/105943 co-relation queries the response was YES. [2023-08-27 14:38:33,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163524 conditions, 43877 events. 32637/43877 cut-off events. For 105000/105943 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 238521 event pairs, 19782 based on Foata normal form. 1199/44408 useless extension candidates. Maximal degree in co-relation 163492. Up to 40977 conditions per place. [2023-08-27 14:38:33,956 INFO L140 encePairwiseOnDemand]: 435/441 looper letters, 164 selfloop transitions, 6 changer transitions 2/177 dead transitions. [2023-08-27 14:38:33,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 177 transitions, 1590 flow [2023-08-27 14:38:33,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:38:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:38:33,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1020 transitions. [2023-08-27 14:38:33,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3854875283446712 [2023-08-27 14:38:33,958 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1020 transitions. [2023-08-27 14:38:33,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1020 transitions. [2023-08-27 14:38:33,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:33,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1020 transitions. [2023-08-27 14:38:33,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 170.0) internal successors, (1020), 6 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:33,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 441.0) internal successors, (3087), 7 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 14:38:33,964 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 441.0) internal successors, (3087), 7 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 14:38:33,964 INFO L175 Difference]: Start difference. First operand has 90 places, 87 transitions, 612 flow. Second operand 6 states and 1020 transitions. [2023-08-27 14:38:33,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 177 transitions, 1590 flow [2023-08-27 14:38:34,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 177 transitions, 1581 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:38:34,170 INFO L231 Difference]: Finished difference. Result has 96 places, 89 transitions, 634 flow [2023-08-27 14:38:34,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=605, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=96, PETRI_TRANSITIONS=89} [2023-08-27 14:38:34,170 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 44 predicate places. [2023-08-27 14:38:34,170 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 89 transitions, 634 flow [2023-08-27 14:38:34,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 162.85714285714286) internal successors, (2280), 14 states have internal predecessors, (2280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:34,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:34,171 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:34,179 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 14:38:34,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:34,376 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:34,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:34,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1332268989, now seen corresponding path program 2 times [2023-08-27 14:38:34,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:34,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245617649] [2023-08-27 14:38:34,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:34,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:34,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:34,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:34,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245617649] [2023-08-27 14:38:34,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245617649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:34,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433763238] [2023-08-27 14:38:34,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:38:34,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:34,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:34,526 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 14:38:34,529 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 14:38:34,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:38:34,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:38:34,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 14:38:34,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:34,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:34,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:34,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:34,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433763238] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:34,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:38:34,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2023-08-27 14:38:34,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123211348] [2023-08-27 14:38:34,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:34,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 14:38:34,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:34,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 14:38:34,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-27 14:38:34,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 441 [2023-08-27 14:38:34,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 89 transitions, 634 flow. Second operand has 6 states, 6 states have (on average 166.5) internal successors, (999), 6 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:34,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:34,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 441 [2023-08-27 14:38:34,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:38,793 INFO L124 PetriNetUnfolderBase]: 33950/44941 cut-off events. [2023-08-27 14:38:38,794 INFO L125 PetriNetUnfolderBase]: For 132064/132979 co-relation queries the response was YES. [2023-08-27 14:38:38,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176271 conditions, 44941 events. 33950/44941 cut-off events. For 132064/132979 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 235777 event pairs, 7603 based on Foata normal form. 1929/46168 useless extension candidates. Maximal degree in co-relation 176236. Up to 22431 conditions per place. [2023-08-27 14:38:39,090 INFO L140 encePairwiseOnDemand]: 433/441 looper letters, 157 selfloop transitions, 17 changer transitions 1/178 dead transitions. [2023-08-27 14:38:39,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 178 transitions, 1613 flow [2023-08-27 14:38:39,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:38:39,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:38:39,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1047 transitions. [2023-08-27 14:38:39,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956916099773243 [2023-08-27 14:38:39,092 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1047 transitions. [2023-08-27 14:38:39,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1047 transitions. [2023-08-27 14:38:39,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:39,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1047 transitions. [2023-08-27 14:38:39,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 174.5) internal successors, (1047), 6 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:39,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 441.0) internal successors, (3087), 7 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 14:38:39,097 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 441.0) internal successors, (3087), 7 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 14:38:39,097 INFO L175 Difference]: Start difference. First operand has 96 places, 89 transitions, 634 flow. Second operand 6 states and 1047 transitions. [2023-08-27 14:38:39,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 178 transitions, 1613 flow [2023-08-27 14:38:39,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 178 transitions, 1606 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 14:38:39,315 INFO L231 Difference]: Finished difference. Result has 99 places, 88 transitions, 674 flow [2023-08-27 14:38:39,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=674, PETRI_PLACES=99, PETRI_TRANSITIONS=88} [2023-08-27 14:38:39,315 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 47 predicate places. [2023-08-27 14:38:39,315 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 88 transitions, 674 flow [2023-08-27 14:38:39,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 166.5) internal successors, (999), 6 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:39,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:39,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:39,321 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 14:38:39,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:39,517 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:39,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:39,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1545323983, now seen corresponding path program 1 times [2023-08-27 14:38:39,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:39,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764768056] [2023-08-27 14:38:39,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:39,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:39,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:39,691 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 14:38:39,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:39,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764768056] [2023-08-27 14:38:39,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764768056] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:39,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006515305] [2023-08-27 14:38:39,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:39,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:39,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:39,693 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 14:38:39,716 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 14:38:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:39,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 14:38:39,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:39,876 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 14:38:39,877 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:39,922 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 14:38:39,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006515305] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:39,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:39,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-27 14:38:39,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456650306] [2023-08-27 14:38:39,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:39,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 14:38:39,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:39,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 14:38:39,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-08-27 14:38:39,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 441 [2023-08-27 14:38:39,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 88 transitions, 674 flow. Second operand has 13 states, 13 states have (on average 160.84615384615384) internal successors, (2091), 13 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:39,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:39,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 441 [2023-08-27 14:38:39,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:43,408 INFO L124 PetriNetUnfolderBase]: 27767/37129 cut-off events. [2023-08-27 14:38:43,409 INFO L125 PetriNetUnfolderBase]: For 139188/141254 co-relation queries the response was YES. [2023-08-27 14:38:43,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153693 conditions, 37129 events. 27767/37129 cut-off events. For 139188/141254 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 188168 event pairs, 16996 based on Foata normal form. 2088/38539 useless extension candidates. Maximal degree in co-relation 153657. Up to 36953 conditions per place. [2023-08-27 14:38:43,819 INFO L140 encePairwiseOnDemand]: 435/441 looper letters, 77 selfloop transitions, 3 changer transitions 26/109 dead transitions. [2023-08-27 14:38:43,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 109 transitions, 962 flow [2023-08-27 14:38:43,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 14:38:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 14:38:43,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1006 transitions. [2023-08-27 14:38:43,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3801965230536659 [2023-08-27 14:38:43,822 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1006 transitions. [2023-08-27 14:38:43,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1006 transitions. [2023-08-27 14:38:43,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:43,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1006 transitions. [2023-08-27 14:38:43,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 167.66666666666666) internal successors, (1006), 6 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:43,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 441.0) internal successors, (3087), 7 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 14:38:43,825 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 441.0) internal successors, (3087), 7 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 14:38:43,825 INFO L175 Difference]: Start difference. First operand has 99 places, 88 transitions, 674 flow. Second operand 6 states and 1006 transitions. [2023-08-27 14:38:43,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 109 transitions, 962 flow [2023-08-27 14:38:43,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 109 transitions, 926 flow, removed 8 selfloop flow, removed 4 redundant places. [2023-08-27 14:38:43,976 INFO L231 Difference]: Finished difference. Result has 102 places, 83 transitions, 606 flow [2023-08-27 14:38:43,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=606, PETRI_PLACES=102, PETRI_TRANSITIONS=83} [2023-08-27 14:38:43,977 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 50 predicate places. [2023-08-27 14:38:43,977 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 83 transitions, 606 flow [2023-08-27 14:38:43,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 160.84615384615384) internal successors, (2091), 13 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:43,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:43,977 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:43,982 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 14:38:44,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-27 14:38:44,178 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:44,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:44,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1792874227, now seen corresponding path program 1 times [2023-08-27 14:38:44,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:44,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585313572] [2023-08-27 14:38:44,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:44,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:38:44,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:44,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585313572] [2023-08-27 14:38:44,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585313572] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:44,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668383259] [2023-08-27 14:38:44,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:44,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:44,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:44,311 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 14:38:44,314 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 14:38:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:44,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 14:38:44,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:44,532 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:38:44,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:38:44,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668383259] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:44,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:44,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-08-27 14:38:44,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092049960] [2023-08-27 14:38:44,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:44,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 14:38:44,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:44,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 14:38:44,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-08-27 14:38:44,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 441 [2023-08-27 14:38:44,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 83 transitions, 606 flow. Second operand has 17 states, 17 states have (on average 151.52941176470588) internal successors, (2576), 17 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:44,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:44,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 441 [2023-08-27 14:38:44,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:48,172 INFO L124 PetriNetUnfolderBase]: 28076/37647 cut-off events. [2023-08-27 14:38:48,172 INFO L125 PetriNetUnfolderBase]: For 101048/103119 co-relation queries the response was YES. [2023-08-27 14:38:48,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149571 conditions, 37647 events. 28076/37647 cut-off events. For 101048/103119 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 192585 event pairs, 15493 based on Foata normal form. 2135/39084 useless extension candidates. Maximal degree in co-relation 149533. Up to 33954 conditions per place. [2023-08-27 14:38:48,436 INFO L140 encePairwiseOnDemand]: 432/441 looper letters, 156 selfloop transitions, 12 changer transitions 0/171 dead transitions. [2023-08-27 14:38:48,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 171 transitions, 1534 flow [2023-08-27 14:38:48,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 14:38:48,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 14:38:48,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1420 transitions. [2023-08-27 14:38:48,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777273872511967 [2023-08-27 14:38:48,439 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1420 transitions. [2023-08-27 14:38:48,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1420 transitions. [2023-08-27 14:38:48,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:48,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1420 transitions. [2023-08-27 14:38:48,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 157.77777777777777) internal successors, (1420), 9 states have internal predecessors, (1420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:48,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 441.0) internal successors, (4410), 10 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:48,444 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 441.0) internal successors, (4410), 10 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:48,444 INFO L175 Difference]: Start difference. First operand has 102 places, 83 transitions, 606 flow. Second operand 9 states and 1420 transitions. [2023-08-27 14:38:48,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 171 transitions, 1534 flow [2023-08-27 14:38:49,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 171 transitions, 1434 flow, removed 27 selfloop flow, removed 10 redundant places. [2023-08-27 14:38:49,258 INFO L231 Difference]: Finished difference. Result has 96 places, 86 transitions, 613 flow [2023-08-27 14:38:49,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=613, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2023-08-27 14:38:49,258 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 44 predicate places. [2023-08-27 14:38:49,258 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 613 flow [2023-08-27 14:38:49,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 151.52941176470588) internal successors, (2576), 17 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:49,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:49,259 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:49,264 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 14:38:49,459 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,SelfDestructingSolverStorable21 [2023-08-27 14:38:49,460 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:49,460 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:49,460 INFO L85 PathProgramCache]: Analyzing trace with hash -866958537, now seen corresponding path program 2 times [2023-08-27 14:38:49,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:49,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609500599] [2023-08-27 14:38:49,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:49,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:49,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:49,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:49,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609500599] [2023-08-27 14:38:49,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609500599] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:49,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749848746] [2023-08-27 14:38:49,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:38:49,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:49,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:49,613 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 14:38:49,640 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 14:38:49,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:38:49,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:38:49,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 14:38:49,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:49,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:49,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:49,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:38:49,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749848746] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:49,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:38:49,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 16 [2023-08-27 14:38:49,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923537571] [2023-08-27 14:38:49,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:38:49,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:38:49,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:38:49,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2023-08-27 14:38:49,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 441 [2023-08-27 14:38:49,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 613 flow. Second operand has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:49,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:49,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 441 [2023-08-27 14:38:49,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:38:55,042 INFO L124 PetriNetUnfolderBase]: 42540/56823 cut-off events. [2023-08-27 14:38:55,043 INFO L125 PetriNetUnfolderBase]: For 158098/161087 co-relation queries the response was YES. [2023-08-27 14:38:55,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217340 conditions, 56823 events. 42540/56823 cut-off events. For 158098/161087 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 312415 event pairs, 4993 based on Foata normal form. 3045/58830 useless extension candidates. Maximal degree in co-relation 217306. Up to 22324 conditions per place. [2023-08-27 14:38:55,414 INFO L140 encePairwiseOnDemand]: 430/441 looper letters, 214 selfloop transitions, 74 changer transitions 0/291 dead transitions. [2023-08-27 14:38:55,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 291 transitions, 2663 flow [2023-08-27 14:38:55,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 14:38:55,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 14:38:55,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1599 transitions. [2023-08-27 14:38:55,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3625850340136054 [2023-08-27 14:38:55,416 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1599 transitions. [2023-08-27 14:38:55,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1599 transitions. [2023-08-27 14:38:55,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:38:55,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1599 transitions. [2023-08-27 14:38:55,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 159.9) internal successors, (1599), 10 states have internal predecessors, (1599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:55,420 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 441.0) internal successors, (4851), 11 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:55,421 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 441.0) internal successors, (4851), 11 states have internal predecessors, (4851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:55,421 INFO L175 Difference]: Start difference. First operand has 96 places, 86 transitions, 613 flow. Second operand 10 states and 1599 transitions. [2023-08-27 14:38:55,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 291 transitions, 2663 flow [2023-08-27 14:38:55,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 291 transitions, 2632 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-27 14:38:55,736 INFO L231 Difference]: Finished difference. Result has 103 places, 136 transitions, 1242 flow [2023-08-27 14:38:55,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1242, PETRI_PLACES=103, PETRI_TRANSITIONS=136} [2023-08-27 14:38:55,737 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 51 predicate places. [2023-08-27 14:38:55,737 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 136 transitions, 1242 flow [2023-08-27 14:38:55,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:55,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:38:55,737 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:38:55,743 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 14:38:55,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:55,943 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:38:55,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:38:55,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1172108731, now seen corresponding path program 3 times [2023-08-27 14:38:55,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:38:55,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404611411] [2023-08-27 14:38:55,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:38:55,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:38:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:38:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:38:56,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:38:56,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404611411] [2023-08-27 14:38:56,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404611411] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:38:56,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392787601] [2023-08-27 14:38:56,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 14:38:56,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:38:56,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:38:56,100 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 14:38:56,101 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 14:38:56,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 14:38:56,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:38:56,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 14:38:56,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:38:56,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:38:56,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:38:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:38:56,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392787601] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:38:56,460 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:38:56,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2023-08-27 14:38:56,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371937548] [2023-08-27 14:38:56,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:38:56,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 14:38:56,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:38:56,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 14:38:56,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-27 14:38:56,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 441 [2023-08-27 14:38:56,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 136 transitions, 1242 flow. Second operand has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:38:56,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:38:56,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 441 [2023-08-27 14:38:56,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:39:04,935 INFO L124 PetriNetUnfolderBase]: 63938/86365 cut-off events. [2023-08-27 14:39:04,935 INFO L125 PetriNetUnfolderBase]: For 360077/364770 co-relation queries the response was YES. [2023-08-27 14:39:05,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397659 conditions, 86365 events. 63938/86365 cut-off events. For 360077/364770 co-relation queries the response was YES. Maximal size of possible extension queue 1307. Compared 508724 event pairs, 14559 based on Foata normal form. 4757/89504 useless extension candidates. Maximal degree in co-relation 397621. Up to 52852 conditions per place. [2023-08-27 14:39:05,601 INFO L140 encePairwiseOnDemand]: 429/441 looper letters, 275 selfloop transitions, 98 changer transitions 0/376 dead transitions. [2023-08-27 14:39:05,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 376 transitions, 3967 flow [2023-08-27 14:39:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 14:39:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 14:39:05,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1911 transitions. [2023-08-27 14:39:05,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3611111111111111 [2023-08-27 14:39:05,603 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1911 transitions. [2023-08-27 14:39:05,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1911 transitions. [2023-08-27 14:39:05,604 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:39:05,604 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1911 transitions. [2023-08-27 14:39:05,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 159.25) internal successors, (1911), 12 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:05,607 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 441.0) internal successors, (5733), 13 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:05,608 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 441.0) internal successors, (5733), 13 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:05,608 INFO L175 Difference]: Start difference. First operand has 103 places, 136 transitions, 1242 flow. Second operand 12 states and 1911 transitions. [2023-08-27 14:39:05,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 376 transitions, 3967 flow [2023-08-27 14:39:27,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 376 transitions, 3902 flow, removed 30 selfloop flow, removed 3 redundant places. [2023-08-27 14:39:27,784 INFO L231 Difference]: Finished difference. Result has 116 places, 217 transitions, 2453 flow [2023-08-27 14:39:27,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2453, PETRI_PLACES=116, PETRI_TRANSITIONS=217} [2023-08-27 14:39:27,785 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 64 predicate places. [2023-08-27 14:39:27,785 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 217 transitions, 2453 flow [2023-08-27 14:39:27,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 152.0) internal successors, (2736), 18 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:27,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:39:27,786 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:39:27,790 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 14:39:27,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:39:27,986 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:39:27,986 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:39:27,987 INFO L85 PathProgramCache]: Analyzing trace with hash -137519113, now seen corresponding path program 4 times [2023-08-27 14:39:27,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:39:27,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317035906] [2023-08-27 14:39:27,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:39:27,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:39:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:39:28,111 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:39:28,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:39:28,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317035906] [2023-08-27 14:39:28,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317035906] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:39:28,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044991254] [2023-08-27 14:39:28,112 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 14:39:28,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:39:28,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:39:28,113 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 14:39:28,117 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 14:39:28,225 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 14:39:28,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:39:28,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 14:39:28,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:39:28,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:39:28,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:39:28,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:39:28,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044991254] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:39:28,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:39:28,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 16 [2023-08-27 14:39:28,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413220582] [2023-08-27 14:39:28,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:39:28,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:39:28,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:39:28,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:39:28,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-08-27 14:39:28,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 441 [2023-08-27 14:39:28,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 217 transitions, 2453 flow. Second operand has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:28,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:39:28,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 441 [2023-08-27 14:39:28,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:39:37,595 INFO L124 PetriNetUnfolderBase]: 64626/87389 cut-off events. [2023-08-27 14:39:37,595 INFO L125 PetriNetUnfolderBase]: For 442700/447453 co-relation queries the response was YES. [2023-08-27 14:39:38,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442008 conditions, 87389 events. 64626/87389 cut-off events. For 442700/447453 co-relation queries the response was YES. Maximal size of possible extension queue 1308. Compared 515144 event pairs, 10367 based on Foata normal form. 4817/90564 useless extension candidates. Maximal degree in co-relation 441965. Up to 35818 conditions per place. [2023-08-27 14:39:38,686 INFO L140 encePairwiseOnDemand]: 429/441 looper letters, 248 selfloop transitions, 107 changer transitions 0/358 dead transitions. [2023-08-27 14:39:38,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 358 transitions, 4256 flow [2023-08-27 14:39:38,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 14:39:38,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 14:39:38,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1443 transitions. [2023-08-27 14:39:38,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.363567649281935 [2023-08-27 14:39:38,688 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1443 transitions. [2023-08-27 14:39:38,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1443 transitions. [2023-08-27 14:39:38,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:39:38,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1443 transitions. [2023-08-27 14:39:38,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 160.33333333333334) internal successors, (1443), 9 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:38,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 441.0) internal successors, (4410), 10 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:38,692 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 441.0) internal successors, (4410), 10 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:38,692 INFO L175 Difference]: Start difference. First operand has 116 places, 217 transitions, 2453 flow. Second operand 9 states and 1443 transitions. [2023-08-27 14:39:38,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 358 transitions, 4256 flow [2023-08-27 14:39:53,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 358 transitions, 4201 flow, removed 16 selfloop flow, removed 5 redundant places. [2023-08-27 14:39:53,827 INFO L231 Difference]: Finished difference. Result has 123 places, 231 transitions, 2960 flow [2023-08-27 14:39:53,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=2412, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2960, PETRI_PLACES=123, PETRI_TRANSITIONS=231} [2023-08-27 14:39:53,828 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 71 predicate places. [2023-08-27 14:39:53,828 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 231 transitions, 2960 flow [2023-08-27 14:39:53,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:53,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:39:53,828 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:39:53,832 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 14:39:54,029 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,SelfDestructingSolverStorable24 [2023-08-27 14:39:54,029 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:39:54,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:39:54,029 INFO L85 PathProgramCache]: Analyzing trace with hash -325918463, now seen corresponding path program 5 times [2023-08-27 14:39:54,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:39:54,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172098426] [2023-08-27 14:39:54,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:39:54,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:39:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:39:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 14:39:54,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:39:54,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172098426] [2023-08-27 14:39:54,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172098426] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:39:54,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102886326] [2023-08-27 14:39:54,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 14:39:54,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:39:54,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:39:54,173 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 14:39:54,175 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 14:39:54,305 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:39:54,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:39:54,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 14:39:54,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:39:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:39:54,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:39:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:39:54,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102886326] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:39:54,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:39:54,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-08-27 14:39:54,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922242193] [2023-08-27 14:39:54,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:39:54,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 14:39:54,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:39:54,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 14:39:54,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2023-08-27 14:39:54,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 441 [2023-08-27 14:39:54,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 231 transitions, 2960 flow. Second operand has 16 states, 16 states have (on average 142.1875) internal successors, (2275), 16 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:39:54,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:39:54,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 441 [2023-08-27 14:39:54,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:40:05,684 INFO L124 PetriNetUnfolderBase]: 71241/96383 cut-off events. [2023-08-27 14:40:05,684 INFO L125 PetriNetUnfolderBase]: For 562816/562816 co-relation queries the response was YES. [2023-08-27 14:40:06,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528488 conditions, 96383 events. 71241/96383 cut-off events. For 562816/562816 co-relation queries the response was YES. Maximal size of possible extension queue 1188. Compared 546023 event pairs, 4772 based on Foata normal form. 62/94809 useless extension candidates. Maximal degree in co-relation 528441. Up to 42730 conditions per place. [2023-08-27 14:40:06,881 INFO L140 encePairwiseOnDemand]: 428/441 looper letters, 282 selfloop transitions, 356 changer transitions 0/638 dead transitions. [2023-08-27 14:40:06,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 638 transitions, 8470 flow [2023-08-27 14:40:06,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 14:40:06,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 14:40:06,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3113 transitions. [2023-08-27 14:40:06,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3361408055285606 [2023-08-27 14:40:06,884 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3113 transitions. [2023-08-27 14:40:06,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3113 transitions. [2023-08-27 14:40:06,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:40:06,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3113 transitions. [2023-08-27 14:40:06,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 148.23809523809524) internal successors, (3113), 21 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:40:06,891 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 441.0) internal successors, (9702), 22 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:40:06,891 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 441.0) internal successors, (9702), 22 states have internal predecessors, (9702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:40:06,891 INFO L175 Difference]: Start difference. First operand has 123 places, 231 transitions, 2960 flow. Second operand 21 states and 3113 transitions. [2023-08-27 14:40:06,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 638 transitions, 8470 flow [2023-08-27 14:40:39,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 638 transitions, 8441 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-27 14:40:39,352 INFO L231 Difference]: Finished difference. Result has 141 places, 431 transitions, 6264 flow [2023-08-27 14:40:39,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=2929, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6264, PETRI_PLACES=141, PETRI_TRANSITIONS=431} [2023-08-27 14:40:39,353 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 89 predicate places. [2023-08-27 14:40:39,353 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 431 transitions, 6264 flow [2023-08-27 14:40:39,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 142.1875) internal successors, (2275), 16 states have internal predecessors, (2275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:40:39,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:40:39,353 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:40:39,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 14:40:39,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 14:40:39,554 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:40:39,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:40:39,554 INFO L85 PathProgramCache]: Analyzing trace with hash -909354937, now seen corresponding path program 6 times [2023-08-27 14:40:39,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:40:39,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242091558] [2023-08-27 14:40:39,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:40:39,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:40:39,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:40:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:40:39,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:40:39,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242091558] [2023-08-27 14:40:39,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242091558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:40:39,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555981055] [2023-08-27 14:40:39,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 14:40:39,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:40:39,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:40:39,705 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 14:40:39,735 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 14:40:39,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 14:40:39,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:40:39,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 14:40:39,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:40:39,952 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:40:39,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:40:40,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 14:40:40,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555981055] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 14:40:40,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 14:40:40,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 18 [2023-08-27 14:40:40,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586499836] [2023-08-27 14:40:40,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:40:40,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 14:40:40,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:40:40,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 14:40:40,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-08-27 14:40:40,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 441 [2023-08-27 14:40:40,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 431 transitions, 6264 flow. Second operand has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:40:40,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:40:40,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 441 [2023-08-27 14:40:40,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:40:52,720 INFO L124 PetriNetUnfolderBase]: 70071/95282 cut-off events. [2023-08-27 14:40:52,720 INFO L125 PetriNetUnfolderBase]: For 597747/597796 co-relation queries the response was YES. [2023-08-27 14:40:53,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557371 conditions, 95282 events. 70071/95282 cut-off events. For 597747/597796 co-relation queries the response was YES. Maximal size of possible extension queue 1191. Compared 546711 event pairs, 5646 based on Foata normal form. 111/93747 useless extension candidates. Maximal degree in co-relation 557322. Up to 39828 conditions per place. [2023-08-27 14:40:53,767 INFO L140 encePairwiseOnDemand]: 429/441 looper letters, 244 selfloop transitions, 293 changer transitions 0/561 dead transitions. [2023-08-27 14:40:53,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 561 transitions, 8331 flow [2023-08-27 14:40:53,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 14:40:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 14:40:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1438 transitions. [2023-08-27 14:40:53,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36230788611740994 [2023-08-27 14:40:53,769 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1438 transitions. [2023-08-27 14:40:53,769 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1438 transitions. [2023-08-27 14:40:53,769 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:40:53,769 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1438 transitions. [2023-08-27 14:40:53,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 159.77777777777777) internal successors, (1438), 9 states have internal predecessors, (1438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:40:53,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 441.0) internal successors, (4410), 10 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:40:53,772 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 441.0) internal successors, (4410), 10 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:40:53,772 INFO L175 Difference]: Start difference. First operand has 141 places, 431 transitions, 6264 flow. Second operand 9 states and 1438 transitions. [2023-08-27 14:40:53,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 561 transitions, 8331 flow [2023-08-27 14:41:38,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 561 transitions, 8280 flow, removed 4 selfloop flow, removed 6 redundant places. [2023-08-27 14:41:38,503 INFO L231 Difference]: Finished difference. Result has 146 places, 434 transitions, 7156 flow [2023-08-27 14:41:38,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=6213, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7156, PETRI_PLACES=146, PETRI_TRANSITIONS=434} [2023-08-27 14:41:38,503 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 94 predicate places. [2023-08-27 14:41:38,503 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 434 transitions, 7156 flow [2023-08-27 14:41:38,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 152.0) internal successors, (1216), 8 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:38,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:41:38,504 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:41:38,508 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 14:41:38,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-27 14:41:38,704 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:41:38,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:41:38,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1423615717, now seen corresponding path program 1 times [2023-08-27 14:41:38,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:41:38,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401773109] [2023-08-27 14:41:38,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:41:38,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:41:38,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:41:38,756 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:41:38,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:41:38,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401773109] [2023-08-27 14:41:38,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401773109] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 14:41:38,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 14:41:38,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 14:41:38,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218950174] [2023-08-27 14:41:38,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 14:41:38,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 14:41:38,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:41:38,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 14:41:38,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 14:41:38,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 196 out of 441 [2023-08-27 14:41:38,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 434 transitions, 7156 flow. Second operand has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:38,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:41:38,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 196 of 441 [2023-08-27 14:41:38,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:41:51,231 INFO L124 PetriNetUnfolderBase]: 62260/86561 cut-off events. [2023-08-27 14:41:51,231 INFO L125 PetriNetUnfolderBase]: For 756919/763229 co-relation queries the response was YES. [2023-08-27 14:41:51,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 564817 conditions, 86561 events. 62260/86561 cut-off events. For 756919/763229 co-relation queries the response was YES. Maximal size of possible extension queue 1229. Compared 524948 event pairs, 19516 based on Foata normal form. 6421/91174 useless extension candidates. Maximal degree in co-relation 564765. Up to 62896 conditions per place. [2023-08-27 14:41:52,578 INFO L140 encePairwiseOnDemand]: 438/441 looper letters, 676 selfloop transitions, 5 changer transitions 0/724 dead transitions. [2023-08-27 14:41:52,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 724 transitions, 14050 flow [2023-08-27 14:41:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 14:41:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 14:41:52,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 632 transitions. [2023-08-27 14:41:52,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47770219198790626 [2023-08-27 14:41:52,580 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 632 transitions. [2023-08-27 14:41:52,580 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 632 transitions. [2023-08-27 14:41:52,580 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:41:52,580 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 632 transitions. [2023-08-27 14:41:52,581 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.66666666666666) internal successors, (632), 3 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 14:41:52,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:52,582 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 441.0) internal successors, (1764), 4 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:41:52,582 INFO L175 Difference]: Start difference. First operand has 146 places, 434 transitions, 7156 flow. Second operand 3 states and 632 transitions. [2023-08-27 14:41:52,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 724 transitions, 14050 flow [2023-08-27 14:42:30,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 724 transitions, 13839 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-27 14:42:30,029 INFO L231 Difference]: Finished difference. Result has 145 places, 434 transitions, 7047 flow [2023-08-27 14:42:30,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=7026, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=7047, PETRI_PLACES=145, PETRI_TRANSITIONS=434} [2023-08-27 14:42:30,029 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 93 predicate places. [2023-08-27 14:42:30,030 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 434 transitions, 7047 flow [2023-08-27 14:42:30,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.0) internal successors, (609), 3 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:30,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:42:30,030 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:42:30,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-27 14:42:30,030 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:42:30,030 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:42:30,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1066668489, now seen corresponding path program 1 times [2023-08-27 14:42:30,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:42:30,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969557463] [2023-08-27 14:42:30,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:42:30,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:42:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:42:32,218 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 14:42:32,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:42:32,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969557463] [2023-08-27 14:42:32,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969557463] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:42:32,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350640037] [2023-08-27 14:42:32,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:42:32,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:42:32,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:42:32,220 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 14:42:32,226 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 14:42:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:42:32,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-27 14:42:32,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:42:32,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:42:32,788 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 14:42:32,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:42:32,990 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 14:42:33,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:42:33,305 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:42:33,306 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:42:33,310 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:42:33,310 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 34 [2023-08-27 14:42:33,418 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 14:42:33,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:42:35,148 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:42:35,148 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 63 [2023-08-27 14:42:35,154 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 27 [2023-08-27 14:42:35,158 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2023-08-27 14:42:35,207 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:42:35,208 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 179 [2023-08-27 14:42:35,226 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:42:35,227 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 121 [2023-08-27 14:42:35,248 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:42:35,248 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2023-08-27 14:42:35,523 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:42:35,524 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 201 treesize of output 179 [2023-08-27 14:42:35,551 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:42:35,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 121 [2023-08-27 14:42:35,577 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:42:35,577 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 59 [2023-08-27 14:42:35,735 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:42:35,736 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:42:35,740 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:42:35,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 3 [2023-08-27 14:42:36,001 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:42:36,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350640037] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:42:36,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:42:36,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 11] total 37 [2023-08-27 14:42:36,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23676330] [2023-08-27 14:42:36,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:42:36,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-27 14:42:36,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:42:36,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-27 14:42:36,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1347, Unknown=8, NotChecked=0, Total=1482 [2023-08-27 14:42:36,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 441 [2023-08-27 14:42:36,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 434 transitions, 7047 flow. Second operand has 39 states, 39 states have (on average 103.97435897435898) internal successors, (4055), 39 states have internal predecessors, (4055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:42:36,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:42:36,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 441 [2023-08-27 14:42:36,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 14:42:58,854 WARN L234 SmtUtils]: Spent 13.06s on a formula simplification. DAG size of input: 114 DAG size of output: 105 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 14:43:06,419 WARN L234 SmtUtils]: Spent 6.52s on a formula simplification. DAG size of input: 91 DAG size of output: 82 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 14:43:14,080 WARN L234 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 94 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 14:43:23,004 WARN L234 SmtUtils]: Spent 8.82s on a formula simplification. DAG size of input: 117 DAG size of output: 111 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 14:43:43,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:43:49,593 WARN L234 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 89 DAG size of output: 83 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 14:43:56,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:44:03,761 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:44:07,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:44:10,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 14:44:11,425 INFO L124 PetriNetUnfolderBase]: 143321/198656 cut-off events. [2023-08-27 14:44:11,425 INFO L125 PetriNetUnfolderBase]: For 1874555/1874555 co-relation queries the response was YES. [2023-08-27 14:44:12,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1258132 conditions, 198656 events. 143321/198656 cut-off events. For 1874555/1874555 co-relation queries the response was YES. Maximal size of possible extension queue 2536. Compared 1303400 event pairs, 5270 based on Foata normal form. 442/194890 useless extension candidates. Maximal degree in co-relation 1258080. Up to 121012 conditions per place. [2023-08-27 14:44:13,891 INFO L140 encePairwiseOnDemand]: 420/441 looper letters, 1508 selfloop transitions, 961 changer transitions 2/2471 dead transitions. [2023-08-27 14:44:13,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 2471 transitions, 41309 flow [2023-08-27 14:44:13,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-27 14:44:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-27 14:44:13,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 6722 transitions. [2023-08-27 14:44:13,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25404383975812544 [2023-08-27 14:44:13,901 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 6722 transitions. [2023-08-27 14:44:13,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 6722 transitions. [2023-08-27 14:44:13,903 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 14:44:13,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 6722 transitions. [2023-08-27 14:44:13,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 112.03333333333333) internal successors, (6722), 60 states have internal predecessors, (6722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:13,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 441.0) internal successors, (26901), 61 states have internal predecessors, (26901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:13,932 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 441.0) internal successors, (26901), 61 states have internal predecessors, (26901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:44:13,933 INFO L175 Difference]: Start difference. First operand has 145 places, 434 transitions, 7047 flow. Second operand 60 states and 6722 transitions. [2023-08-27 14:44:13,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 2471 transitions, 41309 flow [2023-08-27 14:50:08,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 2471 transitions, 41298 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 14:50:08,429 INFO L231 Difference]: Finished difference. Result has 237 places, 1365 transitions, 24734 flow [2023-08-27 14:50:08,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=441, PETRI_DIFFERENCE_MINUEND_FLOW=6895, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=24734, PETRI_PLACES=237, PETRI_TRANSITIONS=1365} [2023-08-27 14:50:08,430 INFO L281 CegarLoopForPetriNet]: 52 programPoint places, 185 predicate places. [2023-08-27 14:50:08,430 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 1365 transitions, 24734 flow [2023-08-27 14:50:08,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 103.97435897435898) internal successors, (4055), 39 states have internal predecessors, (4055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:08,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 14:50:08,431 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 14:50:08,435 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 14:50:08,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 14:50:08,632 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 35 more)] === [2023-08-27 14:50:08,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 14:50:08,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1162463891, now seen corresponding path program 2 times [2023-08-27 14:50:08,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 14:50:08,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703126575] [2023-08-27 14:50:08,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 14:50:08,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 14:50:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 14:50:10,286 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 14:50:10,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 14:50:10,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703126575] [2023-08-27 14:50:10,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703126575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 14:50:10,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981428968] [2023-08-27 14:50:10,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 14:50:10,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 14:50:10,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 14:50:10,288 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 14:50:10,291 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 14:50:10,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 14:50:10,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 14:50:10,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-27 14:50:10,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 14:50:11,306 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:50:11,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 14:50:11,309 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 14:50:11,314 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:50:11,315 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 72 treesize of output 34 [2023-08-27 14:50:11,403 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 14:50:11,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 14:50:12,293 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 14:50:12,293 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 75 [2023-08-27 14:50:12,390 INFO L322 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2023-08-27 14:50:12,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 1 [2023-08-27 14:50:13,038 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 14:50:13,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981428968] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 14:50:13,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 14:50:13,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 9] total 32 [2023-08-27 14:50:13,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999177840] [2023-08-27 14:50:13,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 14:50:13,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 14:50:13,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 14:50:13,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 14:50:13,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2023-08-27 14:50:13,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 441 [2023-08-27 14:50:13,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 1365 transitions, 24734 flow. Second operand has 33 states, 33 states have (on average 114.33333333333333) internal successors, (3773), 33 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 14:50:13,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 14:50:13,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 441 [2023-08-27 14:50:13,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand