/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 07:20:19,949 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 07:20:20,019 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 07:20:20,023 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 07:20:20,024 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 07:20:20,068 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 07:20:20,069 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 07:20:20,071 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 07:20:20,072 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 07:20:20,072 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 07:20:20,072 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 07:20:20,073 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 07:20:20,073 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 07:20:20,073 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 07:20:20,074 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 07:20:20,074 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 07:20:20,074 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 07:20:20,075 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 07:20:20,075 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 07:20:20,075 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 07:20:20,076 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 07:20:20,081 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 07:20:20,081 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 07:20:20,081 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 07:20:20,081 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 07:20:20,082 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 07:20:20,082 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 07:20:20,082 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:20:20,083 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 07:20:20,083 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 07:20:20,083 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 07:20:20,083 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 07:20:20,084 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 07:20:20,084 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 07:20:20,084 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 07:20:20,085 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 07:20:20,393 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 07:20:20,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 07:20:20,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 07:20:20,416 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 07:20:20,418 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 07:20:20,419 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-27 07:20:21,604 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 07:20:21,777 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 07:20:21,777 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2023-08-27 07:20:21,786 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/076990511/78f8d0a45f1341e59b0e1921cd54b782/FLAGf0e02dd71 [2023-08-27 07:20:21,803 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/076990511/78f8d0a45f1341e59b0e1921cd54b782 [2023-08-27 07:20:21,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 07:20:21,811 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 07:20:21,813 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 07:20:21,813 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 07:20:21,815 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 07:20:21,816 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:20:21" (1/1) ... [2023-08-27 07:20:21,817 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56093c45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:20:21, skipping insertion in model container [2023-08-27 07:20:21,817 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:20:21" (1/1) ... [2023-08-27 07:20:21,838 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 07:20:21,989 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:20:21,999 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 07:20:22,027 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:20:22,034 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:20:22,034 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:20:22,040 INFO L206 MainTranslator]: Completed translation [2023-08-27 07:20:22,040 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:20:22 WrapperNode [2023-08-27 07:20:22,040 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 07:20:22,041 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 07:20:22,041 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 07:20:22,042 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 07:20:22,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:20:22" (1/1) ... [2023-08-27 07:20:22,052 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:20:22" (1/1) ... [2023-08-27 07:20:22,075 INFO L138 Inliner]: procedures = 24, calls = 46, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 168 [2023-08-27 07:20:22,076 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 07:20:22,076 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 07:20:22,076 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 07:20:22,076 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 07:20:22,084 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:20:22" (1/1) ... [2023-08-27 07:20:22,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:20:22" (1/1) ... [2023-08-27 07:20:22,090 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:20:22" (1/1) ... [2023-08-27 07:20:22,091 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:20:22" (1/1) ... [2023-08-27 07:20:22,096 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:20:22" (1/1) ... [2023-08-27 07:20:22,099 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:20:22" (1/1) ... [2023-08-27 07:20:22,101 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:20:22" (1/1) ... [2023-08-27 07:20:22,102 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:20:22" (1/1) ... [2023-08-27 07:20:22,117 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 07:20:22,118 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 07:20:22,118 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 07:20:22,118 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 07:20:22,119 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:20:22" (1/1) ... [2023-08-27 07:20:22,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:20:22,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:20:22,146 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-27 07:20:22,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-27 07:20:22,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 07:20:22,186 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 07:20:22,187 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 07:20:22,187 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 07:20:22,188 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 07:20:22,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 07:20:22,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 07:20:22,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 07:20:22,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 07:20:22,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 07:20:22,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 07:20:22,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 07:20:22,189 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 07:20:22,189 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 07:20:22,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 07:20:22,190 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 07:20:22,289 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 07:20:22,290 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 07:20:22,511 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 07:20:22,583 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 07:20:22,583 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 07:20:22,585 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:20:22 BoogieIcfgContainer [2023-08-27 07:20:22,585 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 07:20:22,587 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 07:20:22,588 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 07:20:22,590 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 07:20:22,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 07:20:21" (1/3) ... [2023-08-27 07:20:22,591 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62bf3cad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:20:22, skipping insertion in model container [2023-08-27 07:20:22,591 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:20:22" (2/3) ... [2023-08-27 07:20:22,592 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62bf3cad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:20:22, skipping insertion in model container [2023-08-27 07:20:22,592 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:20:22" (3/3) ... [2023-08-27 07:20:22,593 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2023-08-27 07:20:22,608 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 07:20:22,608 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-27 07:20:22,608 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 07:20:22,673 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 07:20:22,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 153 transitions, 322 flow [2023-08-27 07:20:22,785 INFO L124 PetriNetUnfolderBase]: 11/151 cut-off events. [2023-08-27 07:20:22,787 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 07:20:22,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 151 events. 11/151 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 184 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 106. Up to 2 conditions per place. [2023-08-27 07:20:22,795 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 153 transitions, 322 flow [2023-08-27 07:20:22,804 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 138 places, 142 transitions, 296 flow [2023-08-27 07:20:22,808 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 07:20:22,815 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 138 places, 142 transitions, 296 flow [2023-08-27 07:20:22,822 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 138 places, 142 transitions, 296 flow [2023-08-27 07:20:22,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 138 places, 142 transitions, 296 flow [2023-08-27 07:20:22,852 INFO L124 PetriNetUnfolderBase]: 11/142 cut-off events. [2023-08-27 07:20:22,852 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 07:20:22,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151 conditions, 142 events. 11/142 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 183 event pairs, 0 based on Foata normal form. 0/121 useless extension candidates. Maximal degree in co-relation 106. Up to 2 conditions per place. [2023-08-27 07:20:22,855 INFO L119 LiptonReduction]: Number of co-enabled transitions 1992 [2023-08-27 07:20:28,417 INFO L134 LiptonReduction]: Checked pairs total: 2700 [2023-08-27 07:20:28,417 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-27 07:20:28,429 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 07:20:28,434 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;@f354aa3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 07:20:28,435 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-27 07:20:28,436 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 07:20:28,436 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 07:20:28,436 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 07:20:28,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:20:28,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 07:20:28,437 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:20:28,441 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:20:28,441 INFO L85 PathProgramCache]: Analyzing trace with hash 21700, now seen corresponding path program 1 times [2023-08-27 07:20:28,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:20:28,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054106777] [2023-08-27 07:20:28,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:28,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:20:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:28,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:20:28,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054106777] [2023-08-27 07:20:28,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054106777] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:20:28,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:20:28,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 07:20:28,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741236886] [2023-08-27 07:20:28,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:20:28,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:20:28,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:20:28,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:20:28,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:20:28,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 321 [2023-08-27 07:20:28,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:28,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:20:28,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 321 [2023-08-27 07:20:28,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:20:28,759 INFO L124 PetriNetUnfolderBase]: 193/294 cut-off events. [2023-08-27 07:20:28,759 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-27 07:20:28,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 607 conditions, 294 events. 193/294 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1047 event pairs, 89 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 523. Up to 287 conditions per place. [2023-08-27 07:20:28,763 INFO L140 encePairwiseOnDemand]: 313/321 looper letters, 22 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-08-27 07:20:28,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 27 transitions, 116 flow [2023-08-27 07:20:28,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:20:28,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:20:28,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-08-27 07:20:28,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4174454828660436 [2023-08-27 07:20:28,777 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-08-27 07:20:28,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-08-27 07:20:28,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:20:28,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-08-27 07:20:28,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:28,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:28,788 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:28,789 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 68 flow. Second operand 3 states and 402 transitions. [2023-08-27 07:20:28,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 27 transitions, 116 flow [2023-08-27 07:20:28,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 07:20:28,794 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 75 flow [2023-08-27 07:20:28,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2023-08-27 07:20:28,799 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, -4 predicate places. [2023-08-27 07:20:28,799 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 75 flow [2023-08-27 07:20:28,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.66666666666667) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:28,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:20:28,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 07:20:28,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 07:20:28,800 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:20:28,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:20:28,801 INFO L85 PathProgramCache]: Analyzing trace with hash 673981, now seen corresponding path program 1 times [2023-08-27 07:20:28,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:20:28,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252147028] [2023-08-27 07:20:28,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:28,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:20:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:28,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:28,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:20:28,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252147028] [2023-08-27 07:20:28,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252147028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:20:28,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453966005] [2023-08-27 07:20:28,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:28,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:20:28,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:20:28,913 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:20:28,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 07:20:29,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:29,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:20:29,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:20:29,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:29,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:20:29,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:29,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453966005] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:20:29,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:20:29,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 07:20:29,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166878378] [2023-08-27 07:20:29,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:20:29,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:20:29,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:20:29,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:20:29,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 07:20:29,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 321 [2023-08-27 07:20:29,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 75 flow. Second operand has 7 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:29,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:20:29,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 321 [2023-08-27 07:20:29,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:20:29,178 INFO L124 PetriNetUnfolderBase]: 199/303 cut-off events. [2023-08-27 07:20:29,179 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 07:20:29,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629 conditions, 303 events. 199/303 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1077 event pairs, 89 based on Foata normal form. 0/126 useless extension candidates. Maximal degree in co-relation 575. Up to 289 conditions per place. [2023-08-27 07:20:29,184 INFO L140 encePairwiseOnDemand]: 316/321 looper letters, 21 selfloop transitions, 13 changer transitions 0/36 dead transitions. [2023-08-27 07:20:29,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 36 transitions, 179 flow [2023-08-27 07:20:29,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 07:20:29,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 07:20:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 905 transitions. [2023-08-27 07:20:29,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40275923453493545 [2023-08-27 07:20:29,191 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 905 transitions. [2023-08-27 07:20:29,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 905 transitions. [2023-08-27 07:20:29,192 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:20:29,194 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 905 transitions. [2023-08-27 07:20:29,197 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 129.28571428571428) internal successors, (905), 7 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:29,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:29,204 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:29,208 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 75 flow. Second operand 7 states and 905 transitions. [2023-08-27 07:20:29,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 36 transitions, 179 flow [2023-08-27 07:20:29,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 36 transitions, 174 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 07:20:29,210 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 154 flow [2023-08-27 07:20:29,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=154, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2023-08-27 07:20:29,211 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-08-27 07:20:29,211 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 154 flow [2023-08-27 07:20:29,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.14285714285714) internal successors, (876), 7 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:29,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:20:29,212 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-27 07:20:29,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 07:20:29,413 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 07:20:29,413 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:20:29,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:20:29,414 INFO L85 PathProgramCache]: Analyzing trace with hash 20894372, now seen corresponding path program 1 times [2023-08-27 07:20:29,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:20:29,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386174891] [2023-08-27 07:20:29,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:29,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:20:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:29,511 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:20:29,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:20:29,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386174891] [2023-08-27 07:20:29,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386174891] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:20:29,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:20:29,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:20:29,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387671279] [2023-08-27 07:20:29,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:20:29,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:20:29,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:20:29,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:20:29,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:20:29,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 321 [2023-08-27 07:20:29,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:29,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:20:29,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 321 [2023-08-27 07:20:29,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:20:29,595 INFO L124 PetriNetUnfolderBase]: 196/299 cut-off events. [2023-08-27 07:20:29,596 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 07:20:29,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 637 conditions, 299 events. 196/299 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1074 event pairs, 89 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 601. Up to 286 conditions per place. [2023-08-27 07:20:29,598 INFO L140 encePairwiseOnDemand]: 318/321 looper letters, 24 selfloop transitions, 6 changer transitions 0/32 dead transitions. [2023-08-27 07:20:29,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 32 transitions, 187 flow [2023-08-27 07:20:29,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:20:29,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:20:29,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-08-27 07:20:29,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4101765316718588 [2023-08-27 07:20:29,599 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-08-27 07:20:29,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-08-27 07:20:29,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:20:29,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-08-27 07:20:29,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:29,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:29,603 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:29,603 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 154 flow. Second operand 3 states and 395 transitions. [2023-08-27 07:20:29,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 32 transitions, 187 flow [2023-08-27 07:20:29,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 166 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 07:20:29,605 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 118 flow [2023-08-27 07:20:29,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-27 07:20:29,606 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 3 predicate places. [2023-08-27 07:20:29,606 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 118 flow [2023-08-27 07:20:29,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:29,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:20:29,607 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 07:20:29,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 07:20:29,607 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:20:29,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:20:29,607 INFO L85 PathProgramCache]: Analyzing trace with hash 647326152, now seen corresponding path program 1 times [2023-08-27 07:20:29,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:20:29,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657707031] [2023-08-27 07:20:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:29,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:20:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:29,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:20:29,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657707031] [2023-08-27 07:20:29,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657707031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:20:29,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:20:29,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:20:29,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880946225] [2023-08-27 07:20:29,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:20:29,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:20:29,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:20:29,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:20:29,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 07:20:29,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 321 [2023-08-27 07:20:29,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:29,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:20:29,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 321 [2023-08-27 07:20:29,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:20:29,847 INFO L124 PetriNetUnfolderBase]: 162/302 cut-off events. [2023-08-27 07:20:29,848 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-27 07:20:29,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 302 events. 162/302 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 1221 event pairs, 57 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 608. Up to 161 conditions per place. [2023-08-27 07:20:29,850 INFO L140 encePairwiseOnDemand]: 314/321 looper letters, 55 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-08-27 07:20:29,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 60 transitions, 297 flow [2023-08-27 07:20:29,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 07:20:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 07:20:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 659 transitions. [2023-08-27 07:20:29,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105919003115265 [2023-08-27 07:20:29,852 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 659 transitions. [2023-08-27 07:20:29,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 659 transitions. [2023-08-27 07:20:29,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:20:29,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 659 transitions. [2023-08-27 07:20:29,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.8) internal successors, (659), 5 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:29,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:29,857 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 321.0) internal successors, (1926), 6 states have internal predecessors, (1926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:29,857 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 118 flow. Second operand 5 states and 659 transitions. [2023-08-27 07:20:29,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 60 transitions, 297 flow [2023-08-27 07:20:29,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 60 transitions, 285 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:20:29,860 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 148 flow [2023-08-27 07:20:29,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-27 07:20:29,860 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 8 predicate places. [2023-08-27 07:20:29,861 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 148 flow [2023-08-27 07:20:29,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.25) internal successors, (485), 4 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:29,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:20:29,861 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 07:20:29,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 07:20:29,861 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:20:29,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:20:29,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1395304306, now seen corresponding path program 2 times [2023-08-27 07:20:29,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:20:29,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270792984] [2023-08-27 07:20:29,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:29,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:20:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:29,942 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 07:20:29,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:20:29,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270792984] [2023-08-27 07:20:29,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270792984] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:20:29,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929172090] [2023-08-27 07:20:29,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:20:29,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:20:29,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:20:29,945 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:20:29,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 07:20:30,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:20:30,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:20:30,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 07:20:30,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:20:30,055 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 07:20:30,055 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:20:30,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929172090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:20:30,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:20:30,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 07:20:30,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18694036] [2023-08-27 07:20:30,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:20:30,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:20:30,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:20:30,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:20:30,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 07:20:30,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 321 [2023-08-27 07:20:30,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:30,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:20:30,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 321 [2023-08-27 07:20:30,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:20:30,115 INFO L124 PetriNetUnfolderBase]: 175/306 cut-off events. [2023-08-27 07:20:30,115 INFO L125 PetriNetUnfolderBase]: For 126/140 co-relation queries the response was YES. [2023-08-27 07:20:30,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 825 conditions, 306 events. 175/306 cut-off events. For 126/140 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1302 event pairs, 105 based on Foata normal form. 12/209 useless extension candidates. Maximal degree in co-relation 796. Up to 302 conditions per place. [2023-08-27 07:20:30,118 INFO L140 encePairwiseOnDemand]: 319/321 looper letters, 30 selfloop transitions, 1 changer transitions 0/34 dead transitions. [2023-08-27 07:20:30,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 34 transitions, 200 flow [2023-08-27 07:20:30,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:20:30,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:20:30,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 397 transitions. [2023-08-27 07:20:30,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4122533748701973 [2023-08-27 07:20:30,119 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 397 transitions. [2023-08-27 07:20:30,120 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 397 transitions. [2023-08-27 07:20:30,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:20:30,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 397 transitions. [2023-08-27 07:20:30,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.33333333333334) internal successors, (397), 3 states have internal predecessors, (397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:30,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:30,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:30,123 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 148 flow. Second operand 3 states and 397 transitions. [2023-08-27 07:20:30,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 34 transitions, 200 flow [2023-08-27 07:20:30,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 182 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-27 07:20:30,125 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 122 flow [2023-08-27 07:20:30,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2023-08-27 07:20:30,126 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-08-27 07:20:30,126 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 122 flow [2023-08-27 07:20:30,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:30,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:20:30,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:20:30,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 07:20:30,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:20:30,337 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:20:30,338 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:20:30,338 INFO L85 PathProgramCache]: Analyzing trace with hash -684221953, now seen corresponding path program 1 times [2023-08-27 07:20:30,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:20:30,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017726179] [2023-08-27 07:20:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:30,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:20:30,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:30,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:30,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:20:30,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017726179] [2023-08-27 07:20:30,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017726179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:20:30,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:20:30,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:20:30,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537936856] [2023-08-27 07:20:30,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:20:30,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:20:30,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:20:30,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:20:30,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 07:20:30,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 321 [2023-08-27 07:20:30,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 122 flow. Second operand has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:30,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:20:30,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 321 [2023-08-27 07:20:30,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:20:30,499 INFO L124 PetriNetUnfolderBase]: 183/336 cut-off events. [2023-08-27 07:20:30,499 INFO L125 PetriNetUnfolderBase]: For 143/164 co-relation queries the response was YES. [2023-08-27 07:20:30,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 872 conditions, 336 events. 183/336 cut-off events. For 143/164 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 1492 event pairs, 114 based on Foata normal form. 26/253 useless extension candidates. Maximal degree in co-relation 860. Up to 301 conditions per place. [2023-08-27 07:20:30,501 INFO L140 encePairwiseOnDemand]: 315/321 looper letters, 38 selfloop transitions, 3 changer transitions 0/44 dead transitions. [2023-08-27 07:20:30,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 44 transitions, 228 flow [2023-08-27 07:20:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:20:30,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:20:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 500 transitions. [2023-08-27 07:20:30,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3894080996884735 [2023-08-27 07:20:30,503 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 500 transitions. [2023-08-27 07:20:30,504 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 500 transitions. [2023-08-27 07:20:30,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:20:30,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 500 transitions. [2023-08-27 07:20:30,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:30,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:30,507 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 321.0) internal successors, (1605), 5 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:30,507 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 122 flow. Second operand 4 states and 500 transitions. [2023-08-27 07:20:30,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 44 transitions, 228 flow [2023-08-27 07:20:30,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 44 transitions, 227 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:20:30,510 INFO L231 Difference]: Finished difference. Result has 39 places, 34 transitions, 136 flow [2023-08-27 07:20:30,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=39, PETRI_TRANSITIONS=34} [2023-08-27 07:20:30,512 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 7 predicate places. [2023-08-27 07:20:30,512 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 34 transitions, 136 flow [2023-08-27 07:20:30,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 117.5) internal successors, (470), 4 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:30,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:20:30,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:20:30,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 07:20:30,513 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:20:30,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:20:30,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1237073040, now seen corresponding path program 1 times [2023-08-27 07:20:30,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:20:30,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985353705] [2023-08-27 07:20:30,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:30,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:20:30,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:30,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:30,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:20:30,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985353705] [2023-08-27 07:20:30,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985353705] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:20:30,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715723669] [2023-08-27 07:20:30,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:30,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:20:30,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:20:30,630 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:20:30,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 07:20:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:30,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:20:30,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:20:30,709 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 07:20:30,709 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:20:30,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715723669] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:20:30,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:20:30,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 07:20:30,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431521955] [2023-08-27 07:20:30,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:20:30,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:20:30,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:20:30,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:20:30,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 07:20:30,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 321 [2023-08-27 07:20:30,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 34 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:30,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:20:30,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 321 [2023-08-27 07:20:30,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:20:30,753 INFO L124 PetriNetUnfolderBase]: 90/183 cut-off events. [2023-08-27 07:20:30,753 INFO L125 PetriNetUnfolderBase]: For 136/151 co-relation queries the response was YES. [2023-08-27 07:20:30,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496 conditions, 183 events. 90/183 cut-off events. For 136/151 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 673 event pairs, 50 based on Foata normal form. 39/202 useless extension candidates. Maximal degree in co-relation 482. Up to 176 conditions per place. [2023-08-27 07:20:30,754 INFO L140 encePairwiseOnDemand]: 317/321 looper letters, 27 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-27 07:20:30,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 178 flow [2023-08-27 07:20:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:20:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:20:30,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2023-08-27 07:20:30,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4205607476635514 [2023-08-27 07:20:30,756 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2023-08-27 07:20:30,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2023-08-27 07:20:30,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:20:30,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2023-08-27 07:20:30,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:30,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:30,759 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:30,759 INFO L175 Difference]: Start difference. First operand has 39 places, 34 transitions, 136 flow. Second operand 3 states and 405 transitions. [2023-08-27 07:20:30,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 178 flow [2023-08-27 07:20:30,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 173 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:20:30,760 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 119 flow [2023-08-27 07:20:30,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=119, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-27 07:20:30,761 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 4 predicate places. [2023-08-27 07:20:30,761 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 119 flow [2023-08-27 07:20:30,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:30,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:20:30,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:20:30,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 07:20:30,966 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 07:20:30,967 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:20:30,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:20:30,967 INFO L85 PathProgramCache]: Analyzing trace with hash 878775898, now seen corresponding path program 1 times [2023-08-27 07:20:30,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:20:30,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731808386] [2023-08-27 07:20:30,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:30,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:20:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:31,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:31,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:20:31,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731808386] [2023-08-27 07:20:31,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731808386] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:20:31,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139717623] [2023-08-27 07:20:31,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:31,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:20:31,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:20:31,408 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:20:31,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 07:20:31,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:31,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 07:20:31,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:20:31,642 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 07:20:31,642 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:20:31,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139717623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:20:31,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:20:31,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2023-08-27 07:20:31,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766116965] [2023-08-27 07:20:31,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:20:31,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 07:20:31,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:20:31,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 07:20:31,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-08-27 07:20:31,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 321 [2023-08-27 07:20:31,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:31,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:20:31,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 321 [2023-08-27 07:20:31,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:20:31,811 INFO L124 PetriNetUnfolderBase]: 164/317 cut-off events. [2023-08-27 07:20:31,811 INFO L125 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2023-08-27 07:20:31,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 855 conditions, 317 events. 164/317 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1168 event pairs, 24 based on Foata normal form. 8/308 useless extension candidates. Maximal degree in co-relation 841. Up to 119 conditions per place. [2023-08-27 07:20:31,813 INFO L140 encePairwiseOnDemand]: 313/321 looper letters, 54 selfloop transitions, 12 changer transitions 0/66 dead transitions. [2023-08-27 07:20:31,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 66 transitions, 364 flow [2023-08-27 07:20:31,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 07:20:31,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 07:20:31,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 761 transitions. [2023-08-27 07:20:31,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3386737872719181 [2023-08-27 07:20:31,816 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 761 transitions. [2023-08-27 07:20:31,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 761 transitions. [2023-08-27 07:20:31,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:20:31,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 761 transitions. [2023-08-27 07:20:31,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 108.71428571428571) internal successors, (761), 7 states have internal predecessors, (761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:31,821 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:31,821 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:31,821 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 119 flow. Second operand 7 states and 761 transitions. [2023-08-27 07:20:31,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 66 transitions, 364 flow [2023-08-27 07:20:31,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 66 transitions, 363 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:20:31,823 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 215 flow [2023-08-27 07:20:31,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=215, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-08-27 07:20:31,824 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 12 predicate places. [2023-08-27 07:20:31,824 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 215 flow [2023-08-27 07:20:31,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:31,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:20:31,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:20:31,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 07:20:32,030 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 07:20:32,030 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:20:32,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:20:32,031 INFO L85 PathProgramCache]: Analyzing trace with hash 878775896, now seen corresponding path program 1 times [2023-08-27 07:20:32,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:20:32,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730876857] [2023-08-27 07:20:32,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:32,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:20:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:32,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:20:32,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730876857] [2023-08-27 07:20:32,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730876857] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:20:32,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237125724] [2023-08-27 07:20:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:32,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:20:32,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:20:32,550 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:20:32,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 07:20:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:32,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 07:20:32,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:20:32,703 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 07:20:32,748 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:20:32,789 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:20:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:32,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:20:33,519 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:20:33,520 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2023-08-27 07:20:33,532 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:20:33,533 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 152 treesize of output 144 [2023-08-27 07:20:33,546 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:20:33,547 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 120 [2023-08-27 07:20:33,567 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:20:33,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 81 [2023-08-27 07:20:33,917 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:33,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237125724] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:20:33,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:20:33,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-08-27 07:20:33,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688994996] [2023-08-27 07:20:33,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:20:33,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 07:20:33,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:20:33,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 07:20:33,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=349, Unknown=3, NotChecked=0, Total=462 [2023-08-27 07:20:33,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 321 [2023-08-27 07:20:33,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 215 flow. Second operand has 22 states, 22 states have (on average 78.36363636363636) internal successors, (1724), 22 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:33,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:20:33,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 321 [2023-08-27 07:20:33,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:20:50,480 WARN L234 SmtUtils]: Spent 16.40s on a formula simplification. DAG size of input: 67 DAG size of output: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:20:53,452 INFO L124 PetriNetUnfolderBase]: 570/1098 cut-off events. [2023-08-27 07:20:53,452 INFO L125 PetriNetUnfolderBase]: For 1431/1431 co-relation queries the response was YES. [2023-08-27 07:20:53,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3590 conditions, 1098 events. 570/1098 cut-off events. For 1431/1431 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5764 event pairs, 57 based on Foata normal form. 41/1138 useless extension candidates. Maximal degree in co-relation 3572. Up to 290 conditions per place. [2023-08-27 07:20:53,459 INFO L140 encePairwiseOnDemand]: 308/321 looper letters, 170 selfloop transitions, 79 changer transitions 5/254 dead transitions. [2023-08-27 07:20:53,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 254 transitions, 1651 flow [2023-08-27 07:20:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 07:20:53,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 07:20:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2852 transitions. [2023-08-27 07:20:53,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2613157412497709 [2023-08-27 07:20:53,471 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2852 transitions. [2023-08-27 07:20:53,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2852 transitions. [2023-08-27 07:20:53,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:20:53,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2852 transitions. [2023-08-27 07:20:53,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 83.88235294117646) internal successors, (2852), 34 states have internal predecessors, (2852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:53,492 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 321.0) internal successors, (11235), 35 states have internal predecessors, (11235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:53,494 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 321.0) internal successors, (11235), 35 states have internal predecessors, (11235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:53,494 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 215 flow. Second operand 34 states and 2852 transitions. [2023-08-27 07:20:53,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 254 transitions, 1651 flow [2023-08-27 07:20:53,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 254 transitions, 1615 flow, removed 18 selfloop flow, removed 0 redundant places. [2023-08-27 07:20:53,508 INFO L231 Difference]: Finished difference. Result has 87 places, 122 transitions, 1045 flow [2023-08-27 07:20:53,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1045, PETRI_PLACES=87, PETRI_TRANSITIONS=122} [2023-08-27 07:20:53,509 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 55 predicate places. [2023-08-27 07:20:53,509 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 122 transitions, 1045 flow [2023-08-27 07:20:53,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 78.36363636363636) internal successors, (1724), 22 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:53,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:20:53,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:20:53,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 07:20:53,715 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 07:20:53,715 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:20:53,716 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:20:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1604905667, now seen corresponding path program 1 times [2023-08-27 07:20:53,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:20:53,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415907530] [2023-08-27 07:20:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:53,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:20:53,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:53,894 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 07:20:53,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:20:53,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415907530] [2023-08-27 07:20:53,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415907530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:20:53,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927202350] [2023-08-27 07:20:53,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:53,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:20:53,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:20:53,896 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:20:53,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 07:20:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:53,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 07:20:53,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:20:54,133 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 142 treesize of output 110 [2023-08-27 07:20:54,190 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 07:20:54,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:20:54,272 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 12 treesize of output 4 [2023-08-27 07:20:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:54,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927202350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:20:54,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:20:54,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2023-08-27 07:20:54,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546685726] [2023-08-27 07:20:54,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:20:54,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 07:20:54,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:20:54,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 07:20:54,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-08-27 07:20:54,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 321 [2023-08-27 07:20:54,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 122 transitions, 1045 flow. Second operand has 16 states, 16 states have (on average 103.25) internal successors, (1652), 16 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:54,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:20:54,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 321 [2023-08-27 07:20:54,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:20:54,947 INFO L124 PetriNetUnfolderBase]: 442/915 cut-off events. [2023-08-27 07:20:54,947 INFO L125 PetriNetUnfolderBase]: For 2815/2815 co-relation queries the response was YES. [2023-08-27 07:20:54,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3473 conditions, 915 events. 442/915 cut-off events. For 2815/2815 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4958 event pairs, 38 based on Foata normal form. 68/982 useless extension candidates. Maximal degree in co-relation 3443. Up to 200 conditions per place. [2023-08-27 07:20:54,954 INFO L140 encePairwiseOnDemand]: 310/321 looper letters, 138 selfloop transitions, 53 changer transitions 0/191 dead transitions. [2023-08-27 07:20:54,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 191 transitions, 1565 flow [2023-08-27 07:20:54,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 07:20:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 07:20:54,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2262 transitions. [2023-08-27 07:20:54,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3355585224744103 [2023-08-27 07:20:54,961 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2262 transitions. [2023-08-27 07:20:54,961 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2262 transitions. [2023-08-27 07:20:54,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:20:54,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2262 transitions. [2023-08-27 07:20:54,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 107.71428571428571) internal successors, (2262), 21 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:54,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 321.0) internal successors, (7062), 22 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:54,976 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 321.0) internal successors, (7062), 22 states have internal predecessors, (7062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:54,976 INFO L175 Difference]: Start difference. First operand has 87 places, 122 transitions, 1045 flow. Second operand 21 states and 2262 transitions. [2023-08-27 07:20:54,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 191 transitions, 1565 flow [2023-08-27 07:20:54,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 191 transitions, 1435 flow, removed 59 selfloop flow, removed 5 redundant places. [2023-08-27 07:20:54,992 INFO L231 Difference]: Finished difference. Result has 102 places, 113 transitions, 998 flow [2023-08-27 07:20:54,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=998, PETRI_PLACES=102, PETRI_TRANSITIONS=113} [2023-08-27 07:20:54,994 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 70 predicate places. [2023-08-27 07:20:54,994 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 113 transitions, 998 flow [2023-08-27 07:20:54,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 103.25) internal successors, (1652), 16 states have internal predecessors, (1652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:54,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:20:54,995 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:20:55,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 07:20:55,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:20:55,200 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:20:55,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:20:55,200 INFO L85 PathProgramCache]: Analyzing trace with hash 415997986, now seen corresponding path program 2 times [2023-08-27 07:20:55,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:20:55,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223834505] [2023-08-27 07:20:55,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:20:55,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:20:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:20:55,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:55,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:20:55,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223834505] [2023-08-27 07:20:55,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223834505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:20:55,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227065665] [2023-08-27 07:20:55,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:20:55,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:20:55,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:20:55,801 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:20:55,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 07:20:55,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:20:55,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:20:55,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-27 07:20:55,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:20:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:56,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:20:56,640 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-27 07:20:56,640 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 231 treesize of output 191 [2023-08-27 07:20:57,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:20:57,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227065665] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:20:57,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:20:57,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-27 07:20:57,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380641875] [2023-08-27 07:20:57,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:20:57,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 07:20:57,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:20:57,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 07:20:57,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2023-08-27 07:20:57,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 321 [2023-08-27 07:20:57,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 113 transitions, 998 flow. Second operand has 25 states, 25 states have (on average 85.44) internal successors, (2136), 25 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:20:57,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:20:57,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 321 [2023-08-27 07:20:57,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:21:00,452 INFO L124 PetriNetUnfolderBase]: 738/1496 cut-off events. [2023-08-27 07:21:00,452 INFO L125 PetriNetUnfolderBase]: For 6473/6473 co-relation queries the response was YES. [2023-08-27 07:21:00,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6162 conditions, 1496 events. 738/1496 cut-off events. For 6473/6473 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9005 event pairs, 40 based on Foata normal form. 51/1546 useless extension candidates. Maximal degree in co-relation 6127. Up to 306 conditions per place. [2023-08-27 07:21:00,463 INFO L140 encePairwiseOnDemand]: 306/321 looper letters, 165 selfloop transitions, 121 changer transitions 23/309 dead transitions. [2023-08-27 07:21:00,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 309 transitions, 2861 flow [2023-08-27 07:21:00,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 07:21:00,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 07:21:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2912 transitions. [2023-08-27 07:21:00,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2834890965732087 [2023-08-27 07:21:00,471 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2912 transitions. [2023-08-27 07:21:00,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2912 transitions. [2023-08-27 07:21:00,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:21:00,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2912 transitions. [2023-08-27 07:21:00,477 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 91.0) internal successors, (2912), 32 states have internal predecessors, (2912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:00,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 321.0) internal successors, (10593), 33 states have internal predecessors, (10593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:00,504 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 321.0) internal successors, (10593), 33 states have internal predecessors, (10593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:00,504 INFO L175 Difference]: Start difference. First operand has 102 places, 113 transitions, 998 flow. Second operand 32 states and 2912 transitions. [2023-08-27 07:21:00,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 309 transitions, 2861 flow [2023-08-27 07:21:00,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 309 transitions, 2707 flow, removed 31 selfloop flow, removed 12 redundant places. [2023-08-27 07:21:00,531 INFO L231 Difference]: Finished difference. Result has 141 places, 178 transitions, 2049 flow [2023-08-27 07:21:00,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=888, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2049, PETRI_PLACES=141, PETRI_TRANSITIONS=178} [2023-08-27 07:21:00,532 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 109 predicate places. [2023-08-27 07:21:00,532 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 178 transitions, 2049 flow [2023-08-27 07:21:00,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 85.44) internal successors, (2136), 25 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:00,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:21:00,534 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:21:00,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 07:21:00,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:21:00,739 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:21:00,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:21:00,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1649622681, now seen corresponding path program 3 times [2023-08-27 07:21:00,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:21:00,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866370984] [2023-08-27 07:21:00,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:21:00,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:21:00,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:21:02,661 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 07:21:02,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:21:02,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866370984] [2023-08-27 07:21:02,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866370984] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:21:02,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180930179] [2023-08-27 07:21:02,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:21:02,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:21:02,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:21:02,663 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:21:02,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 07:21:02,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 07:21:02,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:21:02,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 07:21:02,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:21:02,916 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 07:21:02,917 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:21:02,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180930179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:21:02,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:21:02,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [10] total 14 [2023-08-27 07:21:02,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396975776] [2023-08-27 07:21:02,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:21:02,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 07:21:02,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:21:02,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 07:21:02,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2023-08-27 07:21:02,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 321 [2023-08-27 07:21:02,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 178 transitions, 2049 flow. Second operand has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:02,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:21:02,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 321 [2023-08-27 07:21:02,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:21:03,275 INFO L124 PetriNetUnfolderBase]: 678/1376 cut-off events. [2023-08-27 07:21:03,276 INFO L125 PetriNetUnfolderBase]: For 8547/8547 co-relation queries the response was YES. [2023-08-27 07:21:03,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6649 conditions, 1376 events. 678/1376 cut-off events. For 8547/8547 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8074 event pairs, 88 based on Foata normal form. 12/1387 useless extension candidates. Maximal degree in co-relation 6599. Up to 704 conditions per place. [2023-08-27 07:21:03,288 INFO L140 encePairwiseOnDemand]: 315/321 looper letters, 142 selfloop transitions, 52 changer transitions 0/194 dead transitions. [2023-08-27 07:21:03,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 194 transitions, 2484 flow [2023-08-27 07:21:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 07:21:03,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 07:21:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 755 transitions. [2023-08-27 07:21:03,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33600356030262574 [2023-08-27 07:21:03,291 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 755 transitions. [2023-08-27 07:21:03,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 755 transitions. [2023-08-27 07:21:03,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:21:03,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 755 transitions. [2023-08-27 07:21:03,294 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 107.85714285714286) internal successors, (755), 7 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:03,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:03,297 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 321.0) internal successors, (2568), 8 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:03,297 INFO L175 Difference]: Start difference. First operand has 141 places, 178 transitions, 2049 flow. Second operand 7 states and 755 transitions. [2023-08-27 07:21:03,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 194 transitions, 2484 flow [2023-08-27 07:21:03,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 194 transitions, 2279 flow, removed 77 selfloop flow, removed 8 redundant places. [2023-08-27 07:21:03,347 INFO L231 Difference]: Finished difference. Result has 137 places, 172 transitions, 1885 flow [2023-08-27 07:21:03,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1885, PETRI_PLACES=137, PETRI_TRANSITIONS=172} [2023-08-27 07:21:03,349 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 105 predicate places. [2023-08-27 07:21:03,350 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 172 transitions, 1885 flow [2023-08-27 07:21:03,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.66666666666667) internal successors, (610), 6 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:03,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:21:03,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:21:03,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 07:21:03,555 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,SelfDestructingSolverStorable11 [2023-08-27 07:21:03,555 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:21:03,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:21:03,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1480967372, now seen corresponding path program 1 times [2023-08-27 07:21:03,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:21:03,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722385426] [2023-08-27 07:21:03,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:21:03,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:21:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:21:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:21:03,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:21:03,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722385426] [2023-08-27 07:21:03,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722385426] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:21:03,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:21:03,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 07:21:03,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871452558] [2023-08-27 07:21:03,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:21:03,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:21:03,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:21:03,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:21:03,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:21:03,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 321 [2023-08-27 07:21:03,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 172 transitions, 1885 flow. Second operand has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:03,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:21:03,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 321 [2023-08-27 07:21:03,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:21:03,845 INFO L124 PetriNetUnfolderBase]: 631/1294 cut-off events. [2023-08-27 07:21:03,845 INFO L125 PetriNetUnfolderBase]: For 9036/9059 co-relation queries the response was YES. [2023-08-27 07:21:03,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6118 conditions, 1294 events. 631/1294 cut-off events. For 9036/9059 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 7941 event pairs, 250 based on Foata normal form. 33/1266 useless extension candidates. Maximal degree in co-relation 6071. Up to 746 conditions per place. [2023-08-27 07:21:03,855 INFO L140 encePairwiseOnDemand]: 318/321 looper letters, 96 selfloop transitions, 19 changer transitions 62/187 dead transitions. [2023-08-27 07:21:03,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 187 transitions, 2394 flow [2023-08-27 07:21:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:21:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:21:03,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 405 transitions. [2023-08-27 07:21:03,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4205607476635514 [2023-08-27 07:21:03,857 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 405 transitions. [2023-08-27 07:21:03,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 405 transitions. [2023-08-27 07:21:03,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:21:03,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 405 transitions. [2023-08-27 07:21:03,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:03,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:03,859 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:03,859 INFO L175 Difference]: Start difference. First operand has 137 places, 172 transitions, 1885 flow. Second operand 3 states and 405 transitions. [2023-08-27 07:21:03,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 187 transitions, 2394 flow [2023-08-27 07:21:03,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 187 transitions, 2274 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-27 07:21:03,890 INFO L231 Difference]: Finished difference. Result has 132 places, 118 transitions, 1304 flow [2023-08-27 07:21:03,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1755, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1304, PETRI_PLACES=132, PETRI_TRANSITIONS=118} [2023-08-27 07:21:03,891 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 100 predicate places. [2023-08-27 07:21:03,891 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 118 transitions, 1304 flow [2023-08-27 07:21:03,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:21:03,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:21:03,892 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:21:03,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 07:21:03,892 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:21:03,892 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:21:03,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1613630168, now seen corresponding path program 2 times [2023-08-27 07:21:03,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:21:03,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645779640] [2023-08-27 07:21:03,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:21:03,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:21:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:21:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:21:04,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:21:04,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645779640] [2023-08-27 07:21:04,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645779640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:21:04,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096343482] [2023-08-27 07:21:04,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:21:04,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:21:04,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:21:04,682 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:21:04,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 07:21:04,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:21:04,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:21:04,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 07:21:04,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:21:04,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 07:21:04,897 INFO L322 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-27 07:21:04,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 30 [2023-08-27 07:21:04,997 INFO L322 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-27 07:21:04,998 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 43 [2023-08-27 07:21:05,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:21:05,094 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 31 treesize of output 33 [2023-08-27 07:21:05,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:21:05,184 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 31 treesize of output 33 [2023-08-27 07:21:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:21:06,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:21:07,717 INFO L322 Elim1Store]: treesize reduction 104, result has 49.3 percent of original size [2023-08-27 07:21:07,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 6 case distinctions, treesize of input 409 treesize of output 311 [2023-08-27 07:21:07,731 INFO L160 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:21:07,734 INFO L165 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 248 [2023-08-27 07:21:07,803 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:21:07,804 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 698 treesize of output 756 [2023-08-27 07:21:07,846 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:21:07,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 625 treesize of output 602 [2023-08-27 07:21:07,903 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:21:07,903 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 573 treesize of output 576 [2023-08-27 07:21:08,009 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:21:08,010 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 582 treesize of output 652 [2023-08-27 07:21:08,080 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:21:08,080 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 521 treesize of output 498 [2023-08-27 07:21:08,143 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:21:08,144 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 469 treesize of output 472 [2023-08-27 07:22:49,910 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-27 07:22:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:22:50,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096343482] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:22:50,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:22:50,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-27 07:22:50,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692403125] [2023-08-27 07:22:50,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:22:50,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 07:22:50,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:22:50,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 07:22:50,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=632, Unknown=9, NotChecked=0, Total=812 [2023-08-27 07:22:50,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 321 [2023-08-27 07:22:50,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 118 transitions, 1304 flow. Second operand has 29 states, 29 states have (on average 80.44827586206897) internal successors, (2333), 29 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:22:50,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:22:50,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 321 [2023-08-27 07:22:50,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:22:57,423 INFO L124 PetriNetUnfolderBase]: 893/1640 cut-off events. [2023-08-27 07:22:57,423 INFO L125 PetriNetUnfolderBase]: For 14910/14910 co-relation queries the response was YES. [2023-08-27 07:22:57,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8549 conditions, 1640 events. 893/1640 cut-off events. For 14910/14910 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 8974 event pairs, 156 based on Foata normal form. 44/1679 useless extension candidates. Maximal degree in co-relation 8502. Up to 437 conditions per place. [2023-08-27 07:22:57,441 INFO L140 encePairwiseOnDemand]: 311/321 looper letters, 167 selfloop transitions, 125 changer transitions 14/306 dead transitions. [2023-08-27 07:22:57,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 306 transitions, 3676 flow [2023-08-27 07:22:57,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 07:22:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 07:22:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2620 transitions. [2023-08-27 07:22:57,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2632901215958195 [2023-08-27 07:22:57,449 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2620 transitions. [2023-08-27 07:22:57,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2620 transitions. [2023-08-27 07:22:57,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:22:57,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2620 transitions. [2023-08-27 07:22:57,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 84.51612903225806) internal successors, (2620), 31 states have internal predecessors, (2620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:22:57,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 321.0) internal successors, (10272), 32 states have internal predecessors, (10272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:22:57,465 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 321.0) internal successors, (10272), 32 states have internal predecessors, (10272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:22:57,465 INFO L175 Difference]: Start difference. First operand has 132 places, 118 transitions, 1304 flow. Second operand 31 states and 2620 transitions. [2023-08-27 07:22:57,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 306 transitions, 3676 flow [2023-08-27 07:22:57,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 306 transitions, 3376 flow, removed 91 selfloop flow, removed 13 redundant places. [2023-08-27 07:22:57,512 INFO L231 Difference]: Finished difference. Result has 136 places, 201 transitions, 2549 flow [2023-08-27 07:22:57,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=2549, PETRI_PLACES=136, PETRI_TRANSITIONS=201} [2023-08-27 07:22:57,513 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 104 predicate places. [2023-08-27 07:22:57,513 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 201 transitions, 2549 flow [2023-08-27 07:22:57,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 80.44827586206897) internal successors, (2333), 29 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:22:57,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:22:57,514 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:22:57,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 07:22:57,719 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,SelfDestructingSolverStorable13 [2023-08-27 07:22:57,719 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:22:57,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:22:57,720 INFO L85 PathProgramCache]: Analyzing trace with hash 162856667, now seen corresponding path program 2 times [2023-08-27 07:22:57,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:22:57,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937106572] [2023-08-27 07:22:57,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:22:57,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:22:57,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:22:58,468 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 07:22:58,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:22:58,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937106572] [2023-08-27 07:22:58,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937106572] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:22:58,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170103340] [2023-08-27 07:22:58,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:22:58,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:22:58,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:22:58,470 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:22:58,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 07:22:58,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:22:58,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:22:58,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 07:22:58,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:22:58,939 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 07:22:58,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:22:59,368 INFO L322 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-08-27 07:22:59,369 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 254 treesize of output 208 [2023-08-27 07:22:59,930 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 07:22:59,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170103340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:22:59,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:22:59,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-27 07:22:59,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919013599] [2023-08-27 07:22:59,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:22:59,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 07:22:59,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:22:59,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 07:22:59,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2023-08-27 07:22:59,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 321 [2023-08-27 07:22:59,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 201 transitions, 2549 flow. Second operand has 29 states, 29 states have (on average 83.44827586206897) internal successors, (2420), 29 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:22:59,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:22:59,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 321 [2023-08-27 07:22:59,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:23:02,872 INFO L124 PetriNetUnfolderBase]: 1109/1996 cut-off events. [2023-08-27 07:23:02,872 INFO L125 PetriNetUnfolderBase]: For 18570/18570 co-relation queries the response was YES. [2023-08-27 07:23:02,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11093 conditions, 1996 events. 1109/1996 cut-off events. For 18570/18570 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 11297 event pairs, 114 based on Foata normal form. 16/2007 useless extension candidates. Maximal degree in co-relation 11045. Up to 931 conditions per place. [2023-08-27 07:23:02,893 INFO L140 encePairwiseOnDemand]: 309/321 looper letters, 229 selfloop transitions, 108 changer transitions 1/338 dead transitions. [2023-08-27 07:23:02,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 338 transitions, 4391 flow [2023-08-27 07:23:02,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 07:23:02,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 07:23:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2874 transitions. [2023-08-27 07:23:02,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2713112432738601 [2023-08-27 07:23:02,898 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2874 transitions. [2023-08-27 07:23:02,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2874 transitions. [2023-08-27 07:23:02,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:23:02,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2874 transitions. [2023-08-27 07:23:02,903 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 87.0909090909091) internal successors, (2874), 33 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:02,912 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 321.0) internal successors, (10914), 34 states have internal predecessors, (10914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:02,913 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 321.0) internal successors, (10914), 34 states have internal predecessors, (10914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:02,913 INFO L175 Difference]: Start difference. First operand has 136 places, 201 transitions, 2549 flow. Second operand 33 states and 2874 transitions. [2023-08-27 07:23:02,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 338 transitions, 4391 flow [2023-08-27 07:23:02,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 338 transitions, 4177 flow, removed 93 selfloop flow, removed 10 redundant places. [2023-08-27 07:23:03,001 INFO L231 Difference]: Finished difference. Result has 162 places, 259 transitions, 3559 flow [2023-08-27 07:23:03,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3559, PETRI_PLACES=162, PETRI_TRANSITIONS=259} [2023-08-27 07:23:03,002 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 130 predicate places. [2023-08-27 07:23:03,002 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 259 transitions, 3559 flow [2023-08-27 07:23:03,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 83.44827586206897) internal successors, (2420), 29 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:03,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:23:03,004 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:23:03,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 07:23:03,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 07:23:03,210 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:23:03,210 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:23:03,210 INFO L85 PathProgramCache]: Analyzing trace with hash 162481875, now seen corresponding path program 1 times [2023-08-27 07:23:03,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:23:03,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246468655] [2023-08-27 07:23:03,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:23:03,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:23:03,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:23:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:23:04,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:23:04,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246468655] [2023-08-27 07:23:04,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246468655] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:23:04,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91377811] [2023-08-27 07:23:04,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:23:04,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:23:04,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:23:04,017 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:23:04,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 07:23:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:23:04,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 07:23:04,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:23:04,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 07:23:04,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:23:04,270 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 20 treesize of output 22 [2023-08-27 07:23:04,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:23:04,320 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 20 treesize of output 22 [2023-08-27 07:23:04,654 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 07:23:04,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:23:05,418 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:23:05,418 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 124 treesize of output 88 [2023-08-27 07:23:05,476 INFO L322 Elim1Store]: treesize reduction 10, result has 86.3 percent of original size [2023-08-27 07:23:05,477 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 283 treesize of output 303 [2023-08-27 07:23:05,532 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-08-27 07:23:05,533 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 236 treesize of output 210 [2023-08-27 07:23:05,580 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-08-27 07:23:05,580 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 155 treesize of output 155 [2023-08-27 07:23:08,080 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 07:23:08,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91377811] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:23:08,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:23:08,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 11] total 31 [2023-08-27 07:23:08,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987226344] [2023-08-27 07:23:08,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:23:08,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 07:23:08,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:23:08,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 07:23:08,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=865, Unknown=2, NotChecked=0, Total=1056 [2023-08-27 07:23:08,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 321 [2023-08-27 07:23:08,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 259 transitions, 3559 flow. Second operand has 33 states, 33 states have (on average 76.27272727272727) internal successors, (2517), 33 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:08,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:23:08,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 321 [2023-08-27 07:23:08,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:23:14,809 INFO L124 PetriNetUnfolderBase]: 1416/2530 cut-off events. [2023-08-27 07:23:14,810 INFO L125 PetriNetUnfolderBase]: For 27316/27316 co-relation queries the response was YES. [2023-08-27 07:23:14,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14741 conditions, 2530 events. 1416/2530 cut-off events. For 27316/27316 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 15092 event pairs, 188 based on Foata normal form. 32/2560 useless extension candidates. Maximal degree in co-relation 14690. Up to 1074 conditions per place. [2023-08-27 07:23:14,829 INFO L140 encePairwiseOnDemand]: 309/321 looper letters, 294 selfloop transitions, 132 changer transitions 3/429 dead transitions. [2023-08-27 07:23:14,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 429 transitions, 5865 flow [2023-08-27 07:23:14,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-27 07:23:14,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-27 07:23:14,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3579 transitions. [2023-08-27 07:23:14,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2477673935617861 [2023-08-27 07:23:14,835 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3579 transitions. [2023-08-27 07:23:14,835 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3579 transitions. [2023-08-27 07:23:14,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:23:14,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3579 transitions. [2023-08-27 07:23:14,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 79.53333333333333) internal successors, (3579), 45 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:14,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 321.0) internal successors, (14766), 46 states have internal predecessors, (14766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:14,852 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 321.0) internal successors, (14766), 46 states have internal predecessors, (14766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:14,852 INFO L175 Difference]: Start difference. First operand has 162 places, 259 transitions, 3559 flow. Second operand 45 states and 3579 transitions. [2023-08-27 07:23:14,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 429 transitions, 5865 flow [2023-08-27 07:23:14,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 429 transitions, 5408 flow, removed 203 selfloop flow, removed 12 redundant places. [2023-08-27 07:23:14,929 INFO L231 Difference]: Finished difference. Result has 204 places, 309 transitions, 4329 flow [2023-08-27 07:23:14,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=4329, PETRI_PLACES=204, PETRI_TRANSITIONS=309} [2023-08-27 07:23:14,930 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 172 predicate places. [2023-08-27 07:23:14,930 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 309 transitions, 4329 flow [2023-08-27 07:23:14,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 76.27272727272727) internal successors, (2517), 33 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:14,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:23:14,931 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:23:14,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 07:23:15,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-27 07:23:15,136 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:23:15,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:23:15,136 INFO L85 PathProgramCache]: Analyzing trace with hash 342121607, now seen corresponding path program 3 times [2023-08-27 07:23:15,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:23:15,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107691124] [2023-08-27 07:23:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:23:15,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:23:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:23:15,626 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 07:23:15,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:23:15,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107691124] [2023-08-27 07:23:15,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107691124] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:23:15,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693853833] [2023-08-27 07:23:15,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:23:15,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:23:15,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:23:15,629 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:23:15,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 07:23:15,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 07:23:15,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:23:15,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 07:23:15,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:23:15,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 07:23:15,865 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:23:15,910 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:23:16,182 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 07:23:16,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:23:16,963 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:23:16,963 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2023-08-27 07:23:16,991 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:23:16,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 562 treesize of output 530 [2023-08-27 07:23:17,028 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:23:17,029 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 180 treesize of output 190 [2023-08-27 07:23:17,058 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:23:17,058 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 179 treesize of output 163 [2023-08-27 07:23:18,176 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 07:23:18,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693853833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:23:18,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:23:18,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 30 [2023-08-27 07:23:18,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407449448] [2023-08-27 07:23:18,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:23:18,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 07:23:18,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:23:18,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 07:23:18,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=800, Unknown=4, NotChecked=0, Total=992 [2023-08-27 07:23:18,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 321 [2023-08-27 07:23:18,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 309 transitions, 4329 flow. Second operand has 32 states, 32 states have (on average 76.3125) internal successors, (2442), 32 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:18,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:23:18,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 321 [2023-08-27 07:23:18,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:23:23,159 INFO L124 PetriNetUnfolderBase]: 2168/3778 cut-off events. [2023-08-27 07:23:23,159 INFO L125 PetriNetUnfolderBase]: For 47543/47543 co-relation queries the response was YES. [2023-08-27 07:23:23,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23066 conditions, 3778 events. 2168/3778 cut-off events. For 47543/47543 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 23200 event pairs, 226 based on Foata normal form. 76/3852 useless extension candidates. Maximal degree in co-relation 23004. Up to 1324 conditions per place. [2023-08-27 07:23:23,191 INFO L140 encePairwiseOnDemand]: 308/321 looper letters, 365 selfloop transitions, 220 changer transitions 3/588 dead transitions. [2023-08-27 07:23:23,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 588 transitions, 8663 flow [2023-08-27 07:23:23,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-27 07:23:23,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-27 07:23:23,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 3624 transitions. [2023-08-27 07:23:23,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25088265835929385 [2023-08-27 07:23:23,197 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 3624 transitions. [2023-08-27 07:23:23,197 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 3624 transitions. [2023-08-27 07:23:23,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:23:23,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 3624 transitions. [2023-08-27 07:23:23,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 80.53333333333333) internal successors, (3624), 45 states have internal predecessors, (3624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:23,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 321.0) internal successors, (14766), 46 states have internal predecessors, (14766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:23,213 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 321.0) internal successors, (14766), 46 states have internal predecessors, (14766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:23,213 INFO L175 Difference]: Start difference. First operand has 204 places, 309 transitions, 4329 flow. Second operand 45 states and 3624 transitions. [2023-08-27 07:23:23,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 588 transitions, 8663 flow [2023-08-27 07:23:23,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 588 transitions, 8426 flow, removed 80 selfloop flow, removed 18 redundant places. [2023-08-27 07:23:23,426 INFO L231 Difference]: Finished difference. Result has 244 places, 425 transitions, 7072 flow [2023-08-27 07:23:23,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=4097, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=7072, PETRI_PLACES=244, PETRI_TRANSITIONS=425} [2023-08-27 07:23:23,427 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 212 predicate places. [2023-08-27 07:23:23,427 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 425 transitions, 7072 flow [2023-08-27 07:23:23,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 76.3125) internal successors, (2442), 32 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:23,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:23:23,428 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:23:23,434 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 07:23:23,633 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,SelfDestructingSolverStorable16 [2023-08-27 07:23:23,633 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:23:23,634 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:23:23,634 INFO L85 PathProgramCache]: Analyzing trace with hash 401491460, now seen corresponding path program 3 times [2023-08-27 07:23:23,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:23:23,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020213386] [2023-08-27 07:23:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:23:23,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:23:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:23:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:23:25,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:23:25,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020213386] [2023-08-27 07:23:25,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020213386] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:23:25,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998438695] [2023-08-27 07:23:25,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:23:25,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:23:25,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:23:25,105 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:23:25,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 07:23:25,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 07:23:25,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:23:25,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 07:23:25,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:23:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 07:23:25,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:23:25,447 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:23:25,448 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 72 treesize of output 56 [2023-08-27 07:23:25,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 07:23:25,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998438695] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:23:25,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:23:25,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 18 [2023-08-27 07:23:25,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998129763] [2023-08-27 07:23:25,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:23:25,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 07:23:25,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:23:25,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 07:23:25,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-08-27 07:23:25,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 321 [2023-08-27 07:23:25,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 425 transitions, 7072 flow. Second operand has 20 states, 20 states have (on average 78.8) internal successors, (1576), 20 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:25,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:23:25,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 321 [2023-08-27 07:23:25,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:23:27,540 INFO L124 PetriNetUnfolderBase]: 2284/3979 cut-off events. [2023-08-27 07:23:27,540 INFO L125 PetriNetUnfolderBase]: For 61062/61062 co-relation queries the response was YES. [2023-08-27 07:23:27,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26647 conditions, 3979 events. 2284/3979 cut-off events. For 61062/61062 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24781 event pairs, 142 based on Foata normal form. 28/4006 useless extension candidates. Maximal degree in co-relation 26571. Up to 1881 conditions per place. [2023-08-27 07:23:27,574 INFO L140 encePairwiseOnDemand]: 311/321 looper letters, 353 selfloop transitions, 143 changer transitions 13/509 dead transitions. [2023-08-27 07:23:27,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 509 transitions, 9199 flow [2023-08-27 07:23:27,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 07:23:27,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 07:23:27,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1468 transitions. [2023-08-27 07:23:27,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25406715126341295 [2023-08-27 07:23:27,577 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1468 transitions. [2023-08-27 07:23:27,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1468 transitions. [2023-08-27 07:23:27,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:23:27,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1468 transitions. [2023-08-27 07:23:27,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 81.55555555555556) internal successors, (1468), 18 states have internal predecessors, (1468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:27,583 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 321.0) internal successors, (6099), 19 states have internal predecessors, (6099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:27,583 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 321.0) internal successors, (6099), 19 states have internal predecessors, (6099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:27,583 INFO L175 Difference]: Start difference. First operand has 244 places, 425 transitions, 7072 flow. Second operand 18 states and 1468 transitions. [2023-08-27 07:23:27,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 509 transitions, 9199 flow [2023-08-27 07:23:27,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 509 transitions, 8556 flow, removed 268 selfloop flow, removed 21 redundant places. [2023-08-27 07:23:27,881 INFO L231 Difference]: Finished difference. Result has 244 places, 443 transitions, 7206 flow [2023-08-27 07:23:27,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=6409, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7206, PETRI_PLACES=244, PETRI_TRANSITIONS=443} [2023-08-27 07:23:27,882 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 212 predicate places. [2023-08-27 07:23:27,882 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 443 transitions, 7206 flow [2023-08-27 07:23:27,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 78.8) internal successors, (1576), 20 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:27,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:23:27,883 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:23:27,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-27 07:23:28,088 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,SelfDestructingSolverStorable17 [2023-08-27 07:23:28,088 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:23:28,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:23:28,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1337820232, now seen corresponding path program 2 times [2023-08-27 07:23:28,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:23:28,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149534138] [2023-08-27 07:23:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:23:28,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:23:28,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:23:29,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:23:29,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:23:29,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149534138] [2023-08-27 07:23:29,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149534138] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:23:29,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056631710] [2023-08-27 07:23:29,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:23:29,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:23:29,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:23:29,369 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:23:29,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 07:23:29,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:23:29,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:23:29,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-27 07:23:29,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:23:29,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:23:29,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:23:30,221 INFO L322 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-08-27 07:23:30,222 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 257 treesize of output 211 [2023-08-27 07:23:30,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 07:23:30,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056631710] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:23:30,724 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:23:30,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 25 [2023-08-27 07:23:30,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557783302] [2023-08-27 07:23:30,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:23:30,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 07:23:30,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:23:30,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 07:23:30,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2023-08-27 07:23:30,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 321 [2023-08-27 07:23:30,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 443 transitions, 7206 flow. Second operand has 27 states, 27 states have (on average 76.5925925925926) internal successors, (2068), 27 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:30,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:23:30,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 321 [2023-08-27 07:23:30,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:23:34,743 INFO L124 PetriNetUnfolderBase]: 3012/5116 cut-off events. [2023-08-27 07:23:34,743 INFO L125 PetriNetUnfolderBase]: For 90987/90987 co-relation queries the response was YES. [2023-08-27 07:23:34,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35508 conditions, 5116 events. 3012/5116 cut-off events. For 90987/90987 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 32659 event pairs, 200 based on Foata normal form. 100/5215 useless extension candidates. Maximal degree in co-relation 35427. Up to 1941 conditions per place. [2023-08-27 07:23:34,784 INFO L140 encePairwiseOnDemand]: 310/321 looper letters, 392 selfloop transitions, 306 changer transitions 2/700 dead transitions. [2023-08-27 07:23:34,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 700 transitions, 11993 flow [2023-08-27 07:23:34,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-27 07:23:34,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-27 07:23:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3445 transitions. [2023-08-27 07:23:34,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.24958342389335653 [2023-08-27 07:23:34,789 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3445 transitions. [2023-08-27 07:23:34,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3445 transitions. [2023-08-27 07:23:34,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:23:34,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3445 transitions. [2023-08-27 07:23:34,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 80.11627906976744) internal successors, (3445), 43 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:34,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 321.0) internal successors, (14124), 44 states have internal predecessors, (14124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:34,803 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 321.0) internal successors, (14124), 44 states have internal predecessors, (14124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:34,803 INFO L175 Difference]: Start difference. First operand has 244 places, 443 transitions, 7206 flow. Second operand 43 states and 3445 transitions. [2023-08-27 07:23:34,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 700 transitions, 11993 flow [2023-08-27 07:23:35,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 700 transitions, 11738 flow, removed 36 selfloop flow, removed 12 redundant places. [2023-08-27 07:23:35,153 INFO L231 Difference]: Finished difference. Result has 293 places, 573 transitions, 10775 flow [2023-08-27 07:23:35,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=6916, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=10775, PETRI_PLACES=293, PETRI_TRANSITIONS=573} [2023-08-27 07:23:35,154 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 261 predicate places. [2023-08-27 07:23:35,154 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 573 transitions, 10775 flow [2023-08-27 07:23:35,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 76.5925925925926) internal successors, (2068), 27 states have internal predecessors, (2068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:35,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:23:35,154 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:23:35,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-27 07:23:35,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:23:35,355 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:23:35,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:23:35,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1886447996, now seen corresponding path program 3 times [2023-08-27 07:23:35,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:23:35,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358435069] [2023-08-27 07:23:35,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:23:35,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:23:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:23:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 07:23:35,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:23:35,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358435069] [2023-08-27 07:23:35,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358435069] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:23:35,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655154943] [2023-08-27 07:23:35,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:23:35,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:23:35,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:23:35,486 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:23:35,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 07:23:35,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 07:23:35,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:23:35,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 07:23:35,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:23:35,727 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 142 treesize of output 110 [2023-08-27 07:23:35,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:23:35,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:23:35,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 12 treesize of output 4 [2023-08-27 07:23:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:23:36,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655154943] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:23:36,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:23:36,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 18 [2023-08-27 07:23:36,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148974383] [2023-08-27 07:23:36,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:23:36,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 07:23:36,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:23:36,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 07:23:36,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-08-27 07:23:36,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 321 [2023-08-27 07:23:36,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 573 transitions, 10775 flow. Second operand has 20 states, 20 states have (on average 107.15) internal successors, (2143), 20 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:36,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:23:36,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 321 [2023-08-27 07:23:36,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:23:37,587 INFO L124 PetriNetUnfolderBase]: 2785/4916 cut-off events. [2023-08-27 07:23:37,588 INFO L125 PetriNetUnfolderBase]: For 120615/120615 co-relation queries the response was YES. [2023-08-27 07:23:37,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36705 conditions, 4916 events. 2785/4916 cut-off events. For 120615/120615 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 33200 event pairs, 449 based on Foata normal form. 228/5129 useless extension candidates. Maximal degree in co-relation 36615. Up to 2319 conditions per place. [2023-08-27 07:23:37,628 INFO L140 encePairwiseOnDemand]: 313/321 looper letters, 433 selfloop transitions, 177 changer transitions 1/617 dead transitions. [2023-08-27 07:23:37,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 617 transitions, 12103 flow [2023-08-27 07:23:37,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 07:23:37,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 07:23:37,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2145 transitions. [2023-08-27 07:23:37,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35169699950811606 [2023-08-27 07:23:37,638 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2145 transitions. [2023-08-27 07:23:37,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2145 transitions. [2023-08-27 07:23:37,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:23:37,639 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2145 transitions. [2023-08-27 07:23:37,641 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 112.89473684210526) internal successors, (2145), 19 states have internal predecessors, (2145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:37,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 321.0) internal successors, (6420), 20 states have internal predecessors, (6420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:37,646 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 321.0) internal successors, (6420), 20 states have internal predecessors, (6420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:37,646 INFO L175 Difference]: Start difference. First operand has 293 places, 573 transitions, 10775 flow. Second operand 19 states and 2145 transitions. [2023-08-27 07:23:37,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 617 transitions, 12103 flow [2023-08-27 07:23:38,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 617 transitions, 11026 flow, removed 457 selfloop flow, removed 18 redundant places. [2023-08-27 07:23:38,292 INFO L231 Difference]: Finished difference. Result has 300 places, 520 transitions, 9693 flow [2023-08-27 07:23:38,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=7660, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=9693, PETRI_PLACES=300, PETRI_TRANSITIONS=520} [2023-08-27 07:23:38,293 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 268 predicate places. [2023-08-27 07:23:38,293 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 520 transitions, 9693 flow [2023-08-27 07:23:38,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 107.15) internal successors, (2143), 20 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:38,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:23:38,293 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:23:38,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 07:23:38,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:23:38,497 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:23:38,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:23:38,497 INFO L85 PathProgramCache]: Analyzing trace with hash -713749915, now seen corresponding path program 4 times [2023-08-27 07:23:38,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:23:38,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388980814] [2023-08-27 07:23:38,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:23:38,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:23:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:23:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:23:40,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:23:40,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388980814] [2023-08-27 07:23:40,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388980814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:23:40,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770399912] [2023-08-27 07:23:40,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:23:40,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:23:40,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:23:40,284 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:23:40,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 07:23:40,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:23:40,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:23:40,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 07:23:40,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:23:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:23:40,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:23:41,082 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 07:23:41,083 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 247 treesize of output 218 [2023-08-27 07:23:41,713 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 07:23:41,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770399912] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:23:41,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:23:41,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 27 [2023-08-27 07:23:41,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515290059] [2023-08-27 07:23:41,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:23:41,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 07:23:41,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:23:41,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 07:23:41,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2023-08-27 07:23:41,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 321 [2023-08-27 07:23:41,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 520 transitions, 9693 flow. Second operand has 29 states, 29 states have (on average 83.51724137931035) internal successors, (2422), 29 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:41,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:23:41,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 321 [2023-08-27 07:23:41,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:23:45,846 INFO L124 PetriNetUnfolderBase]: 3490/6126 cut-off events. [2023-08-27 07:23:45,846 INFO L125 PetriNetUnfolderBase]: For 159008/159008 co-relation queries the response was YES. [2023-08-27 07:23:45,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46617 conditions, 6126 events. 3490/6126 cut-off events. For 159008/159008 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42458 event pairs, 170 based on Foata normal form. 116/6241 useless extension candidates. Maximal degree in co-relation 46524. Up to 1355 conditions per place. [2023-08-27 07:23:45,898 INFO L140 encePairwiseOnDemand]: 310/321 looper letters, 436 selfloop transitions, 416 changer transitions 2/854 dead transitions. [2023-08-27 07:23:45,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 854 transitions, 16140 flow [2023-08-27 07:23:45,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-27 07:23:45,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-27 07:23:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4728 transitions. [2023-08-27 07:23:45,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2727587400484597 [2023-08-27 07:23:45,905 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4728 transitions. [2023-08-27 07:23:45,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4728 transitions. [2023-08-27 07:23:45,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:23:45,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4728 transitions. [2023-08-27 07:23:45,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 87.55555555555556) internal successors, (4728), 54 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:45,926 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 321.0) internal successors, (17655), 55 states have internal predecessors, (17655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:45,927 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 321.0) internal successors, (17655), 55 states have internal predecessors, (17655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:45,927 INFO L175 Difference]: Start difference. First operand has 300 places, 520 transitions, 9693 flow. Second operand 54 states and 4728 transitions. [2023-08-27 07:23:45,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 854 transitions, 16140 flow [2023-08-27 07:23:46,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 854 transitions, 15744 flow, removed 117 selfloop flow, removed 15 redundant places. [2023-08-27 07:23:46,668 INFO L231 Difference]: Finished difference. Result has 350 places, 637 transitions, 13185 flow [2023-08-27 07:23:46,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=8834, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=13185, PETRI_PLACES=350, PETRI_TRANSITIONS=637} [2023-08-27 07:23:46,669 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 318 predicate places. [2023-08-27 07:23:46,669 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 637 transitions, 13185 flow [2023-08-27 07:23:46,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 83.51724137931035) internal successors, (2422), 29 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:46,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:23:46,670 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:23:46,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 07:23:46,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:23:46,875 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:23:46,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:23:46,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1489248259, now seen corresponding path program 4 times [2023-08-27 07:23:46,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:23:46,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596749084] [2023-08-27 07:23:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:23:46,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:23:46,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:23:48,153 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 07:23:48,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:23:48,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596749084] [2023-08-27 07:23:48,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596749084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:23:48,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437001708] [2023-08-27 07:23:48,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:23:48,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:23:48,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:23:48,154 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:23:48,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 07:23:48,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:23:48,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:23:48,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 07:23:48,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:23:48,681 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 07:23:48,681 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:23:49,263 INFO L322 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2023-08-27 07:23:49,264 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 268 treesize of output 213 [2023-08-27 07:23:50,054 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:23:50,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437001708] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:23:50,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:23:50,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 35 [2023-08-27 07:23:50,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499252986] [2023-08-27 07:23:50,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:23:50,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-27 07:23:50,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:23:50,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-27 07:23:50,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=1079, Unknown=0, NotChecked=0, Total=1332 [2023-08-27 07:23:50,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 321 [2023-08-27 07:23:50,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 637 transitions, 13185 flow. Second operand has 37 states, 37 states have (on average 76.29729729729729) internal successors, (2823), 37 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:23:50,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:23:50,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 321 [2023-08-27 07:23:50,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:24:04,872 INFO L124 PetriNetUnfolderBase]: 7570/13262 cut-off events. [2023-08-27 07:24:04,872 INFO L125 PetriNetUnfolderBase]: For 502921/502921 co-relation queries the response was YES. [2023-08-27 07:24:04,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114908 conditions, 13262 events. 7570/13262 cut-off events. For 502921/502921 co-relation queries the response was YES. Maximal size of possible extension queue 812. Compared 102051 event pairs, 416 based on Foata normal form. 304/13565 useless extension candidates. Maximal degree in co-relation 114809. Up to 3395 conditions per place. [2023-08-27 07:24:05,010 INFO L140 encePairwiseOnDemand]: 309/321 looper letters, 786 selfloop transitions, 1037 changer transitions 112/1935 dead transitions. [2023-08-27 07:24:05,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1935 transitions, 43582 flow [2023-08-27 07:24:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-08-27 07:24:05,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2023-08-27 07:24:05,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 8570 transitions. [2023-08-27 07:24:05,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2542649458537309 [2023-08-27 07:24:05,022 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 8570 transitions. [2023-08-27 07:24:05,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 8570 transitions. [2023-08-27 07:24:05,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:24:05,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 8570 transitions. [2023-08-27 07:24:05,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 81.61904761904762) internal successors, (8570), 105 states have internal predecessors, (8570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:24:05,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 321.0) internal successors, (34026), 106 states have internal predecessors, (34026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:24:05,063 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 321.0) internal successors, (34026), 106 states have internal predecessors, (34026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:24:05,063 INFO L175 Difference]: Start difference. First operand has 350 places, 637 transitions, 13185 flow. Second operand 105 states and 8570 transitions. [2023-08-27 07:24:05,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1935 transitions, 43582 flow [2023-08-27 07:24:07,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 1935 transitions, 41783 flow, removed 812 selfloop flow, removed 16 redundant places. [2023-08-27 07:24:07,559 INFO L231 Difference]: Finished difference. Result has 479 places, 1436 transitions, 36232 flow [2023-08-27 07:24:07,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=11366, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=36232, PETRI_PLACES=479, PETRI_TRANSITIONS=1436} [2023-08-27 07:24:07,560 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 447 predicate places. [2023-08-27 07:24:07,560 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 1436 transitions, 36232 flow [2023-08-27 07:24:07,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 76.29729729729729) internal successors, (2823), 37 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:24:07,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:24:07,560 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:24:07,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-27 07:24:07,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:24:07,766 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:24:07,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:24:07,767 INFO L85 PathProgramCache]: Analyzing trace with hash -893389643, now seen corresponding path program 5 times [2023-08-27 07:24:07,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:24:07,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320542375] [2023-08-27 07:24:07,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:24:07,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:24:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:24:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:24:08,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:24:08,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320542375] [2023-08-27 07:24:08,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320542375] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:24:08,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076583535] [2023-08-27 07:24:08,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 07:24:08,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:24:08,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:24:08,571 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:24:08,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 07:24:08,691 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 07:24:08,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:24:08,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 07:24:08,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:24:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:24:09,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:24:09,361 INFO L322 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-08-27 07:24:09,362 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 236 treesize of output 199 [2023-08-27 07:24:09,871 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 07:24:09,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076583535] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:24:09,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:24:09,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 6] total 26 [2023-08-27 07:24:09,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501524040] [2023-08-27 07:24:09,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:24:09,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 07:24:09,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:24:09,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 07:24:09,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2023-08-27 07:24:09,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 321 [2023-08-27 07:24:09,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 1436 transitions, 36232 flow. Second operand has 28 states, 28 states have (on average 83.60714285714286) internal successors, (2341), 28 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:24:09,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:24:09,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 321 [2023-08-27 07:24:09,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:24:16,971 INFO L124 PetriNetUnfolderBase]: 7420/13048 cut-off events. [2023-08-27 07:24:16,971 INFO L125 PetriNetUnfolderBase]: For 722456/722456 co-relation queries the response was YES. [2023-08-27 07:24:17,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126673 conditions, 13048 events. 7420/13048 cut-off events. For 722456/722456 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 101386 event pairs, 614 based on Foata normal form. 72/13119 useless extension candidates. Maximal degree in co-relation 126534. Up to 4335 conditions per place. [2023-08-27 07:24:17,133 INFO L140 encePairwiseOnDemand]: 310/321 looper letters, 1001 selfloop transitions, 637 changer transitions 2/1640 dead transitions. [2023-08-27 07:24:17,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 1640 transitions, 43305 flow [2023-08-27 07:24:17,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 07:24:17,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 07:24:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3135 transitions. [2023-08-27 07:24:17,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2712876427829699 [2023-08-27 07:24:17,136 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3135 transitions. [2023-08-27 07:24:17,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3135 transitions. [2023-08-27 07:24:17,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:24:17,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3135 transitions. [2023-08-27 07:24:17,141 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 87.08333333333333) internal successors, (3135), 36 states have internal predecessors, (3135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:24:17,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 321.0) internal successors, (11877), 37 states have internal predecessors, (11877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:24:17,150 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 321.0) internal successors, (11877), 37 states have internal predecessors, (11877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:24:17,150 INFO L175 Difference]: Start difference. First operand has 479 places, 1436 transitions, 36232 flow. Second operand 36 states and 3135 transitions. [2023-08-27 07:24:17,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 1640 transitions, 43305 flow [2023-08-27 07:24:23,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 1640 transitions, 35168 flow, removed 4034 selfloop flow, removed 11 redundant places. [2023-08-27 07:24:23,225 INFO L231 Difference]: Finished difference. Result has 507 places, 1459 transitions, 31092 flow [2023-08-27 07:24:23,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=28643, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=609, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=813, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=31092, PETRI_PLACES=507, PETRI_TRANSITIONS=1459} [2023-08-27 07:24:23,226 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 475 predicate places. [2023-08-27 07:24:23,226 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 1459 transitions, 31092 flow [2023-08-27 07:24:23,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 83.60714285714286) internal successors, (2341), 28 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:24:23,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:24:23,227 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:24:23,232 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 07:24:23,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:24:23,428 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:24:23,428 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:24:23,428 INFO L85 PathProgramCache]: Analyzing trace with hash -574343176, now seen corresponding path program 5 times [2023-08-27 07:24:23,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:24:23,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999552415] [2023-08-27 07:24:23,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:24:23,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:24:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:24:25,095 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:24:25,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:24:25,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999552415] [2023-08-27 07:24:25,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999552415] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:24:25,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678276419] [2023-08-27 07:24:25,095 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 07:24:25,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:24:25,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:24:25,096 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:24:25,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-27 07:24:25,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 07:24:25,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:24:25,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 07:24:25,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:24:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:24:25,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:24:26,400 INFO L322 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-08-27 07:24:26,400 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 259 treesize of output 214 [2023-08-27 07:24:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:24:27,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678276419] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:24:27,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:24:27,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2023-08-27 07:24:27,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238245985] [2023-08-27 07:24:27,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:24:27,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-27 07:24:27,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:24:27,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-27 07:24:27,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1442, Unknown=0, NotChecked=0, Total=1722 [2023-08-27 07:24:27,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 321 [2023-08-27 07:24:27,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 1459 transitions, 31092 flow. Second operand has 42 states, 42 states have (on average 76.28571428571429) internal successors, (3204), 42 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:24:27,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:24:27,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 321 [2023-08-27 07:24:27,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:24:56,815 INFO L124 PetriNetUnfolderBase]: 16478/28746 cut-off events. [2023-08-27 07:24:56,815 INFO L125 PetriNetUnfolderBase]: For 1891698/1891698 co-relation queries the response was YES. [2023-08-27 07:24:57,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269190 conditions, 28746 events. 16478/28746 cut-off events. For 1891698/1891698 co-relation queries the response was YES. Maximal size of possible extension queue 906. Compared 223266 event pairs, 780 based on Foata normal form. 1604/30349 useless extension candidates. Maximal degree in co-relation 269049. Up to 7263 conditions per place. [2023-08-27 07:24:57,396 INFO L140 encePairwiseOnDemand]: 307/321 looper letters, 1839 selfloop transitions, 2307 changer transitions 10/4156 dead transitions. [2023-08-27 07:24:57,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 4156 transitions, 99450 flow [2023-08-27 07:24:57,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2023-08-27 07:24:57,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2023-08-27 07:24:57,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 10752 transitions. [2023-08-27 07:24:57,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.25568951986873084 [2023-08-27 07:24:57,407 INFO L72 ComplementDD]: Start complementDD. Operand 131 states and 10752 transitions. [2023-08-27 07:24:57,407 INFO L73 IsDeterministic]: Start isDeterministic. Operand 131 states and 10752 transitions. [2023-08-27 07:24:57,409 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:24:57,409 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 131 states and 10752 transitions. [2023-08-27 07:24:57,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 132 states, 131 states have (on average 82.07633587786259) internal successors, (10752), 131 states have internal predecessors, (10752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:24:57,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 132 states, 132 states have (on average 321.0) internal successors, (42372), 132 states have internal predecessors, (42372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:24:57,455 INFO L81 ComplementDD]: Finished complementDD. Result has 132 states, 132 states have (on average 321.0) internal successors, (42372), 132 states have internal predecessors, (42372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:24:57,455 INFO L175 Difference]: Start difference. First operand has 507 places, 1459 transitions, 31092 flow. Second operand 131 states and 10752 transitions. [2023-08-27 07:24:57,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 4156 transitions, 99450 flow [2023-08-27 07:25:06,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 4156 transitions, 93502 flow, removed 2695 selfloop flow, removed 27 redundant places. [2023-08-27 07:25:06,581 INFO L231 Difference]: Finished difference. Result has 671 places, 3065 transitions, 80275 flow [2023-08-27 07:25:06,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=22896, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=691, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=131, PETRI_FLOW=80275, PETRI_PLACES=671, PETRI_TRANSITIONS=3065} [2023-08-27 07:25:06,583 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 639 predicate places. [2023-08-27 07:25:06,583 INFO L495 AbstractCegarLoop]: Abstraction has has 671 places, 3065 transitions, 80275 flow [2023-08-27 07:25:06,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 76.28571428571429) internal successors, (3204), 42 states have internal predecessors, (3204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:25:06,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:25:06,584 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:25:06,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-27 07:25:06,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:25:06,789 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:25:06,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:25:06,790 INFO L85 PathProgramCache]: Analyzing trace with hash -573968384, now seen corresponding path program 6 times [2023-08-27 07:25:06,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:25:06,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749269020] [2023-08-27 07:25:06,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:25:06,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:25:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:25:08,494 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:25:08,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:25:08,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749269020] [2023-08-27 07:25:08,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749269020] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:25:08,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917442196] [2023-08-27 07:25:08,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 07:25:08,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:25:08,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:25:08,496 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:25:08,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-27 07:25:08,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 07:25:08,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:25:08,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-27 07:25:08,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:25:08,750 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 07:25:08,796 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:25:08,838 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:25:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:25:09,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:25:10,780 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:25:10,780 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 122 [2023-08-27 07:25:10,838 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-27 07:25:10,838 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 792 treesize of output 742 [2023-08-27 07:25:10,855 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:25:10,856 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:25:10,858 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:25:10,893 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:25:10,894 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 256 treesize of output 270 [2023-08-27 07:25:10,973 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-27 07:25:10,973 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 229 [2023-08-27 07:25:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:25:12,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917442196] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:25:12,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:25:12,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 43 [2023-08-27 07:25:12,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863390032] [2023-08-27 07:25:12,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:25:12,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-27 07:25:12,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:25:12,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-27 07:25:12,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=1592, Unknown=2, NotChecked=0, Total=1980 [2023-08-27 07:25:12,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 321 [2023-08-27 07:25:12,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 671 places, 3065 transitions, 80275 flow. Second operand has 45 states, 45 states have (on average 76.2) internal successors, (3429), 45 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:25:12,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:25:12,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 321 [2023-08-27 07:25:12,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:25:29,721 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:25:45,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:25:57,978 WARN L539 Checker$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 07:26:33,275 INFO L124 PetriNetUnfolderBase]: 29465/51704 cut-off events. [2023-08-27 07:26:33,275 INFO L125 PetriNetUnfolderBase]: For 4345920/4345920 co-relation queries the response was YES. [2023-08-27 07:26:34,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 559463 conditions, 51704 events. 29465/51704 cut-off events. For 4345920/4345920 co-relation queries the response was YES. Maximal size of possible extension queue 1606. Compared 446590 event pairs, 1044 based on Foata normal form. 904/52607 useless extension candidates. Maximal degree in co-relation 559269. Up to 13087 conditions per place. [2023-08-27 07:26:35,108 INFO L140 encePairwiseOnDemand]: 309/321 looper letters, 1709 selfloop transitions, 4826 changer transitions 7/6542 dead transitions. [2023-08-27 07:26:35,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 783 places, 6542 transitions, 198343 flow [2023-08-27 07:26:35,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-08-27 07:26:35,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2023-08-27 07:26:35,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 9821 transitions. [2023-08-27 07:26:35,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2507788161993769 [2023-08-27 07:26:35,116 INFO L72 ComplementDD]: Start complementDD. Operand 122 states and 9821 transitions. [2023-08-27 07:26:35,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 122 states and 9821 transitions. [2023-08-27 07:26:35,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:26:35,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 122 states and 9821 transitions. [2023-08-27 07:26:35,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 123 states, 122 states have (on average 80.5) internal successors, (9821), 122 states have internal predecessors, (9821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:26:35,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 123 states, 123 states have (on average 321.0) internal successors, (39483), 123 states have internal predecessors, (39483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:26:35,162 INFO L81 ComplementDD]: Finished complementDD. Result has 123 states, 123 states have (on average 321.0) internal successors, (39483), 123 states have internal predecessors, (39483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:26:35,162 INFO L175 Difference]: Start difference. First operand has 671 places, 3065 transitions, 80275 flow. Second operand 122 states and 9821 transitions. [2023-08-27 07:26:35,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 783 places, 6542 transitions, 198343 flow [2023-08-27 07:27:30,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 765 places, 6542 transitions, 155040 flow, removed 21550 selfloop flow, removed 18 redundant places. [2023-08-27 07:27:31,125 INFO L231 Difference]: Finished difference. Result has 807 places, 6081 transitions, 157371 flow [2023-08-27 07:27:31,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=62100, PETRI_DIFFERENCE_MINUEND_PLACES=644, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2936, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=122, PETRI_FLOW=157371, PETRI_PLACES=807, PETRI_TRANSITIONS=6081} [2023-08-27 07:27:31,129 INFO L281 CegarLoopForPetriNet]: 32 programPoint places, 775 predicate places. [2023-08-27 07:27:31,129 INFO L495 AbstractCegarLoop]: Abstraction has has 807 places, 6081 transitions, 157371 flow [2023-08-27 07:27:31,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 76.2) internal successors, (3429), 45 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:27:31,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:27:31,130 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:27:31,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-27 07:27:31,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-27 07:27:31,335 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 07:27:31,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:27:31,335 INFO L85 PathProgramCache]: Analyzing trace with hash -943453666, now seen corresponding path program 6 times [2023-08-27 07:27:31,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:27:31,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71769691] [2023-08-27 07:27:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:27:31,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:27:31,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:27:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:27:32,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:27:32,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71769691] [2023-08-27 07:27:32,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71769691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:27:32,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989452914] [2023-08-27 07:27:32,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 07:27:32,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:27:32,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:27:32,462 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:27:32,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-27 07:27:32,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 07:27:32,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:27:32,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-27 07:27:32,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:27:32,686 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 07:27:32,746 INFO L322 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-27 07:27:32,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 32 [2023-08-27 07:27:32,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:27:32,823 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 33 treesize of output 35 [2023-08-27 07:27:32,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:27:32,896 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 33 treesize of output 35 [2023-08-27 07:27:33,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:27:33,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:27:35,516 INFO L322 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2023-08-27 07:27:35,516 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 223 treesize of output 138 [2023-08-27 07:27:35,649 INFO L322 Elim1Store]: treesize reduction 34, result has 78.9 percent of original size [2023-08-27 07:27:35,650 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 389 treesize of output 457 [2023-08-27 07:27:35,740 INFO L322 Elim1Store]: treesize reduction 34, result has 68.8 percent of original size [2023-08-27 07:27:35,741 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 322 treesize of output 320 [2023-08-27 07:27:35,845 INFO L322 Elim1Store]: treesize reduction 34, result has 68.8 percent of original size [2023-08-27 07:27:35,845 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 215 treesize of output 251 [2023-08-27 07:29:38,279 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:29:38,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989452914] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:29:38,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:29:38,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-27 07:29:38,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796606107] [2023-08-27 07:29:38,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:29:38,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-27 07:29:38,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:29:38,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-27 07:29:38,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1584, Unknown=2, NotChecked=0, Total=1892 [2023-08-27 07:29:38,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 321 [2023-08-27 07:29:38,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 807 places, 6081 transitions, 157371 flow. Second operand has 44 states, 44 states have (on average 76.22727272727273) internal successors, (3354), 44 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:29:38,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:29:38,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 321 [2023-08-27 07:29:38,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:29:41,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:29:43,691 WARN L539 Checker$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 07:29:58,089 WARN L234 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 187 DAG size of output: 184 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:30:12,301 WARN L234 SmtUtils]: Spent 5.63s on a formula simplification. DAG size of input: 98 DAG size of output: 96 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:30:23,213 WARN L234 SmtUtils]: Spent 9.06s on a formula simplification. DAG size of input: 94 DAG size of output: 92 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:30:33,473 WARN L234 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 193 DAG size of output: 190 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:30:55,655 WARN L234 SmtUtils]: Spent 9.73s on a formula simplification. DAG size of input: 104 DAG size of output: 102 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:30:57,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:31:07,189 WARN L234 SmtUtils]: Spent 8.92s on a formula simplification. DAG size of input: 100 DAG size of output: 98 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:31:22,327 WARN L234 SmtUtils]: Spent 9.25s on a formula simplification. DAG size of input: 102 DAG size of output: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:31:36,176 WARN L234 SmtUtils]: Spent 13.61s on a formula simplification. DAG size of input: 98 DAG size of output: 96 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:31:49,364 WARN L234 SmtUtils]: Spent 5.14s on a formula simplification. DAG size of input: 85 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:31:58,967 WARN L234 SmtUtils]: Spent 9.41s on a formula simplification. DAG size of input: 81 DAG size of output: 80 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:32:07,415 WARN L234 SmtUtils]: Spent 6.17s on a formula simplification. DAG size of input: 187 DAG size of output: 184 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 07:32:09,774 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:33:26,499 INFO L124 PetriNetUnfolderBase]: 19993/35370 cut-off events. [2023-08-27 07:33:26,500 INFO L125 PetriNetUnfolderBase]: For 2282745/2282745 co-relation queries the response was YES. [2023-08-27 07:33:27,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 365328 conditions, 35370 events. 19993/35370 cut-off events. For 2282745/2282745 co-relation queries the response was YES. Maximal size of possible extension queue 1177. Compared 296283 event pairs, 2424 based on Foata normal form. 368/35681 useless extension candidates. Maximal degree in co-relation 365098. Up to 12558 conditions per place. [2023-08-27 07:33:27,679 INFO L140 encePairwiseOnDemand]: 310/321 looper letters, 3407 selfloop transitions, 1546 changer transitions 2/4955 dead transitions. [2023-08-27 07:33:27,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 851 places, 4955 transitions, 153066 flow [2023-08-27 07:33:27,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-08-27 07:33:27,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2023-08-27 07:33:27,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 7603 transitions. [2023-08-27 07:33:27,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2519718963345927 [2023-08-27 07:33:27,686 INFO L72 ComplementDD]: Start complementDD. Operand 94 states and 7603 transitions. [2023-08-27 07:33:27,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 94 states and 7603 transitions. [2023-08-27 07:33:27,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:33:27,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 94 states and 7603 transitions. [2023-08-27 07:33:27,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 95 states, 94 states have (on average 80.88297872340425) internal successors, (7603), 94 states have internal predecessors, (7603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:33:27,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 95 states, 95 states have (on average 321.0) internal successors, (30495), 95 states have internal predecessors, (30495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:33:27,717 INFO L81 ComplementDD]: Finished complementDD. Result has 95 states, 95 states have (on average 321.0) internal successors, (30495), 95 states have internal predecessors, (30495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:33:27,718 INFO L175 Difference]: Start difference. First operand has 807 places, 6081 transitions, 157371 flow. Second operand 94 states and 7603 transitions. [2023-08-27 07:33:27,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 851 places, 4955 transitions, 153066 flow Received shutdown request... [2023-08-27 07:33:33,643 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 21 remaining) [2023-08-27 07:33:33,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-27 07:33:33,654 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 07:33:33,654 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 07:33:33,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 07:33:33,844 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-27 07:33:33,845 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 21 remaining) [2023-08-27 07:33:33,845 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 21 remaining) [2023-08-27 07:33:33,845 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 21 remaining) [2023-08-27 07:33:33,845 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 21 remaining) [2023-08-27 07:33:33,845 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 21 remaining) [2023-08-27 07:33:33,845 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 21 remaining) [2023-08-27 07:33:33,845 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 21 remaining) [2023-08-27 07:33:33,845 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 21 remaining) [2023-08-27 07:33:33,845 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 21 remaining) [2023-08-27 07:33:33,845 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 21 remaining) [2023-08-27 07:33:33,846 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (9 of 21 remaining) [2023-08-27 07:33:33,846 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 21 remaining) [2023-08-27 07:33:33,846 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 21 remaining) [2023-08-27 07:33:33,846 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 21 remaining) [2023-08-27 07:33:33,846 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 21 remaining) [2023-08-27 07:33:33,846 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 21 remaining) [2023-08-27 07:33:33,846 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 21 remaining) [2023-08-27 07:33:33,846 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 21 remaining) [2023-08-27 07:33:33,846 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 21 remaining) [2023-08-27 07:33:33,846 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 21 remaining) [2023-08-27 07:33:33,847 INFO L445 BasicCegarLoop]: Path program histogram: [6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 07:33:33,851 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 07:33:33,851 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 07:33:33,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 07:33:33 BasicIcfg [2023-08-27 07:33:33,853 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 07:33:33,854 INFO L158 Benchmark]: Toolchain (without parser) took 792043.23ms. Allocated memory was 354.4MB in the beginning and 8.0GB in the end (delta: 7.6GB). Free memory was 312.4MB in the beginning and 6.1GB in the end (delta: -5.8GB). Peak memory consumption was 2.6GB. Max. memory is 16.0GB. [2023-08-27 07:33:33,854 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 354.4MB. Free memory is still 332.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 07:33:33,854 INFO L158 Benchmark]: CACSL2BoogieTranslator took 227.73ms. Allocated memory is still 354.4MB. Free memory was 312.4MB in the beginning and 300.9MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 07:33:33,854 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.28ms. Allocated memory is still 354.4MB. Free memory was 300.9MB in the beginning and 298.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 07:33:33,854 INFO L158 Benchmark]: Boogie Preprocessor took 40.97ms. Allocated memory is still 354.4MB. Free memory was 298.8MB in the beginning and 296.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 07:33:33,855 INFO L158 Benchmark]: RCFGBuilder took 467.81ms. Allocated memory is still 354.4MB. Free memory was 296.7MB in the beginning and 273.6MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-27 07:33:33,855 INFO L158 Benchmark]: TraceAbstraction took 791265.83ms. Allocated memory was 354.4MB in the beginning and 8.0GB in the end (delta: 7.6GB). Free memory was 272.6MB in the beginning and 6.1GB in the end (delta: -5.8GB). Peak memory consumption was 2.5GB. Max. memory is 16.0GB. [2023-08-27 07:33:33,856 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 354.4MB. Free memory is still 332.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 227.73ms. Allocated memory is still 354.4MB. Free memory was 312.4MB in the beginning and 300.9MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 34.28ms. Allocated memory is still 354.4MB. Free memory was 300.9MB in the beginning and 298.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 40.97ms. Allocated memory is still 354.4MB. Free memory was 298.8MB in the beginning and 296.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 467.81ms. Allocated memory is still 354.4MB. Free memory was 296.7MB in the beginning and 273.6MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * TraceAbstraction took 791265.83ms. Allocated memory was 354.4MB in the beginning and 8.0GB in the end (delta: 7.6GB). Free memory was 272.6MB in the beginning and 6.1GB in the end (delta: -5.8GB). Peak memory consumption was 2.5GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.6s, 138 PlacesBefore, 32 PlacesAfterwards, 142 TransitionsBefore, 28 TransitionsAfterwards, 1992 CoEnabledTransitionPairs, 7 FixpointIterations, 74 TrivialSequentialCompositions, 64 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 11 ConcurrentYvCompositions, 8 ChoiceCompositions, 168 TotalNumberOfCompositions, 2700 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2560, independent: 2538, independent conditional: 0, independent unconditional: 2538, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1180, independent: 1173, independent conditional: 0, independent unconditional: 1173, dependent: 7, dependent conditional: 0, dependent unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2560, independent: 1365, independent conditional: 0, independent unconditional: 1365, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 1180, unknown conditional: 0, unknown unconditional: 1180] , Statistics on independence cache: Total cache size (in pairs): 56, Positive cache size: 54, Positive conditional cache size: 0, Positive unconditional cache size: 54, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 54]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 115]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 115]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 99]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 191 locations, 21 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 791.1s, OverallIterations: 26, TraceHistogramMax: 4, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 504.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.7s, HoareTripleCheckerStatistics: 89 mSolverCounterUnknown, 5815 SdHoareTripleChecker+Valid, 38.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5815 mSDsluCounter, 222 SdHoareTripleChecker+Invalid, 36.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 202 mSDsCounter, 1331 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 24298 IncrementalHoareTripleChecker+Invalid, 25718 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1331 mSolverCounterUnsat, 20 mSDtfsCounter, 24298 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1375 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 1199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32877 ImplicationChecksByTransitivity, 250.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=157371occurred in iteration=25, InterpolantAutomatonStates: 814, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 273.3s InterpolantComputationTime, 586 NumberOfCodeBlocks, 576 NumberOfCodeBlocksAsserted, 64 NumberOfCheckSat, 762 ConstructedInterpolants, 66 QuantifiedInterpolants, 27810 SizeOfPredicates, 336 NumberOfNonLiveVariables, 3576 ConjunctsInSsa, 545 ConjunctsInUnsatCore, 64 InterpolantComputations, 9 PerfectInterpolantSequences, 96/443 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown