/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 -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-queue-add-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 01:53:03,670 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 01:53:03,717 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 01:53:03,728 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 01:53:03,728 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 01:53:03,748 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 01:53:03,748 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 01:53:03,749 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 01:53:03,749 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 01:53:03,750 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 01:53:03,750 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 01:53:03,750 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 01:53:03,751 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 01:53:03,751 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 01:53:03,751 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 01:53:03,752 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 01:53:03,752 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 01:53:03,752 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 01:53:03,753 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 01:53:03,753 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 01:53:03,753 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 01:53:03,754 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 01:53:03,754 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 01:53:03,755 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 01:53:03,755 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 01:53:03,755 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 01:53:03,756 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 01:53:03,756 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 01:53:03,757 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 01:53:03,757 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 01:53:03,757 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 01:53:03,758 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 01:53:03,758 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 01:53:03,758 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 01:53:03,758 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 01:53:03,759 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 01:53:04,044 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 01:53:04,071 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 01:53:04,074 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 01:53:04,075 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 01:53:04,075 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 01:53:04,077 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-08-27 01:53:05,169 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 01:53:05,392 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 01:53:05,393 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-08-27 01:53:05,402 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20d1b06d6/cee5d3f9f9fe4f94821165a5f6f76ed8/FLAG53dd468df [2023-08-27 01:53:05,417 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20d1b06d6/cee5d3f9f9fe4f94821165a5f6f76ed8 [2023-08-27 01:53:05,423 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 01:53:05,424 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 01:53:05,426 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 01:53:05,426 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 01:53:05,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 01:53:05,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:53:05" (1/1) ... [2023-08-27 01:53:05,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c260346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:53:05, skipping insertion in model container [2023-08-27 01:53:05,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:53:05" (1/1) ... [2023-08-27 01:53:05,453 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 01:53:05,639 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 01:53:05,649 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 01:53:05,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 01:53:05,694 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 01:53:05,694 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 01:53:05,700 INFO L206 MainTranslator]: Completed translation [2023-08-27 01:53:05,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:53:05 WrapperNode [2023-08-27 01:53:05,702 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 01:53:05,706 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 01:53:05,706 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 01:53:05,706 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 01:53:05,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:53:05" (1/1) ... [2023-08-27 01:53:05,732 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:53:05" (1/1) ... [2023-08-27 01:53:05,765 INFO L138 Inliner]: procedures = 24, calls = 40, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 174 [2023-08-27 01:53:05,766 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 01:53:05,767 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 01:53:05,767 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 01:53:05,767 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 01:53:05,775 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:53:05" (1/1) ... [2023-08-27 01:53:05,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:53:05" (1/1) ... [2023-08-27 01:53:05,777 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:53:05" (1/1) ... [2023-08-27 01:53:05,777 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:53:05" (1/1) ... [2023-08-27 01:53:05,788 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:53:05" (1/1) ... [2023-08-27 01:53:05,791 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:53:05" (1/1) ... [2023-08-27 01:53:05,792 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:53:05" (1/1) ... [2023-08-27 01:53:05,793 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:53:05" (1/1) ... [2023-08-27 01:53:05,795 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 01:53:05,796 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 01:53:05,796 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 01:53:05,796 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 01:53:05,796 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:53:05" (1/1) ... [2023-08-27 01:53:05,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 01:53:05,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:05,838 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 01:53:05,860 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 01:53:05,874 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 01:53:05,874 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 01:53:05,874 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 01:53:05,875 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 01:53:05,875 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 01:53:05,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 01:53:05,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 01:53:05,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 01:53:05,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 01:53:05,876 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 01:53:05,876 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 01:53:05,876 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 01:53:05,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 01:53:05,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 01:53:05,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 01:53:05,878 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 01:53:05,973 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 01:53:05,974 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 01:53:06,194 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 01:53:06,316 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 01:53:06,316 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 01:53:06,318 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:53:06 BoogieIcfgContainer [2023-08-27 01:53:06,318 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 01:53:06,321 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 01:53:06,322 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 01:53:06,324 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 01:53:06,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 01:53:05" (1/3) ... [2023-08-27 01:53:06,325 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5ca0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:53:06, skipping insertion in model container [2023-08-27 01:53:06,325 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:53:05" (2/3) ... [2023-08-27 01:53:06,326 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5ca0fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:53:06, skipping insertion in model container [2023-08-27 01:53:06,326 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:53:06" (3/3) ... [2023-08-27 01:53:06,327 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-08-27 01:53:06,342 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 01:53:06,342 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-27 01:53:06,343 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 01:53:06,422 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 01:53:06,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 149 transitions, 314 flow [2023-08-27 01:53:06,545 INFO L124 PetriNetUnfolderBase]: 11/147 cut-off events. [2023-08-27 01:53:06,545 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 01:53:06,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 147 events. 11/147 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 146 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 107. Up to 3 conditions per place. [2023-08-27 01:53:06,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 149 transitions, 314 flow [2023-08-27 01:53:06,557 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 138 transitions, 288 flow [2023-08-27 01:53:06,561 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 01:53:06,573 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 138 transitions, 288 flow [2023-08-27 01:53:06,576 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 138 transitions, 288 flow [2023-08-27 01:53:06,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 288 flow [2023-08-27 01:53:06,631 INFO L124 PetriNetUnfolderBase]: 11/138 cut-off events. [2023-08-27 01:53:06,631 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 01:53:06,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 138 events. 11/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 145 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 107. Up to 3 conditions per place. [2023-08-27 01:53:06,635 INFO L119 LiptonReduction]: Number of co-enabled transitions 1192 [2023-08-27 01:53:12,002 INFO L134 LiptonReduction]: Checked pairs total: 1644 [2023-08-27 01:53:12,003 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-08-27 01:53:12,014 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 01:53:12,019 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;@7f0f6888, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 01:53:12,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-08-27 01:53:12,022 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 01:53:12,022 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 01:53:12,022 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 01:53:12,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:12,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 01:53:12,023 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:12,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:12,027 INFO L85 PathProgramCache]: Analyzing trace with hash 22181, now seen corresponding path program 1 times [2023-08-27 01:53:12,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:12,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555918157] [2023-08-27 01:53:12,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:12,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:12,220 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 01:53:12,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:12,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555918157] [2023-08-27 01:53:12,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555918157] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:12,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:53:12,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 01:53:12,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606894587] [2023-08-27 01:53:12,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:12,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:53:12,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:12,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:53:12,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:53:12,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 297 [2023-08-27 01:53:12,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:12,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:12,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 297 [2023-08-27 01:53:12,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:12,369 INFO L124 PetriNetUnfolderBase]: 247/364 cut-off events. [2023-08-27 01:53:12,369 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-27 01:53:12,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 364 events. 247/364 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 1382 event pairs, 110 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 651. Up to 357 conditions per place. [2023-08-27 01:53:12,373 INFO L140 encePairwiseOnDemand]: 289/297 looper letters, 23 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2023-08-27 01:53:12,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 120 flow [2023-08-27 01:53:12,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:53:12,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:53:12,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-08-27 01:53:12,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43546576879910215 [2023-08-27 01:53:12,386 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-08-27 01:53:12,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-08-27 01:53:12,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:12,389 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-08-27 01:53:12,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:12,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:12,397 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:12,398 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 70 flow. Second operand 3 states and 388 transitions. [2023-08-27 01:53:12,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 120 flow [2023-08-27 01:53:12,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 112 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 01:53:12,402 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 77 flow [2023-08-27 01:53:12,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-08-27 01:53:12,406 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -4 predicate places. [2023-08-27 01:53:12,406 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 77 flow [2023-08-27 01:53:12,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:12,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:12,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 01:53:12,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 01:53:12,407 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:12,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:12,408 INFO L85 PathProgramCache]: Analyzing trace with hash 688991, now seen corresponding path program 1 times [2023-08-27 01:53:12,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:12,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036584481] [2023-08-27 01:53:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:12,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:12,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:53:12,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:12,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036584481] [2023-08-27 01:53:12,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036584481] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:12,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:53:12,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:53:12,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173556578] [2023-08-27 01:53:12,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:12,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:53:12,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:12,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:53:12,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:53:12,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 297 [2023-08-27 01:53:12,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:12,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:12,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 297 [2023-08-27 01:53:12,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:12,544 INFO L124 PetriNetUnfolderBase]: 247/363 cut-off events. [2023-08-27 01:53:12,545 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 01:53:12,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 363 events. 247/363 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 1376 event pairs, 110 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 715. Up to 353 conditions per place. [2023-08-27 01:53:12,547 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 22 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-08-27 01:53:12,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 123 flow [2023-08-27 01:53:12,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:53:12,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:53:12,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-27 01:53:12,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276094276094276 [2023-08-27 01:53:12,550 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-27 01:53:12,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-27 01:53:12,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:12,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-27 01:53:12,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:12,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:12,555 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:12,555 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 77 flow. Second operand 3 states and 381 transitions. [2023-08-27 01:53:12,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 123 flow [2023-08-27 01:53:12,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 118 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 01:53:12,556 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 74 flow [2023-08-27 01:53:12,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2023-08-27 01:53:12,557 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -4 predicate places. [2023-08-27 01:53:12,557 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 74 flow [2023-08-27 01:53:12,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:12,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:12,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 01:53:12,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 01:53:12,558 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:12,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:12,559 INFO L85 PathProgramCache]: Analyzing trace with hash 688992, now seen corresponding path program 1 times [2023-08-27 01:53:12,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:12,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109531340] [2023-08-27 01:53:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:12,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:12,688 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 01:53:12,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:12,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109531340] [2023-08-27 01:53:12,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109531340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:12,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036373495] [2023-08-27 01:53:12,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:12,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:12,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:12,701 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 01:53:12,741 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 01:53:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:12,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:53:12,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:12,853 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 01:53:12,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:53:12,886 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 01:53:12,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036373495] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:53:12,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:53:12,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 01:53:12,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898620185] [2023-08-27 01:53:12,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:53:12,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 01:53:12,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:12,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 01:53:12,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 01:53:12,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 297 [2023-08-27 01:53:12,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 120.14285714285714) internal successors, (841), 7 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:12,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:12,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 297 [2023-08-27 01:53:12,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:12,978 INFO L124 PetriNetUnfolderBase]: 250/369 cut-off events. [2023-08-27 01:53:12,978 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 01:53:12,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 369 events. 250/369 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 1415 event pairs, 110 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 715. Up to 359 conditions per place. [2023-08-27 01:53:12,980 INFO L140 encePairwiseOnDemand]: 293/297 looper letters, 22 selfloop transitions, 9 changer transitions 0/33 dead transitions. [2023-08-27 01:53:12,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 166 flow [2023-08-27 01:53:12,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:53:12,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:53:12,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 748 transitions. [2023-08-27 01:53:12,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2023-08-27 01:53:12,983 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 748 transitions. [2023-08-27 01:53:12,983 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 748 transitions. [2023-08-27 01:53:12,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:12,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 748 transitions. [2023-08-27 01:53:12,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 124.66666666666667) internal successors, (748), 6 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:12,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:12,990 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:12,990 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 74 flow. Second operand 6 states and 748 transitions. [2023-08-27 01:53:12,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 166 flow [2023-08-27 01:53:12,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 01:53:12,991 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 129 flow [2023-08-27 01:53:12,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-08-27 01:53:12,992 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-08-27 01:53:12,992 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 129 flow [2023-08-27 01:53:12,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.14285714285714) internal successors, (841), 7 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:12,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:12,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 01:53:12,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 01:53:13,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:13,199 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:13,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:13,200 INFO L85 PathProgramCache]: Analyzing trace with hash 662076111, now seen corresponding path program 1 times [2023-08-27 01:53:13,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:13,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391833799] [2023-08-27 01:53:13,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:13,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:13,324 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 01:53:13,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:13,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391833799] [2023-08-27 01:53:13,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391833799] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:13,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:53:13,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:53:13,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106837359] [2023-08-27 01:53:13,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:13,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:53:13,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:13,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:53:13,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 01:53:13,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 297 [2023-08-27 01:53:13,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:13,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:13,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 297 [2023-08-27 01:53:13,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:13,434 INFO L124 PetriNetUnfolderBase]: 238/364 cut-off events. [2023-08-27 01:53:13,435 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 01:53:13,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 364 events. 238/364 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 1331 event pairs, 109 based on Foata normal form. 4/141 useless extension candidates. Maximal degree in co-relation 730. Up to 349 conditions per place. [2023-08-27 01:53:13,437 INFO L140 encePairwiseOnDemand]: 283/297 looper letters, 28 selfloop transitions, 2 changer transitions 5/37 dead transitions. [2023-08-27 01:53:13,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 209 flow [2023-08-27 01:53:13,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:53:13,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:53:13,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 488 transitions. [2023-08-27 01:53:13,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107744107744108 [2023-08-27 01:53:13,439 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 488 transitions. [2023-08-27 01:53:13,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 488 transitions. [2023-08-27 01:53:13,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:13,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 488 transitions. [2023-08-27 01:53:13,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:13,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:13,444 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:13,444 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 129 flow. Second operand 4 states and 488 transitions. [2023-08-27 01:53:13,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 209 flow [2023-08-27 01:53:13,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 188 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 01:53:13,446 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 129 flow [2023-08-27 01:53:13,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-08-27 01:53:13,447 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-08-27 01:53:13,447 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 129 flow [2023-08-27 01:53:13,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:13,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:13,448 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 01:53:13,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 01:53:13,448 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:13,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:13,448 INFO L85 PathProgramCache]: Analyzing trace with hash -947735258, now seen corresponding path program 2 times [2023-08-27 01:53:13,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:13,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982500272] [2023-08-27 01:53:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:13,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:13,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:13,522 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 01:53:13,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:13,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982500272] [2023-08-27 01:53:13,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982500272] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:13,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310025116] [2023-08-27 01:53:13,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:53:13,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:13,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:13,524 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 01:53:13,550 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 01:53:13,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:53:13,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:53:13,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 01:53:13,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:13,612 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 01:53:13,612 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:53:13,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310025116] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:13,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:53:13,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 01:53:13,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503281897] [2023-08-27 01:53:13,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:13,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:53:13,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:13,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:53:13,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 01:53:13,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 297 [2023-08-27 01:53:13,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:13,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:13,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 297 [2023-08-27 01:53:13,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:13,699 INFO L124 PetriNetUnfolderBase]: 249/367 cut-off events. [2023-08-27 01:53:13,699 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-08-27 01:53:13,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 367 events. 249/367 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 1396 event pairs, 110 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 1030. Up to 360 conditions per place. [2023-08-27 01:53:13,702 INFO L140 encePairwiseOnDemand]: 295/297 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-27 01:53:13,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 177 flow [2023-08-27 01:53:13,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:53:13,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:53:13,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-08-27 01:53:13,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298540965207632 [2023-08-27 01:53:13,704 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-08-27 01:53:13,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-08-27 01:53:13,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:13,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-08-27 01:53:13,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:13,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:13,708 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:13,708 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 129 flow. Second operand 3 states and 383 transitions. [2023-08-27 01:53:13,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 177 flow [2023-08-27 01:53:13,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 158 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-27 01:53:13,711 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 102 flow [2023-08-27 01:53:13,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=30, 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=102, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2023-08-27 01:53:13,713 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-27 01:53:13,714 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 102 flow [2023-08-27 01:53:13,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:13,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:13,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 01:53:13,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-27 01:53:13,919 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 01:53:13,920 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:13,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:13,920 INFO L85 PathProgramCache]: Analyzing trace with hash -947823656, now seen corresponding path program 1 times [2023-08-27 01:53:13,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:13,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418385668] [2023-08-27 01:53:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:13,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:13,965 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 01:53:13,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:13,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418385668] [2023-08-27 01:53:13,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418385668] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:13,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:53:13,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:53:13,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132127013] [2023-08-27 01:53:13,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:13,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:53:13,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:13,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:53:13,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:53:13,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 297 [2023-08-27 01:53:13,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:13,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:13,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 297 [2023-08-27 01:53:13,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:14,066 INFO L124 PetriNetUnfolderBase]: 278/424 cut-off events. [2023-08-27 01:53:14,066 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-27 01:53:14,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1180 conditions, 424 events. 278/424 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 1718 event pairs, 114 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 1171. Up to 338 conditions per place. [2023-08-27 01:53:14,070 INFO L140 encePairwiseOnDemand]: 291/297 looper letters, 38 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-08-27 01:53:14,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 229 flow [2023-08-27 01:53:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:53:14,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:53:14,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 400 transitions. [2023-08-27 01:53:14,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489337822671156 [2023-08-27 01:53:14,072 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 400 transitions. [2023-08-27 01:53:14,072 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 400 transitions. [2023-08-27 01:53:14,072 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:14,072 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 400 transitions. [2023-08-27 01:53:14,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,075 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,075 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 102 flow. Second operand 3 states and 400 transitions. [2023-08-27 01:53:14,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 229 flow [2023-08-27 01:53:14,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:53:14,077 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 135 flow [2023-08-27 01:53:14,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-08-27 01:53:14,079 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 1 predicate places. [2023-08-27 01:53:14,079 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 135 flow [2023-08-27 01:53:14,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:14,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 01:53:14,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 01:53:14,080 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:14,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:14,080 INFO L85 PathProgramCache]: Analyzing trace with hash -947823659, now seen corresponding path program 1 times [2023-08-27 01:53:14,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:14,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436641642] [2023-08-27 01:53:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:14,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:14,167 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 01:53:14,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:14,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436641642] [2023-08-27 01:53:14,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436641642] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:14,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191656056] [2023-08-27 01:53:14,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:14,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:14,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:14,169 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 01:53:14,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 01:53:14,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:14,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:53:14,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:14,260 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 01:53:14,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:53:14,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191656056] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:14,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:53:14,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 01:53:14,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065472870] [2023-08-27 01:53:14,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:14,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:53:14,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:14,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:53:14,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 01:53:14,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 297 [2023-08-27 01:53:14,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:14,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 297 [2023-08-27 01:53:14,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:14,314 INFO L124 PetriNetUnfolderBase]: 130/209 cut-off events. [2023-08-27 01:53:14,315 INFO L125 PetriNetUnfolderBase]: For 78/87 co-relation queries the response was YES. [2023-08-27 01:53:14,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 209 events. 130/209 cut-off events. For 78/87 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 716 event pairs, 65 based on Foata normal form. 30/127 useless extension candidates. Maximal degree in co-relation 662. Up to 205 conditions per place. [2023-08-27 01:53:14,316 INFO L140 encePairwiseOnDemand]: 293/297 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-27 01:53:14,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 170 flow [2023-08-27 01:53:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:53:14,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:53:14,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2023-08-27 01:53:14,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44219977553310885 [2023-08-27 01:53:14,318 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2023-08-27 01:53:14,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2023-08-27 01:53:14,318 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:14,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2023-08-27 01:53:14,319 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,321 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 135 flow. Second operand 3 states and 394 transitions. [2023-08-27 01:53:14,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 170 flow [2023-08-27 01:53:14,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 165 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 01:53:14,322 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 111 flow [2023-08-27 01:53:14,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-08-27 01:53:14,323 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-27 01:53:14,323 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 111 flow [2023-08-27 01:53:14,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:14,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:14,329 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 01:53:14,529 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 01:53:14,529 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:14,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:14,530 INFO L85 PathProgramCache]: Analyzing trace with hash 682239088, now seen corresponding path program 1 times [2023-08-27 01:53:14,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:14,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523797635] [2023-08-27 01:53:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:14,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:53:14,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:14,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523797635] [2023-08-27 01:53:14,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523797635] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:14,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:53:14,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:53:14,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51883329] [2023-08-27 01:53:14,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:14,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:53:14,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:14,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:53:14,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:53:14,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 297 [2023-08-27 01:53:14,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:14,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 297 [2023-08-27 01:53:14,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:14,616 INFO L124 PetriNetUnfolderBase]: 139/217 cut-off events. [2023-08-27 01:53:14,616 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-27 01:53:14,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 217 events. 139/217 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 654 event pairs, 25 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 648. Up to 149 conditions per place. [2023-08-27 01:53:14,619 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 32 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-08-27 01:53:14,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 36 transitions, 198 flow [2023-08-27 01:53:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:53:14,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:53:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-08-27 01:53:14,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377104377104377 [2023-08-27 01:53:14,620 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-08-27 01:53:14,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-08-27 01:53:14,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:14,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-08-27 01:53:14,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,623 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,623 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 111 flow. Second operand 3 states and 390 transitions. [2023-08-27 01:53:14,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 36 transitions, 198 flow [2023-08-27 01:53:14,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:53:14,625 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 110 flow [2023-08-27 01:53:14,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-08-27 01:53:14,625 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-27 01:53:14,625 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 110 flow [2023-08-27 01:53:14,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:14,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:14,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 01:53:14,626 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:14,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:14,627 INFO L85 PathProgramCache]: Analyzing trace with hash 682239100, now seen corresponding path program 1 times [2023-08-27 01:53:14,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:14,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099677476] [2023-08-27 01:53:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:14,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:14,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:14,665 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 01:53:14,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:14,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099677476] [2023-08-27 01:53:14,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099677476] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:14,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302587245] [2023-08-27 01:53:14,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:14,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:14,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:14,669 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 01:53:14,692 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 01:53:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:14,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:53:14,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:14,754 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 01:53:14,754 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:53:14,767 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 01:53:14,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302587245] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:53:14,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:53:14,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 01:53:14,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242428076] [2023-08-27 01:53:14,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:53:14,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 01:53:14,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:14,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 01:53:14,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 01:53:14,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 297 [2023-08-27 01:53:14,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:14,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 297 [2023-08-27 01:53:14,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:14,879 INFO L124 PetriNetUnfolderBase]: 237/351 cut-off events. [2023-08-27 01:53:14,879 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-08-27 01:53:14,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 351 events. 237/351 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1222 event pairs, 51 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 1170. Up to 262 conditions per place. [2023-08-27 01:53:14,882 INFO L140 encePairwiseOnDemand]: 293/297 looper letters, 53 selfloop transitions, 9 changer transitions 0/63 dead transitions. [2023-08-27 01:53:14,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 63 transitions, 368 flow [2023-08-27 01:53:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:53:14,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:53:14,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 784 transitions. [2023-08-27 01:53:14,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4399551066217733 [2023-08-27 01:53:14,884 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 784 transitions. [2023-08-27 01:53:14,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 784 transitions. [2023-08-27 01:53:14,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:14,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 784 transitions. [2023-08-27 01:53:14,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 130.66666666666666) internal successors, (784), 6 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,890 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,890 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 110 flow. Second operand 6 states and 784 transitions. [2023-08-27 01:53:14,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 63 transitions, 368 flow [2023-08-27 01:53:14,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 63 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 01:53:14,892 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 177 flow [2023-08-27 01:53:14,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=177, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2023-08-27 01:53:14,893 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-08-27 01:53:14,893 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 177 flow [2023-08-27 01:53:14,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:14,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:14,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:14,902 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 01:53:15,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:15,099 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:15,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:15,100 INFO L85 PathProgramCache]: Analyzing trace with hash -320994522, now seen corresponding path program 1 times [2023-08-27 01:53:15,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:15,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502011324] [2023-08-27 01:53:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:15,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:15,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:15,163 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 01:53:15,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:15,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502011324] [2023-08-27 01:53:15,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502011324] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:15,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:53:15,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 01:53:15,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24348668] [2023-08-27 01:53:15,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:15,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:53:15,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:15,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:53:15,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:53:15,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 297 [2023-08-27 01:53:15,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:15,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:15,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 297 [2023-08-27 01:53:15,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:15,227 INFO L124 PetriNetUnfolderBase]: 202/298 cut-off events. [2023-08-27 01:53:15,227 INFO L125 PetriNetUnfolderBase]: For 289/295 co-relation queries the response was YES. [2023-08-27 01:53:15,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 298 events. 202/298 cut-off events. For 289/295 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 910 event pairs, 40 based on Foata normal form. 7/196 useless extension candidates. Maximal degree in co-relation 1159. Up to 283 conditions per place. [2023-08-27 01:53:15,229 INFO L140 encePairwiseOnDemand]: 290/297 looper letters, 33 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2023-08-27 01:53:15,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 38 transitions, 256 flow [2023-08-27 01:53:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:53:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:53:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2023-08-27 01:53:15,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2023-08-27 01:53:15,231 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2023-08-27 01:53:15,231 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2023-08-27 01:53:15,231 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:15,231 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2023-08-27 01:53:15,232 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 01:53:15,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:15,234 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:15,234 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 177 flow. Second operand 3 states and 387 transitions. [2023-08-27 01:53:15,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 38 transitions, 256 flow [2023-08-27 01:53:15,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 231 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-27 01:53:15,236 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 169 flow [2023-08-27 01:53:15,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-27 01:53:15,237 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-27 01:53:15,237 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 169 flow [2023-08-27 01:53:15,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:15,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:15,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:15,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 01:53:15,238 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:15,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:15,238 INFO L85 PathProgramCache]: Analyzing trace with hash 2126508240, now seen corresponding path program 1 times [2023-08-27 01:53:15,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:15,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224133933] [2023-08-27 01:53:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:15,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:53:15,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:15,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224133933] [2023-08-27 01:53:15,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224133933] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:15,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:53:15,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:53:15,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051940442] [2023-08-27 01:53:15,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:15,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:53:15,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:15,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:53:15,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 01:53:15,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 297 [2023-08-27 01:53:15,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:15,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:15,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 297 [2023-08-27 01:53:15,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:15,496 INFO L124 PetriNetUnfolderBase]: 329/531 cut-off events. [2023-08-27 01:53:15,496 INFO L125 PetriNetUnfolderBase]: For 517/523 co-relation queries the response was YES. [2023-08-27 01:53:15,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 531 events. 329/531 cut-off events. For 517/523 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1988 event pairs, 56 based on Foata normal form. 20/396 useless extension candidates. Maximal degree in co-relation 2085. Up to 389 conditions per place. [2023-08-27 01:53:15,501 INFO L140 encePairwiseOnDemand]: 289/297 looper letters, 42 selfloop transitions, 25 changer transitions 0/69 dead transitions. [2023-08-27 01:53:15,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 69 transitions, 480 flow [2023-08-27 01:53:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:53:15,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:53:15,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 538 transitions. [2023-08-27 01:53:15,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45286195286195285 [2023-08-27 01:53:15,503 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 538 transitions. [2023-08-27 01:53:15,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 538 transitions. [2023-08-27 01:53:15,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:15,504 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 538 transitions. [2023-08-27 01:53:15,505 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:15,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:15,507 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:15,507 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 169 flow. Second operand 4 states and 538 transitions. [2023-08-27 01:53:15,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 69 transitions, 480 flow [2023-08-27 01:53:15,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 69 transitions, 474 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 01:53:15,513 INFO L231 Difference]: Finished difference. Result has 43 places, 55 transitions, 426 flow [2023-08-27 01:53:15,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=426, PETRI_PLACES=43, PETRI_TRANSITIONS=55} [2023-08-27 01:53:15,515 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2023-08-27 01:53:15,515 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 55 transitions, 426 flow [2023-08-27 01:53:15,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:15,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:15,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:15,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 01:53:15,516 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:15,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash 782484115, now seen corresponding path program 1 times [2023-08-27 01:53:15,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:15,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657574186] [2023-08-27 01:53:15,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:15,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:15,907 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 01:53:15,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:15,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657574186] [2023-08-27 01:53:15,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657574186] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:15,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770229615] [2023-08-27 01:53:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:15,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:15,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:15,909 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 01:53:15,936 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 01:53:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:15,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 01:53:15,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:16,055 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 01:53:16,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:53:16,133 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 18 treesize of output 20 [2023-08-27 01:53:16,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:53:16,210 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 18 treesize of output 20 [2023-08-27 01:53:16,299 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 01:53:16,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:53:16,471 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:53:16,471 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 31 treesize of output 32 [2023-08-27 01:53:16,484 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:53:16,485 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 87 treesize of output 79 [2023-08-27 01:53:16,490 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 56 [2023-08-27 01:53:16,503 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2023-08-27 01:53:16,578 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 01:53:16,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770229615] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:53:16,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:53:16,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2023-08-27 01:53:16,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411215976] [2023-08-27 01:53:16,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:53:16,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 01:53:16,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:16,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 01:53:16,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-08-27 01:53:16,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 01:53:16,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 55 transitions, 426 flow. Second operand has 16 states, 16 states have (on average 85.5) internal successors, (1368), 16 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:16,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:16,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 01:53:16,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:18,342 INFO L124 PetriNetUnfolderBase]: 816/1308 cut-off events. [2023-08-27 01:53:18,343 INFO L125 PetriNetUnfolderBase]: For 2674/2692 co-relation queries the response was YES. [2023-08-27 01:53:18,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6696 conditions, 1308 events. 816/1308 cut-off events. For 2674/2692 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6093 event pairs, 33 based on Foata normal form. 22/937 useless extension candidates. Maximal degree in co-relation 6677. Up to 940 conditions per place. [2023-08-27 01:53:18,356 INFO L140 encePairwiseOnDemand]: 286/297 looper letters, 139 selfloop transitions, 86 changer transitions 1/228 dead transitions. [2023-08-27 01:53:18,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 228 transitions, 2150 flow [2023-08-27 01:53:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 01:53:18,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 01:53:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1918 transitions. [2023-08-27 01:53:18,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3075196408529742 [2023-08-27 01:53:18,363 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1918 transitions. [2023-08-27 01:53:18,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1918 transitions. [2023-08-27 01:53:18,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:18,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1918 transitions. [2023-08-27 01:53:18,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 91.33333333333333) internal successors, (1918), 21 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:18,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 297.0) internal successors, (6534), 22 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:18,377 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 297.0) internal successors, (6534), 22 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:18,377 INFO L175 Difference]: Start difference. First operand has 43 places, 55 transitions, 426 flow. Second operand 21 states and 1918 transitions. [2023-08-27 01:53:18,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 228 transitions, 2150 flow [2023-08-27 01:53:18,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 228 transitions, 1853 flow, removed 143 selfloop flow, removed 1 redundant places. [2023-08-27 01:53:18,394 INFO L231 Difference]: Finished difference. Result has 71 places, 138 transitions, 1323 flow [2023-08-27 01:53:18,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1323, PETRI_PLACES=71, PETRI_TRANSITIONS=138} [2023-08-27 01:53:18,395 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2023-08-27 01:53:18,395 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 138 transitions, 1323 flow [2023-08-27 01:53:18,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 85.5) internal successors, (1368), 16 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:18,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:18,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:18,407 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 01:53:18,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-27 01:53:18,602 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:18,602 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:18,602 INFO L85 PathProgramCache]: Analyzing trace with hash 791296434, now seen corresponding path program 1 times [2023-08-27 01:53:18,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:18,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220347615] [2023-08-27 01:53:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:18,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:19,018 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 01:53:19,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:19,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220347615] [2023-08-27 01:53:19,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220347615] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:19,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144819158] [2023-08-27 01:53:19,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:19,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:19,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:19,020 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 01:53:19,048 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 01:53:19,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:19,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 01:53:19,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:19,152 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 01:53:19,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:53:19,209 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 01:53:19,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:53:19,315 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 01:53:19,371 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 01:53:19,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:53:21,568 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:53:21,568 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 32 treesize of output 33 [2023-08-27 01:53:21,577 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:53:21,577 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 93 treesize of output 85 [2023-08-27 01:53:21,584 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2023-08-27 01:53:21,589 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 54 [2023-08-27 01:53:21,667 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 01:53:21,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144819158] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:53:21,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:53:21,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-27 01:53:21,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665980805] [2023-08-27 01:53:21,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:53:21,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 01:53:21,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:21,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 01:53:21,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=215, Unknown=6, NotChecked=0, Total=272 [2023-08-27 01:53:21,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 01:53:21,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 138 transitions, 1323 flow. Second operand has 17 states, 17 states have (on average 85.41176470588235) internal successors, (1452), 17 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:21,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:21,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 01:53:21,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:22,651 INFO L124 PetriNetUnfolderBase]: 788/1276 cut-off events. [2023-08-27 01:53:22,651 INFO L125 PetriNetUnfolderBase]: For 4898/4918 co-relation queries the response was YES. [2023-08-27 01:53:22,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7268 conditions, 1276 events. 788/1276 cut-off events. For 4898/4918 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6011 event pairs, 104 based on Foata normal form. 20/1007 useless extension candidates. Maximal degree in co-relation 7239. Up to 1009 conditions per place. [2023-08-27 01:53:22,664 INFO L140 encePairwiseOnDemand]: 286/297 looper letters, 128 selfloop transitions, 39 changer transitions 0/169 dead transitions. [2023-08-27 01:53:22,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 169 transitions, 1980 flow [2023-08-27 01:53:22,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 01:53:22,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 01:53:22,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1071 transitions. [2023-08-27 01:53:22,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3005050505050505 [2023-08-27 01:53:22,669 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1071 transitions. [2023-08-27 01:53:22,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1071 transitions. [2023-08-27 01:53:22,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:22,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1071 transitions. [2023-08-27 01:53:22,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 89.25) internal successors, (1071), 12 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:22,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 297.0) internal successors, (3861), 13 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:22,676 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 297.0) internal successors, (3861), 13 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:22,676 INFO L175 Difference]: Start difference. First operand has 71 places, 138 transitions, 1323 flow. Second operand 12 states and 1071 transitions. [2023-08-27 01:53:22,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 169 transitions, 1980 flow [2023-08-27 01:53:22,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 169 transitions, 1858 flow, removed 57 selfloop flow, removed 3 redundant places. [2023-08-27 01:53:22,700 INFO L231 Difference]: Finished difference. Result has 81 places, 135 transitions, 1289 flow [2023-08-27 01:53:22,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1289, PETRI_PLACES=81, PETRI_TRANSITIONS=135} [2023-08-27 01:53:22,701 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2023-08-27 01:53:22,702 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 135 transitions, 1289 flow [2023-08-27 01:53:22,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.41176470588235) internal successors, (1452), 17 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:22,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:22,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:22,709 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 01:53:22,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:22,908 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:22,909 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:22,909 INFO L85 PathProgramCache]: Analyzing trace with hash 791296485, now seen corresponding path program 1 times [2023-08-27 01:53:22,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:22,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450955598] [2023-08-27 01:53:22,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:22,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:22,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:23,463 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 01:53:23,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:23,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450955598] [2023-08-27 01:53:23,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450955598] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:23,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283989730] [2023-08-27 01:53:23,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:23,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:23,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:23,465 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 01:53:23,488 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 01:53:23,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:23,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 01:53:23,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:23,610 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 01:53:23,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:53:23,657 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 01:53:23,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:53:23,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 01:53:23,785 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 01:53:23,786 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:53:23,934 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:53:23,934 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 31 treesize of output 32 [2023-08-27 01:53:23,943 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:53:23,944 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 173 treesize of output 157 [2023-08-27 01:53:23,952 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2023-08-27 01:53:23,981 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-08-27 01:53:24,016 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 01:53:24,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283989730] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:53:24,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:53:24,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-27 01:53:24,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957562340] [2023-08-27 01:53:24,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:53:24,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 01:53:24,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:24,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 01:53:24,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=216, Unknown=3, NotChecked=0, Total=272 [2023-08-27 01:53:24,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 01:53:24,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 135 transitions, 1289 flow. Second operand has 17 states, 17 states have (on average 85.41176470588235) internal successors, (1452), 17 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:24,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:24,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 01:53:24,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:26,326 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 01:53:26,745 INFO L124 PetriNetUnfolderBase]: 723/1156 cut-off events. [2023-08-27 01:53:26,745 INFO L125 PetriNetUnfolderBase]: For 4790/4808 co-relation queries the response was YES. [2023-08-27 01:53:26,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6607 conditions, 1156 events. 723/1156 cut-off events. For 4790/4808 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5137 event pairs, 102 based on Foata normal form. 54/927 useless extension candidates. Maximal degree in co-relation 6575. Up to 888 conditions per place. [2023-08-27 01:53:26,758 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 123 selfloop transitions, 33 changer transitions 0/158 dead transitions. [2023-08-27 01:53:26,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 158 transitions, 1823 flow [2023-08-27 01:53:26,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 01:53:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 01:53:26,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 898 transitions. [2023-08-27 01:53:26,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3023569023569024 [2023-08-27 01:53:26,761 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 898 transitions. [2023-08-27 01:53:26,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 898 transitions. [2023-08-27 01:53:26,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:26,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 898 transitions. [2023-08-27 01:53:26,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 89.8) internal successors, (898), 10 states have internal predecessors, (898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:26,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 297.0) internal successors, (3267), 11 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:26,767 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 297.0) internal successors, (3267), 11 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:26,767 INFO L175 Difference]: Start difference. First operand has 81 places, 135 transitions, 1289 flow. Second operand 10 states and 898 transitions. [2023-08-27 01:53:26,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 158 transitions, 1823 flow [2023-08-27 01:53:26,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 158 transitions, 1711 flow, removed 33 selfloop flow, removed 9 redundant places. [2023-08-27 01:53:26,784 INFO L231 Difference]: Finished difference. Result has 81 places, 124 transitions, 1156 flow [2023-08-27 01:53:26,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1090, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1156, PETRI_PLACES=81, PETRI_TRANSITIONS=124} [2023-08-27 01:53:26,785 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2023-08-27 01:53:26,785 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 124 transitions, 1156 flow [2023-08-27 01:53:26,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.41176470588235) internal successors, (1452), 17 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:26,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:26,785 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:26,791 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 01:53:26,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:26,992 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:26,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:26,992 INFO L85 PathProgramCache]: Analyzing trace with hash -934543508, now seen corresponding path program 1 times [2023-08-27 01:53:26,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:26,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952708171] [2023-08-27 01:53:26,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:26,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:53:27,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:27,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952708171] [2023-08-27 01:53:27,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952708171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:27,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130374762] [2023-08-27 01:53:27,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:27,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:27,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:27,075 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 01:53:27,103 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 01:53:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:27,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 01:53:27,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:27,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:53:27,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:53:27,315 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:53:27,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130374762] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:53:27,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:53:27,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-08-27 01:53:27,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769958584] [2023-08-27 01:53:27,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:53:27,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 01:53:27,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:27,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 01:53:27,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-27 01:53:27,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 297 [2023-08-27 01:53:27,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 124 transitions, 1156 flow. Second operand has 14 states, 14 states have (on average 105.85714285714286) internal successors, (1482), 14 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:27,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:27,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 297 [2023-08-27 01:53:27,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:27,628 INFO L124 PetriNetUnfolderBase]: 605/989 cut-off events. [2023-08-27 01:53:27,629 INFO L125 PetriNetUnfolderBase]: For 3082/3082 co-relation queries the response was YES. [2023-08-27 01:53:27,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5412 conditions, 989 events. 605/989 cut-off events. For 3082/3082 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 4173 event pairs, 79 based on Foata normal form. 56/790 useless extension candidates. Maximal degree in co-relation 5382. Up to 578 conditions per place. [2023-08-27 01:53:27,638 INFO L140 encePairwiseOnDemand]: 290/297 looper letters, 139 selfloop transitions, 44 changer transitions 11/195 dead transitions. [2023-08-27 01:53:27,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 195 transitions, 2104 flow [2023-08-27 01:53:27,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 01:53:27,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 01:53:27,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1442 transitions. [2023-08-27 01:53:27,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3734783734783735 [2023-08-27 01:53:27,642 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1442 transitions. [2023-08-27 01:53:27,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1442 transitions. [2023-08-27 01:53:27,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:27,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1442 transitions. [2023-08-27 01:53:27,646 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 110.92307692307692) internal successors, (1442), 13 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:27,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 297.0) internal successors, (4158), 14 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:27,662 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 297.0) internal successors, (4158), 14 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:27,662 INFO L175 Difference]: Start difference. First operand has 81 places, 124 transitions, 1156 flow. Second operand 13 states and 1442 transitions. [2023-08-27 01:53:27,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 195 transitions, 2104 flow [2023-08-27 01:53:27,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 195 transitions, 1982 flow, removed 14 selfloop flow, removed 11 redundant places. [2023-08-27 01:53:27,675 INFO L231 Difference]: Finished difference. Result has 78 places, 100 transitions, 985 flow [2023-08-27 01:53:27,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=985, PETRI_PLACES=78, PETRI_TRANSITIONS=100} [2023-08-27 01:53:27,675 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 45 predicate places. [2023-08-27 01:53:27,676 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 100 transitions, 985 flow [2023-08-27 01:53:27,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 105.85714285714286) internal successors, (1482), 14 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:27,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:27,678 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:27,689 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 01:53:27,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 01:53:27,884 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:27,884 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:27,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2009375044, now seen corresponding path program 1 times [2023-08-27 01:53:27,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:27,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605555427] [2023-08-27 01:53:27,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:27,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:27,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:29,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:53:29,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:29,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605555427] [2023-08-27 01:53:29,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605555427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:29,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262894167] [2023-08-27 01:53:29,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:29,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:29,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:29,073 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 01:53:29,096 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 01:53:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:29,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 01:53:29,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:29,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:53:29,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:53:29,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262894167] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:29,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:53:29,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2023-08-27 01:53:29,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893126290] [2023-08-27 01:53:29,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:29,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:53:29,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:29,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:53:29,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-08-27 01:53:29,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 297 [2023-08-27 01:53:29,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 100 transitions, 985 flow. Second operand has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:29,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:29,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 297 [2023-08-27 01:53:29,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:29,398 INFO L124 PetriNetUnfolderBase]: 614/992 cut-off events. [2023-08-27 01:53:29,398 INFO L125 PetriNetUnfolderBase]: For 3706/3726 co-relation queries the response was YES. [2023-08-27 01:53:29,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5686 conditions, 992 events. 614/992 cut-off events. For 3706/3726 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 4104 event pairs, 44 based on Foata normal form. 14/763 useless extension candidates. Maximal degree in co-relation 5657. Up to 821 conditions per place. [2023-08-27 01:53:29,407 INFO L140 encePairwiseOnDemand]: 289/297 looper letters, 100 selfloop transitions, 18 changer transitions 1/122 dead transitions. [2023-08-27 01:53:29,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 122 transitions, 1422 flow [2023-08-27 01:53:29,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:53:29,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:53:29,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 463 transitions. [2023-08-27 01:53:29,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897306397306397 [2023-08-27 01:53:29,409 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 463 transitions. [2023-08-27 01:53:29,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 463 transitions. [2023-08-27 01:53:29,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:29,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 463 transitions. [2023-08-27 01:53:29,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:29,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:29,412 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:29,412 INFO L175 Difference]: Start difference. First operand has 78 places, 100 transitions, 985 flow. Second operand 4 states and 463 transitions. [2023-08-27 01:53:29,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 122 transitions, 1422 flow [2023-08-27 01:53:29,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 122 transitions, 1311 flow, removed 27 selfloop flow, removed 8 redundant places. [2023-08-27 01:53:29,424 INFO L231 Difference]: Finished difference. Result has 71 places, 103 transitions, 990 flow [2023-08-27 01:53:29,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=990, PETRI_PLACES=71, PETRI_TRANSITIONS=103} [2023-08-27 01:53:29,424 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2023-08-27 01:53:29,424 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 103 transitions, 990 flow [2023-08-27 01:53:29,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:29,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:29,425 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:29,430 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 01:53:29,627 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,SelfDestructingSolverStorable15 [2023-08-27 01:53:29,627 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:29,628 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:29,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2044240124, now seen corresponding path program 2 times [2023-08-27 01:53:29,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:29,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759750434] [2023-08-27 01:53:29,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:29,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:29,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:53:30,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:30,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759750434] [2023-08-27 01:53:30,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759750434] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:30,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102866925] [2023-08-27 01:53:30,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:53:30,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:30,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:30,478 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 01:53:30,483 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 01:53:30,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:53:30,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:53:30,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 01:53:30,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:30,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:53:30,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:53:30,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102866925] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:30,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:53:30,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2023-08-27 01:53:30,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542549] [2023-08-27 01:53:30,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:30,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:53:30,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:30,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:53:30,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-08-27 01:53:30,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 297 [2023-08-27 01:53:30,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 103 transitions, 990 flow. Second operand has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:30,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:30,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 297 [2023-08-27 01:53:30,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:30,802 INFO L124 PetriNetUnfolderBase]: 632/1015 cut-off events. [2023-08-27 01:53:30,802 INFO L125 PetriNetUnfolderBase]: For 3264/3284 co-relation queries the response was YES. [2023-08-27 01:53:30,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5885 conditions, 1015 events. 632/1015 cut-off events. For 3264/3284 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 4210 event pairs, 89 based on Foata normal form. 14/823 useless extension candidates. Maximal degree in co-relation 5856. Up to 951 conditions per place. [2023-08-27 01:53:30,811 INFO L140 encePairwiseOnDemand]: 289/297 looper letters, 92 selfloop transitions, 16 changer transitions 0/111 dead transitions. [2023-08-27 01:53:30,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 111 transitions, 1240 flow [2023-08-27 01:53:30,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:53:30,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:53:30,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 460 transitions. [2023-08-27 01:53:30,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3872053872053872 [2023-08-27 01:53:30,813 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 460 transitions. [2023-08-27 01:53:30,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 460 transitions. [2023-08-27 01:53:30,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:30,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 460 transitions. [2023-08-27 01:53:30,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.0) internal successors, (460), 4 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:30,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:30,816 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:30,816 INFO L175 Difference]: Start difference. First operand has 71 places, 103 transitions, 990 flow. Second operand 4 states and 460 transitions. [2023-08-27 01:53:30,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 111 transitions, 1240 flow [2023-08-27 01:53:30,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 111 transitions, 1199 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-27 01:53:30,828 INFO L231 Difference]: Finished difference. Result has 72 places, 105 transitions, 1022 flow [2023-08-27 01:53:30,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1022, PETRI_PLACES=72, PETRI_TRANSITIONS=105} [2023-08-27 01:53:30,829 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 39 predicate places. [2023-08-27 01:53:30,829 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 105 transitions, 1022 flow [2023-08-27 01:53:30,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.0) internal successors, (436), 4 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:30,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:30,829 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:30,835 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 01:53:31,034 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,SelfDestructingSolverStorable16 [2023-08-27 01:53:31,035 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:31,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:31,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1979412187, now seen corresponding path program 2 times [2023-08-27 01:53:31,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:31,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162945556] [2023-08-27 01:53:31,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:31,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:31,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:53:31,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:31,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162945556] [2023-08-27 01:53:31,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162945556] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:31,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866366549] [2023-08-27 01:53:31,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:53:31,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:31,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:31,754 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 01:53:31,756 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 01:53:31,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:53:31,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:53:31,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 01:53:31,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:31,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:53:31,961 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 18 treesize of output 20 [2023-08-27 01:53:32,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:53:32,002 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:53:32,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866366549] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:32,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:53:32,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-08-27 01:53:32,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214214368] [2023-08-27 01:53:32,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:32,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 01:53:32,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:32,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 01:53:32,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-08-27 01:53:32,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 297 [2023-08-27 01:53:32,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 105 transitions, 1022 flow. Second operand has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:32,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:32,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 297 [2023-08-27 01:53:32,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:32,213 INFO L124 PetriNetUnfolderBase]: 620/1004 cut-off events. [2023-08-27 01:53:32,213 INFO L125 PetriNetUnfolderBase]: For 3513/3533 co-relation queries the response was YES. [2023-08-27 01:53:32,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5738 conditions, 1004 events. 620/1004 cut-off events. For 3513/3533 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 4176 event pairs, 89 based on Foata normal form. 22/826 useless extension candidates. Maximal degree in co-relation 5709. Up to 925 conditions per place. [2023-08-27 01:53:32,220 INFO L140 encePairwiseOnDemand]: 290/297 looper letters, 94 selfloop transitions, 16 changer transitions 0/113 dead transitions. [2023-08-27 01:53:32,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 113 transitions, 1274 flow [2023-08-27 01:53:32,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:53:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:53:32,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 432 transitions. [2023-08-27 01:53:32,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2023-08-27 01:53:32,222 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 432 transitions. [2023-08-27 01:53:32,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 432 transitions. [2023-08-27 01:53:32,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:32,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 432 transitions. [2023-08-27 01:53:32,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:32,224 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:32,225 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:32,225 INFO L175 Difference]: Start difference. First operand has 72 places, 105 transitions, 1022 flow. Second operand 4 states and 432 transitions. [2023-08-27 01:53:32,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 113 transitions, 1274 flow [2023-08-27 01:53:32,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 1249 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-27 01:53:32,237 INFO L231 Difference]: Finished difference. Result has 74 places, 107 transitions, 1070 flow [2023-08-27 01:53:32,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=980, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1070, PETRI_PLACES=74, PETRI_TRANSITIONS=107} [2023-08-27 01:53:32,238 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 41 predicate places. [2023-08-27 01:53:32,238 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 107 transitions, 1070 flow [2023-08-27 01:53:32,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:32,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:32,238 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:32,244 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 01:53:32,444 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,SelfDestructingSolverStorable17 [2023-08-27 01:53:32,444 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:32,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:32,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1970176977, now seen corresponding path program 2 times [2023-08-27 01:53:32,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:32,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034156627] [2023-08-27 01:53:32,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:32,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:53:33,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:33,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034156627] [2023-08-27 01:53:33,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034156627] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:33,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552426294] [2023-08-27 01:53:33,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:53:33,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:33,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:33,311 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 01:53:33,314 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 01:53:33,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:53:33,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:53:33,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 01:53:33,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:33,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:53:33,535 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 18 treesize of output 20 [2023-08-27 01:53:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:53:33,559 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:53:33,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552426294] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:33,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:53:33,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-08-27 01:53:33,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908466789] [2023-08-27 01:53:33,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:33,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 01:53:33,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:33,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 01:53:33,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-27 01:53:33,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 297 [2023-08-27 01:53:33,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 107 transitions, 1070 flow. Second operand has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:33,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:33,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 297 [2023-08-27 01:53:33,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:33,769 INFO L124 PetriNetUnfolderBase]: 540/918 cut-off events. [2023-08-27 01:53:33,770 INFO L125 PetriNetUnfolderBase]: For 3820/3840 co-relation queries the response was YES. [2023-08-27 01:53:33,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5315 conditions, 918 events. 540/918 cut-off events. For 3820/3840 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3856 event pairs, 47 based on Foata normal form. 18/804 useless extension candidates. Maximal degree in co-relation 5285. Up to 597 conditions per place. [2023-08-27 01:53:33,776 INFO L140 encePairwiseOnDemand]: 290/297 looper letters, 98 selfloop transitions, 20 changer transitions 0/121 dead transitions. [2023-08-27 01:53:33,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 121 transitions, 1426 flow [2023-08-27 01:53:33,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:53:33,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:53:33,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 435 transitions. [2023-08-27 01:53:33,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3661616161616162 [2023-08-27 01:53:33,778 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 435 transitions. [2023-08-27 01:53:33,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 435 transitions. [2023-08-27 01:53:33,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:33,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 435 transitions. [2023-08-27 01:53:33,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:33,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:33,781 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:33,781 INFO L175 Difference]: Start difference. First operand has 74 places, 107 transitions, 1070 flow. Second operand 4 states and 435 transitions. [2023-08-27 01:53:33,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 121 transitions, 1426 flow [2023-08-27 01:53:33,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 121 transitions, 1396 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-27 01:53:33,794 INFO L231 Difference]: Finished difference. Result has 75 places, 106 transitions, 1110 flow [2023-08-27 01:53:33,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=988, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1110, PETRI_PLACES=75, PETRI_TRANSITIONS=106} [2023-08-27 01:53:33,795 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 42 predicate places. [2023-08-27 01:53:33,795 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 106 transitions, 1110 flow [2023-08-27 01:53:33,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:33,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:33,795 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:33,801 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 01:53:34,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:34,001 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:34,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:34,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1979412238, now seen corresponding path program 3 times [2023-08-27 01:53:34,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:34,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551942037] [2023-08-27 01:53:34,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:34,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:53:34,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:34,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551942037] [2023-08-27 01:53:34,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551942037] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:34,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309723356] [2023-08-27 01:53:34,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:53:34,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:34,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:34,963 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 01:53:34,966 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 01:53:35,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 01:53:35,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:53:35,053 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 01:53:35,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:35,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:53:35,151 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 18 treesize of output 20 [2023-08-27 01:53:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:53:35,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:53:35,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309723356] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:35,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:53:35,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-08-27 01:53:35,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126686202] [2023-08-27 01:53:35,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:35,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 01:53:35,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:35,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 01:53:35,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-27 01:53:35,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 297 [2023-08-27 01:53:35,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 106 transitions, 1110 flow. Second operand has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:35,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:35,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 297 [2023-08-27 01:53:35,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:35,367 INFO L124 PetriNetUnfolderBase]: 536/914 cut-off events. [2023-08-27 01:53:35,367 INFO L125 PetriNetUnfolderBase]: For 4065/4085 co-relation queries the response was YES. [2023-08-27 01:53:35,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5541 conditions, 914 events. 536/914 cut-off events. For 4065/4085 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3850 event pairs, 85 based on Foata normal form. 14/800 useless extension candidates. Maximal degree in co-relation 5511. Up to 835 conditions per place. [2023-08-27 01:53:35,373 INFO L140 encePairwiseOnDemand]: 292/297 looper letters, 93 selfloop transitions, 15 changer transitions 0/111 dead transitions. [2023-08-27 01:53:35,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 111 transitions, 1329 flow [2023-08-27 01:53:35,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:53:35,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:53:35,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 430 transitions. [2023-08-27 01:53:35,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36195286195286197 [2023-08-27 01:53:35,375 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 430 transitions. [2023-08-27 01:53:35,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 430 transitions. [2023-08-27 01:53:35,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:35,375 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 430 transitions. [2023-08-27 01:53:35,376 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:35,377 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:35,377 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:35,377 INFO L175 Difference]: Start difference. First operand has 75 places, 106 transitions, 1110 flow. Second operand 4 states and 430 transitions. [2023-08-27 01:53:35,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 111 transitions, 1329 flow [2023-08-27 01:53:35,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 111 transitions, 1289 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-27 01:53:35,390 INFO L231 Difference]: Finished difference. Result has 76 places, 105 transitions, 1088 flow [2023-08-27 01:53:35,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1088, PETRI_PLACES=76, PETRI_TRANSITIONS=105} [2023-08-27 01:53:35,390 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 43 predicate places. [2023-08-27 01:53:35,391 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 105 transitions, 1088 flow [2023-08-27 01:53:35,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:35,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:35,391 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:35,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 01:53:35,597 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,SelfDestructingSolverStorable19 [2023-08-27 01:53:35,597 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:35,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:35,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1970177028, now seen corresponding path program 2 times [2023-08-27 01:53:35,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:35,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522428203] [2023-08-27 01:53:35,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:35,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:53:36,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:36,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522428203] [2023-08-27 01:53:36,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522428203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:36,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930333188] [2023-08-27 01:53:36,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:53:36,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:36,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:36,253 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 01:53:36,254 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 01:53:36,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:53:36,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:53:36,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 01:53:36,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:36,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:53:36,432 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 18 treesize of output 20 [2023-08-27 01:53:36,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:53:36,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:53:36,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930333188] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:36,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:53:36,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-08-27 01:53:36,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401571878] [2023-08-27 01:53:36,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:36,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 01:53:36,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:36,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 01:53:36,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-08-27 01:53:36,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 297 [2023-08-27 01:53:36,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 105 transitions, 1088 flow. Second operand has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:36,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:36,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 297 [2023-08-27 01:53:36,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:36,671 INFO L124 PetriNetUnfolderBase]: 514/888 cut-off events. [2023-08-27 01:53:36,671 INFO L125 PetriNetUnfolderBase]: For 4089/4109 co-relation queries the response was YES. [2023-08-27 01:53:36,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5273 conditions, 888 events. 514/888 cut-off events. For 4089/4109 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3725 event pairs, 46 based on Foata normal form. 14/790 useless extension candidates. Maximal degree in co-relation 5243. Up to 567 conditions per place. [2023-08-27 01:53:36,677 INFO L140 encePairwiseOnDemand]: 292/297 looper letters, 97 selfloop transitions, 18 changer transitions 0/118 dead transitions. [2023-08-27 01:53:36,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 118 transitions, 1414 flow [2023-08-27 01:53:36,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:53:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:53:36,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 433 transitions. [2023-08-27 01:53:36,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36447811447811446 [2023-08-27 01:53:36,678 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 433 transitions. [2023-08-27 01:53:36,678 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 433 transitions. [2023-08-27 01:53:36,678 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:36,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 433 transitions. [2023-08-27 01:53:36,679 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.25) internal successors, (433), 4 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:36,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:36,681 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:36,681 INFO L175 Difference]: Start difference. First operand has 76 places, 105 transitions, 1088 flow. Second operand 4 states and 433 transitions. [2023-08-27 01:53:36,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 118 transitions, 1414 flow [2023-08-27 01:53:36,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 118 transitions, 1384 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 01:53:36,692 INFO L231 Difference]: Finished difference. Result has 76 places, 103 transitions, 1070 flow [2023-08-27 01:53:36,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1034, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1070, PETRI_PLACES=76, PETRI_TRANSITIONS=103} [2023-08-27 01:53:36,692 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 43 predicate places. [2023-08-27 01:53:36,692 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 103 transitions, 1070 flow [2023-08-27 01:53:36,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:36,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:36,693 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:36,703 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 01:53:36,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:36,899 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:36,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:36,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1180169854, now seen corresponding path program 2 times [2023-08-27 01:53:36,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:36,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344447518] [2023-08-27 01:53:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:36,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:36,988 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:53:36,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:36,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344447518] [2023-08-27 01:53:36,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344447518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:36,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595746694] [2023-08-27 01:53:36,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:53:36,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:36,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:37,013 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 01:53:37,016 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 01:53:37,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:53:37,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:53:37,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:53:37,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-27 01:53:37,120 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:53:37,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595746694] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:53:37,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:53:37,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [7] total 8 [2023-08-27 01:53:37,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057375538] [2023-08-27 01:53:37,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:53:37,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:53:37,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:37,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:53:37,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-08-27 01:53:37,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 297 [2023-08-27 01:53:37,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 103 transitions, 1070 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:37,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:37,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 297 [2023-08-27 01:53:37,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:37,238 INFO L124 PetriNetUnfolderBase]: 464/796 cut-off events. [2023-08-27 01:53:37,238 INFO L125 PetriNetUnfolderBase]: For 4033/4053 co-relation queries the response was YES. [2023-08-27 01:53:37,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4691 conditions, 796 events. 464/796 cut-off events. For 4033/4053 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3305 event pairs, 156 based on Foata normal form. 55/737 useless extension candidates. Maximal degree in co-relation 4661. Up to 778 conditions per place. [2023-08-27 01:53:37,243 INFO L140 encePairwiseOnDemand]: 295/297 looper letters, 93 selfloop transitions, 1 changer transitions 0/97 dead transitions. [2023-08-27 01:53:37,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 97 transitions, 1174 flow [2023-08-27 01:53:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:53:37,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:53:37,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-27 01:53:37,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276094276094276 [2023-08-27 01:53:37,245 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-27 01:53:37,245 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-27 01:53:37,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:37,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-27 01:53:37,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:37,246 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:37,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:37,247 INFO L175 Difference]: Start difference. First operand has 76 places, 103 transitions, 1070 flow. Second operand 3 states and 381 transitions. [2023-08-27 01:53:37,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 97 transitions, 1174 flow [2023-08-27 01:53:37,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 97 transitions, 1086 flow, removed 2 selfloop flow, removed 9 redundant places. [2023-08-27 01:53:37,257 INFO L231 Difference]: Finished difference. Result has 67 places, 97 transitions, 900 flow [2023-08-27 01:53:37,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=900, PETRI_PLACES=67, PETRI_TRANSITIONS=97} [2023-08-27 01:53:37,257 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 34 predicate places. [2023-08-27 01:53:37,257 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 97 transitions, 900 flow [2023-08-27 01:53:37,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:37,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:37,258 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:37,266 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 01:53:37,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:37,464 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:37,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:37,464 INFO L85 PathProgramCache]: Analyzing trace with hash -777305319, now seen corresponding path program 1 times [2023-08-27 01:53:37,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:37,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660717846] [2023-08-27 01:53:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:37,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:37,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:37,918 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 01:53:37,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:37,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660717846] [2023-08-27 01:53:37,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660717846] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:37,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139542943] [2023-08-27 01:53:37,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:37,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:37,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:37,921 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 01:53:37,943 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 01:53:38,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:38,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-27 01:53:38,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:38,077 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 16 treesize of output 12 [2023-08-27 01:53:38,115 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 01:53:38,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:53:38,175 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 01:53:38,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:53:38,231 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 01:53:38,477 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 01:53:38,477 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:53:38,862 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:53:38,862 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 115 treesize of output 80 [2023-08-27 01:53:38,888 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:53:38,889 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 200 treesize of output 212 [2023-08-27 01:53:38,909 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:53:38,909 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 141 [2023-08-27 01:53:38,935 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:53:38,935 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 93 [2023-08-27 01:53:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:53:39,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139542943] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:53:39,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:53:39,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-27 01:53:39,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206061030] [2023-08-27 01:53:39,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:53:39,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 01:53:39,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:39,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 01:53:39,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=507, Unknown=2, NotChecked=0, Total=600 [2023-08-27 01:53:39,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 01:53:39,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 97 transitions, 900 flow. Second operand has 25 states, 25 states have (on average 85.32) internal successors, (2133), 25 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:39,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:39,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 01:53:39,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:53:42,989 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:53:45,333 WARN L539 Checker$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 01:53:47,819 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 01:53:49,137 INFO L124 PetriNetUnfolderBase]: 735/1190 cut-off events. [2023-08-27 01:53:49,137 INFO L125 PetriNetUnfolderBase]: For 4176/4192 co-relation queries the response was YES. [2023-08-27 01:53:49,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6823 conditions, 1190 events. 735/1190 cut-off events. For 4176/4192 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5161 event pairs, 20 based on Foata normal form. 26/1006 useless extension candidates. Maximal degree in co-relation 6798. Up to 734 conditions per place. [2023-08-27 01:53:49,145 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 134 selfloop transitions, 107 changer transitions 0/244 dead transitions. [2023-08-27 01:53:49,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 244 transitions, 2573 flow [2023-08-27 01:53:49,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 01:53:49,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 01:53:49,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2423 transitions. [2023-08-27 01:53:49,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3021573762314503 [2023-08-27 01:53:49,149 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2423 transitions. [2023-08-27 01:53:49,149 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2423 transitions. [2023-08-27 01:53:49,150 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:53:49,150 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2423 transitions. [2023-08-27 01:53:49,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 89.74074074074075) internal successors, (2423), 27 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:49,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 297.0) internal successors, (8316), 28 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:49,162 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 297.0) internal successors, (8316), 28 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:49,162 INFO L175 Difference]: Start difference. First operand has 67 places, 97 transitions, 900 flow. Second operand 27 states and 2423 transitions. [2023-08-27 01:53:49,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 244 transitions, 2573 flow [2023-08-27 01:53:49,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 244 transitions, 2572 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:53:49,177 INFO L231 Difference]: Finished difference. Result has 103 places, 168 transitions, 2154 flow [2023-08-27 01:53:49,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2154, PETRI_PLACES=103, PETRI_TRANSITIONS=168} [2023-08-27 01:53:49,178 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 70 predicate places. [2023-08-27 01:53:49,178 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 168 transitions, 2154 flow [2023-08-27 01:53:49,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 85.32) internal successors, (2133), 25 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:49,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:53:49,179 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:53:49,187 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 01:53:49,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-27 01:53:49,385 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:53:49,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:53:49,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1198946906, now seen corresponding path program 2 times [2023-08-27 01:53:49,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:53:49,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364369265] [2023-08-27 01:53:49,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:53:49,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:53:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:53:49,943 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 01:53:49,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:53:49,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364369265] [2023-08-27 01:53:49,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364369265] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:53:49,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265099833] [2023-08-27 01:53:49,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:53:49,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:53:49,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:53:49,945 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 01:53:49,946 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 01:53:50,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:53:50,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:53:50,038 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-27 01:53:50,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:53:50,099 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 01:53:50,136 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 01:53:50,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:53:50,262 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 29 treesize of output 29 [2023-08-27 01:53:50,378 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 01:53:50,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:53:52,789 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:53:52,790 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 78 [2023-08-27 01:53:52,833 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:53:52,833 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 174 treesize of output 177 [2023-08-27 01:53:52,843 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 67 [2023-08-27 01:53:52,886 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:53:52,886 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 88 treesize of output 99 [2023-08-27 01:53:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:53:53,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265099833] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:53:53,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:53:53,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-27 01:53:53,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294015015] [2023-08-27 01:53:53,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:53:53,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 01:53:53,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:53:53,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 01:53:53,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=538, Unknown=1, NotChecked=0, Total=650 [2023-08-27 01:53:53,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 01:53:53,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 168 transitions, 2154 flow. Second operand has 26 states, 26 states have (on average 85.26923076923077) internal successors, (2217), 26 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:53:53,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:53:53,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 01:53:53,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:05,148 WARN L234 SmtUtils]: Spent 6.12s on a formula simplification that was a NOOP. DAG size: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:54:18,725 INFO L124 PetriNetUnfolderBase]: 1210/1972 cut-off events. [2023-08-27 01:54:18,725 INFO L125 PetriNetUnfolderBase]: For 17475/17491 co-relation queries the response was YES. [2023-08-27 01:54:18,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14525 conditions, 1972 events. 1210/1972 cut-off events. For 17475/17491 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 9782 event pairs, 148 based on Foata normal form. 106/1806 useless extension candidates. Maximal degree in co-relation 14488. Up to 968 conditions per place. [2023-08-27 01:54:18,740 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 231 selfloop transitions, 90 changer transitions 0/324 dead transitions. [2023-08-27 01:54:18,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 324 transitions, 4548 flow [2023-08-27 01:54:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 01:54:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 01:54:18,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2075 transitions. [2023-08-27 01:54:18,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30376226028399944 [2023-08-27 01:54:18,744 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2075 transitions. [2023-08-27 01:54:18,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2075 transitions. [2023-08-27 01:54:18,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:54:18,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2075 transitions. [2023-08-27 01:54:18,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 90.21739130434783) internal successors, (2075), 23 states have internal predecessors, (2075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:18,753 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 297.0) internal successors, (7128), 24 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:18,754 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 297.0) internal successors, (7128), 24 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:18,755 INFO L175 Difference]: Start difference. First operand has 103 places, 168 transitions, 2154 flow. Second operand 23 states and 2075 transitions. [2023-08-27 01:54:18,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 324 transitions, 4548 flow [2023-08-27 01:54:18,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 324 transitions, 4190 flow, removed 170 selfloop flow, removed 7 redundant places. [2023-08-27 01:54:18,821 INFO L231 Difference]: Finished difference. Result has 126 places, 196 transitions, 2805 flow [2023-08-27 01:54:18,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1563, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2805, PETRI_PLACES=126, PETRI_TRANSITIONS=196} [2023-08-27 01:54:18,822 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 93 predicate places. [2023-08-27 01:54:18,822 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 196 transitions, 2805 flow [2023-08-27 01:54:18,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 85.26923076923077) internal successors, (2217), 26 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:18,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:54:18,823 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:54:18,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 01:54:19,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:19,029 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:54:19,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:54:19,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1762720346, now seen corresponding path program 3 times [2023-08-27 01:54:19,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:54:19,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471893739] [2023-08-27 01:54:19,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:54:19,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:54:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:54:19,762 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 01:54:19,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:54:19,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471893739] [2023-08-27 01:54:19,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471893739] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:54:19,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064507178] [2023-08-27 01:54:19,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:54:19,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:54:19,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:54:19,763 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 01:54:19,765 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 01:54:19,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:54:19,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:54:19,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-27 01:54:19,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:54:19,919 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 01:54:19,967 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 01:54:20,004 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 01:54:20,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:54:20,090 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 16 treesize of output 18 [2023-08-27 01:54:20,211 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 01:54:20,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:54:20,735 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:54:20,736 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 149 treesize of output 94 [2023-08-27 01:54:20,777 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 01:54:20,778 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 416 treesize of output 394 [2023-08-27 01:54:20,795 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:54:20,816 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:54:20,816 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 129 treesize of output 140 [2023-08-27 01:54:20,835 INFO L322 Elim1Store]: treesize reduction 9, result has 52.6 percent of original size [2023-08-27 01:54:20,835 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 83 [2023-08-27 01:54:21,829 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 01:54:21,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064507178] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:54:21,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:54:21,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 25 [2023-08-27 01:54:21,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606178146] [2023-08-27 01:54:21,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:54:21,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 01:54:21,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:54:21,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 01:54:21,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=592, Unknown=2, NotChecked=0, Total=702 [2023-08-27 01:54:21,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 297 [2023-08-27 01:54:21,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 196 transitions, 2805 flow. Second operand has 27 states, 27 states have (on average 76.33333333333333) internal successors, (2061), 27 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:54:21,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:54:21,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 297 [2023-08-27 01:54:21,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:54:24,445 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 01:54:26,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:54:28,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:54:30,823 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:54:32,834 WARN L539 Checker$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 01:54:54,364 WARN L234 SmtUtils]: Spent 20.51s on a formula simplification. DAG size of input: 119 DAG size of output: 112 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:54:57,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:54:59,040 WARN L539 Checker$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 01:55:01,197 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:55:03,436 WARN L539 Checker$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 01:55:05,479 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:55:08,209 WARN L539 Checker$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 01:55:10,232 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:55:12,245 WARN L539 Checker$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 01:55:14,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:55:16,271 WARN L539 Checker$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 01:55:18,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:55:20,360 WARN L539 Checker$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 01:55:22,382 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:55:24,404 WARN L539 Checker$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 01:55:26,596 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:55:28,619 WARN L539 Checker$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 01:55:30,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:55:32,666 WARN L539 Checker$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 01:55:33,402 INFO L124 PetriNetUnfolderBase]: 714/1321 cut-off events. [2023-08-27 01:55:33,403 INFO L125 PetriNetUnfolderBase]: For 16780/16785 co-relation queries the response was YES. [2023-08-27 01:55:33,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10292 conditions, 1321 events. 714/1321 cut-off events. For 16780/16785 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6969 event pairs, 149 based on Foata normal form. 59/1299 useless extension candidates. Maximal degree in co-relation 10246. Up to 698 conditions per place. [2023-08-27 01:55:33,411 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 189 selfloop transitions, 95 changer transitions 2/287 dead transitions. [2023-08-27 01:55:33,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 287 transitions, 3935 flow [2023-08-27 01:55:33,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 01:55:33,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 01:55:33,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2669 transitions. [2023-08-27 01:55:33,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2723191511070299 [2023-08-27 01:55:33,416 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2669 transitions. [2023-08-27 01:55:33,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2669 transitions. [2023-08-27 01:55:33,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:55:33,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2669 transitions. [2023-08-27 01:55:33,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 80.87878787878788) internal successors, (2669), 33 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:33,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 297.0) internal successors, (10098), 34 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:33,428 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 297.0) internal successors, (10098), 34 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:33,428 INFO L175 Difference]: Start difference. First operand has 126 places, 196 transitions, 2805 flow. Second operand 33 states and 2669 transitions. [2023-08-27 01:55:33,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 287 transitions, 3935 flow [2023-08-27 01:55:33,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 287 transitions, 3321 flow, removed 293 selfloop flow, removed 10 redundant places. [2023-08-27 01:55:33,503 INFO L231 Difference]: Finished difference. Result has 157 places, 181 transitions, 2588 flow [2023-08-27 01:55:33,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=2588, PETRI_PLACES=157, PETRI_TRANSITIONS=181} [2023-08-27 01:55:33,503 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 124 predicate places. [2023-08-27 01:55:33,504 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 181 transitions, 2588 flow [2023-08-27 01:55:33,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 76.33333333333333) internal successors, (2061), 27 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:33,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:55:33,504 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:55:33,513 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 01:55:33,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:33,710 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:55:33,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:55:33,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1762720397, now seen corresponding path program 2 times [2023-08-27 01:55:33,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:55:33,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395830970] [2023-08-27 01:55:33,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:55:33,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:55:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:34,024 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 01:55:34,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:55:34,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395830970] [2023-08-27 01:55:34,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395830970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:55:34,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994447683] [2023-08-27 01:55:34,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:55:34,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:34,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:55:34,026 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 01:55:34,029 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 01:55:34,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:55:34,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:55:34,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 01:55:34,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:55:34,210 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 01:55:34,250 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 01:55:34,319 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 01:55:34,418 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 01:55:34,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:55:34,727 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:55:34,728 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 64 treesize of output 52 [2023-08-27 01:55:34,738 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 01:55:34,739 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 156 treesize of output 141 [2023-08-27 01:55:34,748 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 01:55:34,748 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 138 treesize of output 110 [2023-08-27 01:55:34,757 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 01:55:34,758 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 71 [2023-08-27 01:55:34,857 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 01:55:34,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994447683] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:55:34,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:55:34,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-27 01:55:34,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312564237] [2023-08-27 01:55:34,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:55:34,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 01:55:34,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:55:34,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 01:55:34,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=478, Unknown=5, NotChecked=0, Total=600 [2023-08-27 01:55:34,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 01:55:34,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 181 transitions, 2588 flow. Second operand has 25 states, 25 states have (on average 85.32) internal successors, (2133), 25 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:34,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:55:34,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 01:55:34,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:55:37,188 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:55:39,367 WARN L539 Checker$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 01:55:40,111 INFO L124 PetriNetUnfolderBase]: 700/1215 cut-off events. [2023-08-27 01:55:40,111 INFO L125 PetriNetUnfolderBase]: For 18568/18584 co-relation queries the response was YES. [2023-08-27 01:55:40,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9594 conditions, 1215 events. 700/1215 cut-off events. For 18568/18584 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5856 event pairs, 54 based on Foata normal form. 56/1223 useless extension candidates. Maximal degree in co-relation 9538. Up to 715 conditions per place. [2023-08-27 01:55:40,120 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 155 selfloop transitions, 95 changer transitions 8/261 dead transitions. [2023-08-27 01:55:40,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 261 transitions, 3915 flow [2023-08-27 01:55:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 01:55:40,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 01:55:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2140 transitions. [2023-08-27 01:55:40,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3002244668911336 [2023-08-27 01:55:40,123 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2140 transitions. [2023-08-27 01:55:40,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2140 transitions. [2023-08-27 01:55:40,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:55:40,124 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2140 transitions. [2023-08-27 01:55:40,127 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 89.16666666666667) internal successors, (2140), 24 states have internal predecessors, (2140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:40,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 297.0) internal successors, (7425), 25 states have internal predecessors, (7425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:40,133 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 297.0) internal successors, (7425), 25 states have internal predecessors, (7425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:40,133 INFO L175 Difference]: Start difference. First operand has 157 places, 181 transitions, 2588 flow. Second operand 24 states and 2140 transitions. [2023-08-27 01:55:40,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 261 transitions, 3915 flow [2023-08-27 01:55:40,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 261 transitions, 3537 flow, removed 159 selfloop flow, removed 17 redundant places. [2023-08-27 01:55:40,206 INFO L231 Difference]: Finished difference. Result has 157 places, 189 transitions, 2865 flow [2023-08-27 01:55:40,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1723, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2865, PETRI_PLACES=157, PETRI_TRANSITIONS=189} [2023-08-27 01:55:40,207 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 124 predicate places. [2023-08-27 01:55:40,207 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 189 transitions, 2865 flow [2023-08-27 01:55:40,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 85.32) internal successors, (2133), 25 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:40,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:55:40,207 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:55:40,223 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 01:55:40,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:40,414 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:55:40,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:55:40,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1198946957, now seen corresponding path program 3 times [2023-08-27 01:55:40,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:55:40,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943457076] [2023-08-27 01:55:40,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:55:40,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:55:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:41,060 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 01:55:41,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:55:41,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943457076] [2023-08-27 01:55:41,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943457076] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:55:41,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148977606] [2023-08-27 01:55:41,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:55:41,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:41,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:55:41,065 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 01:55:41,093 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 01:55:41,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:55:41,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:55:41,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-27 01:55:41,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:55:41,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:55:41,317 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 19 treesize of output 21 [2023-08-27 01:55:41,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:55:41,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:55:41,420 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_796 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_796) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 1))) is different from false [2023-08-27 01:55:41,428 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:55:41,429 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2023-08-27 01:55:41,432 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2023-08-27 01:55:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:55:41,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148977606] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:55:41,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:55:41,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 6] total 21 [2023-08-27 01:55:41,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608295785] [2023-08-27 01:55:41,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:55:41,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 01:55:41,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:55:41,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 01:55:41,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=399, Unknown=1, NotChecked=40, Total=506 [2023-08-27 01:55:41,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 01:55:41,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 189 transitions, 2865 flow. Second operand has 23 states, 23 states have (on average 88.3913043478261) internal successors, (2033), 23 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:41,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:55:41,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 01:55:41,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:55:42,727 INFO L124 PetriNetUnfolderBase]: 839/1455 cut-off events. [2023-08-27 01:55:42,727 INFO L125 PetriNetUnfolderBase]: For 28039/28055 co-relation queries the response was YES. [2023-08-27 01:55:42,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12067 conditions, 1455 events. 839/1455 cut-off events. For 28039/28055 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 7248 event pairs, 16 based on Foata normal form. 82/1485 useless extension candidates. Maximal degree in co-relation 12011. Up to 635 conditions per place. [2023-08-27 01:55:42,740 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 163 selfloop transitions, 126 changer transitions 0/292 dead transitions. [2023-08-27 01:55:42,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 292 transitions, 4384 flow [2023-08-27 01:55:42,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 01:55:42,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 01:55:42,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2061 transitions. [2023-08-27 01:55:42,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3154269972451791 [2023-08-27 01:55:42,744 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2061 transitions. [2023-08-27 01:55:42,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2061 transitions. [2023-08-27 01:55:42,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:55:42,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2061 transitions. [2023-08-27 01:55:42,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 93.68181818181819) internal successors, (2061), 22 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:42,751 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 297.0) internal successors, (6831), 23 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:42,752 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 297.0) internal successors, (6831), 23 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:42,752 INFO L175 Difference]: Start difference. First operand has 157 places, 189 transitions, 2865 flow. Second operand 22 states and 2061 transitions. [2023-08-27 01:55:42,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 292 transitions, 4384 flow [2023-08-27 01:55:42,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 292 transitions, 3964 flow, removed 185 selfloop flow, removed 13 redundant places. [2023-08-27 01:55:42,835 INFO L231 Difference]: Finished difference. Result has 162 places, 205 transitions, 3124 flow [2023-08-27 01:55:42,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=2209, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3124, PETRI_PLACES=162, PETRI_TRANSITIONS=205} [2023-08-27 01:55:42,836 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 129 predicate places. [2023-08-27 01:55:42,836 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 205 transitions, 3124 flow [2023-08-27 01:55:42,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 88.3913043478261) internal successors, (2033), 23 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:42,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:55:42,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:55:42,845 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 01:55:43,042 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,SelfDestructingSolverStorable26 [2023-08-27 01:55:43,042 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:55:43,043 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:55:43,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1485238467, now seen corresponding path program 1 times [2023-08-27 01:55:43,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:55:43,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611147909] [2023-08-27 01:55:43,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:55:43,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:55:43,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:43,609 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 01:55:43,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:55:43,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611147909] [2023-08-27 01:55:43,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611147909] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:55:43,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081408585] [2023-08-27 01:55:43,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:55:43,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:43,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:55:43,611 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 01:55:43,612 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 01:55:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:43,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 01:55:43,704 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:55:43,759 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 01:55:43,819 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 21 treesize of output 20 [2023-08-27 01:55:43,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:55:43,866 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 16 treesize of output 18 [2023-08-27 01:55:43,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:55:44,000 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 27 treesize of output 27 [2023-08-27 01:55:44,084 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 01:55:44,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:55:44,149 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_836 (Array Int Int))) (< 0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_836) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse0 (+ .cse1 c_~q~0.offset)) 2147483649 (select .cse0 (+ .cse1 c_~q~0.offset 4)))))) is different from false [2023-08-27 01:55:44,425 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:55:44,425 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 113 treesize of output 78 [2023-08-27 01:55:44,449 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:55:44,450 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 285 treesize of output 280 [2023-08-27 01:55:44,466 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:55:44,466 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 66 [2023-08-27 01:55:45,088 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:55:45,089 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 50 treesize of output 24 [2023-08-27 01:55:45,222 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 01:55:45,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081408585] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:55:45,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:55:45,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-27 01:55:45,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764602428] [2023-08-27 01:55:45,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:55:45,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 01:55:45,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:55:45,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 01:55:45,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=510, Unknown=2, NotChecked=46, Total=650 [2023-08-27 01:55:45,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 01:55:45,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 205 transitions, 3124 flow. Second operand has 26 states, 26 states have (on average 85.26923076923077) internal successors, (2217), 26 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:45,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:55:45,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 01:55:45,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:55:46,248 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| c_~q~0.base)) (.cse2 (* 4 c_~q_back~0)) (.cse0 (forall ((v_ArrVal_836 (Array Int Int))) (< 0 (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_836) c_~q~0.base)) (.cse5 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse4 (+ .cse5 c_~q~0.offset)) 2147483649 (select .cse4 (+ .cse5 c_~q~0.offset 4))))))) (.cse3 (< c_~q_back~0 0))) (and .cse0 (or .cse0 (not (= (select .cse1 (+ c_~q~0.offset .cse2 4)) 0)) .cse3 (<= c_~n~0 (+ c_~q_back~0 1))) (or (not (= (select .cse1 (+ c_~q~0.offset .cse2)) 0)) .cse0 .cse3 (<= c_~n~0 c_~q_back~0)))) is different from false [2023-08-27 01:55:47,478 INFO L124 PetriNetUnfolderBase]: 804/1393 cut-off events. [2023-08-27 01:55:47,478 INFO L125 PetriNetUnfolderBase]: For 23850/23856 co-relation queries the response was YES. [2023-08-27 01:55:47,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11597 conditions, 1393 events. 804/1393 cut-off events. For 23850/23856 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6947 event pairs, 230 based on Foata normal form. 24/1373 useless extension candidates. Maximal degree in co-relation 11542. Up to 1147 conditions per place. [2023-08-27 01:55:47,488 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 195 selfloop transitions, 51 changer transitions 1/250 dead transitions. [2023-08-27 01:55:47,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 250 transitions, 3795 flow [2023-08-27 01:55:47,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 01:55:47,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 01:55:47,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2042 transitions. [2023-08-27 01:55:47,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2989313424096033 [2023-08-27 01:55:47,491 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2042 transitions. [2023-08-27 01:55:47,491 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2042 transitions. [2023-08-27 01:55:47,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:55:47,492 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2042 transitions. [2023-08-27 01:55:47,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 88.78260869565217) internal successors, (2042), 23 states have internal predecessors, (2042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:47,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 297.0) internal successors, (7128), 24 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:47,499 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 297.0) internal successors, (7128), 24 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:47,499 INFO L175 Difference]: Start difference. First operand has 162 places, 205 transitions, 3124 flow. Second operand 23 states and 2042 transitions. [2023-08-27 01:55:47,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 250 transitions, 3795 flow [2023-08-27 01:55:47,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 250 transitions, 3010 flow, removed 271 selfloop flow, removed 21 redundant places. [2023-08-27 01:55:47,577 INFO L231 Difference]: Finished difference. Result has 166 places, 202 transitions, 2512 flow [2023-08-27 01:55:47,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=2290, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2512, PETRI_PLACES=166, PETRI_TRANSITIONS=202} [2023-08-27 01:55:47,578 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 133 predicate places. [2023-08-27 01:55:47,578 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 202 transitions, 2512 flow [2023-08-27 01:55:47,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 85.26923076923077) internal successors, (2217), 26 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:47,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:55:47,579 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:55:47,585 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 01:55:47,784 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,SelfDestructingSolverStorable27 [2023-08-27 01:55:47,785 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:55:47,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:55:47,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1304297644, now seen corresponding path program 4 times [2023-08-27 01:55:47,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:55:47,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868153438] [2023-08-27 01:55:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:55:47,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:55:47,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:48,667 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 01:55:48,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:55:48,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868153438] [2023-08-27 01:55:48,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868153438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:55:48,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529164967] [2023-08-27 01:55:48,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:55:48,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:48,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:55:48,670 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:55:48,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-27 01:55:48,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:55:48,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:55:48,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 01:55:48,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:55:48,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:55:48,943 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 30 treesize of output 30 [2023-08-27 01:55:49,019 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 01:55:49,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:55:49,071 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_875 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_875) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset)))) 2147483648)) is different from false [2023-08-27 01:55:49,125 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:55:49,126 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 77 treesize of output 79 [2023-08-27 01:55:49,131 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:55:49,131 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 19 treesize of output 6 [2023-08-27 01:55:49,221 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 01:55:49,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529164967] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:55:49,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:55:49,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 6] total 24 [2023-08-27 01:55:49,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960674074] [2023-08-27 01:55:49,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:55:49,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 01:55:49,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:55:49,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 01:55:49,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=523, Unknown=1, NotChecked=46, Total=650 [2023-08-27 01:55:49,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 297 [2023-08-27 01:55:49,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 202 transitions, 2512 flow. Second operand has 26 states, 26 states have (on average 79.42307692307692) internal successors, (2065), 26 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:49,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:55:49,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 297 [2023-08-27 01:55:49,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:55:52,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:55:54,170 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 01:55:54,387 INFO L124 PetriNetUnfolderBase]: 1070/1830 cut-off events. [2023-08-27 01:55:54,388 INFO L125 PetriNetUnfolderBase]: For 18865/18867 co-relation queries the response was YES. [2023-08-27 01:55:54,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12798 conditions, 1830 events. 1070/1830 cut-off events. For 18865/18867 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9502 event pairs, 51 based on Foata normal form. 101/1857 useless extension candidates. Maximal degree in co-relation 12746. Up to 893 conditions per place. [2023-08-27 01:55:54,400 INFO L140 encePairwiseOnDemand]: 286/297 looper letters, 205 selfloop transitions, 144 changer transitions 0/350 dead transitions. [2023-08-27 01:55:54,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 350 transitions, 5210 flow [2023-08-27 01:55:54,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 01:55:54,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 01:55:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1598 transitions. [2023-08-27 01:55:54,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2831827042353358 [2023-08-27 01:55:54,403 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1598 transitions. [2023-08-27 01:55:54,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1598 transitions. [2023-08-27 01:55:54,403 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:55:54,403 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1598 transitions. [2023-08-27 01:55:54,405 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 84.10526315789474) internal successors, (1598), 19 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:54,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 297.0) internal successors, (5940), 20 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:54,409 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 297.0) internal successors, (5940), 20 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:54,409 INFO L175 Difference]: Start difference. First operand has 166 places, 202 transitions, 2512 flow. Second operand 19 states and 1598 transitions. [2023-08-27 01:55:54,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 350 transitions, 5210 flow [2023-08-27 01:55:54,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 350 transitions, 4961 flow, removed 73 selfloop flow, removed 19 redundant places. [2023-08-27 01:55:54,449 INFO L231 Difference]: Finished difference. Result has 170 places, 248 transitions, 3489 flow [2023-08-27 01:55:54,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=2269, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=3489, PETRI_PLACES=170, PETRI_TRANSITIONS=248} [2023-08-27 01:55:54,450 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 137 predicate places. [2023-08-27 01:55:54,450 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 248 transitions, 3489 flow [2023-08-27 01:55:54,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 79.42307692307692) internal successors, (2065), 26 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:54,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:55:54,451 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:55:54,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-27 01:55:54,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 01:55:54,652 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:55:54,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:55:54,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1485681576, now seen corresponding path program 4 times [2023-08-27 01:55:54,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:55:54,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257775974] [2023-08-27 01:55:54,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:55:54,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:55:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:54,734 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:55:54,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:55:54,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257775974] [2023-08-27 01:55:54,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257775974] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:55:54,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816548646] [2023-08-27 01:55:54,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:55:54,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:54,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:55:54,736 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:55:54,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-27 01:55:54,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:55:54,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:55:54,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 01:55:54,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:55:54,874 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:55:54,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:55:54,956 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:55:54,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816548646] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:55:54,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:55:54,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 5] total 9 [2023-08-27 01:55:54,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327060479] [2023-08-27 01:55:54,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:55:54,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 01:55:54,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:55:54,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 01:55:54,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-08-27 01:55:54,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 297 [2023-08-27 01:55:54,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 248 transitions, 3489 flow. Second operand has 11 states, 11 states have (on average 122.18181818181819) internal successors, (1344), 11 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:54,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:55:54,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 297 [2023-08-27 01:55:54,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:55:55,327 INFO L124 PetriNetUnfolderBase]: 1266/2159 cut-off events. [2023-08-27 01:55:55,327 INFO L125 PetriNetUnfolderBase]: For 25198/25204 co-relation queries the response was YES. [2023-08-27 01:55:55,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16993 conditions, 2159 events. 1266/2159 cut-off events. For 25198/25204 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 11600 event pairs, 97 based on Foata normal form. 52/2135 useless extension candidates. Maximal degree in co-relation 16937. Up to 1055 conditions per place. [2023-08-27 01:55:55,342 INFO L140 encePairwiseOnDemand]: 290/297 looper letters, 127 selfloop transitions, 186 changer transitions 12/328 dead transitions. [2023-08-27 01:55:55,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 328 transitions, 5302 flow [2023-08-27 01:55:55,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:55:55,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:55:55,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 656 transitions. [2023-08-27 01:55:55,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417508417508417 [2023-08-27 01:55:55,343 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 656 transitions. [2023-08-27 01:55:55,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 656 transitions. [2023-08-27 01:55:55,344 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:55:55,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 656 transitions. [2023-08-27 01:55:55,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:55,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 297.0) internal successors, (1782), 6 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:55,346 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 297.0) internal successors, (1782), 6 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:55,346 INFO L175 Difference]: Start difference. First operand has 170 places, 248 transitions, 3489 flow. Second operand 5 states and 656 transitions. [2023-08-27 01:55:55,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 328 transitions, 5302 flow [2023-08-27 01:55:55,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 328 transitions, 4747 flow, removed 173 selfloop flow, removed 14 redundant places. [2023-08-27 01:55:55,409 INFO L231 Difference]: Finished difference. Result has 158 places, 295 transitions, 4599 flow [2023-08-27 01:55:55,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=2936, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4599, PETRI_PLACES=158, PETRI_TRANSITIONS=295} [2023-08-27 01:55:55,410 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 125 predicate places. [2023-08-27 01:55:55,410 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 295 transitions, 4599 flow [2023-08-27 01:55:55,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 122.18181818181819) internal successors, (1344), 11 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:55,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:55:55,410 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:55:55,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-27 01:55:55,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:55,611 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:55:55,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:55:55,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1309175856, now seen corresponding path program 1 times [2023-08-27 01:55:55,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:55:55,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335544495] [2023-08-27 01:55:55,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:55:55,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:55:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:56,823 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 01:55:56,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:55:56,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335544495] [2023-08-27 01:55:56,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335544495] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:55:56,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142374477] [2023-08-27 01:55:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:55:56,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:56,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:55:56,825 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:55:56,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-27 01:55:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:56,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 01:55:56,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:55:57,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:55:57,097 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 19 treesize of output 21 [2023-08-27 01:55:57,148 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 01:55:57,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:55:57,250 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:55:57,250 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 44 treesize of output 37 [2023-08-27 01:55:57,253 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-27 01:55:57,372 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 01:55:57,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142374477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:55:57,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:55:57,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 25 [2023-08-27 01:55:57,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708859317] [2023-08-27 01:55:57,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:55:57,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 01:55:57,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:55:57,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 01:55:57,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=619, Unknown=10, NotChecked=0, Total=702 [2023-08-27 01:55:57,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 01:55:57,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 295 transitions, 4599 flow. Second operand has 27 states, 27 states have (on average 85.33333333333333) internal successors, (2304), 27 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:57,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:55:57,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 01:55:57,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:55:58,835 INFO L124 PetriNetUnfolderBase]: 1273/2202 cut-off events. [2023-08-27 01:55:58,835 INFO L125 PetriNetUnfolderBase]: For 25575/25581 co-relation queries the response was YES. [2023-08-27 01:55:58,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18381 conditions, 2202 events. 1273/2202 cut-off events. For 25575/25581 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 12113 event pairs, 108 based on Foata normal form. 16/2148 useless extension candidates. Maximal degree in co-relation 18331. Up to 1549 conditions per place. [2023-08-27 01:55:58,850 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 215 selfloop transitions, 128 changer transitions 0/346 dead transitions. [2023-08-27 01:55:58,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 346 transitions, 5605 flow [2023-08-27 01:55:58,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 01:55:58,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 01:55:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1443 transitions. [2023-08-27 01:55:58,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3036616161616162 [2023-08-27 01:55:58,853 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1443 transitions. [2023-08-27 01:55:58,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1443 transitions. [2023-08-27 01:55:58,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:55:58,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1443 transitions. [2023-08-27 01:55:58,855 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 90.1875) internal successors, (1443), 16 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:58,858 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 297.0) internal successors, (5049), 17 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:58,858 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 297.0) internal successors, (5049), 17 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:58,859 INFO L175 Difference]: Start difference. First operand has 158 places, 295 transitions, 4599 flow. Second operand 16 states and 1443 transitions. [2023-08-27 01:55:58,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 346 transitions, 5605 flow [2023-08-27 01:55:58,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 346 transitions, 4961 flow, removed 314 selfloop flow, removed 6 redundant places. [2023-08-27 01:55:58,968 INFO L231 Difference]: Finished difference. Result has 164 places, 307 transitions, 4450 flow [2023-08-27 01:55:58,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=3955, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4450, PETRI_PLACES=164, PETRI_TRANSITIONS=307} [2023-08-27 01:55:58,968 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 131 predicate places. [2023-08-27 01:55:58,968 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 307 transitions, 4450 flow [2023-08-27 01:55:58,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 85.33333333333333) internal successors, (2304), 27 states have internal predecessors, (2304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:58,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:55:58,969 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:55:58,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-27 01:55:59,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:59,174 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:55:59,175 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:55:59,175 INFO L85 PathProgramCache]: Analyzing trace with hash 576668647, now seen corresponding path program 2 times [2023-08-27 01:55:59,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:55:59,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953005726] [2023-08-27 01:55:59,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:55:59,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:55:59,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:55:59,622 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 01:55:59,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:55:59,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953005726] [2023-08-27 01:55:59,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953005726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:55:59,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657428785] [2023-08-27 01:55:59,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:55:59,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:55:59,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:55:59,624 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:55:59,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-27 01:55:59,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:55:59,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:55:59,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 01:55:59,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:55:59,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:55:59,824 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:55:59,846 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:55:59,846 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-27 01:55:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:55:59,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657428785] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:55:59,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:55:59,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 15 [2023-08-27 01:55:59,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111906756] [2023-08-27 01:55:59,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:55:59,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 01:55:59,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:55:59,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 01:55:59,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-08-27 01:55:59,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 297 [2023-08-27 01:55:59,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 307 transitions, 4450 flow. Second operand has 17 states, 17 states have (on average 92.58823529411765) internal successors, (1574), 17 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:55:59,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:55:59,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 297 [2023-08-27 01:55:59,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:56:00,623 INFO L124 PetriNetUnfolderBase]: 1192/2117 cut-off events. [2023-08-27 01:56:00,623 INFO L125 PetriNetUnfolderBase]: For 17771/17777 co-relation queries the response was YES. [2023-08-27 01:56:00,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14886 conditions, 2117 events. 1192/2117 cut-off events. For 17771/17777 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12147 event pairs, 41 based on Foata normal form. 34/2057 useless extension candidates. Maximal degree in co-relation 14837. Up to 1388 conditions per place. [2023-08-27 01:56:00,634 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 200 selfloop transitions, 169 changer transitions 0/372 dead transitions. [2023-08-27 01:56:00,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 372 transitions, 5632 flow [2023-08-27 01:56:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 01:56:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 01:56:00,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1654 transitions. [2023-08-27 01:56:00,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32758962170726874 [2023-08-27 01:56:00,636 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1654 transitions. [2023-08-27 01:56:00,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1654 transitions. [2023-08-27 01:56:00,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:56:00,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1654 transitions. [2023-08-27 01:56:00,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 97.29411764705883) internal successors, (1654), 17 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:00,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 297.0) internal successors, (5346), 18 states have internal predecessors, (5346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:00,642 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 297.0) internal successors, (5346), 18 states have internal predecessors, (5346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:00,642 INFO L175 Difference]: Start difference. First operand has 164 places, 307 transitions, 4450 flow. Second operand 17 states and 1654 transitions. [2023-08-27 01:56:00,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 372 transitions, 5632 flow [2023-08-27 01:56:00,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 372 transitions, 5534 flow, removed 16 selfloop flow, removed 6 redundant places. [2023-08-27 01:56:00,695 INFO L231 Difference]: Finished difference. Result has 174 places, 315 transitions, 4800 flow [2023-08-27 01:56:00,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=4207, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4800, PETRI_PLACES=174, PETRI_TRANSITIONS=315} [2023-08-27 01:56:00,696 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 141 predicate places. [2023-08-27 01:56:00,696 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 315 transitions, 4800 flow [2023-08-27 01:56:00,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 92.58823529411765) internal successors, (1574), 17 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:00,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:56:00,697 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:56:00,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-27 01:56:00,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-27 01:56:00,901 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:56:00,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:56:00,901 INFO L85 PathProgramCache]: Analyzing trace with hash 603466524, now seen corresponding path program 3 times [2023-08-27 01:56:00,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:56:00,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377352708] [2023-08-27 01:56:00,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:56:00,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:56:00,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:56:01,767 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 01:56:01,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:56:01,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377352708] [2023-08-27 01:56:01,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377352708] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:56:01,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428842405] [2023-08-27 01:56:01,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:56:01,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:56:01,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:56:01,769 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:56:01,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-27 01:56:01,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 01:56:01,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:56:01,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 01:56:01,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:56:02,069 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 01:56:02,101 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 01:56:02,130 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 01:56:02,331 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 01:56:02,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:56:02,840 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:56:02,840 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 01:56:02,850 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 01:56:02,850 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 324 treesize of output 295 [2023-08-27 01:56:02,857 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:56:02,858 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 84 [2023-08-27 01:56:02,878 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-27 01:56:02,878 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 97 treesize of output 71 [2023-08-27 01:56:03,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:56:03,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428842405] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:56:03,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:56:03,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-27 01:56:03,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046869776] [2023-08-27 01:56:03,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:56:03,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 01:56:03,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:56:03,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 01:56:03,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=950, Unknown=1, NotChecked=0, Total=1190 [2023-08-27 01:56:03,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 01:56:03,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 315 transitions, 4800 flow. Second operand has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:03,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:56:03,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 01:56:03,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:56:07,852 INFO L124 PetriNetUnfolderBase]: 1995/3704 cut-off events. [2023-08-27 01:56:07,852 INFO L125 PetriNetUnfolderBase]: For 29699/29705 co-relation queries the response was YES. [2023-08-27 01:56:07,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25690 conditions, 3704 events. 1995/3704 cut-off events. For 29699/29705 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 24985 event pairs, 293 based on Foata normal form. 178/3600 useless extension candidates. Maximal degree in co-relation 25640. Up to 1514 conditions per place. [2023-08-27 01:56:07,875 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 519 selfloop transitions, 233 changer transitions 5/760 dead transitions. [2023-08-27 01:56:07,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 760 transitions, 10800 flow [2023-08-27 01:56:07,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-27 01:56:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-27 01:56:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 5150 transitions. [2023-08-27 01:56:07,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3042117077204797 [2023-08-27 01:56:07,880 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 5150 transitions. [2023-08-27 01:56:07,880 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 5150 transitions. [2023-08-27 01:56:07,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:56:07,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 5150 transitions. [2023-08-27 01:56:07,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 90.35087719298245) internal successors, (5150), 57 states have internal predecessors, (5150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:07,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 297.0) internal successors, (17226), 58 states have internal predecessors, (17226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:07,946 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 297.0) internal successors, (17226), 58 states have internal predecessors, (17226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:07,946 INFO L175 Difference]: Start difference. First operand has 174 places, 315 transitions, 4800 flow. Second operand 57 states and 5150 transitions. [2023-08-27 01:56:07,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 760 transitions, 10800 flow [2023-08-27 01:56:08,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 760 transitions, 10571 flow, removed 45 selfloop flow, removed 8 redundant places. [2023-08-27 01:56:08,063 INFO L231 Difference]: Finished difference. Result has 248 places, 495 transitions, 8248 flow [2023-08-27 01:56:08,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=4648, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=8248, PETRI_PLACES=248, PETRI_TRANSITIONS=495} [2023-08-27 01:56:08,063 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 215 predicate places. [2023-08-27 01:56:08,063 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 495 transitions, 8248 flow [2023-08-27 01:56:08,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:08,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:56:08,064 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:56:08,069 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-27 01:56:08,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-27 01:56:08,265 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:56:08,266 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:56:08,266 INFO L85 PathProgramCache]: Analyzing trace with hash 603466885, now seen corresponding path program 5 times [2023-08-27 01:56:08,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:56:08,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011747063] [2023-08-27 01:56:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:56:08,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:56:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:56:09,164 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 01:56:09,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:56:09,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011747063] [2023-08-27 01:56:09,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011747063] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:56:09,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730737662] [2023-08-27 01:56:09,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:56:09,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:56:09,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:56:09,166 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:56:09,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-27 01:56:09,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 01:56:09,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:56:09,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 01:56:09,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:56:09,482 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 01:56:09,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:56:09,661 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:56:09,661 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 72 treesize of output 104 [2023-08-27 01:56:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:56:09,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730737662] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:56:09,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:56:09,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 25 [2023-08-27 01:56:09,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454080899] [2023-08-27 01:56:09,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:56:09,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 01:56:09,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:56:09,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 01:56:09,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2023-08-27 01:56:09,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 01:56:09,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 495 transitions, 8248 flow. Second operand has 27 states, 27 states have (on average 85.48148148148148) internal successors, (2308), 27 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:09,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:56:09,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 01:56:09,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:56:12,712 INFO L124 PetriNetUnfolderBase]: 2766/4971 cut-off events. [2023-08-27 01:56:12,712 INFO L125 PetriNetUnfolderBase]: For 54043/54049 co-relation queries the response was YES. [2023-08-27 01:56:12,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38239 conditions, 4971 events. 2766/4971 cut-off events. For 54043/54049 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 34142 event pairs, 469 based on Foata normal form. 58/4637 useless extension candidates. Maximal degree in co-relation 38165. Up to 3488 conditions per place. [2023-08-27 01:56:12,753 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 494 selfloop transitions, 365 changer transitions 5/867 dead transitions. [2023-08-27 01:56:12,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 867 transitions, 15046 flow [2023-08-27 01:56:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-27 01:56:12,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-27 01:56:12,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 3860 transitions. [2023-08-27 01:56:12,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30224727899146503 [2023-08-27 01:56:12,757 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 3860 transitions. [2023-08-27 01:56:12,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 3860 transitions. [2023-08-27 01:56:12,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:56:12,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 3860 transitions. [2023-08-27 01:56:12,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 89.76744186046511) internal successors, (3860), 43 states have internal predecessors, (3860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:12,770 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 297.0) internal successors, (13068), 44 states have internal predecessors, (13068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:12,771 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 297.0) internal successors, (13068), 44 states have internal predecessors, (13068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:12,771 INFO L175 Difference]: Start difference. First operand has 248 places, 495 transitions, 8248 flow. Second operand 43 states and 3860 transitions. [2023-08-27 01:56:12,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 867 transitions, 15046 flow [2023-08-27 01:56:13,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 867 transitions, 13846 flow, removed 562 selfloop flow, removed 13 redundant places. [2023-08-27 01:56:13,215 INFO L231 Difference]: Finished difference. Result has 297 places, 729 transitions, 12583 flow [2023-08-27 01:56:13,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=7246, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=12583, PETRI_PLACES=297, PETRI_TRANSITIONS=729} [2023-08-27 01:56:13,215 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 264 predicate places. [2023-08-27 01:56:13,216 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 729 transitions, 12583 flow [2023-08-27 01:56:13,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 85.48148148148148) internal successors, (2308), 27 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:56:13,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:56:13,216 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:56:13,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-27 01:56:13,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:56:13,417 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:56:13,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:56:13,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1318105547, now seen corresponding path program 6 times [2023-08-27 01:56:13,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:56:13,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767932746] [2023-08-27 01:56:13,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:56:13,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:56:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:56:14,277 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 01:56:14,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:56:14,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767932746] [2023-08-27 01:56:14,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767932746] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:56:14,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521444335] [2023-08-27 01:56:14,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:56:14,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:56:14,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:56:14,278 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:56:14,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-27 01:56:14,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 01:56:14,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:56:14,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-27 01:56:14,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:56:14,437 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 01:56:14,468 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 01:56:14,502 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 01:56:14,577 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 01:56:14,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:56:14,664 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 18 treesize of output 20 [2023-08-27 01:56:14,959 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 01:56:14,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:56:16,124 INFO L322 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2023-08-27 01:56:16,124 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 3 case distinctions, treesize of input 258 treesize of output 152 [2023-08-27 01:56:16,367 INFO L322 Elim1Store]: treesize reduction 42, result has 81.7 percent of original size [2023-08-27 01:56:16,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 354 treesize of output 475 [2023-08-27 01:56:16,405 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:56:16,407 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:56:16,408 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:56:16,438 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:56:16,439 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 233 [2023-08-27 01:56:16,560 INFO L322 Elim1Store]: treesize reduction 42, result has 65.3 percent of original size [2023-08-27 01:56:16,561 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 176 treesize of output 217 [2023-08-27 01:58:08,481 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 01:58:08,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521444335] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:58:08,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:58:08,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-27 01:58:08,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028614739] [2023-08-27 01:58:08,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:58:08,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 01:58:08,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:58:08,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 01:58:08,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=990, Unknown=6, NotChecked=0, Total=1190 [2023-08-27 01:58:08,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 01:58:08,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 729 transitions, 12583 flow. Second operand has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:08,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:58:08,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 01:58:08,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:58:15,459 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 01:58:27,948 INFO L124 PetriNetUnfolderBase]: 2791/5107 cut-off events. [2023-08-27 01:58:27,949 INFO L125 PetriNetUnfolderBase]: For 65666/65672 co-relation queries the response was YES. [2023-08-27 01:58:27,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41132 conditions, 5107 events. 2791/5107 cut-off events. For 65666/65672 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 35640 event pairs, 458 based on Foata normal form. 100/4879 useless extension candidates. Maximal degree in co-relation 41038. Up to 2383 conditions per place. [2023-08-27 01:58:27,994 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 661 selfloop transitions, 275 changer transitions 2/941 dead transitions. [2023-08-27 01:58:27,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 941 transitions, 17159 flow [2023-08-27 01:58:27,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-27 01:58:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-27 01:58:27,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3150 transitions. [2023-08-27 01:58:27,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30303030303030304 [2023-08-27 01:58:27,997 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3150 transitions. [2023-08-27 01:58:27,997 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3150 transitions. [2023-08-27 01:58:27,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:58:27,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3150 transitions. [2023-08-27 01:58:28,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 90.0) internal successors, (3150), 35 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:28,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 297.0) internal successors, (10692), 36 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:28,006 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 297.0) internal successors, (10692), 36 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:28,007 INFO L175 Difference]: Start difference. First operand has 297 places, 729 transitions, 12583 flow. Second operand 35 states and 3150 transitions. [2023-08-27 01:58:28,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 941 transitions, 17159 flow [2023-08-27 01:58:28,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 941 transitions, 15815 flow, removed 627 selfloop flow, removed 17 redundant places. [2023-08-27 01:58:28,590 INFO L231 Difference]: Finished difference. Result has 320 places, 780 transitions, 13365 flow [2023-08-27 01:58:28,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=10742, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=13365, PETRI_PLACES=320, PETRI_TRANSITIONS=780} [2023-08-27 01:58:28,590 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 287 predicate places. [2023-08-27 01:58:28,591 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 780 transitions, 13365 flow [2023-08-27 01:58:28,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:28,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:58:28,591 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:58:28,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-27 01:58:28,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:58:28,791 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:58:28,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:58:28,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1309175805, now seen corresponding path program 4 times [2023-08-27 01:58:28,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:58:28,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134140135] [2023-08-27 01:58:28,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:58:28,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:58:28,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:58:29,467 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 01:58:29,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:58:29,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134140135] [2023-08-27 01:58:29,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134140135] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:58:29,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002261511] [2023-08-27 01:58:29,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:58:29,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:58:29,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:58:29,469 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:58:29,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-27 01:58:29,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:58:29,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:58:29,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 01:58:29,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:58:29,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:58:29,729 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 19 treesize of output 21 [2023-08-27 01:58:29,787 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 01:58:29,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:58:29,889 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:58:29,889 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2023-08-27 01:58:29,897 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2023-08-27 01:58:29,987 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 01:58:29,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002261511] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:58:29,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:58:29,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 25 [2023-08-27 01:58:29,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097380648] [2023-08-27 01:58:29,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:58:29,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 01:58:29,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:58:29,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 01:58:29,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=620, Unknown=2, NotChecked=0, Total=702 [2023-08-27 01:58:29,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 01:58:29,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 780 transitions, 13365 flow. Second operand has 27 states, 27 states have (on average 88.33333333333333) internal successors, (2385), 27 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:29,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:58:29,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 01:58:29,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:58:30,453 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset 4))) (and (< 0 (+ (select (select |c_#memory_int| c_~q~0.base) .cse0) 1)) (forall ((v_ArrVal_1159 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1159) c_~q~0.base) .cse0) 1))))) is different from false [2023-08-27 01:58:32,108 INFO L124 PetriNetUnfolderBase]: 3223/5816 cut-off events. [2023-08-27 01:58:32,108 INFO L125 PetriNetUnfolderBase]: For 81694/81700 co-relation queries the response was YES. [2023-08-27 01:58:32,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47473 conditions, 5816 events. 3223/5816 cut-off events. For 81694/81700 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 40984 event pairs, 198 based on Foata normal form. 0/5516 useless extension candidates. Maximal degree in co-relation 47373. Up to 4098 conditions per place. [2023-08-27 01:58:32,158 INFO L140 encePairwiseOnDemand]: 285/297 looper letters, 681 selfloop transitions, 323 changer transitions 0/1007 dead transitions. [2023-08-27 01:58:32,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1007 transitions, 18822 flow [2023-08-27 01:58:32,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 01:58:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 01:58:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1768 transitions. [2023-08-27 01:58:32,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31330852383483965 [2023-08-27 01:58:32,161 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1768 transitions. [2023-08-27 01:58:32,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1768 transitions. [2023-08-27 01:58:32,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:58:32,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1768 transitions. [2023-08-27 01:58:32,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 93.05263157894737) internal successors, (1768), 19 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:32,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 297.0) internal successors, (5940), 20 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:32,165 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 297.0) internal successors, (5940), 20 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:32,165 INFO L175 Difference]: Start difference. First operand has 320 places, 780 transitions, 13365 flow. Second operand 19 states and 1768 transitions. [2023-08-27 01:58:32,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1007 transitions, 18822 flow [2023-08-27 01:58:32,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 1007 transitions, 18204 flow, removed 230 selfloop flow, removed 15 redundant places. [2023-08-27 01:58:32,736 INFO L231 Difference]: Finished difference. Result has 326 places, 884 transitions, 15707 flow [2023-08-27 01:58:32,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=12886, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=778, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=15707, PETRI_PLACES=326, PETRI_TRANSITIONS=884} [2023-08-27 01:58:32,737 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 293 predicate places. [2023-08-27 01:58:32,737 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 884 transitions, 15707 flow [2023-08-27 01:58:32,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 88.33333333333333) internal successors, (2385), 27 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:32,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:58:32,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:58:32,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-27 01:58:32,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:58:32,938 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:58:32,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:58:32,938 INFO L85 PathProgramCache]: Analyzing trace with hash 270615977, now seen corresponding path program 1 times [2023-08-27 01:58:32,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:58:32,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138404612] [2023-08-27 01:58:32,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:58:32,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:58:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:58:33,058 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 01:58:33,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:58:33,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138404612] [2023-08-27 01:58:33,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138404612] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:58:33,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:58:33,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 01:58:33,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065681903] [2023-08-27 01:58:33,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:58:33,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 01:58:33,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:58:33,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 01:58:33,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-27 01:58:33,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 297 [2023-08-27 01:58:33,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 884 transitions, 15707 flow. Second operand has 7 states, 7 states have (on average 113.0) internal successors, (791), 7 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:33,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:58:33,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 297 [2023-08-27 01:58:33,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:58:34,705 INFO L124 PetriNetUnfolderBase]: 3237/5845 cut-off events. [2023-08-27 01:58:34,705 INFO L125 PetriNetUnfolderBase]: For 84095/84095 co-relation queries the response was YES. [2023-08-27 01:58:34,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49813 conditions, 5845 events. 3237/5845 cut-off events. For 84095/84095 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 41302 event pairs, 252 based on Foata normal form. 8/5530 useless extension candidates. Maximal degree in co-relation 49712. Up to 5115 conditions per place. [2023-08-27 01:58:34,757 INFO L140 encePairwiseOnDemand]: 290/297 looper letters, 801 selfloop transitions, 73 changer transitions 33/908 dead transitions. [2023-08-27 01:58:34,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 908 transitions, 17787 flow [2023-08-27 01:58:34,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:58:34,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:58:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 703 transitions. [2023-08-27 01:58:34,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945005611672278 [2023-08-27 01:58:34,758 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 703 transitions. [2023-08-27 01:58:34,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 703 transitions. [2023-08-27 01:58:34,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:58:34,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 703 transitions. [2023-08-27 01:58:34,759 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.16666666666667) internal successors, (703), 6 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:34,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:34,760 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:34,760 INFO L175 Difference]: Start difference. First operand has 326 places, 884 transitions, 15707 flow. Second operand 6 states and 703 transitions. [2023-08-27 01:58:34,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 908 transitions, 17787 flow [2023-08-27 01:58:35,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 908 transitions, 17356 flow, removed 52 selfloop flow, removed 13 redundant places. [2023-08-27 01:58:35,353 INFO L231 Difference]: Finished difference. Result has 319 places, 857 transitions, 14938 flow [2023-08-27 01:58:35,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=15276, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=884, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=14938, PETRI_PLACES=319, PETRI_TRANSITIONS=857} [2023-08-27 01:58:35,354 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 286 predicate places. [2023-08-27 01:58:35,354 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 857 transitions, 14938 flow [2023-08-27 01:58:35,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 113.0) internal successors, (791), 7 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:35,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:58:35,354 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:58:35,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2023-08-27 01:58:35,355 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:58:35,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:58:35,355 INFO L85 PathProgramCache]: Analyzing trace with hash -688385006, now seen corresponding path program 5 times [2023-08-27 01:58:35,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:58:35,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808524948] [2023-08-27 01:58:35,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:58:35,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:58:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:58:36,183 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 01:58:36,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:58:36,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808524948] [2023-08-27 01:58:36,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808524948] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:58:36,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60575885] [2023-08-27 01:58:36,184 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:58:36,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:58:36,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:58:36,185 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:58:36,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-27 01:58:36,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 01:58:36,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:58:36,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-27 01:58:36,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:58:36,405 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 01:58:36,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:58:36,452 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 16 treesize of output 18 [2023-08-27 01:58:36,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:58:36,660 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 36 treesize of output 34 [2023-08-27 01:58:36,811 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 01:58:36,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:58:36,905 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1216 (Array Int Int))) (< 0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1216) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ c_~s~0 2147483649 (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset 8)))))) is different from false [2023-08-27 01:58:37,160 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:58:37,161 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 144 treesize of output 96 [2023-08-27 01:58:37,211 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:58:37,211 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 385 treesize of output 410 [2023-08-27 01:58:37,246 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:58:37,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 101 treesize of output 124 [2023-08-27 01:58:40,012 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:58:40,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 26 [2023-08-27 01:58:40,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:58:40,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60575885] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:58:40,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:58:40,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-27 01:58:40,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488858569] [2023-08-27 01:58:40,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:58:40,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 01:58:40,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:58:40,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 01:58:40,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=978, Unknown=1, NotChecked=64, Total=1190 [2023-08-27 01:58:40,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 01:58:40,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 857 transitions, 14938 flow. Second operand has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:58:40,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:58:40,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 01:58:40,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:58:45,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:58:48,222 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:58:50,238 WARN L539 Checker$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 01:58:52,265 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:59:00,213 WARN L539 Checker$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 01:59:02,249 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 01:59:03,690 INFO L124 PetriNetUnfolderBase]: 3520/6198 cut-off events. [2023-08-27 01:59:03,690 INFO L125 PetriNetUnfolderBase]: For 106089/106089 co-relation queries the response was YES. [2023-08-27 01:59:03,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54423 conditions, 6198 events. 3520/6198 cut-off events. For 106089/106089 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 42327 event pairs, 484 based on Foata normal form. 216/6154 useless extension candidates. Maximal degree in co-relation 54323. Up to 3869 conditions per place. [2023-08-27 01:59:03,748 INFO L140 encePairwiseOnDemand]: 285/297 looper letters, 671 selfloop transitions, 566 changer transitions 7/1246 dead transitions. [2023-08-27 01:59:03,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1246 transitions, 23630 flow [2023-08-27 01:59:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-27 01:59:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-27 01:59:03,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4562 transitions. [2023-08-27 01:59:03,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3011817521621443 [2023-08-27 01:59:03,752 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4562 transitions. [2023-08-27 01:59:03,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4562 transitions. [2023-08-27 01:59:03,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:59:03,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4562 transitions. [2023-08-27 01:59:03,756 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 89.45098039215686) internal successors, (4562), 51 states have internal predecessors, (4562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:03,765 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 297.0) internal successors, (15444), 52 states have internal predecessors, (15444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:03,766 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 297.0) internal successors, (15444), 52 states have internal predecessors, (15444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:03,766 INFO L175 Difference]: Start difference. First operand has 319 places, 857 transitions, 14938 flow. Second operand 51 states and 4562 transitions. [2023-08-27 01:59:03,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1246 transitions, 23630 flow [2023-08-27 01:59:04,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 1246 transitions, 23022 flow, removed 124 selfloop flow, removed 8 redundant places. [2023-08-27 01:59:04,325 INFO L231 Difference]: Finished difference. Result has 365 places, 1088 transitions, 21308 flow [2023-08-27 01:59:04,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=13850, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=822, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=21308, PETRI_PLACES=365, PETRI_TRANSITIONS=1088} [2023-08-27 01:59:04,326 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 332 predicate places. [2023-08-27 01:59:04,326 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 1088 transitions, 21308 flow [2023-08-27 01:59:04,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:04,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:59:04,327 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:59:04,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-27 01:59:04,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-27 01:59:04,532 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:59:04,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:59:04,534 INFO L85 PathProgramCache]: Analyzing trace with hash -700399854, now seen corresponding path program 6 times [2023-08-27 01:59:04,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:59:04,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328203332] [2023-08-27 01:59:04,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:59:04,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:59:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:59:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:59:04,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:59:04,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328203332] [2023-08-27 01:59:04,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328203332] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:59:04,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446949379] [2023-08-27 01:59:04,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:59:04,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:59:04,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:59:04,867 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:59:04,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-27 01:59:04,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 01:59:04,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:59:04,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 01:59:04,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:59:05,240 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 01:59:05,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:59:05,280 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 01:59:05,281 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 27 treesize of output 15 [2023-08-27 01:59:05,539 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 01:59:05,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446949379] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:59:05,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:59:05,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 01:59:05,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723390018] [2023-08-27 01:59:05,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:59:05,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 01:59:05,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:59:05,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 01:59:05,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2023-08-27 01:59:05,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 297 [2023-08-27 01:59:05,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 1088 transitions, 21308 flow. Second operand has 32 states, 32 states have (on average 92.3125) internal successors, (2954), 32 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:05,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:59:05,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 297 [2023-08-27 01:59:05,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:59:08,726 INFO L124 PetriNetUnfolderBase]: 2808/5130 cut-off events. [2023-08-27 01:59:08,726 INFO L125 PetriNetUnfolderBase]: For 98329/98329 co-relation queries the response was YES. [2023-08-27 01:59:08,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47368 conditions, 5130 events. 2808/5130 cut-off events. For 98329/98329 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 36016 event pairs, 135 based on Foata normal form. 278/5211 useless extension candidates. Maximal degree in co-relation 47255. Up to 1528 conditions per place. [2023-08-27 01:59:08,779 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 366 selfloop transitions, 641 changer transitions 25/1034 dead transitions. [2023-08-27 01:59:08,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1034 transitions, 20047 flow [2023-08-27 01:59:08,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 01:59:08,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 01:59:08,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3650 transitions. [2023-08-27 01:59:08,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33215033215033213 [2023-08-27 01:59:08,784 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3650 transitions. [2023-08-27 01:59:08,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3650 transitions. [2023-08-27 01:59:08,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:59:08,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3650 transitions. [2023-08-27 01:59:08,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 98.64864864864865) internal successors, (3650), 37 states have internal predecessors, (3650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:08,794 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 297.0) internal successors, (11286), 38 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:08,794 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 297.0) internal successors, (11286), 38 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:08,794 INFO L175 Difference]: Start difference. First operand has 365 places, 1088 transitions, 21308 flow. Second operand 37 states and 3650 transitions. [2023-08-27 01:59:08,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1034 transitions, 20047 flow [2023-08-27 01:59:09,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1034 transitions, 18865 flow, removed 438 selfloop flow, removed 29 redundant places. [2023-08-27 01:59:09,598 INFO L231 Difference]: Finished difference. Result has 360 places, 857 transitions, 16778 flow [2023-08-27 01:59:09,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=14119, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=558, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=16778, PETRI_PLACES=360, PETRI_TRANSITIONS=857} [2023-08-27 01:59:09,599 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 327 predicate places. [2023-08-27 01:59:09,599 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 857 transitions, 16778 flow [2023-08-27 01:59:09,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 92.3125) internal successors, (2954), 32 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:09,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:59:09,600 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:59:09,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-27 01:59:09,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-27 01:59:09,811 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:59:09,812 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:59:09,812 INFO L85 PathProgramCache]: Analyzing trace with hash 97264883, now seen corresponding path program 7 times [2023-08-27 01:59:09,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:59:09,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770559892] [2023-08-27 01:59:09,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:59:09,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:59:09,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:59:10,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:59:10,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:59:10,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770559892] [2023-08-27 01:59:10,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770559892] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:59:10,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351821310] [2023-08-27 01:59:10,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:59:10,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:59:10,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:59:10,504 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:59:10,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-27 01:59:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:59:10,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-27 01:59:10,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:59:10,658 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 01:59:10,688 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 01:59:10,724 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 01:59:10,760 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 01:59:10,795 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 01:59:11,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:59:11,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:59:11,876 INFO L322 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2023-08-27 01:59:11,876 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 3 case distinctions, treesize of input 262 treesize of output 156 [2023-08-27 01:59:12,107 INFO L322 Elim1Store]: treesize reduction 24, result has 89.1 percent of original size [2023-08-27 01:59:12,108 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 398 treesize of output 528 [2023-08-27 01:59:12,216 INFO L322 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2023-08-27 01:59:12,216 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 310 treesize of output 318 [2023-08-27 01:59:12,335 INFO L322 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2023-08-27 01:59:12,336 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 205 treesize of output 251 [2023-08-27 01:59:31,881 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:59:31,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351821310] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:59:31,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:59:31,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-27 01:59:31,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924960350] [2023-08-27 01:59:31,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:59:31,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 01:59:31,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:59:31,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 01:59:31,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1000, Unknown=7, NotChecked=0, Total=1190 [2023-08-27 01:59:31,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 01:59:31,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 857 transitions, 16778 flow. Second operand has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:31,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:59:31,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 01:59:31,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:59:35,580 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 01:59:38,125 INFO L124 PetriNetUnfolderBase]: 2994/5560 cut-off events. [2023-08-27 01:59:38,126 INFO L125 PetriNetUnfolderBase]: For 87803/87803 co-relation queries the response was YES. [2023-08-27 01:59:38,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49784 conditions, 5560 events. 2994/5560 cut-off events. For 87803/87803 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 40427 event pairs, 624 based on Foata normal form. 30/5407 useless extension candidates. Maximal degree in co-relation 49676. Up to 3495 conditions per place. [2023-08-27 01:59:38,187 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 753 selfloop transitions, 293 changer transitions 3/1051 dead transitions. [2023-08-27 01:59:38,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1051 transitions, 21729 flow [2023-08-27 01:59:38,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-27 01:59:38,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-27 01:59:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2690 transitions. [2023-08-27 01:59:38,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30190796857463525 [2023-08-27 01:59:38,189 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2690 transitions. [2023-08-27 01:59:38,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2690 transitions. [2023-08-27 01:59:38,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:59:38,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2690 transitions. [2023-08-27 01:59:38,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 89.66666666666667) internal successors, (2690), 30 states have internal predecessors, (2690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:38,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 297.0) internal successors, (9207), 31 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:38,196 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 297.0) internal successors, (9207), 31 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:38,196 INFO L175 Difference]: Start difference. First operand has 360 places, 857 transitions, 16778 flow. Second operand 30 states and 2690 transitions. [2023-08-27 01:59:38,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1051 transitions, 21729 flow [2023-08-27 01:59:39,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1051 transitions, 18353 flow, removed 716 selfloop flow, removed 35 redundant places. [2023-08-27 01:59:39,058 INFO L231 Difference]: Finished difference. Result has 363 places, 974 transitions, 17104 flow [2023-08-27 01:59:39,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=13947, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=853, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=17104, PETRI_PLACES=363, PETRI_TRANSITIONS=974} [2023-08-27 01:59:39,059 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 330 predicate places. [2023-08-27 01:59:39,059 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 974 transitions, 17104 flow [2023-08-27 01:59:39,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:39,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:59:39,059 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:59:39,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-27 01:59:39,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-27 01:59:39,260 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:59:39,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:59:39,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1973722109, now seen corresponding path program 1 times [2023-08-27 01:59:39,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:59:39,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301276889] [2023-08-27 01:59:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:59:39,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:59:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:59:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:59:39,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:59:39,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301276889] [2023-08-27 01:59:39,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301276889] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:59:39,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436776606] [2023-08-27 01:59:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:59:39,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:59:39,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:59:39,843 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:59:39,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-27 01:59:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:59:39,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-27 01:59:39,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:59:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:59:40,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:59:40,612 INFO L322 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2023-08-27 01:59:40,612 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 70 treesize of output 104 [2023-08-27 01:59:41,021 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 01:59:41,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436776606] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:59:41,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:59:41,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 01:59:41,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889546863] [2023-08-27 01:59:41,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:59:41,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 01:59:41,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:59:41,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 01:59:41,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2023-08-27 01:59:41,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 297 [2023-08-27 01:59:41,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 974 transitions, 17104 flow. Second operand has 32 states, 32 states have (on average 92.40625) internal successors, (2957), 32 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:41,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:59:41,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 297 [2023-08-27 01:59:41,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:59:44,884 INFO L124 PetriNetUnfolderBase]: 2861/5344 cut-off events. [2023-08-27 01:59:44,885 INFO L125 PetriNetUnfolderBase]: For 67250/67250 co-relation queries the response was YES. [2023-08-27 01:59:44,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42930 conditions, 5344 events. 2861/5344 cut-off events. For 67250/67250 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 38983 event pairs, 670 based on Foata normal form. 84/5219 useless extension candidates. Maximal degree in co-relation 42830. Up to 3495 conditions per place. [2023-08-27 01:59:44,938 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 717 selfloop transitions, 306 changer transitions 1/1026 dead transitions. [2023-08-27 01:59:44,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 1026 transitions, 18602 flow [2023-08-27 01:59:44,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 01:59:44,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 01:59:44,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3479 transitions. [2023-08-27 01:59:44,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32538346427235315 [2023-08-27 01:59:44,942 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3479 transitions. [2023-08-27 01:59:44,942 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3479 transitions. [2023-08-27 01:59:44,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:59:44,943 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3479 transitions. [2023-08-27 01:59:44,946 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 96.63888888888889) internal successors, (3479), 36 states have internal predecessors, (3479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:44,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 297.0) internal successors, (10989), 37 states have internal predecessors, (10989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:44,952 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 297.0) internal successors, (10989), 37 states have internal predecessors, (10989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:44,952 INFO L175 Difference]: Start difference. First operand has 363 places, 974 transitions, 17104 flow. Second operand 36 states and 3479 transitions. [2023-08-27 01:59:44,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 1026 transitions, 18602 flow [2023-08-27 01:59:45,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1026 transitions, 18293 flow, removed 67 selfloop flow, removed 16 redundant places. [2023-08-27 01:59:45,445 INFO L231 Difference]: Finished difference. Result has 383 places, 926 transitions, 16425 flow [2023-08-27 01:59:45,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=15660, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=921, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=16425, PETRI_PLACES=383, PETRI_TRANSITIONS=926} [2023-08-27 01:59:45,446 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 350 predicate places. [2023-08-27 01:59:45,446 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 926 transitions, 16425 flow [2023-08-27 01:59:45,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 92.40625) internal successors, (2957), 32 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:45,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:59:45,447 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:59:45,452 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-27 01:59:45,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-08-27 01:59:45,647 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:59:45,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:59:45,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1950934487, now seen corresponding path program 8 times [2023-08-27 01:59:45,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:59:45,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223561671] [2023-08-27 01:59:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:59:45,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:59:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:59:47,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:59:47,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:59:47,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223561671] [2023-08-27 01:59:47,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223561671] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:59:47,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108352299] [2023-08-27 01:59:47,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:59:47,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:59:47,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:59:47,751 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:59:47,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-27 01:59:47,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:59:47,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:59:47,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 01:59:47,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:59:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:59:48,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:59:48,401 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:59:48,401 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 72 treesize of output 104 [2023-08-27 01:59:48,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 01:59:48,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108352299] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:59:48,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:59:48,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 27 [2023-08-27 01:59:48,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578205455] [2023-08-27 01:59:48,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:59:48,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 01:59:48,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:59:48,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 01:59:48,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2023-08-27 01:59:48,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 01:59:48,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 926 transitions, 16425 flow. Second operand has 29 states, 29 states have (on average 85.44827586206897) internal successors, (2478), 29 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:48,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:59:48,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 01:59:48,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:59:52,303 INFO L124 PetriNetUnfolderBase]: 3235/5998 cut-off events. [2023-08-27 01:59:52,304 INFO L125 PetriNetUnfolderBase]: For 81265/81265 co-relation queries the response was YES. [2023-08-27 01:59:52,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49381 conditions, 5998 events. 3235/5998 cut-off events. For 81265/81265 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 44083 event pairs, 599 based on Foata normal form. 139/5928 useless extension candidates. Maximal degree in co-relation 49285. Up to 4441 conditions per place. [2023-08-27 01:59:52,359 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 834 selfloop transitions, 423 changer transitions 0/1259 dead transitions. [2023-08-27 01:59:52,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 1259 transitions, 23716 flow [2023-08-27 01:59:52,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-27 01:59:52,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-27 01:59:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4024 transitions. [2023-08-27 01:59:52,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30108492330714554 [2023-08-27 01:59:52,363 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4024 transitions. [2023-08-27 01:59:52,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4024 transitions. [2023-08-27 01:59:52,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:59:52,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4024 transitions. [2023-08-27 01:59:52,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 89.42222222222222) internal successors, (4024), 45 states have internal predecessors, (4024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:52,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 297.0) internal successors, (13662), 46 states have internal predecessors, (13662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:52,374 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 297.0) internal successors, (13662), 46 states have internal predecessors, (13662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:52,374 INFO L175 Difference]: Start difference. First operand has 383 places, 926 transitions, 16425 flow. Second operand 45 states and 4024 transitions. [2023-08-27 01:59:52,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 1259 transitions, 23716 flow [2023-08-27 01:59:52,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 1259 transitions, 23234 flow, removed 171 selfloop flow, removed 19 redundant places. [2023-08-27 01:59:52,826 INFO L231 Difference]: Finished difference. Result has 423 places, 1102 transitions, 20705 flow [2023-08-27 01:59:52,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=15789, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=20705, PETRI_PLACES=423, PETRI_TRANSITIONS=1102} [2023-08-27 01:59:52,828 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 390 predicate places. [2023-08-27 01:59:52,828 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 1102 transitions, 20705 flow [2023-08-27 01:59:52,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 85.44827586206897) internal successors, (2478), 29 states have internal predecessors, (2478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:52,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:59:52,828 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:59:52,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-27 01:59:53,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:59:53,032 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:59:53,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:59:53,032 INFO L85 PathProgramCache]: Analyzing trace with hash 64855459, now seen corresponding path program 2 times [2023-08-27 01:59:53,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:59:53,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564853376] [2023-08-27 01:59:53,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:59:53,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:59:53,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:59:54,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:59:54,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:59:54,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564853376] [2023-08-27 01:59:54,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564853376] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:59:54,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122022115] [2023-08-27 01:59:54,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:59:54,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:59:54,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:59:54,236 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:59:54,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-27 01:59:54,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:59:54,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:59:54,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 01:59:54,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:59:54,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:59:54,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:59:54,627 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 01:59:54,628 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 25 treesize of output 13 [2023-08-27 01:59:54,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 01:59:54,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122022115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:59:54,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:59:54,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 6] total 24 [2023-08-27 01:59:54,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129928331] [2023-08-27 01:59:54,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:59:54,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 01:59:54,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:59:54,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 01:59:54,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2023-08-27 01:59:54,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 01:59:54,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 1102 transitions, 20705 flow. Second operand has 26 states, 26 states have (on average 88.34615384615384) internal successors, (2297), 26 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:54,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:59:54,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 01:59:54,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:59:57,313 INFO L124 PetriNetUnfolderBase]: 3461/6529 cut-off events. [2023-08-27 01:59:57,314 INFO L125 PetriNetUnfolderBase]: For 108768/108768 co-relation queries the response was YES. [2023-08-27 01:59:57,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57184 conditions, 6529 events. 3461/6529 cut-off events. For 108768/108768 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 49581 event pairs, 63 based on Foata normal form. 52/6367 useless extension candidates. Maximal degree in co-relation 57075. Up to 2590 conditions per place. [2023-08-27 01:59:57,382 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 444 selfloop transitions, 850 changer transitions 2/1298 dead transitions. [2023-08-27 01:59:57,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1298 transitions, 26030 flow [2023-08-27 01:59:57,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 01:59:57,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 01:59:57,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2156 transitions. [2023-08-27 01:59:57,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31561996779388085 [2023-08-27 01:59:57,384 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2156 transitions. [2023-08-27 01:59:57,384 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2156 transitions. [2023-08-27 01:59:57,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:59:57,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2156 transitions. [2023-08-27 01:59:57,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 93.73913043478261) internal successors, (2156), 23 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:57,390 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 297.0) internal successors, (7128), 24 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:57,390 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 297.0) internal successors, (7128), 24 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:57,390 INFO L175 Difference]: Start difference. First operand has 423 places, 1102 transitions, 20705 flow. Second operand 23 states and 2156 transitions. [2023-08-27 01:59:57,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1298 transitions, 26030 flow [2023-08-27 01:59:58,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 1298 transitions, 25108 flow, removed 445 selfloop flow, removed 9 redundant places. [2023-08-27 01:59:58,230 INFO L231 Difference]: Finished difference. Result has 441 places, 1216 transitions, 24116 flow [2023-08-27 01:59:58,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=19785, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1095, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=24116, PETRI_PLACES=441, PETRI_TRANSITIONS=1216} [2023-08-27 01:59:58,231 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 408 predicate places. [2023-08-27 01:59:58,231 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 1216 transitions, 24116 flow [2023-08-27 01:59:58,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 88.34615384615384) internal successors, (2297), 26 states have internal predecessors, (2297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:58,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:59:58,232 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:59:58,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-27 01:59:58,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-27 01:59:58,432 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:59:58,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:59:58,432 INFO L85 PathProgramCache]: Analyzing trace with hash -688384955, now seen corresponding path program 3 times [2023-08-27 01:59:58,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:59:58,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101862611] [2023-08-27 01:59:58,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:59:58,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:59:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:59:59,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:59:59,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:59:59,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101862611] [2023-08-27 01:59:59,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101862611] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:59:59,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245626825] [2023-08-27 01:59:59,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:59:59,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:59:59,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:59:59,095 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:59:59,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-27 01:59:59,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:59:59,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:59:59,256 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 01:59:59,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:59:59,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:59:59,370 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 18 treesize of output 20 [2023-08-27 01:59:59,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:59:59,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:59:59,630 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:59:59,631 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 42 treesize of output 34 [2023-08-27 01:59:59,635 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-08-27 01:59:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:59:59,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245626825] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:59:59,893 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:59:59,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 27 [2023-08-27 01:59:59,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633374569] [2023-08-27 01:59:59,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:59:59,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 01:59:59,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:59:59,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 01:59:59,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2023-08-27 01:59:59,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 01:59:59,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 1216 transitions, 24116 flow. Second operand has 29 states, 29 states have (on average 88.3103448275862) internal successors, (2561), 29 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:59:59,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:59:59,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 01:59:59,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:00:03,245 INFO L124 PetriNetUnfolderBase]: 3469/6573 cut-off events. [2023-08-27 02:00:03,246 INFO L125 PetriNetUnfolderBase]: For 115528/115528 co-relation queries the response was YES. [2023-08-27 02:00:03,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59531 conditions, 6573 events. 3469/6573 cut-off events. For 115528/115528 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 50341 event pairs, 98 based on Foata normal form. 12/6385 useless extension candidates. Maximal degree in co-relation 59417. Up to 2585 conditions per place. [2023-08-27 02:00:03,322 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 439 selfloop transitions, 866 changer transitions 2/1309 dead transitions. [2023-08-27 02:00:03,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 1309 transitions, 27507 flow [2023-08-27 02:00:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 02:00:03,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 02:00:03,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2226 transitions. [2023-08-27 02:00:03,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3122895622895623 [2023-08-27 02:00:03,324 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2226 transitions. [2023-08-27 02:00:03,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2226 transitions. [2023-08-27 02:00:03,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:00:03,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2226 transitions. [2023-08-27 02:00:03,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 92.75) internal successors, (2226), 24 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:03,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 297.0) internal successors, (7425), 25 states have internal predecessors, (7425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:03,331 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 297.0) internal successors, (7425), 25 states have internal predecessors, (7425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:03,331 INFO L175 Difference]: Start difference. First operand has 441 places, 1216 transitions, 24116 flow. Second operand 24 states and 2226 transitions. [2023-08-27 02:00:03,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 1309 transitions, 27507 flow [2023-08-27 02:00:04,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 1309 transitions, 26779 flow, removed 289 selfloop flow, removed 11 redundant places. [2023-08-27 02:00:04,641 INFO L231 Difference]: Finished difference. Result has 456 places, 1247 transitions, 26149 flow [2023-08-27 02:00:04,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=23372, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=834, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=26149, PETRI_PLACES=456, PETRI_TRANSITIONS=1247} [2023-08-27 02:00:04,642 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 423 predicate places. [2023-08-27 02:00:04,642 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 1247 transitions, 26149 flow [2023-08-27 02:00:04,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 88.3103448275862) internal successors, (2561), 29 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:04,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:00:04,643 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:00:04,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-27 02:00:04,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:00:04,843 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 02:00:04,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:00:04,844 INFO L85 PathProgramCache]: Analyzing trace with hash -719688372, now seen corresponding path program 7 times [2023-08-27 02:00:04,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:00:04,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669169443] [2023-08-27 02:00:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:00:04,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:00:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:00:05,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:00:05,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:00:05,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669169443] [2023-08-27 02:00:05,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669169443] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:00:05,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63666756] [2023-08-27 02:00:05,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 02:00:05,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:00:05,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:00:05,369 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:00:05,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-27 02:00:05,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:00:05,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 02:00:05,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:00:05,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:00:05,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:00:05,729 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 02:00:05,729 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 27 treesize of output 15 [2023-08-27 02:00:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:00:05,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63666756] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:00:05,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:00:05,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 23 [2023-08-27 02:00:05,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60347941] [2023-08-27 02:00:05,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:00:05,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 02:00:05,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:00:05,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 02:00:05,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2023-08-27 02:00:05,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 297 [2023-08-27 02:00:05,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 1247 transitions, 26149 flow. Second operand has 25 states, 25 states have (on average 92.4) internal successors, (2310), 25 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:05,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:00:05,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 297 [2023-08-27 02:00:05,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:00:11,526 INFO L124 PetriNetUnfolderBase]: 5179/9602 cut-off events. [2023-08-27 02:00:11,527 INFO L125 PetriNetUnfolderBase]: For 189149/189149 co-relation queries the response was YES. [2023-08-27 02:00:11,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93236 conditions, 9602 events. 5179/9602 cut-off events. For 189149/189149 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 75299 event pairs, 20 based on Foata normal form. 204/9444 useless extension candidates. Maximal degree in co-relation 93122. Up to 3523 conditions per place. [2023-08-27 02:00:11,692 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 427 selfloop transitions, 1546 changer transitions 0/1975 dead transitions. [2023-08-27 02:00:11,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 1975 transitions, 42066 flow [2023-08-27 02:00:11,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-27 02:00:11,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-27 02:00:11,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 5965 transitions. [2023-08-27 02:00:11,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3347362514029181 [2023-08-27 02:00:11,698 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 5965 transitions. [2023-08-27 02:00:11,698 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 5965 transitions. [2023-08-27 02:00:11,699 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:00:11,699 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 5965 transitions. [2023-08-27 02:00:11,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 99.41666666666667) internal successors, (5965), 60 states have internal predecessors, (5965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:11,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 297.0) internal successors, (18117), 61 states have internal predecessors, (18117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:11,712 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 297.0) internal successors, (18117), 61 states have internal predecessors, (18117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:11,712 INFO L175 Difference]: Start difference. First operand has 456 places, 1247 transitions, 26149 flow. Second operand 60 states and 5965 transitions. [2023-08-27 02:00:11,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 1975 transitions, 42066 flow [2023-08-27 02:00:13,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1975 transitions, 41716 flow, removed 53 selfloop flow, removed 17 redundant places. [2023-08-27 02:00:13,968 INFO L231 Difference]: Finished difference. Result has 510 places, 1716 transitions, 39972 flow [2023-08-27 02:00:13,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=25463, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=39972, PETRI_PLACES=510, PETRI_TRANSITIONS=1716} [2023-08-27 02:00:13,969 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 477 predicate places. [2023-08-27 02:00:13,970 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 1716 transitions, 39972 flow [2023-08-27 02:00:13,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 92.4) internal successors, (2310), 25 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:13,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:00:13,970 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:00:13,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-27 02:00:14,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-27 02:00:14,176 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 02:00:14,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:00:14,176 INFO L85 PathProgramCache]: Analyzing trace with hash -676880096, now seen corresponding path program 8 times [2023-08-27 02:00:14,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:00:14,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81205296] [2023-08-27 02:00:14,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:00:14,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:00:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:00:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:00:15,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:00:15,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81205296] [2023-08-27 02:00:15,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81205296] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:00:15,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557928278] [2023-08-27 02:00:15,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 02:00:15,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:00:15,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:00:15,240 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:00:15,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-27 02:00:15,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 02:00:15,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:00:15,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 02:00:15,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:00:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:00:15,535 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:00:15,562 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:00:15,563 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 27 treesize of output 19 [2023-08-27 02:00:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:00:15,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557928278] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:00:15,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:00:15,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 5] total 20 [2023-08-27 02:00:15,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299874183] [2023-08-27 02:00:15,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:00:15,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 02:00:15,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:00:15,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 02:00:15,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=413, Unknown=0, NotChecked=0, Total=462 [2023-08-27 02:00:15,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 02:00:15,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 1716 transitions, 39972 flow. Second operand has 22 states, 22 states have (on average 88.5) internal successors, (1947), 22 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:15,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:00:15,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 02:00:15,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:00:21,431 INFO L124 PetriNetUnfolderBase]: 5370/10025 cut-off events. [2023-08-27 02:00:21,431 INFO L125 PetriNetUnfolderBase]: For 222034/222034 co-relation queries the response was YES. [2023-08-27 02:00:21,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103397 conditions, 10025 events. 5370/10025 cut-off events. For 222034/222034 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 79796 event pairs, 430 based on Foata normal form. 290/9977 useless extension candidates. Maximal degree in co-relation 103273. Up to 4935 conditions per place. [2023-08-27 02:00:21,554 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 841 selfloop transitions, 1179 changer transitions 16/2038 dead transitions. [2023-08-27 02:00:21,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 2038 transitions, 49414 flow [2023-08-27 02:00:21,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 02:00:21,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 02:00:21,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2547 transitions. [2023-08-27 02:00:21,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3176206509539843 [2023-08-27 02:00:21,556 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2547 transitions. [2023-08-27 02:00:21,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2547 transitions. [2023-08-27 02:00:21,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:00:21,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2547 transitions. [2023-08-27 02:00:21,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 94.33333333333333) internal successors, (2547), 27 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:21,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 297.0) internal successors, (8316), 28 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:21,562 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 297.0) internal successors, (8316), 28 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:21,562 INFO L175 Difference]: Start difference. First operand has 510 places, 1716 transitions, 39972 flow. Second operand 27 states and 2547 transitions. [2023-08-27 02:00:21,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 2038 transitions, 49414 flow [2023-08-27 02:00:24,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 2038 transitions, 42301 flow, removed 2510 selfloop flow, removed 18 redundant places. [2023-08-27 02:00:24,631 INFO L231 Difference]: Finished difference. Result has 519 places, 1873 transitions, 38934 flow [2023-08-27 02:00:24,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=30983, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=895, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=698, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=38934, PETRI_PLACES=519, PETRI_TRANSITIONS=1873} [2023-08-27 02:00:24,632 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 486 predicate places. [2023-08-27 02:00:24,632 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 1873 transitions, 38934 flow [2023-08-27 02:00:24,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 88.5) internal successors, (1947), 22 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:24,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:00:24,632 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:00:24,638 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-27 02:00:24,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-27 02:00:24,833 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 02:00:24,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:00:24,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1318019057, now seen corresponding path program 9 times [2023-08-27 02:00:24,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:00:24,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073743413] [2023-08-27 02:00:24,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:00:24,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:00:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:00:25,630 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 02:00:25,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:00:25,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073743413] [2023-08-27 02:00:25,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073743413] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:00:25,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361218529] [2023-08-27 02:00:25,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 02:00:25,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:00:25,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:00:25,631 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:00:25,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-27 02:00:25,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 02:00:25,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:00:25,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 02:00:25,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:00:25,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 02:00:25,923 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 19 treesize of output 21 [2023-08-27 02:00:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 02:00:26,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:00:26,258 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1584 (Array Int Int))) (let ((.cse1 (* 4 c_~q_back~0)) (.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1584) c_~q~0.base))) (or (not (= (select .cse0 (+ c_~q~0.offset .cse1 4)) 1)) (not (= (select .cse0 (+ c_~q~0.offset .cse1)) 1)) (< (let ((.cse2 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse0 (+ .cse2 c_~q~0.offset)) (select .cse0 (+ .cse2 c_~q~0.offset 8)) (select .cse0 (+ .cse2 c_~q~0.offset 4)))) 2147483648)))) is different from false [2023-08-27 02:00:26,306 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:00:26,306 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 150 treesize of output 182 [2023-08-27 02:00:26,340 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:00:26,340 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 82 treesize of output 104 [2023-08-27 02:00:27,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 02:00:27,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361218529] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:00:27,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:00:27,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 27 [2023-08-27 02:00:27,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600852806] [2023-08-27 02:00:27,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:00:27,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 02:00:27,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:00:27,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 02:00:27,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=664, Unknown=1, NotChecked=52, Total=812 [2023-08-27 02:00:27,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 02:00:27,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1873 transitions, 38934 flow. Second operand has 29 states, 29 states have (on average 88.3103448275862) internal successors, (2561), 29 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:27,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:00:27,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 02:00:27,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:00:33,220 INFO L124 PetriNetUnfolderBase]: 5555/10379 cut-off events. [2023-08-27 02:00:33,221 INFO L125 PetriNetUnfolderBase]: For 165242/165242 co-relation queries the response was YES. [2023-08-27 02:00:33,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93809 conditions, 10379 events. 5555/10379 cut-off events. For 165242/165242 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 83321 event pairs, 613 based on Foata normal form. 122/10055 useless extension candidates. Maximal degree in co-relation 93692. Up to 7753 conditions per place. [2023-08-27 02:00:33,333 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 1500 selfloop transitions, 529 changer transitions 12/2043 dead transitions. [2023-08-27 02:00:33,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 2043 transitions, 45615 flow [2023-08-27 02:00:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 02:00:33,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 02:00:33,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3136 transitions. [2023-08-27 02:00:33,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3105565458506635 [2023-08-27 02:00:33,336 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3136 transitions. [2023-08-27 02:00:33,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3136 transitions. [2023-08-27 02:00:33,336 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:00:33,336 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3136 transitions. [2023-08-27 02:00:33,338 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 92.23529411764706) internal successors, (3136), 34 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:33,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 297.0) internal successors, (10395), 35 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:33,342 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 297.0) internal successors, (10395), 35 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:33,342 INFO L175 Difference]: Start difference. First operand has 519 places, 1873 transitions, 38934 flow. Second operand 34 states and 3136 transitions. [2023-08-27 02:00:33,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 2043 transitions, 45615 flow [2023-08-27 02:00:35,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 2043 transitions, 45210 flow, removed 104 selfloop flow, removed 8 redundant places. [2023-08-27 02:00:35,592 INFO L231 Difference]: Finished difference. Result has 548 places, 1897 transitions, 40756 flow [2023-08-27 02:00:35,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=38253, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1851, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=40756, PETRI_PLACES=548, PETRI_TRANSITIONS=1897} [2023-08-27 02:00:35,593 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 515 predicate places. [2023-08-27 02:00:35,593 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 1897 transitions, 40756 flow [2023-08-27 02:00:35,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 88.3103448275862) internal successors, (2561), 29 states have internal predecessors, (2561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:35,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:00:35,594 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:00:35,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-27 02:00:35,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-27 02:00:35,794 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 02:00:35,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:00:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash 237945865, now seen corresponding path program 10 times [2023-08-27 02:00:35,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:00:35,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788869953] [2023-08-27 02:00:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:00:35,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:00:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:00:37,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:00:37,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:00:37,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788869953] [2023-08-27 02:00:37,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788869953] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:00:37,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932518170] [2023-08-27 02:00:37,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 02:00:37,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:00:37,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:00:37,178 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:00:37,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-27 02:00:37,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 02:00:37,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:00:37,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-27 02:00:37,311 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:00:37,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 02:00:37,539 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 42 treesize of output 40 [2023-08-27 02:00:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:00:37,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:00:37,739 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1627 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1627) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse0 (+ .cse1 c_~q~0.offset 8)) (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) 2147483648)) is different from false [2023-08-27 02:00:37,866 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:00:37,867 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 108 treesize of output 140 [2023-08-27 02:00:37,921 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:00:37,921 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 7 [2023-08-27 02:00:38,018 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:00:38,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932518170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:00:38,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:00:38,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 31 [2023-08-27 02:00:38,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899908104] [2023-08-27 02:00:38,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:00:38,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 02:00:38,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:00:38,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 02:00:38,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=871, Unknown=1, NotChecked=60, Total=1056 [2023-08-27 02:00:38,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 02:00:38,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 1897 transitions, 40756 flow. Second operand has 33 states, 33 states have (on average 88.27272727272727) internal successors, (2913), 33 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:38,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:00:38,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 02:00:38,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:00:41,611 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 02:00:43,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:00:48,348 WARN L539 Checker$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 02:00:49,547 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:00:53,541 INFO L124 PetriNetUnfolderBase]: 5963/11012 cut-off events. [2023-08-27 02:00:53,541 INFO L125 PetriNetUnfolderBase]: For 199843/199843 co-relation queries the response was YES. [2023-08-27 02:00:53,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103013 conditions, 11012 events. 5963/11012 cut-off events. For 199843/199843 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 87149 event pairs, 380 based on Foata normal form. 112/10678 useless extension candidates. Maximal degree in co-relation 102893. Up to 7771 conditions per place. [2023-08-27 02:00:53,677 INFO L140 encePairwiseOnDemand]: 286/297 looper letters, 1534 selfloop transitions, 645 changer transitions 8/2189 dead transitions. [2023-08-27 02:00:53,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 2189 transitions, 49760 flow [2023-08-27 02:00:53,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-27 02:00:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-27 02:00:53,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3228 transitions. [2023-08-27 02:00:53,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31053391053391055 [2023-08-27 02:00:53,680 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3228 transitions. [2023-08-27 02:00:53,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3228 transitions. [2023-08-27 02:00:53,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:00:53,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3228 transitions. [2023-08-27 02:00:53,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 92.22857142857143) internal successors, (3228), 35 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:53,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 297.0) internal successors, (10692), 36 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:53,687 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 297.0) internal successors, (10692), 36 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:53,687 INFO L175 Difference]: Start difference. First operand has 548 places, 1897 transitions, 40756 flow. Second operand 35 states and 3228 transitions. [2023-08-27 02:00:53,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 2189 transitions, 49760 flow [2023-08-27 02:00:56,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 2189 transitions, 49293 flow, removed 118 selfloop flow, removed 14 redundant places. [2023-08-27 02:00:56,751 INFO L231 Difference]: Finished difference. Result has 574 places, 1969 transitions, 43694 flow [2023-08-27 02:00:56,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=40266, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1893, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=568, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=43694, PETRI_PLACES=574, PETRI_TRANSITIONS=1969} [2023-08-27 02:00:56,753 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 541 predicate places. [2023-08-27 02:00:56,753 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 1969 transitions, 43694 flow [2023-08-27 02:00:56,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 88.27272727272727) internal successors, (2913), 33 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:00:56,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:00:56,754 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:00:56,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-27 02:00:56,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-27 02:00:56,954 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 02:00:56,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:00:56,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1484936763, now seen corresponding path program 11 times [2023-08-27 02:00:56,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:00:56,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164590677] [2023-08-27 02:00:56,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:00:56,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:00:56,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:00:57,718 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 02:00:57,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:00:57,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164590677] [2023-08-27 02:00:57,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164590677] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:00:57,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720614253] [2023-08-27 02:00:57,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 02:00:57,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:00:57,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:00:57,720 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:00:57,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-27 02:00:57,871 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 02:00:57,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:00:57,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 68 conjunts are in the unsatisfiable core [2023-08-27 02:00:57,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:00:57,918 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 02:00:57,958 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 02:00:57,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 02:00:58,044 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 02:00:58,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 02:00:58,121 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 16 treesize of output 18 [2023-08-27 02:00:58,358 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 02:00:58,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:01:01,053 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:01:01,053 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 3 case distinctions, treesize of input 272 treesize of output 142 [2023-08-27 02:01:01,129 INFO L322 Elim1Store]: treesize reduction 26, result has 74.8 percent of original size [2023-08-27 02:01:01,130 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 324 treesize of output 349 [2023-08-27 02:01:01,140 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 02:01:01,141 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 02:01:01,164 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:01:01,164 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 249 treesize of output 231 [2023-08-27 02:01:01,241 INFO L322 Elim1Store]: treesize reduction 26, result has 74.8 percent of original size [2023-08-27 02:01:01,242 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 178 treesize of output 215 [2023-08-27 02:01:04,372 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 02:01:04,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720614253] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:01:04,372 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:01:04,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-27 02:01:04,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257158826] [2023-08-27 02:01:04,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:01:04,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 02:01:04,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:01:04,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 02:01:04,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=967, Unknown=5, NotChecked=0, Total=1190 [2023-08-27 02:01:04,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 02:01:04,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 1969 transitions, 43694 flow. Second operand has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:01:04,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:01:04,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 02:01:04,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:01:13,101 INFO L124 PetriNetUnfolderBase]: 5869/10811 cut-off events. [2023-08-27 02:01:13,101 INFO L125 PetriNetUnfolderBase]: For 221170/221170 co-relation queries the response was YES. [2023-08-27 02:01:13,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107208 conditions, 10811 events. 5869/10811 cut-off events. For 221170/221170 co-relation queries the response was YES. Maximal size of possible extension queue 678. Compared 85185 event pairs, 1579 based on Foata normal form. 82/10458 useless extension candidates. Maximal degree in co-relation 107081. Up to 9189 conditions per place. [2023-08-27 02:01:13,238 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 1666 selfloop transitions, 341 changer transitions 9/2018 dead transitions. [2023-08-27 02:01:13,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 2018 transitions, 47438 flow [2023-08-27 02:01:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-27 02:01:13,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-27 02:01:13,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3548 transitions. [2023-08-27 02:01:13,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29865319865319867 [2023-08-27 02:01:13,241 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3548 transitions. [2023-08-27 02:01:13,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3548 transitions. [2023-08-27 02:01:13,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:01:13,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3548 transitions. [2023-08-27 02:01:13,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 88.7) internal successors, (3548), 40 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:01:13,248 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 297.0) internal successors, (12177), 41 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:01:13,248 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 297.0) internal successors, (12177), 41 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:01:13,248 INFO L175 Difference]: Start difference. First operand has 574 places, 1969 transitions, 43694 flow. Second operand 40 states and 3548 transitions. [2023-08-27 02:01:13,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 2018 transitions, 47438 flow [2023-08-27 02:01:16,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 2018 transitions, 46252 flow, removed 278 selfloop flow, removed 16 redundant places. [2023-08-27 02:01:16,152 INFO L231 Difference]: Finished difference. Result has 595 places, 1919 transitions, 42037 flow [2023-08-27 02:01:16,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=41518, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1927, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=341, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=42037, PETRI_PLACES=595, PETRI_TRANSITIONS=1919} [2023-08-27 02:01:16,153 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 562 predicate places. [2023-08-27 02:01:16,153 INFO L495 AbstractCegarLoop]: Abstraction has has 595 places, 1919 transitions, 42037 flow [2023-08-27 02:01:16,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:01:16,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:01:16,154 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:01:16,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-27 02:01:16,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-27 02:01:16,354 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 02:01:16,354 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:01:16,354 INFO L85 PathProgramCache]: Analyzing trace with hash -679558135, now seen corresponding path program 12 times [2023-08-27 02:01:16,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:01:16,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423219956] [2023-08-27 02:01:16,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:01:16,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:01:16,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:01:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:01:17,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:01:17,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423219956] [2023-08-27 02:01:17,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423219956] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:01:17,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270955205] [2023-08-27 02:01:17,533 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 02:01:17,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:01:17,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:01:17,534 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:01:17,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-27 02:01:17,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 02:01:17,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:01:17,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-27 02:01:17,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:01:17,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 02:01:17,876 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 19 treesize of output 21 [2023-08-27 02:01:18,056 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:01:18,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:01:18,363 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:01:18,363 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 150 treesize of output 182 [2023-08-27 02:01:18,403 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:01:18,403 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 82 treesize of output 104 [2023-08-27 02:01:19,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:01:19,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270955205] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:01:19,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:01:19,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 31 [2023-08-27 02:01:19,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604522235] [2023-08-27 02:01:19,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:01:19,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 02:01:19,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:01:19,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 02:01:19,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=933, Unknown=7, NotChecked=0, Total=1056 [2023-08-27 02:01:19,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 02:01:19,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 595 places, 1919 transitions, 42037 flow. Second operand has 33 states, 33 states have (on average 88.27272727272727) internal successors, (2913), 33 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:01:19,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:01:19,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 02:01:19,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:01:21,772 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 02:01:24,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:01:26,577 WARN L539 Checker$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 02:01:28,620 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:01:30,658 WARN L539 Checker$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 02:01:32,662 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:01:34,684 WARN L539 Checker$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 02:01:37,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:01:39,949 WARN L539 Checker$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 02:01:45,639 INFO L124 PetriNetUnfolderBase]: 6148/11440 cut-off events. [2023-08-27 02:01:45,639 INFO L125 PetriNetUnfolderBase]: For 236010/236010 co-relation queries the response was YES. [2023-08-27 02:01:45,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111747 conditions, 11440 events. 6148/11440 cut-off events. For 236010/236010 co-relation queries the response was YES. Maximal size of possible extension queue 688. Compared 91547 event pairs, 400 based on Foata normal form. 225/11277 useless extension candidates. Maximal degree in co-relation 111623. Up to 7954 conditions per place. [2023-08-27 02:01:45,774 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 1334 selfloop transitions, 912 changer transitions 1/2249 dead transitions. [2023-08-27 02:01:45,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 636 places, 2249 transitions, 52834 flow [2023-08-27 02:01:45,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-27 02:01:45,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-27 02:01:45,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4343 transitions. [2023-08-27 02:01:45,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31112543878501325 [2023-08-27 02:01:45,778 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4343 transitions. [2023-08-27 02:01:45,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4343 transitions. [2023-08-27 02:01:45,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:01:45,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4343 transitions. [2023-08-27 02:01:45,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 92.40425531914893) internal successors, (4343), 47 states have internal predecessors, (4343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:01:45,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 297.0) internal successors, (14256), 48 states have internal predecessors, (14256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:01:45,787 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 297.0) internal successors, (14256), 48 states have internal predecessors, (14256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:01:45,787 INFO L175 Difference]: Start difference. First operand has 595 places, 1919 transitions, 42037 flow. Second operand 47 states and 4343 transitions. [2023-08-27 02:01:45,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 636 places, 2249 transitions, 52834 flow [2023-08-27 02:01:48,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 2249 transitions, 52159 flow, removed 95 selfloop flow, removed 24 redundant places. [2023-08-27 02:01:48,345 INFO L231 Difference]: Finished difference. Result has 628 places, 2071 transitions, 47985 flow [2023-08-27 02:01:48,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=40831, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1897, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=760, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1065, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=47985, PETRI_PLACES=628, PETRI_TRANSITIONS=2071} [2023-08-27 02:01:48,346 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 595 predicate places. [2023-08-27 02:01:48,346 INFO L495 AbstractCegarLoop]: Abstraction has has 628 places, 2071 transitions, 47985 flow [2023-08-27 02:01:48,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 88.27272727272727) internal successors, (2913), 33 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:01:48,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:01:48,347 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:01:48,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-27 02:01:48,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-27 02:01:48,550 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 02:01:48,550 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:01:48,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1320789837, now seen corresponding path program 4 times [2023-08-27 02:01:48,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:01:48,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703295678] [2023-08-27 02:01:48,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:01:48,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:01:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:01:49,455 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 02:01:49,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:01:49,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703295678] [2023-08-27 02:01:49,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703295678] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:01:49,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427581679] [2023-08-27 02:01:49,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 02:01:49,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:01:49,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:01:49,457 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:01:49,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-27 02:01:49,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 02:01:49,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:01:49,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 02:01:49,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:01:49,904 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 02:01:49,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:01:49,933 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:01:49,934 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 26 treesize of output 18 [2023-08-27 02:01:50,389 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:01:50,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427581679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:01:50,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:01:50,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 31 [2023-08-27 02:01:50,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709088827] [2023-08-27 02:01:50,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:01:50,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 02:01:50,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:01:50,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 02:01:50,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2023-08-27 02:01:50,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 02:01:50,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 2071 transitions, 47985 flow. Second operand has 33 states, 33 states have (on average 88.27272727272727) internal successors, (2913), 33 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:01:50,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:01:50,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 02:01:50,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:01:57,117 INFO L124 PetriNetUnfolderBase]: 5800/10648 cut-off events. [2023-08-27 02:01:57,117 INFO L125 PetriNetUnfolderBase]: For 248829/248829 co-relation queries the response was YES. [2023-08-27 02:01:57,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108965 conditions, 10648 events. 5800/10648 cut-off events. For 248829/248829 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 82476 event pairs, 792 based on Foata normal form. 39/10307 useless extension candidates. Maximal degree in co-relation 108826. Up to 9519 conditions per place. [2023-08-27 02:01:57,272 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 1663 selfloop transitions, 263 changer transitions 18/1946 dead transitions. [2023-08-27 02:01:57,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 627 places, 1946 transitions, 47376 flow [2023-08-27 02:01:57,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 02:01:57,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 02:01:57,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2487 transitions. [2023-08-27 02:01:57,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31013842124953234 [2023-08-27 02:01:57,274 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2487 transitions. [2023-08-27 02:01:57,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2487 transitions. [2023-08-27 02:01:57,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:01:57,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2487 transitions. [2023-08-27 02:01:57,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 92.11111111111111) internal successors, (2487), 27 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:01:57,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 297.0) internal successors, (8316), 28 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:01:57,279 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 297.0) internal successors, (8316), 28 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:01:57,279 INFO L175 Difference]: Start difference. First operand has 628 places, 2071 transitions, 47985 flow. Second operand 27 states and 2487 transitions. [2023-08-27 02:01:57,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 627 places, 1946 transitions, 47376 flow [2023-08-27 02:02:00,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 1946 transitions, 45559 flow, removed 691 selfloop flow, removed 34 redundant places. [2023-08-27 02:02:00,641 INFO L231 Difference]: Finished difference. Result has 593 places, 1865 transitions, 41300 flow [2023-08-27 02:02:00,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=41294, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1881, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1618, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=41300, PETRI_PLACES=593, PETRI_TRANSITIONS=1865} [2023-08-27 02:02:00,642 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 560 predicate places. [2023-08-27 02:02:00,642 INFO L495 AbstractCegarLoop]: Abstraction has has 593 places, 1865 transitions, 41300 flow [2023-08-27 02:02:00,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 88.27272727272727) internal successors, (2913), 33 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:02:00,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:02:00,643 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:02:00,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-27 02:02:00,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-08-27 02:02:00,843 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 02:02:00,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:02:00,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1418462175, now seen corresponding path program 5 times [2023-08-27 02:02:00,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:02:00,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058142693] [2023-08-27 02:02:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:02:00,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:02:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:02:00,928 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:02:00,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:02:00,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058142693] [2023-08-27 02:02:00,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058142693] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:02:00,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651540527] [2023-08-27 02:02:00,928 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 02:02:00,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:02:00,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:02:00,929 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:02:00,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-27 02:02:01,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 02:02:01,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:02:01,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 02:02:01,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:02:01,109 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:02:01,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:02:01,211 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:02:01,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651540527] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:02:01,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:02:01,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 7] total 12 [2023-08-27 02:02:01,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164589494] [2023-08-27 02:02:01,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:02:01,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 02:02:01,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:02:01,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 02:02:01,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-08-27 02:02:01,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 297 [2023-08-27 02:02:01,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 593 places, 1865 transitions, 41300 flow. Second operand has 14 states, 14 states have (on average 122.0) internal successors, (1708), 14 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:02:01,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:02:01,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 297 [2023-08-27 02:02:01,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:02:06,792 INFO L124 PetriNetUnfolderBase]: 6749/12199 cut-off events. [2023-08-27 02:02:06,793 INFO L125 PetriNetUnfolderBase]: For 289236/289236 co-relation queries the response was YES. [2023-08-27 02:02:06,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126833 conditions, 12199 events. 6749/12199 cut-off events. For 289236/289236 co-relation queries the response was YES. Maximal size of possible extension queue 733. Compared 95748 event pairs, 367 based on Foata normal form. 50/11825 useless extension candidates. Maximal degree in co-relation 126703. Up to 5359 conditions per place. [2023-08-27 02:02:06,967 INFO L140 encePairwiseOnDemand]: 290/297 looper letters, 749 selfloop transitions, 1432 changer transitions 30/2213 dead transitions. [2023-08-27 02:02:06,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 589 places, 2213 transitions, 53820 flow [2023-08-27 02:02:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 02:02:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 02:02:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 789 transitions. [2023-08-27 02:02:06,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44276094276094274 [2023-08-27 02:02:06,968 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 789 transitions. [2023-08-27 02:02:06,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 789 transitions. [2023-08-27 02:02:06,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:02:06,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 789 transitions. [2023-08-27 02:02:06,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 131.5) internal successors, (789), 6 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:02:06,970 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:02:06,970 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:02:06,970 INFO L175 Difference]: Start difference. First operand has 593 places, 1865 transitions, 41300 flow. Second operand 6 states and 789 transitions. [2023-08-27 02:02:06,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 589 places, 2213 transitions, 53820 flow [2023-08-27 02:02:10,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 560 places, 2213 transitions, 53304 flow, removed 77 selfloop flow, removed 29 redundant places. [2023-08-27 02:02:10,736 INFO L231 Difference]: Finished difference. Result has 562 places, 2155 transitions, 52639 flow [2023-08-27 02:02:10,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=40752, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1857, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=52639, PETRI_PLACES=562, PETRI_TRANSITIONS=2155} [2023-08-27 02:02:10,738 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 529 predicate places. [2023-08-27 02:02:10,738 INFO L495 AbstractCegarLoop]: Abstraction has has 562 places, 2155 transitions, 52639 flow [2023-08-27 02:02:10,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 122.0) internal successors, (1708), 14 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:02:10,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:02:10,739 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:02:10,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-27 02:02:10,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:02:10,945 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 02:02:10,946 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:02:10,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1244698277, now seen corresponding path program 13 times [2023-08-27 02:02:10,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:02:10,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401636332] [2023-08-27 02:02:10,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:02:10,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:02:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:02:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:02:11,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:02:11,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401636332] [2023-08-27 02:02:11,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401636332] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:02:11,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352183269] [2023-08-27 02:02:11,727 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 02:02:11,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:02:11,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:02:11,728 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:02:11,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-27 02:02:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:02:11,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 02:02:11,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:02:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:02:12,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:02:12,315 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:02:12,315 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 72 treesize of output 104 [2023-08-27 02:02:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:02:12,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352183269] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:02:12,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:02:12,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 6] total 26 [2023-08-27 02:02:12,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551588085] [2023-08-27 02:02:12,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:02:12,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 02:02:12,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:02:12,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 02:02:12,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2023-08-27 02:02:12,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 297 [2023-08-27 02:02:12,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 562 places, 2155 transitions, 52639 flow. Second operand has 28 states, 28 states have (on average 92.5) internal successors, (2590), 28 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:02:12,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:02:12,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 297 [2023-08-27 02:02:12,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:02:20,095 INFO L124 PetriNetUnfolderBase]: 6816/12328 cut-off events. [2023-08-27 02:02:20,096 INFO L125 PetriNetUnfolderBase]: For 314710/314710 co-relation queries the response was YES. [2023-08-27 02:02:20,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136217 conditions, 12328 events. 6816/12328 cut-off events. For 314710/314710 co-relation queries the response was YES. Maximal size of possible extension queue 736. Compared 96694 event pairs, 1264 based on Foata normal form. 128/11996 useless extension candidates. Maximal degree in co-relation 136088. Up to 10169 conditions per place. [2023-08-27 02:02:20,261 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 1738 selfloop transitions, 572 changer transitions 0/2312 dead transitions. [2023-08-27 02:02:20,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 587 places, 2312 transitions, 59880 flow [2023-08-27 02:02:20,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 02:02:20,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 02:02:20,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3566 transitions. [2023-08-27 02:02:20,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3245063245063245 [2023-08-27 02:02:20,263 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3566 transitions. [2023-08-27 02:02:20,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3566 transitions. [2023-08-27 02:02:20,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:02:20,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3566 transitions. [2023-08-27 02:02:20,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 96.37837837837837) internal successors, (3566), 37 states have internal predecessors, (3566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:02:20,270 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 297.0) internal successors, (11286), 38 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:02:20,270 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 297.0) internal successors, (11286), 38 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:02:20,270 INFO L175 Difference]: Start difference. First operand has 562 places, 2155 transitions, 52639 flow. Second operand 37 states and 3566 transitions. [2023-08-27 02:02:20,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 587 places, 2312 transitions, 59880 flow [2023-08-27 02:02:25,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 576 places, 2312 transitions, 57639 flow, removed 1076 selfloop flow, removed 11 redundant places. [2023-08-27 02:02:25,728 INFO L231 Difference]: Finished difference. Result has 579 places, 2169 transitions, 52551 flow [2023-08-27 02:02:25,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=49686, PETRI_DIFFERENCE_MINUEND_PLACES=540, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=513, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=52551, PETRI_PLACES=579, PETRI_TRANSITIONS=2169} [2023-08-27 02:02:25,730 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 546 predicate places. [2023-08-27 02:02:25,731 INFO L495 AbstractCegarLoop]: Abstraction has has 579 places, 2169 transitions, 52551 flow [2023-08-27 02:02:25,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 92.5) internal successors, (2590), 28 states have internal predecessors, (2590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:02:25,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:02:25,731 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:02:25,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-27 02:02:25,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-08-27 02:02:25,941 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 02:02:25,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:02:25,941 INFO L85 PathProgramCache]: Analyzing trace with hash -59164381, now seen corresponding path program 14 times [2023-08-27 02:02:25,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:02:25,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824436991] [2023-08-27 02:02:25,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:02:25,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:02:25,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:02:27,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:02:27,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:02:27,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824436991] [2023-08-27 02:02:27,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824436991] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:02:27,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585291852] [2023-08-27 02:02:27,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 02:02:27,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:02:27,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:02:27,229 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:02:27,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-27 02:02:27,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 02:02:27,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:02:27,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-27 02:02:27,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:02:27,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 02:02:27,605 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 30 treesize of output 30 [2023-08-27 02:02:27,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:02:27,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:02:27,913 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1881 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1881) c_~q~0.base))) (or (< (let ((.cse1 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse0 (+ .cse1 c_~q~0.offset 8)) (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) 2147483648) (not (= (select .cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1))))) is different from false [2023-08-27 02:02:28,009 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:02:28,009 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 129 treesize of output 161 [2023-08-27 02:02:28,029 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:02:28,029 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 57 treesize of output 58 [2023-08-27 02:02:28,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:02:28,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585291852] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:02:28,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:02:28,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 31 [2023-08-27 02:02:28,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983206458] [2023-08-27 02:02:28,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:02:28,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 02:02:28,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:02:28,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 02:02:28,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=884, Unknown=1, NotChecked=60, Total=1056 [2023-08-27 02:02:28,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 02:02:28,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 579 places, 2169 transitions, 52551 flow. Second operand has 33 states, 33 states have (on average 88.27272727272727) internal successors, (2913), 33 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:02:28,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:02:28,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 02:02:28,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:02:31,357 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 02:02:38,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:02:42,436 WARN L539 Checker$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 02:02:44,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:02:50,617 WARN L234 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 02:02:54,955 WARN L539 Checker$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 02:02:56,977 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:02:59,003 WARN L539 Checker$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 02:03:01,006 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:03:07,579 WARN L539 Checker$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 02:03:09,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:03:14,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:03:16,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:03:21,138 WARN L539 Checker$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 02:03:23,430 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 02:03:29,783 INFO L124 PetriNetUnfolderBase]: 8113/14431 cut-off events. [2023-08-27 02:03:29,783 INFO L125 PetriNetUnfolderBase]: For 361952/361952 co-relation queries the response was YES. [2023-08-27 02:03:29,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155279 conditions, 14431 events. 8113/14431 cut-off events. For 361952/361952 co-relation queries the response was YES. Maximal size of possible extension queue 809. Compared 113825 event pairs, 449 based on Foata normal form. 164/14107 useless extension candidates. Maximal degree in co-relation 155153. Up to 9578 conditions per place. [2023-08-27 02:03:29,982 INFO L140 encePairwiseOnDemand]: 285/297 looper letters, 1408 selfloop transitions, 1473 changer transitions 1/2884 dead transitions. [2023-08-27 02:03:29,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 2884 transitions, 72917 flow [2023-08-27 02:03:29,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-27 02:03:29,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-27 02:03:29,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4433 transitions. [2023-08-27 02:03:29,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3109567901234568 [2023-08-27 02:03:29,986 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4433 transitions. [2023-08-27 02:03:29,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4433 transitions. [2023-08-27 02:03:29,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:03:29,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4433 transitions. [2023-08-27 02:03:29,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 92.35416666666667) internal successors, (4433), 48 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:03:29,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 297.0) internal successors, (14553), 49 states have internal predecessors, (14553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:03:29,999 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 297.0) internal successors, (14553), 49 states have internal predecessors, (14553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:03:29,999 INFO L175 Difference]: Start difference. First operand has 579 places, 2169 transitions, 52551 flow. Second operand 48 states and 4433 transitions. [2023-08-27 02:03:29,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 2884 transitions, 72917 flow [2023-08-27 02:03:34,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 614 places, 2884 transitions, 71627 flow, removed 146 selfloop flow, removed 12 redundant places. [2023-08-27 02:03:34,662 INFO L231 Difference]: Finished difference. Result has 630 places, 2674 transitions, 68168 flow [2023-08-27 02:03:34,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=51001, PETRI_DIFFERENCE_MINUEND_PLACES=567, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1030, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=855, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=68168, PETRI_PLACES=630, PETRI_TRANSITIONS=2674} [2023-08-27 02:03:34,664 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 597 predicate places. [2023-08-27 02:03:34,664 INFO L495 AbstractCegarLoop]: Abstraction has has 630 places, 2674 transitions, 68168 flow [2023-08-27 02:03:34,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 88.27272727272727) internal successors, (2913), 33 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:03:34,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:03:34,665 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:03:34,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-27 02:03:34,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:03:34,871 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 02:03:34,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:03:34,871 INFO L85 PathProgramCache]: Analyzing trace with hash -843705371, now seen corresponding path program 15 times [2023-08-27 02:03:34,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:03:34,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850353800] [2023-08-27 02:03:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:03:34,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:03:34,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:03:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:03:36,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:03:36,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850353800] [2023-08-27 02:03:36,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850353800] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:03:36,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346568106] [2023-08-27 02:03:36,126 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 02:03:36,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:03:36,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:03:36,128 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:03:36,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-27 02:03:36,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 02:03:36,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:03:36,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 02:03:36,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:03:36,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 02:03:36,408 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 18 treesize of output 20 [2023-08-27 02:03:36,621 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:03:36,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:03:37,109 INFO L322 Elim1Store]: treesize reduction 46, result has 60.7 percent of original size [2023-08-27 02:03:37,109 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 146 treesize of output 166 [2023-08-27 02:03:37,160 INFO L322 Elim1Store]: treesize reduction 46, result has 44.6 percent of original size [2023-08-27 02:03:37,160 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 80 treesize of output 84 [2023-08-27 02:03:37,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:03:37,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346568106] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:03:37,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:03:37,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 28 [2023-08-27 02:03:37,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945038245] [2023-08-27 02:03:37,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:03:37,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 02:03:37,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:03:37,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 02:03:37,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=703, Unknown=3, NotChecked=0, Total=870 [2023-08-27 02:03:37,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 02:03:37,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 630 places, 2674 transitions, 68168 flow. Second operand has 30 states, 30 states have (on average 85.3) internal successors, (2559), 30 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:03:37,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:03:37,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 02:03:37,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:03:40,286 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 02:03:42,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:03:44,356 WARN L539 Checker$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 02:03:46,671 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:03:48,687 WARN L539 Checker$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 02:03:50,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:03:53,683 WARN L539 Checker$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 02:03:55,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:03:58,698 WARN L539 Checker$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 02:04:01,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:04:07,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 02:04:12,797 INFO L124 PetriNetUnfolderBase]: 8551/15114 cut-off events. [2023-08-27 02:04:12,798 INFO L125 PetriNetUnfolderBase]: For 445708/445708 co-relation queries the response was YES. [2023-08-27 02:04:12,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179188 conditions, 15114 events. 8551/15114 cut-off events. For 445708/445708 co-relation queries the response was YES. Maximal size of possible extension queue 867. Compared 118870 event pairs, 589 based on Foata normal form. 42/14676 useless extension candidates. Maximal degree in co-relation 179047. Up to 12661 conditions per place. [2023-08-27 02:04:13,046 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 2011 selfloop transitions, 994 changer transitions 0/3007 dead transitions. [2023-08-27 02:04:13,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 666 places, 3007 transitions, 81510 flow [2023-08-27 02:04:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 02:04:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 02:04:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3317 transitions. [2023-08-27 02:04:13,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30184730184730185 [2023-08-27 02:04:13,050 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3317 transitions. [2023-08-27 02:04:13,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3317 transitions. [2023-08-27 02:04:13,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:04:13,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3317 transitions. [2023-08-27 02:04:13,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 89.64864864864865) internal successors, (3317), 37 states have internal predecessors, (3317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:04:13,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 297.0) internal successors, (11286), 38 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:04:13,056 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 297.0) internal successors, (11286), 38 states have internal predecessors, (11286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:04:13,056 INFO L175 Difference]: Start difference. First operand has 630 places, 2674 transitions, 68168 flow. Second operand 37 states and 3317 transitions. [2023-08-27 02:04:13,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 666 places, 3007 transitions, 81510 flow [2023-08-27 02:04:19,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 645 places, 3007 transitions, 79485 flow, removed 835 selfloop flow, removed 21 redundant places. [2023-08-27 02:04:20,013 INFO L231 Difference]: Finished difference. Result has 655 places, 2913 transitions, 75984 flow [2023-08-27 02:04:20,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=66239, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=761, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=75984, PETRI_PLACES=655, PETRI_TRANSITIONS=2913} [2023-08-27 02:04:20,015 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 622 predicate places. [2023-08-27 02:04:20,015 INFO L495 AbstractCegarLoop]: Abstraction has has 655 places, 2913 transitions, 75984 flow [2023-08-27 02:04:20,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 85.3) internal successors, (2559), 30 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:04:20,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:04:20,015 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:04:20,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-27 02:04:20,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:04:20,216 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 02:04:20,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:04:20,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1213612064, now seen corresponding path program 6 times [2023-08-27 02:04:20,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:04:20,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759551026] [2023-08-27 02:04:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:04:20,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:04:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:04:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:04:21,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:04:21,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759551026] [2023-08-27 02:04:21,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759551026] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:04:21,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599607094] [2023-08-27 02:04:21,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 02:04:21,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:04:21,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:04:21,182 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:04:21,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-27 02:04:21,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 02:04:21,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:04:21,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 02:04:21,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:04:21,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 02:04:21,642 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 29 treesize of output 29 [2023-08-27 02:04:21,918 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:04:21,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:04:22,238 INFO L322 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2023-08-27 02:04:22,239 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 78 treesize of output 84 [2023-08-27 02:04:22,246 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:04:22,246 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 20 treesize of output 6 [2023-08-27 02:04:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:04:22,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599607094] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:04:22,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:04:22,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-27 02:04:22,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745027024] [2023-08-27 02:04:22,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:04:22,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-27 02:04:22,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:04:22,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-27 02:04:22,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1368, Unknown=1, NotChecked=0, Total=1640 [2023-08-27 02:04:22,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 02:04:22,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 655 places, 2913 transitions, 75984 flow. Second operand has 41 states, 41 states have (on average 88.17073170731707) internal successors, (3615), 41 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:04:22,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:04:22,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 02:04:22,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:04:49,556 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 [0] [2023-08-27 02:04:56,074 INFO L124 PetriNetUnfolderBase]: 10130/18564 cut-off events. [2023-08-27 02:04:56,074 INFO L125 PetriNetUnfolderBase]: For 604156/604156 co-relation queries the response was YES. [2023-08-27 02:04:56,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 238269 conditions, 18564 events. 10130/18564 cut-off events. For 604156/604156 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 155948 event pairs, 1223 based on Foata normal form. 858/18590 useless extension candidates. Maximal degree in co-relation 238117. Up to 8082 conditions per place. [2023-08-27 02:04:56,373 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 2089 selfloop transitions, 1947 changer transitions 62/4100 dead transitions. [2023-08-27 02:04:56,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 4100 transitions, 116325 flow [2023-08-27 02:04:56,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-08-27 02:04:56,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2023-08-27 02:04:56,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 10231 transitions. [2023-08-27 02:04:56,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31896121710936526 [2023-08-27 02:04:56,380 INFO L72 ComplementDD]: Start complementDD. Operand 108 states and 10231 transitions. [2023-08-27 02:04:56,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 108 states and 10231 transitions. [2023-08-27 02:04:56,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:04:56,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 108 states and 10231 transitions. [2023-08-27 02:04:56,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 109 states, 108 states have (on average 94.73148148148148) internal successors, (10231), 108 states have internal predecessors, (10231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:04:56,411 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 109 states, 109 states have (on average 297.0) internal successors, (32373), 109 states have internal predecessors, (32373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:04:56,415 INFO L81 ComplementDD]: Finished complementDD. Result has 109 states, 109 states have (on average 297.0) internal successors, (32373), 109 states have internal predecessors, (32373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:04:56,415 INFO L175 Difference]: Start difference. First operand has 655 places, 2913 transitions, 75984 flow. Second operand 108 states and 10231 transitions. [2023-08-27 02:04:56,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 4100 transitions, 116325 flow [2023-08-27 02:05:05,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 730 places, 4100 transitions, 113815 flow, removed 954 selfloop flow, removed 25 redundant places. [2023-08-27 02:05:05,702 INFO L231 Difference]: Finished difference. Result has 762 places, 3645 transitions, 107327 flow [2023-08-27 02:05:05,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=66102, PETRI_DIFFERENCE_MINUEND_PLACES=623, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=894, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=108, PETRI_FLOW=107327, PETRI_PLACES=762, PETRI_TRANSITIONS=3645} [2023-08-27 02:05:05,704 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 729 predicate places. [2023-08-27 02:05:05,704 INFO L495 AbstractCegarLoop]: Abstraction has has 762 places, 3645 transitions, 107327 flow [2023-08-27 02:05:05,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 88.17073170731707) internal successors, (3615), 41 states have internal predecessors, (3615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:05:05,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:05:05,704 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:05:05,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-27 02:05:05,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-27 02:05:05,905 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 02:05:05,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:05:05,905 INFO L85 PathProgramCache]: Analyzing trace with hash 237945814, now seen corresponding path program 7 times [2023-08-27 02:05:05,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:05:05,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165624805] [2023-08-27 02:05:05,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:05:05,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:05:05,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:05:07,209 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:05:07,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:05:07,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165624805] [2023-08-27 02:05:07,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165624805] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:05:07,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853073084] [2023-08-27 02:05:07,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 02:05:07,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:05:07,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:05:07,211 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:05:07,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-27 02:05:07,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:05:07,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-27 02:05:07,369 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:05:07,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 02:05:07,639 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 42 treesize of output 40 [2023-08-27 02:05:07,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:05:07,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:05:08,041 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse16 (* c_~q_front~0 4))) (let ((.cse4 (+ .cse16 c_~q~0.offset 8)) (.cse5 (+ .cse16 c_~q~0.offset 4)) (.cse3 (+ .cse16 c_~q~0.offset))) (and (forall ((v_ArrVal_2011 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2011) c_~q~0.base))) (let ((.cse0 (select .cse2 .cse5)) (.cse1 (select .cse2 .cse4))) (or (< 0 (+ .cse0 1)) (< 0 (+ c_~s~0 .cse0 2147483649 .cse1 (select .cse2 .cse3))) (< 0 (+ c_~s~0 .cse0 2147483650 .cse1)))))) (forall ((v_ArrVal_2011 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2011) c_~q~0.base))) (let ((.cse6 (select .cse8 .cse4)) (.cse7 (select .cse8 .cse3))) (or (< 0 (+ c_~s~0 2147483650 .cse6 .cse7)) (< 0 (+ c_~s~0 (select .cse8 .cse5) 2147483649 .cse6 .cse7)) (< 0 (+ .cse7 1)))))) (forall ((v_ArrVal_2011 (Array Int Int))) (let ((.cse10 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2011) c_~q~0.base))) (let ((.cse9 (select .cse10 .cse5)) (.cse11 (select .cse10 .cse3))) (or (< 0 (+ .cse9 1)) (< 0 (+ c_~s~0 .cse9 2147483649 (select .cse10 .cse4) .cse11)) (< 0 (+ .cse11 1)))))) (forall ((v_ArrVal_2011 (Array Int Int))) (let ((.cse15 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2011) c_~q~0.base))) (let ((.cse13 (select .cse15 .cse3)) (.cse14 (select .cse15 .cse5)) (.cse12 (select .cse15 .cse4))) (or (< 0 (+ c_~s~0 2147483650 .cse12 .cse13)) (< 0 (+ c_~s~0 .cse14 2147483649 .cse12 .cse13)) (< 0 (+ c_~s~0 .cse14 2147483650 .cse12)) (< 0 (+ c_~s~0 2147483651 .cse12))))))))) is different from false [2023-08-27 02:05:08,473 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:05:08,474 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 717 treesize of output 558 [2023-08-27 02:05:08,496 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:05:08,496 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 461 treesize of output 420 [2023-08-27 02:05:08,517 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:05:08,517 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 420 treesize of output 387 [2023-08-27 02:05:08,529 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:05:08,530 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 387 treesize of output 333 [2023-08-27 02:05:08,540 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:05:08,540 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 333 treesize of output 294 [2023-08-27 02:05:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:05:08,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853073084] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:05:08,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:05:08,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 31 [2023-08-27 02:05:08,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4795386] [2023-08-27 02:05:08,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:05:08,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 02:05:08,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:05:08,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 02:05:08,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=884, Unknown=1, NotChecked=60, Total=1056 [2023-08-27 02:05:08,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 02:05:08,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 762 places, 3645 transitions, 107327 flow. Second operand has 33 states, 33 states have (on average 85.27272727272727) internal successors, (2814), 33 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:05:08,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:05:08,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 02:05:08,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:05:29,770 INFO L124 PetriNetUnfolderBase]: 8638/15919 cut-off events. [2023-08-27 02:05:29,771 INFO L125 PetriNetUnfolderBase]: For 577005/577005 co-relation queries the response was YES. [2023-08-27 02:05:29,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 214235 conditions, 15919 events. 8638/15919 cut-off events. For 577005/577005 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 130861 event pairs, 292 based on Foata normal form. 840/16457 useless extension candidates. Maximal degree in co-relation 214056. Up to 7065 conditions per place. [2023-08-27 02:05:30,199 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 1422 selfloop transitions, 1973 changer transitions 0/3397 dead transitions. [2023-08-27 02:05:30,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 795 places, 3397 transitions, 106826 flow [2023-08-27 02:05:30,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 02:05:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 02:05:30,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3050 transitions. [2023-08-27 02:05:30,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30204000792236085 [2023-08-27 02:05:30,202 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3050 transitions. [2023-08-27 02:05:30,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3050 transitions. [2023-08-27 02:05:30,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:05:30,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3050 transitions. [2023-08-27 02:05:30,205 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 89.70588235294117) internal successors, (3050), 34 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:05:30,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 297.0) internal successors, (10395), 35 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:05:30,209 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 297.0) internal successors, (10395), 35 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:05:30,209 INFO L175 Difference]: Start difference. First operand has 762 places, 3645 transitions, 107327 flow. Second operand 34 states and 3050 transitions. [2023-08-27 02:05:30,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 795 places, 3397 transitions, 106826 flow [2023-08-27 02:05:41,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 781 places, 3397 transitions, 86406 flow, removed 9869 selfloop flow, removed 14 redundant places. [2023-08-27 02:05:41,511 INFO L231 Difference]: Finished difference. Result has 781 places, 3265 transitions, 81256 flow [2023-08-27 02:05:41,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=77310, PETRI_DIFFERENCE_MINUEND_PLACES=748, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1973, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=81256, PETRI_PLACES=781, PETRI_TRANSITIONS=3265} [2023-08-27 02:05:41,514 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 748 predicate places. [2023-08-27 02:05:41,514 INFO L495 AbstractCegarLoop]: Abstraction has has 781 places, 3265 transitions, 81256 flow [2023-08-27 02:05:41,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 85.27272727272727) internal successors, (2814), 33 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:05:41,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:05:41,514 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:05:41,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-27 02:05:41,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-27 02:05:41,721 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 02:05:41,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:05:41,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1022448129, now seen corresponding path program 9 times [2023-08-27 02:05:41,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:05:41,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131399034] [2023-08-27 02:05:41,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:05:41,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:05:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:05:42,401 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:05:42,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:05:42,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131399034] [2023-08-27 02:05:42,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131399034] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:05:42,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085932491] [2023-08-27 02:05:42,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 02:05:42,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:05:42,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:05:42,402 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:05:42,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-27 02:05:42,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 02:05:42,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:05:42,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 02:05:42,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:05:42,828 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 02:05:42,864 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 02:05:42,898 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 02:05:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:05:43,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:05:43,791 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:05:43,791 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 62 treesize of output 50 [2023-08-27 02:05:43,806 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 02:05:43,807 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 316 treesize of output 287 [2023-08-27 02:05:43,818 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 02:05:43,819 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 84 [2023-08-27 02:05:43,834 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 02:05:43,834 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 95 treesize of output 71 [2023-08-27 02:05:44,078 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:05:44,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085932491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:05:44,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:05:44,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 37 [2023-08-27 02:05:44,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545309258] [2023-08-27 02:05:44,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:05:44,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-27 02:05:44,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:05:44,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-27 02:05:44,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1220, Unknown=3, NotChecked=0, Total=1482 [2023-08-27 02:05:44,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 02:05:44,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 3265 transitions, 81256 flow. Second operand has 39 states, 39 states have (on average 85.25641025641026) internal successors, (3325), 39 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:05:44,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:05:44,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 02:05:44,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:06:00,815 INFO L124 PetriNetUnfolderBase]: 8110/15290 cut-off events. [2023-08-27 02:06:00,816 INFO L125 PetriNetUnfolderBase]: For 440055/440055 co-relation queries the response was YES. [2023-08-27 02:06:00,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174236 conditions, 15290 events. 8110/15290 cut-off events. For 440055/440055 co-relation queries the response was YES. Maximal size of possible extension queue 871. Compared 129612 event pairs, 1016 based on Foata normal form. 584/15180 useless extension candidates. Maximal degree in co-relation 174061. Up to 6250 conditions per place. [2023-08-27 02:06:01,078 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 1977 selfloop transitions, 1458 changer transitions 75/3512 dead transitions. [2023-08-27 02:06:01,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 815 places, 3512 transitions, 90537 flow [2023-08-27 02:06:01,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-27 02:06:01,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-27 02:06:01,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4894 transitions. [2023-08-27 02:06:01,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3051502681132311 [2023-08-27 02:06:01,082 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4894 transitions. [2023-08-27 02:06:01,082 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4894 transitions. [2023-08-27 02:06:01,082 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:06:01,082 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4894 transitions. [2023-08-27 02:06:01,085 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 90.62962962962963) internal successors, (4894), 54 states have internal predecessors, (4894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:06:01,092 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 297.0) internal successors, (16335), 55 states have internal predecessors, (16335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:06:01,092 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 297.0) internal successors, (16335), 55 states have internal predecessors, (16335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:06:01,092 INFO L175 Difference]: Start difference. First operand has 781 places, 3265 transitions, 81256 flow. Second operand 54 states and 4894 transitions. [2023-08-27 02:06:01,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 815 places, 3512 transitions, 90537 flow [2023-08-27 02:06:08,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 782 places, 3512 transitions, 86742 flow, removed 241 selfloop flow, removed 33 redundant places. [2023-08-27 02:06:08,327 INFO L231 Difference]: Finished difference. Result has 801 places, 3190 transitions, 81293 flow [2023-08-27 02:06:08,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=70306, PETRI_DIFFERENCE_MINUEND_PLACES=729, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2827, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1095, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1642, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=81293, PETRI_PLACES=801, PETRI_TRANSITIONS=3190} [2023-08-27 02:06:08,329 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 768 predicate places. [2023-08-27 02:06:08,329 INFO L495 AbstractCegarLoop]: Abstraction has has 801 places, 3190 transitions, 81293 flow [2023-08-27 02:06:08,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 85.25641025641026) internal successors, (3325), 39 states have internal predecessors, (3325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:06:08,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:06:08,330 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:06:08,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-27 02:06:08,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-27 02:06:08,535 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 02:06:08,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:06:08,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1855550814, now seen corresponding path program 5 times [2023-08-27 02:06:08,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:06:08,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125021139] [2023-08-27 02:06:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:06:08,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:06:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:06:08,952 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:06:08,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:06:08,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125021139] [2023-08-27 02:06:08,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125021139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:06:08,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191222149] [2023-08-27 02:06:08,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 02:06:08,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:06:08,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:06:08,953 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 02:06:08,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-27 02:06:09,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 02:06:09,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:06:09,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 84 conjunts are in the unsatisfiable core [2023-08-27 02:06:09,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:06:09,170 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 02:06:09,206 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 02:06:09,246 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 02:06:09,286 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 02:06:09,328 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 02:06:09,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 02:06:09,427 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 16 treesize of output 18 [2023-08-27 02:06:09,915 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:06:09,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:06:15,426 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:06:15,426 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 4 case distinctions, treesize of input 425 treesize of output 188 [2023-08-27 02:06:15,658 INFO L322 Elim1Store]: treesize reduction 66, result has 67.2 percent of original size [2023-08-27 02:06:15,659 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 426 treesize of output 493 [2023-08-27 02:06:15,729 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 02:06:15,735 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 02:06:15,739 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 02:06:15,739 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 02:06:15,742 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 02:06:15,806 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:06:15,807 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 335 treesize of output 341 [2023-08-27 02:06:16,017 INFO L322 Elim1Store]: treesize reduction 66, result has 67.2 percent of original size [2023-08-27 02:06:16,018 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 238 treesize of output 321 Received shutdown request... [2023-08-27 02:06:22,212 WARN L266 SmtUtils]: Removed 2 from assertion stack [2023-08-27 02:06:22,215 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 25 remaining) [2023-08-27 02:06:22,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-27 02:06:22,238 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 02:06:22,241 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 02:06:22,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-27 02:06:22,421 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. [2023-08-27 02:06:22,422 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 25 remaining) [2023-08-27 02:06:22,422 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 25 remaining) [2023-08-27 02:06:22,423 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 25 remaining) [2023-08-27 02:06:22,424 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 25 remaining) [2023-08-27 02:06:22,424 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 25 remaining) [2023-08-27 02:06:22,424 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 25 remaining) [2023-08-27 02:06:22,424 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 25 remaining) [2023-08-27 02:06:22,424 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 25 remaining) [2023-08-27 02:06:22,424 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 25 remaining) [2023-08-27 02:06:22,424 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 25 remaining) [2023-08-27 02:06:22,424 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 25 remaining) [2023-08-27 02:06:22,424 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 25 remaining) [2023-08-27 02:06:22,424 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (11 of 25 remaining) [2023-08-27 02:06:22,424 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 25 remaining) [2023-08-27 02:06:22,424 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 25 remaining) [2023-08-27 02:06:22,424 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 25 remaining) [2023-08-27 02:06:22,424 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 25 remaining) [2023-08-27 02:06:22,425 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 25 remaining) [2023-08-27 02:06:22,425 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 25 remaining) [2023-08-27 02:06:22,425 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 25 remaining) [2023-08-27 02:06:22,425 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 25 remaining) [2023-08-27 02:06:22,425 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 25 remaining) [2023-08-27 02:06:22,425 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 25 remaining) [2023-08-27 02:06:22,425 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 25 remaining) [2023-08-27 02:06:22,425 INFO L445 BasicCegarLoop]: Path program histogram: [15, 9, 7, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:06:22,429 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 02:06:22,429 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 02:06:22,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 02:06:22 BasicIcfg [2023-08-27 02:06:22,434 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 02:06:22,434 INFO L158 Benchmark]: Toolchain (without parser) took 797009.86ms. Allocated memory was 339.7MB in the beginning and 5.6GB in the end (delta: 5.2GB). Free memory was 315.2MB in the beginning and 4.0GB in the end (delta: -3.7GB). Peak memory consumption was 2.2GB. Max. memory is 16.0GB. [2023-08-27 02:06:22,434 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 339.7MB. Free memory was 317.5MB in the beginning and 317.3MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 02:06:22,434 INFO L158 Benchmark]: CACSL2BoogieTranslator took 278.72ms. Allocated memory is still 339.7MB. Free memory was 315.2MB in the beginning and 303.3MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-27 02:06:22,435 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.33ms. Allocated memory is still 339.7MB. Free memory was 303.3MB in the beginning and 301.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 02:06:22,435 INFO L158 Benchmark]: Boogie Preprocessor took 28.59ms. Allocated memory is still 339.7MB. Free memory was 301.2MB in the beginning and 299.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 02:06:22,435 INFO L158 Benchmark]: RCFGBuilder took 522.71ms. Allocated memory is still 339.7MB. Free memory was 299.8MB in the beginning and 269.7MB in the end (delta: 30.1MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-08-27 02:06:22,435 INFO L158 Benchmark]: TraceAbstraction took 796112.39ms. Allocated memory was 339.7MB in the beginning and 5.6GB in the end (delta: 5.2GB). Free memory was 269.0MB in the beginning and 4.0GB in the end (delta: -3.7GB). Peak memory consumption was 2.2GB. Max. memory is 16.0GB. [2023-08-27 02:06:22,436 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 339.7MB. Free memory was 317.5MB in the beginning and 317.3MB in the end (delta: 157.4kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 278.72ms. Allocated memory is still 339.7MB. Free memory was 315.2MB in the beginning and 303.3MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 60.33ms. Allocated memory is still 339.7MB. Free memory was 303.3MB in the beginning and 301.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 28.59ms. Allocated memory is still 339.7MB. Free memory was 301.2MB in the beginning and 299.8MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 522.71ms. Allocated memory is still 339.7MB. Free memory was 299.8MB in the beginning and 269.7MB in the end (delta: 30.1MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * TraceAbstraction took 796112.39ms. Allocated memory was 339.7MB in the beginning and 5.6GB in the end (delta: 5.2GB). Free memory was 269.0MB in the beginning and 4.0GB in the end (delta: -3.7GB). Peak memory consumption was 2.2GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.4s, 134 PlacesBefore, 33 PlacesAfterwards, 138 TransitionsBefore, 29 TransitionsAfterwards, 1192 CoEnabledTransitionPairs, 7 FixpointIterations, 82 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 7 ConcurrentYvCompositions, 8 ChoiceCompositions, 148 TotalNumberOfCompositions, 1644 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1364, independent: 1338, independent conditional: 0, independent unconditional: 1338, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 683, independent: 671, independent conditional: 0, independent unconditional: 671, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1364, independent: 667, independent conditional: 0, independent unconditional: 667, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 683, unknown conditional: 0, unknown unconditional: 683] , Statistics on independence cache: Total cache size (in pairs): 43, Positive cache size: 40, Positive conditional cache size: 0, Positive unconditional cache size: 40, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 4 for 6ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 174 locations, 25 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: 796.0s, OverallIterations: 59, TraceHistogramMax: 5, PathProgramHistogramMax: 15, EmptinessCheckTime: 0.0s, AutomataDifference: 544.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.6s, HoareTripleCheckerStatistics: 526 mSolverCounterUnknown, 7193 SdHoareTripleChecker+Valid, 199.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7193 mSDsluCounter, 39 SdHoareTripleChecker+Invalid, 194.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1588 IncrementalHoareTripleChecker+Unchecked, 32 mSDsCounter, 3792 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 44038 IncrementalHoareTripleChecker+Invalid, 49944 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3792 mSolverCounterUnsat, 7 mSDtfsCounter, 44038 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2630 GetRequests, 578 SyntacticMatches, 27 SemanticMatches, 2025 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 22925 ImplicationChecksByTransitivity, 172.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=107327occurred in iteration=56, InterpolantAutomatonStates: 1333, 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: 0.6s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 213.9s InterpolantComputationTime, 1457 NumberOfCodeBlocks, 1426 NumberOfCodeBlocksAsserted, 145 NumberOfCheckSat, 1911 ConstructedInterpolants, 203 QuantifiedInterpolants, 52710 SizeOfPredicates, 514 NumberOfNonLiveVariables, 10446 ConjunctsInSsa, 1622 ConjunctsInUnsatCore, 149 InterpolantComputations, 17 PerfectInterpolantSequences, 396/1476 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