/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 08:45:07,860 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 08:45:07,908 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 08:45:07,912 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 08:45:07,912 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 08:45:07,934 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 08:45:07,935 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 08:45:07,935 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 08:45:07,935 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 08:45:07,936 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 08:45:07,936 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 08:45:07,937 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 08:45:07,937 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 08:45:07,937 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 08:45:07,938 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 08:45:07,938 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 08:45:07,938 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 08:45:07,938 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 08:45:07,939 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 08:45:07,939 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 08:45:07,939 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 08:45:07,944 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 08:45:07,944 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 08:45:07,944 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 08:45:07,948 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 08:45:07,948 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 08:45:07,948 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 08:45:07,948 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:45:07,948 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 08:45:07,949 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 08:45:07,949 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 08:45:07,949 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 08:45:07,949 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 08:45:07,950 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 08:45:07,950 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 08:45:07,950 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 08:45:08,257 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 08:45:08,276 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 08:45:08,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 08:45:08,280 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 08:45:08,281 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 08:45:08,282 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-08-27 08:45:09,433 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 08:45:09,634 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 08:45:09,635 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-08-27 08:45:09,643 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4291806af/7e4535e80e074b968eca3913adf3e8b8/FLAG0f4a2f8e4 [2023-08-27 08:45:09,658 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4291806af/7e4535e80e074b968eca3913adf3e8b8 [2023-08-27 08:45:09,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 08:45:09,665 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 08:45:09,667 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 08:45:09,667 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 08:45:09,670 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 08:45:09,671 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:45:09" (1/1) ... [2023-08-27 08:45:09,672 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ea57491 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:45:09, skipping insertion in model container [2023-08-27 08:45:09,672 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:45:09" (1/1) ... [2023-08-27 08:45:09,694 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 08:45:09,877 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:45:09,886 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 08:45:09,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:45:09,919 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 08:45:09,919 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 08:45:09,925 INFO L206 MainTranslator]: Completed translation [2023-08-27 08:45:09,927 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:45:09 WrapperNode [2023-08-27 08:45:09,927 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 08:45:09,929 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 08:45:09,929 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 08:45:09,929 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 08:45:09,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:45:09" (1/1) ... [2023-08-27 08:45:09,949 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:45:09" (1/1) ... [2023-08-27 08:45:09,980 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 156 [2023-08-27 08:45:09,980 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 08:45:09,981 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 08:45:09,982 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 08:45:09,982 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 08:45:09,989 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:45:09" (1/1) ... [2023-08-27 08:45:09,989 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:45:09" (1/1) ... [2023-08-27 08:45:10,005 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:45:09" (1/1) ... [2023-08-27 08:45:10,006 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:45:09" (1/1) ... [2023-08-27 08:45:10,010 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:45:09" (1/1) ... [2023-08-27 08:45:10,013 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:45:09" (1/1) ... [2023-08-27 08:45:10,014 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:45:09" (1/1) ... [2023-08-27 08:45:10,015 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:45:09" (1/1) ... [2023-08-27 08:45:10,017 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 08:45:10,018 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 08:45:10,018 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 08:45:10,018 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 08:45:10,019 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:45:09" (1/1) ... [2023-08-27 08:45:10,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:45:10,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:10,045 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 08:45:10,049 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 08:45:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 08:45:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 08:45:10,073 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 08:45:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 08:45:10,073 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 08:45:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 08:45:10,073 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 08:45:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 08:45:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 08:45:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 08:45:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 08:45:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 08:45:10,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 08:45:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 08:45:10,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 08:45:10,076 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 08:45:10,161 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 08:45:10,163 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 08:45:10,400 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 08:45:10,648 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 08:45:10,648 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 08:45:10,650 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:45:10 BoogieIcfgContainer [2023-08-27 08:45:10,650 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 08:45:10,653 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 08:45:10,653 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 08:45:10,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 08:45:10,655 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 08:45:09" (1/3) ... [2023-08-27 08:45:10,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e01d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:45:10, skipping insertion in model container [2023-08-27 08:45:10,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:45:09" (2/3) ... [2023-08-27 08:45:10,656 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e01d7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:45:10, skipping insertion in model container [2023-08-27 08:45:10,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:45:10" (3/3) ... [2023-08-27 08:45:10,657 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-08-27 08:45:10,673 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 08:45:10,674 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-27 08:45:10,674 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 08:45:10,754 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 08:45:10,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 128 transitions, 272 flow [2023-08-27 08:45:10,865 INFO L124 PetriNetUnfolderBase]: 9/126 cut-off events. [2023-08-27 08:45:10,866 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:45:10,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 9/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 131 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-27 08:45:10,871 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 128 transitions, 272 flow [2023-08-27 08:45:10,875 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 117 transitions, 246 flow [2023-08-27 08:45:10,878 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 08:45:10,890 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 117 transitions, 246 flow [2023-08-27 08:45:10,893 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 117 transitions, 246 flow [2023-08-27 08:45:10,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 246 flow [2023-08-27 08:45:10,934 INFO L124 PetriNetUnfolderBase]: 9/117 cut-off events. [2023-08-27 08:45:10,934 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:45:10,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 128 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-27 08:45:10,936 INFO L119 LiptonReduction]: Number of co-enabled transitions 904 [2023-08-27 08:45:15,521 INFO L134 LiptonReduction]: Checked pairs total: 1487 [2023-08-27 08:45:15,521 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-27 08:45:15,531 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 08:45:15,536 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;@1714b0ba, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 08:45:15,536 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2023-08-27 08:45:15,538 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 08:45:15,538 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-08-27 08:45:15,538 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 08:45:15,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:15,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 08:45:15,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:15,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:15,543 INFO L85 PathProgramCache]: Analyzing trace with hash 20985, now seen corresponding path program 1 times [2023-08-27 08:45:15,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:15,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91501901] [2023-08-27 08:45:15,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:15,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:15,723 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 08:45:15,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:15,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91501901] [2023-08-27 08:45:15,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91501901] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:45:15,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:45:15,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:45:15,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372970903] [2023-08-27 08:45:15,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:45:15,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:45:15,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:15,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:45:15,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:45:15,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 261 [2023-08-27 08:45:15,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:15,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:15,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 261 [2023-08-27 08:45:15,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:15,879 INFO L124 PetriNetUnfolderBase]: 95/170 cut-off events. [2023-08-27 08:45:15,880 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-27 08:45:15,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 170 events. 95/170 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 519 event pairs, 69 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 300. Up to 170 conditions per place. [2023-08-27 08:45:15,882 INFO L140 encePairwiseOnDemand]: 250/261 looper letters, 22 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2023-08-27 08:45:15,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 112 flow [2023-08-27 08:45:15,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:45:15,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:45:15,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-08-27 08:45:15,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099616858237548 [2023-08-27 08:45:15,895 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-08-27 08:45:15,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-08-27 08:45:15,897 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:15,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-08-27 08:45:15,902 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:15,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:15,907 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:15,908 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 70 flow. Second operand 3 states and 321 transitions. [2023-08-27 08:45:15,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 112 flow [2023-08-27 08:45:15,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 25 transitions, 104 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 08:45:15,912 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 71 flow [2023-08-27 08:45:15,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-08-27 08:45:15,916 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -7 predicate places. [2023-08-27 08:45:15,916 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 71 flow [2023-08-27 08:45:15,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:15,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:15,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 08:45:15,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 08:45:15,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:15,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:15,918 INFO L85 PathProgramCache]: Analyzing trace with hash 651339, now seen corresponding path program 1 times [2023-08-27 08:45:15,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:15,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848890421] [2023-08-27 08:45:15,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:15,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:16,031 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 08:45:16,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:16,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848890421] [2023-08-27 08:45:16,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848890421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:16,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508622459] [2023-08-27 08:45:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:16,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:16,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:16,037 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 08:45:16,070 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 08:45:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:16,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:45:16,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:16,202 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 08:45:16,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:16,221 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 08:45:16,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508622459] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:16,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:16,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 08:45:16,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544715828] [2023-08-27 08:45:16,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:16,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:45:16,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:16,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:45:16,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 08:45:16,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 261 [2023-08-27 08:45:16,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 71 flow. Second operand has 7 states, 7 states have (on average 97.14285714285714) internal successors, (680), 7 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:16,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:16,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 261 [2023-08-27 08:45:16,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:16,322 INFO L124 PetriNetUnfolderBase]: 101/179 cut-off events. [2023-08-27 08:45:16,322 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 08:45:16,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 179 events. 101/179 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 551 event pairs, 69 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 333. Up to 172 conditions per place. [2023-08-27 08:45:16,324 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 21 selfloop transitions, 13 changer transitions 0/34 dead transitions. [2023-08-27 08:45:16,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 175 flow [2023-08-27 08:45:16,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:45:16,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:45:16,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 709 transitions. [2023-08-27 08:45:16,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880678708264915 [2023-08-27 08:45:16,329 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 709 transitions. [2023-08-27 08:45:16,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 709 transitions. [2023-08-27 08:45:16,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:16,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 709 transitions. [2023-08-27 08:45:16,331 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 101.28571428571429) internal successors, (709), 7 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:16,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:16,336 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:16,336 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 71 flow. Second operand 7 states and 709 transitions. [2023-08-27 08:45:16,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 175 flow [2023-08-27 08:45:16,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 170 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 08:45:16,338 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 150 flow [2023-08-27 08:45:16,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-08-27 08:45:16,339 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 1 predicate places. [2023-08-27 08:45:16,339 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 150 flow [2023-08-27 08:45:16,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 97.14285714285714) internal successors, (680), 7 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:16,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:16,340 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-27 08:45:16,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 08:45:16,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:16,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:16,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:16,546 INFO L85 PathProgramCache]: Analyzing trace with hash 20192312, now seen corresponding path program 1 times [2023-08-27 08:45:16,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:16,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756073129] [2023-08-27 08:45:16,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:16,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:16,671 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:45:16,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:16,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756073129] [2023-08-27 08:45:16,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756073129] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:16,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026671025] [2023-08-27 08:45:16,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:16,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:16,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:16,677 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 08:45:16,691 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 08:45:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:16,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 08:45:16,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:45:16,765 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:45:16,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026671025] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:45:16,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:45:16,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 08:45:16,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862522177] [2023-08-27 08:45:16,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:45:16,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:45:16,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:16,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:45:16,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:45:16,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 261 [2023-08-27 08:45:16,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:16,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:16,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 261 [2023-08-27 08:45:16,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:16,867 INFO L124 PetriNetUnfolderBase]: 98/175 cut-off events. [2023-08-27 08:45:16,867 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-27 08:45:16,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 175 events. 98/175 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 525 event pairs, 69 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 359. Up to 169 conditions per place. [2023-08-27 08:45:16,869 INFO L140 encePairwiseOnDemand]: 257/261 looper letters, 22 selfloop transitions, 8 changer transitions 0/30 dead transitions. [2023-08-27 08:45:16,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 183 flow [2023-08-27 08:45:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:45:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:45:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 508 transitions. [2023-08-27 08:45:16,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.389272030651341 [2023-08-27 08:45:16,871 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 508 transitions. [2023-08-27 08:45:16,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 508 transitions. [2023-08-27 08:45:16,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:16,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 508 transitions. [2023-08-27 08:45:16,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.6) internal successors, (508), 5 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:16,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:16,876 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:16,876 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 150 flow. Second operand 5 states and 508 transitions. [2023-08-27 08:45:16,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 183 flow [2023-08-27 08:45:16,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 162 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 08:45:16,878 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 118 flow [2023-08-27 08:45:16,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-27 08:45:16,879 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-08-27 08:45:16,879 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 118 flow [2023-08-27 08:45:16,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:16,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:16,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 08:45:16,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 08:45:17,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-27 08:45:17,086 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:17,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:17,087 INFO L85 PathProgramCache]: Analyzing trace with hash 20179508, now seen corresponding path program 1 times [2023-08-27 08:45:17,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:17,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674002897] [2023-08-27 08:45:17,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:17,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:17,145 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 08:45:17,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:17,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674002897] [2023-08-27 08:45:17,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674002897] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:45:17,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:45:17,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:45:17,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501175648] [2023-08-27 08:45:17,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:45:17,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:45:17,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:17,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:45:17,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:45:17,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 261 [2023-08-27 08:45:17,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:17,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:17,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 261 [2023-08-27 08:45:17,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:17,217 INFO L124 PetriNetUnfolderBase]: 112/207 cut-off events. [2023-08-27 08:45:17,217 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-27 08:45:17,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 207 events. 112/207 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 745 event pairs, 33 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 426. Up to 169 conditions per place. [2023-08-27 08:45:17,219 INFO L140 encePairwiseOnDemand]: 252/261 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-27 08:45:17,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 221 flow [2023-08-27 08:45:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:45:17,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:45:17,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-08-27 08:45:17,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2023-08-27 08:45:17,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-08-27 08:45:17,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-08-27 08:45:17,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:17,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-08-27 08:45:17,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:17,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:17,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:17,226 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 118 flow. Second operand 3 states and 342 transitions. [2023-08-27 08:45:17,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 221 flow [2023-08-27 08:45:17,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 209 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 08:45:17,230 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 130 flow [2023-08-27 08:45:17,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-27 08:45:17,232 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-08-27 08:45:17,234 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 130 flow [2023-08-27 08:45:17,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:17,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:17,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 08:45:17,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 08:45:17,240 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:17,241 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:17,241 INFO L85 PathProgramCache]: Analyzing trace with hash 625565178, now seen corresponding path program 1 times [2023-08-27 08:45:17,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:17,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631209133] [2023-08-27 08:45:17,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:17,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:17,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:17,301 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 08:45:17,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:17,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631209133] [2023-08-27 08:45:17,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631209133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:45:17,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:45:17,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:45:17,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708127] [2023-08-27 08:45:17,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:45:17,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:45:17,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:17,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:45:17,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:45:17,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 261 [2023-08-27 08:45:17,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:17,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:17,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 261 [2023-08-27 08:45:17,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:17,385 INFO L124 PetriNetUnfolderBase]: 136/249 cut-off events. [2023-08-27 08:45:17,385 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-27 08:45:17,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 249 events. 136/249 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 856 event pairs, 47 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 626. Up to 149 conditions per place. [2023-08-27 08:45:17,388 INFO L140 encePairwiseOnDemand]: 255/261 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-27 08:45:17,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 42 transitions, 246 flow [2023-08-27 08:45:17,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:45:17,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:45:17,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-08-27 08:45:17,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342273307790549 [2023-08-27 08:45:17,389 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-08-27 08:45:17,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-08-27 08:45:17,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:17,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-08-27 08:45:17,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:17,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:17,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:17,393 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 130 flow. Second operand 3 states and 340 transitions. [2023-08-27 08:45:17,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 42 transitions, 246 flow [2023-08-27 08:45:17,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:45:17,395 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 148 flow [2023-08-27 08:45:17,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-27 08:45:17,396 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-08-27 08:45:17,396 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 148 flow [2023-08-27 08:45:17,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:17,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:17,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 08:45:17,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 08:45:17,397 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:17,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:17,397 INFO L85 PathProgramCache]: Analyzing trace with hash 625565175, now seen corresponding path program 1 times [2023-08-27 08:45:17,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:17,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057512770] [2023-08-27 08:45:17,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:17,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:17,440 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 08:45:17,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:17,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057512770] [2023-08-27 08:45:17,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057512770] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:17,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839924505] [2023-08-27 08:45:17,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:17,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:17,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:17,442 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 08:45:17,463 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 08:45:17,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:17,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 08:45:17,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:17,570 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 08:45:17,570 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:45:17,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839924505] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:45:17,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:45:17,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2] total 5 [2023-08-27 08:45:17,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651210872] [2023-08-27 08:45:17,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:45:17,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:45:17,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:17,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:45:17,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:45:17,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 261 [2023-08-27 08:45:17,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:17,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:17,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 261 [2023-08-27 08:45:17,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:17,648 INFO L124 PetriNetUnfolderBase]: 144/276 cut-off events. [2023-08-27 08:45:17,648 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-08-27 08:45:17,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 790 conditions, 276 events. 144/276 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1016 event pairs, 112 based on Foata normal form. 6/218 useless extension candidates. Maximal degree in co-relation 756. Up to 248 conditions per place. [2023-08-27 08:45:17,651 INFO L140 encePairwiseOnDemand]: 257/261 looper letters, 39 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2023-08-27 08:45:17,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 256 flow [2023-08-27 08:45:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:45:17,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:45:17,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2023-08-27 08:45:17,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36302681992337166 [2023-08-27 08:45:17,653 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2023-08-27 08:45:17,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2023-08-27 08:45:17,653 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:17,653 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2023-08-27 08:45:17,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:17,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:17,656 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:17,656 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 148 flow. Second operand 4 states and 379 transitions. [2023-08-27 08:45:17,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 256 flow [2023-08-27 08:45:17,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 42 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:45:17,659 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 155 flow [2023-08-27 08:45:17,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-08-27 08:45:17,661 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-27 08:45:17,662 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 155 flow [2023-08-27 08:45:17,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:17,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:17,662 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 08:45:17,671 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 08:45:17,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:17,868 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:17,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:17,868 INFO L85 PathProgramCache]: Analyzing trace with hash -2069997959, now seen corresponding path program 2 times [2023-08-27 08:45:17,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:17,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596498322] [2023-08-27 08:45:17,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:17,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:17,935 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 08:45:17,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:17,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596498322] [2023-08-27 08:45:17,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596498322] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:17,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314908729] [2023-08-27 08:45:17,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:45:17,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:17,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:17,937 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 08:45:17,961 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 08:45:18,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:45:18,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:45:18,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:45:18,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:18,026 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 08:45:18,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:45:18,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314908729] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:45:18,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:45:18,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 08:45:18,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415765354] [2023-08-27 08:45:18,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:45:18,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:45:18,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:18,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:45:18,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:45:18,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 261 [2023-08-27 08:45:18,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:18,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:18,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 261 [2023-08-27 08:45:18,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:18,073 INFO L124 PetriNetUnfolderBase]: 144/275 cut-off events. [2023-08-27 08:45:18,073 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-08-27 08:45:18,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 275 events. 144/275 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 995 event pairs, 112 based on Foata normal form. 1/212 useless extension candidates. Maximal degree in co-relation 755. Up to 275 conditions per place. [2023-08-27 08:45:18,075 INFO L140 encePairwiseOnDemand]: 259/261 looper letters, 30 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-27 08:45:18,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 31 transitions, 207 flow [2023-08-27 08:45:18,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:45:18,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:45:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-08-27 08:45:18,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997445721583653 [2023-08-27 08:45:18,077 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-08-27 08:45:18,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-08-27 08:45:18,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:18,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-08-27 08:45:18,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:18,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:18,079 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:18,079 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 155 flow. Second operand 3 states and 313 transitions. [2023-08-27 08:45:18,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 31 transitions, 207 flow [2023-08-27 08:45:18,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 186 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-27 08:45:18,081 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 126 flow [2023-08-27 08:45:18,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=33, 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=126, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-27 08:45:18,081 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-08-27 08:45:18,082 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 126 flow [2023-08-27 08:45:18,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:18,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:18,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 08:45:18,090 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 08:45:18,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:18,288 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:18,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:18,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2070395290, now seen corresponding path program 1 times [2023-08-27 08:45:18,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:18,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381765607] [2023-08-27 08:45:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:18,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:18,327 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 08:45:18,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:18,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381765607] [2023-08-27 08:45:18,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381765607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:45:18,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:45:18,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:45:18,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489200981] [2023-08-27 08:45:18,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:45:18,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:45:18,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:18,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:45:18,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:45:18,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 261 [2023-08-27 08:45:18,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:18,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:18,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 261 [2023-08-27 08:45:18,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:18,408 INFO L124 PetriNetUnfolderBase]: 136/261 cut-off events. [2023-08-27 08:45:18,409 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-08-27 08:45:18,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 261 events. 136/261 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 948 event pairs, 56 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 717. Up to 147 conditions per place. [2023-08-27 08:45:18,410 INFO L140 encePairwiseOnDemand]: 258/261 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-27 08:45:18,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 230 flow [2023-08-27 08:45:18,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:45:18,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:45:18,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-08-27 08:45:18,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278416347381865 [2023-08-27 08:45:18,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-08-27 08:45:18,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-08-27 08:45:18,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:18,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-08-27 08:45:18,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:18,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:18,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:18,415 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 126 flow. Second operand 3 states and 335 transitions. [2023-08-27 08:45:18,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 230 flow [2023-08-27 08:45:18,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:45:18,416 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 133 flow [2023-08-27 08:45:18,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-08-27 08:45:18,417 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-08-27 08:45:18,417 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 133 flow [2023-08-27 08:45:18,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:18,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:18,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 08:45:18,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 08:45:18,418 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:18,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:18,418 INFO L85 PathProgramCache]: Analyzing trace with hash -2070395291, now seen corresponding path program 1 times [2023-08-27 08:45:18,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:18,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836358635] [2023-08-27 08:45:18,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:18,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:18,461 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 08:45:18,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:18,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836358635] [2023-08-27 08:45:18,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836358635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:18,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235008176] [2023-08-27 08:45:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:18,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:18,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:18,463 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 08:45:18,469 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 08:45:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:18,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:45:18,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:18,557 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 08:45:18,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:18,571 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 08:45:18,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235008176] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:18,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:18,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 08:45:18,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970153179] [2023-08-27 08:45:18,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:18,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:45:18,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:18,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:45:18,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 08:45:18,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 261 [2023-08-27 08:45:18,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 133 flow. Second operand has 7 states, 7 states have (on average 104.42857142857143) internal successors, (731), 7 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:18,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:18,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 261 [2023-08-27 08:45:18,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:18,730 INFO L124 PetriNetUnfolderBase]: 352/649 cut-off events. [2023-08-27 08:45:18,730 INFO L125 PetriNetUnfolderBase]: For 268/268 co-relation queries the response was YES. [2023-08-27 08:45:18,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1882 conditions, 649 events. 352/649 cut-off events. For 268/268 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2996 event pairs, 72 based on Foata normal form. 12/567 useless extension candidates. Maximal degree in co-relation 1867. Up to 283 conditions per place. [2023-08-27 08:45:18,734 INFO L140 encePairwiseOnDemand]: 254/261 looper letters, 79 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2023-08-27 08:45:18,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 93 transitions, 552 flow [2023-08-27 08:45:18,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:45:18,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:45:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 808 transitions. [2023-08-27 08:45:18,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422550629447181 [2023-08-27 08:45:18,737 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 808 transitions. [2023-08-27 08:45:18,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 808 transitions. [2023-08-27 08:45:18,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:18,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 808 transitions. [2023-08-27 08:45:18,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.42857142857143) internal successors, (808), 7 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:18,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:18,742 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:18,742 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 133 flow. Second operand 7 states and 808 transitions. [2023-08-27 08:45:18,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 93 transitions, 552 flow [2023-08-27 08:45:18,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 93 transitions, 542 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:45:18,744 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 278 flow [2023-08-27 08:45:18,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-27 08:45:18,745 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 13 predicate places. [2023-08-27 08:45:18,745 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 278 flow [2023-08-27 08:45:18,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.42857142857143) internal successors, (731), 7 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:18,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:18,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:18,752 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 08:45:18,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:18,952 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:18,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:18,952 INFO L85 PathProgramCache]: Analyzing trace with hash 893652309, now seen corresponding path program 1 times [2023-08-27 08:45:18,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:18,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147927117] [2023-08-27 08:45:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:18,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:19,032 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 08:45:19,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:19,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147927117] [2023-08-27 08:45:19,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147927117] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:19,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393656842] [2023-08-27 08:45:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:19,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:19,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:19,036 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 08:45:19,056 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 08:45:19,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:19,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 08:45:19,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:19,153 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 08:45:19,153 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:45:19,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393656842] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:45:19,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:45:19,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-27 08:45:19,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097566664] [2023-08-27 08:45:19,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:45:19,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:45:19,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:19,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:45:19,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:45:19,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 261 [2023-08-27 08:45:19,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:19,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:19,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 261 [2023-08-27 08:45:19,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:19,245 INFO L124 PetriNetUnfolderBase]: 277/536 cut-off events. [2023-08-27 08:45:19,246 INFO L125 PetriNetUnfolderBase]: For 927/927 co-relation queries the response was YES. [2023-08-27 08:45:19,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1883 conditions, 536 events. 277/536 cut-off events. For 927/927 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2429 event pairs, 122 based on Foata normal form. 64/600 useless extension candidates. Maximal degree in co-relation 1863. Up to 325 conditions per place. [2023-08-27 08:45:19,249 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 44 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2023-08-27 08:45:19,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 48 transitions, 374 flow [2023-08-27 08:45:19,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:45:19,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:45:19,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 435 transitions. [2023-08-27 08:45:19,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-27 08:45:19,251 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 435 transitions. [2023-08-27 08:45:19,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 435 transitions. [2023-08-27 08:45:19,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:19,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 435 transitions. [2023-08-27 08:45:19,252 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 08:45:19,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:19,254 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:19,254 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 278 flow. Second operand 4 states and 435 transitions. [2023-08-27 08:45:19,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 48 transitions, 374 flow [2023-08-27 08:45:19,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 48 transitions, 364 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-27 08:45:19,257 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 236 flow [2023-08-27 08:45:19,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=236, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-27 08:45:19,257 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 12 predicate places. [2023-08-27 08:45:19,258 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 236 flow [2023-08-27 08:45:19,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:19,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:19,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:19,276 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 08:45:19,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:19,472 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:19,472 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:19,472 INFO L85 PathProgramCache]: Analyzing trace with hash 896275841, now seen corresponding path program 1 times [2023-08-27 08:45:19,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:19,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341399833] [2023-08-27 08:45:19,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:19,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:19,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:19,537 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 08:45:19,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:19,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341399833] [2023-08-27 08:45:19,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341399833] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:19,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040742115] [2023-08-27 08:45:19,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:19,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:19,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:19,539 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 08:45:19,541 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 08:45:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:19,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 08:45:19,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:19,681 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 08:45:19,682 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:19,715 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 08:45:19,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040742115] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:19,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:19,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 7 [2023-08-27 08:45:19,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020827736] [2023-08-27 08:45:19,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:19,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 08:45:19,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:19,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 08:45:19,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-08-27 08:45:19,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 261 [2023-08-27 08:45:19,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 236 flow. Second operand has 9 states, 9 states have (on average 103.44444444444444) internal successors, (931), 9 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:19,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:19,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 261 [2023-08-27 08:45:19,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:19,888 INFO L124 PetriNetUnfolderBase]: 377/734 cut-off events. [2023-08-27 08:45:19,888 INFO L125 PetriNetUnfolderBase]: For 1244/1244 co-relation queries the response was YES. [2023-08-27 08:45:19,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 734 events. 377/734 cut-off events. For 1244/1244 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3577 event pairs, 70 based on Foata normal form. 78/812 useless extension candidates. Maximal degree in co-relation 2415. Up to 312 conditions per place. [2023-08-27 08:45:19,893 INFO L140 encePairwiseOnDemand]: 255/261 looper letters, 91 selfloop transitions, 16 changer transitions 0/107 dead transitions. [2023-08-27 08:45:19,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 107 transitions, 705 flow [2023-08-27 08:45:19,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 08:45:19,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 08:45:19,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1002 transitions. [2023-08-27 08:45:19,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42656449553001274 [2023-08-27 08:45:19,896 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1002 transitions. [2023-08-27 08:45:19,896 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1002 transitions. [2023-08-27 08:45:19,896 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:19,897 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1002 transitions. [2023-08-27 08:45:19,898 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 111.33333333333333) internal successors, (1002), 9 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:19,901 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 261.0) internal successors, (2610), 10 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:19,902 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 261.0) internal successors, (2610), 10 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:19,902 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 236 flow. Second operand 9 states and 1002 transitions. [2023-08-27 08:45:19,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 107 transitions, 705 flow [2023-08-27 08:45:19,905 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 107 transitions, 699 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:45:19,906 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 395 flow [2023-08-27 08:45:19,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=395, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-27 08:45:19,907 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 21 predicate places. [2023-08-27 08:45:19,907 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 395 flow [2023-08-27 08:45:19,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 103.44444444444444) internal successors, (931), 9 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:19,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:19,907 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-27 08:45:19,919 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 08:45:20,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:20,113 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:20,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:20,114 INFO L85 PathProgramCache]: Analyzing trace with hash 879740035, now seen corresponding path program 2 times [2023-08-27 08:45:20,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:20,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069168403] [2023-08-27 08:45:20,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:20,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:20,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:45:20,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:20,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069168403] [2023-08-27 08:45:20,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069168403] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:20,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146595958] [2023-08-27 08:45:20,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:45:20,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:20,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:20,253 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 08:45:20,277 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 08:45:20,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:45:20,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:45:20,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 08:45:20,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-27 08:45:20,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:45:20,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146595958] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:45:20,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:45:20,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-27 08:45:20,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732687993] [2023-08-27 08:45:20,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:45:20,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:45:20,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:20,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:45:20,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-27 08:45:20,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 261 [2023-08-27 08:45:20,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 395 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:20,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:20,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 261 [2023-08-27 08:45:20,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:20,486 INFO L124 PetriNetUnfolderBase]: 321/632 cut-off events. [2023-08-27 08:45:20,486 INFO L125 PetriNetUnfolderBase]: For 1959/1959 co-relation queries the response was YES. [2023-08-27 08:45:20,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 632 events. 321/632 cut-off events. For 1959/1959 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3020 event pairs, 239 based on Foata normal form. 38/670 useless extension candidates. Maximal degree in co-relation 2278. Up to 632 conditions per place. [2023-08-27 08:45:20,490 INFO L140 encePairwiseOnDemand]: 258/261 looper letters, 45 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-27 08:45:20,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 461 flow [2023-08-27 08:45:20,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:45:20,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:45:20,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2023-08-27 08:45:20,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40357598978288634 [2023-08-27 08:45:20,492 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2023-08-27 08:45:20,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2023-08-27 08:45:20,492 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:20,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2023-08-27 08:45:20,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:20,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:20,495 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:20,495 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 395 flow. Second operand 3 states and 316 transitions. [2023-08-27 08:45:20,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 461 flow [2023-08-27 08:45:20,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 46 transitions, 420 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-08-27 08:45:20,499 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 330 flow [2023-08-27 08:45:20,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-27 08:45:20,500 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 18 predicate places. [2023-08-27 08:45:20,500 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 330 flow [2023-08-27 08:45:20,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:20,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:20,501 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:20,509 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 08:45:20,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-27 08:45:20,707 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:20,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:20,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1967214215, now seen corresponding path program 2 times [2023-08-27 08:45:20,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:20,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963645065] [2023-08-27 08:45:20,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:20,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:45:20,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:20,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963645065] [2023-08-27 08:45:20,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963645065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:20,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096304320] [2023-08-27 08:45:20,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:45:20,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:20,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:20,819 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 08:45:20,821 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 08:45:20,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:45:20,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:45:20,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 08:45:20,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:45:21,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:45:21,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096304320] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:21,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:21,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-27 08:45:21,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567895181] [2023-08-27 08:45:21,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:21,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 08:45:21,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:21,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 08:45:21,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-08-27 08:45:21,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 261 [2023-08-27 08:45:21,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 330 flow. Second operand has 14 states, 14 states have (on average 87.92857142857143) internal successors, (1231), 14 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:21,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:21,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 261 [2023-08-27 08:45:21,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:21,316 INFO L124 PetriNetUnfolderBase]: 355/717 cut-off events. [2023-08-27 08:45:21,316 INFO L125 PetriNetUnfolderBase]: For 1435/1435 co-relation queries the response was YES. [2023-08-27 08:45:21,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2422 conditions, 717 events. 355/717 cut-off events. For 1435/1435 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3579 event pairs, 248 based on Foata normal form. 10/727 useless extension candidates. Maximal degree in co-relation 2399. Up to 602 conditions per place. [2023-08-27 08:45:21,321 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 77 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2023-08-27 08:45:21,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 84 transitions, 605 flow [2023-08-27 08:45:21,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 08:45:21,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 08:45:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 749 transitions. [2023-08-27 08:45:21,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3587164750957854 [2023-08-27 08:45:21,324 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 749 transitions. [2023-08-27 08:45:21,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 749 transitions. [2023-08-27 08:45:21,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:21,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 749 transitions. [2023-08-27 08:45:21,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 93.625) internal successors, (749), 8 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:21,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 261.0) internal successors, (2349), 9 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:21,329 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 261.0) internal successors, (2349), 9 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:21,329 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 330 flow. Second operand 8 states and 749 transitions. [2023-08-27 08:45:21,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 84 transitions, 605 flow [2023-08-27 08:45:21,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 84 transitions, 604 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:45:21,335 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 378 flow [2023-08-27 08:45:21,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=378, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2023-08-27 08:45:21,335 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 27 predicate places. [2023-08-27 08:45:21,335 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 378 flow [2023-08-27 08:45:21,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 87.92857142857143) internal successors, (1231), 14 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:21,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:21,336 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:21,344 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 08:45:21,541 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,SelfDestructingSolverStorable12 [2023-08-27 08:45:21,542 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:21,542 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:21,542 INFO L85 PathProgramCache]: Analyzing trace with hash -2087903975, now seen corresponding path program 3 times [2023-08-27 08:45:21,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:21,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434118292] [2023-08-27 08:45:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:21,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:21,717 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:45:21,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:21,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434118292] [2023-08-27 08:45:21,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434118292] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:21,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845224831] [2023-08-27 08:45:21,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:45:21,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:21,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:21,719 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 08:45:21,724 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 08:45:21,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:45:21,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:45:21,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:45:21,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:45:21,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:21,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:45:21,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845224831] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:21,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:21,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 2, 2] total 10 [2023-08-27 08:45:21,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206530053] [2023-08-27 08:45:21,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:21,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 08:45:21,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:21,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 08:45:21,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-08-27 08:45:21,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 261 [2023-08-27 08:45:21,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 378 flow. Second operand has 11 states, 11 states have (on average 88.0) internal successors, (968), 11 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:21,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:21,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 261 [2023-08-27 08:45:21,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:22,162 INFO L124 PetriNetUnfolderBase]: 388/805 cut-off events. [2023-08-27 08:45:22,162 INFO L125 PetriNetUnfolderBase]: For 1884/1884 co-relation queries the response was YES. [2023-08-27 08:45:22,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2599 conditions, 805 events. 388/805 cut-off events. For 1884/1884 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4130 event pairs, 195 based on Foata normal form. 40/845 useless extension candidates. Maximal degree in co-relation 2572. Up to 538 conditions per place. [2023-08-27 08:45:22,167 INFO L140 encePairwiseOnDemand]: 254/261 looper letters, 94 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2023-08-27 08:45:22,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 107 transitions, 755 flow [2023-08-27 08:45:22,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 08:45:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 08:45:22,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1118 transitions. [2023-08-27 08:45:22,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3569604086845466 [2023-08-27 08:45:22,171 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1118 transitions. [2023-08-27 08:45:22,171 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1118 transitions. [2023-08-27 08:45:22,171 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:22,172 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1118 transitions. [2023-08-27 08:45:22,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.16666666666667) internal successors, (1118), 12 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:22,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 261.0) internal successors, (3393), 13 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:22,178 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 261.0) internal successors, (3393), 13 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:22,179 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 378 flow. Second operand 12 states and 1118 transitions. [2023-08-27 08:45:22,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 107 transitions, 755 flow [2023-08-27 08:45:22,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 107 transitions, 719 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-08-27 08:45:22,184 INFO L231 Difference]: Finished difference. Result has 68 places, 50 transitions, 406 flow [2023-08-27 08:45:22,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=406, PETRI_PLACES=68, PETRI_TRANSITIONS=50} [2023-08-27 08:45:22,185 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 35 predicate places. [2023-08-27 08:45:22,185 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 50 transitions, 406 flow [2023-08-27 08:45:22,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 88.0) internal successors, (968), 11 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:22,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:22,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:22,193 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 08:45:22,391 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,SelfDestructingSolverStorable13 [2023-08-27 08:45:22,391 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:22,392 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:22,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1476759344, now seen corresponding path program 1 times [2023-08-27 08:45:22,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:22,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017238118] [2023-08-27 08:45:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:22,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:22,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:22,450 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 08:45:22,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:22,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017238118] [2023-08-27 08:45:22,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017238118] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:45:22,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:45:22,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:45:22,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456728840] [2023-08-27 08:45:22,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:45:22,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:45:22,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:22,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:45:22,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:45:22,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 261 [2023-08-27 08:45:22,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 50 transitions, 406 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:22,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:22,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 261 [2023-08-27 08:45:22,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:22,569 INFO L124 PetriNetUnfolderBase]: 388/794 cut-off events. [2023-08-27 08:45:22,569 INFO L125 PetriNetUnfolderBase]: For 1618/1618 co-relation queries the response was YES. [2023-08-27 08:45:22,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 794 events. 388/794 cut-off events. For 1618/1618 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4014 event pairs, 180 based on Foata normal form. 11/805 useless extension candidates. Maximal degree in co-relation 2588. Up to 457 conditions per place. [2023-08-27 08:45:22,574 INFO L140 encePairwiseOnDemand]: 258/261 looper letters, 47 selfloop transitions, 8 changer transitions 3/58 dead transitions. [2023-08-27 08:45:22,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 58 transitions, 551 flow [2023-08-27 08:45:22,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:45:22,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:45:22,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-27 08:45:22,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41762452107279696 [2023-08-27 08:45:22,576 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-27 08:45:22,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-27 08:45:22,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:22,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-27 08:45:22,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:22,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:22,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:22,579 INFO L175 Difference]: Start difference. First operand has 68 places, 50 transitions, 406 flow. Second operand 3 states and 327 transitions. [2023-08-27 08:45:22,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 58 transitions, 551 flow [2023-08-27 08:45:22,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 58 transitions, 531 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-27 08:45:22,585 INFO L231 Difference]: Finished difference. Result has 66 places, 49 transitions, 404 flow [2023-08-27 08:45:22,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=404, PETRI_PLACES=66, PETRI_TRANSITIONS=49} [2023-08-27 08:45:22,586 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 33 predicate places. [2023-08-27 08:45:22,586 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 49 transitions, 404 flow [2023-08-27 08:45:22,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:22,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:22,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:22,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-27 08:45:22,586 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:22,587 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:22,587 INFO L85 PathProgramCache]: Analyzing trace with hash 757560504, now seen corresponding path program 1 times [2023-08-27 08:45:22,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:22,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996323262] [2023-08-27 08:45:22,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:22,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:22,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:22,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:45:22,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:22,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996323262] [2023-08-27 08:45:22,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996323262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:22,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036635753] [2023-08-27 08:45:22,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:22,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:22,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:22,896 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 08:45:22,921 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 08:45:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:23,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 08:45:23,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:23,058 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 08:45:23,093 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 08:45:23,124 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:45:23,170 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:45:23,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:23,267 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int)) (v_ArrVal_385 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_385) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse1 (* c_~front~0 4))) (or (= 5 (select .cse0 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (not (= (select .cse0 (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 5))))) is different from false [2023-08-27 08:45:23,277 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:45:23,277 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 08:45:23,287 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:45:23,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 136 [2023-08-27 08:45:23,304 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 08:45:23,304 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 133 treesize of output 103 [2023-08-27 08:45:23,313 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 08:45:23,313 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 82 treesize of output 67 [2023-08-27 08:45:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-27 08:45:23,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036635753] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:23,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:23,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2023-08-27 08:45:23,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534075295] [2023-08-27 08:45:23,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:23,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 08:45:23,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:23,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 08:45:23,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=109, Unknown=2, NotChecked=22, Total=182 [2023-08-27 08:45:23,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 261 [2023-08-27 08:45:23,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 49 transitions, 404 flow. Second operand has 14 states, 14 states have (on average 75.28571428571429) internal successors, (1054), 14 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:23,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:23,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 261 [2023-08-27 08:45:23,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:23,425 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_385 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_385) c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (or (= 5 (select .cse0 (+ c_~queue~0.offset .cse1))) (not (= 5 (select .cse0 (+ (* c_~size~0 4) c_~queue~0.offset .cse1))))))) (= c_~queue~0.offset 0) (= 5 c_~x~0) (= c_~front~0 0) (= 5 (select (select |c_#memory_int| c_~queue~0.base) 0))) is different from false [2023-08-27 08:45:23,694 INFO L124 PetriNetUnfolderBase]: 687/1418 cut-off events. [2023-08-27 08:45:23,694 INFO L125 PetriNetUnfolderBase]: For 3593/3593 co-relation queries the response was YES. [2023-08-27 08:45:23,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4948 conditions, 1418 events. 687/1418 cut-off events. For 3593/3593 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8642 event pairs, 173 based on Foata normal form. 9/1427 useless extension candidates. Maximal degree in co-relation 4918. Up to 661 conditions per place. [2023-08-27 08:45:23,703 INFO L140 encePairwiseOnDemand]: 251/261 looper letters, 76 selfloop transitions, 34 changer transitions 21/131 dead transitions. [2023-08-27 08:45:23,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 131 transitions, 1249 flow [2023-08-27 08:45:23,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 08:45:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 08:45:23,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 726 transitions. [2023-08-27 08:45:23,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3090676883780332 [2023-08-27 08:45:23,706 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 726 transitions. [2023-08-27 08:45:23,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 726 transitions. [2023-08-27 08:45:23,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:23,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 726 transitions. [2023-08-27 08:45:23,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.66666666666667) internal successors, (726), 9 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:23,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 261.0) internal successors, (2610), 10 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:23,712 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 261.0) internal successors, (2610), 10 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:23,712 INFO L175 Difference]: Start difference. First operand has 66 places, 49 transitions, 404 flow. Second operand 9 states and 726 transitions. [2023-08-27 08:45:23,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 131 transitions, 1249 flow [2023-08-27 08:45:23,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 131 transitions, 1197 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-27 08:45:23,725 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 827 flow [2023-08-27 08:45:23,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=827, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2023-08-27 08:45:23,725 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 39 predicate places. [2023-08-27 08:45:23,725 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 827 flow [2023-08-27 08:45:23,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 75.28571428571429) internal successors, (1054), 14 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:23,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:23,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:23,735 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 08:45:23,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-27 08:45:23,932 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:23,932 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:23,932 INFO L85 PathProgramCache]: Analyzing trace with hash 1324299618, now seen corresponding path program 2 times [2023-08-27 08:45:23,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:23,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890350237] [2023-08-27 08:45:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:23,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:45:24,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:24,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890350237] [2023-08-27 08:45:24,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890350237] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:24,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366080520] [2023-08-27 08:45:24,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:45:24,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:24,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:24,159 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 08:45:24,185 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 08:45:24,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:45:24,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:45:24,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-27 08:45:24,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:45:24,377 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:24,410 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:45:24,410 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 11 [2023-08-27 08:45:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:45:24,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366080520] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:24,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:24,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2023-08-27 08:45:24,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781262668] [2023-08-27 08:45:24,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:24,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:45:24,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:24,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:45:24,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:45:24,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 261 [2023-08-27 08:45:24,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 827 flow. Second operand has 8 states, 8 states have (on average 89.375) internal successors, (715), 8 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:24,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:24,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 261 [2023-08-27 08:45:24,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:24,713 INFO L124 PetriNetUnfolderBase]: 925/1836 cut-off events. [2023-08-27 08:45:24,713 INFO L125 PetriNetUnfolderBase]: For 5840/5840 co-relation queries the response was YES. [2023-08-27 08:45:24,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7805 conditions, 1836 events. 925/1836 cut-off events. For 5840/5840 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11542 event pairs, 279 based on Foata normal form. 6/1842 useless extension candidates. Maximal degree in co-relation 7772. Up to 957 conditions per place. [2023-08-27 08:45:24,725 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 71 selfloop transitions, 42 changer transitions 10/123 dead transitions. [2023-08-27 08:45:24,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 123 transitions, 1440 flow [2023-08-27 08:45:24,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:45:24,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:45:24,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 472 transitions. [2023-08-27 08:45:24,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36168582375478925 [2023-08-27 08:45:24,727 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 472 transitions. [2023-08-27 08:45:24,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 472 transitions. [2023-08-27 08:45:24,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:24,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 472 transitions. [2023-08-27 08:45:24,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:24,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:24,731 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:24,731 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 827 flow. Second operand 5 states and 472 transitions. [2023-08-27 08:45:24,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 123 transitions, 1440 flow [2023-08-27 08:45:24,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 123 transitions, 1420 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-27 08:45:24,751 INFO L231 Difference]: Finished difference. Result has 75 places, 90 transitions, 1106 flow [2023-08-27 08:45:24,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1106, PETRI_PLACES=75, PETRI_TRANSITIONS=90} [2023-08-27 08:45:24,751 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 42 predicate places. [2023-08-27 08:45:24,751 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 90 transitions, 1106 flow [2023-08-27 08:45:24,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 89.375) internal successors, (715), 8 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:24,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:24,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:24,763 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 08:45:24,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-27 08:45:24,958 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:24,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:24,958 INFO L85 PathProgramCache]: Analyzing trace with hash -762603538, now seen corresponding path program 3 times [2023-08-27 08:45:24,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:24,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851501942] [2023-08-27 08:45:24,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:24,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:45:25,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:25,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851501942] [2023-08-27 08:45:25,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851501942] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:25,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995521395] [2023-08-27 08:45:25,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:45:25,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:25,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:25,269 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 08:45:25,292 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 08:45:25,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:45:25,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:45:25,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 08:45:25,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:25,428 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 08:45:25,455 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 08:45:25,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:45:25,509 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 08:45:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:45:25,542 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:25,570 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_449 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2023-08-27 08:45:25,645 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:45:25,645 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 48 [2023-08-27 08:45:25,653 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:45:25,654 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 184 treesize of output 165 [2023-08-27 08:45:25,659 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 28 treesize of output 16 [2023-08-27 08:45:25,669 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:45:25,670 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 55 treesize of output 48 [2023-08-27 08:45:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:45:25,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995521395] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:25,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:25,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-08-27 08:45:25,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845435240] [2023-08-27 08:45:25,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:25,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 08:45:25,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:25,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 08:45:25,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=161, Unknown=3, NotChecked=26, Total=240 [2023-08-27 08:45:25,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 261 [2023-08-27 08:45:25,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 90 transitions, 1106 flow. Second operand has 16 states, 16 states have (on average 75.0625) internal successors, (1201), 16 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:25,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:25,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 261 [2023-08-27 08:45:25,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:26,169 INFO L124 PetriNetUnfolderBase]: 1060/2037 cut-off events. [2023-08-27 08:45:26,170 INFO L125 PetriNetUnfolderBase]: For 8051/8051 co-relation queries the response was YES. [2023-08-27 08:45:26,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9108 conditions, 2037 events. 1060/2037 cut-off events. For 8051/8051 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12634 event pairs, 237 based on Foata normal form. 9/2046 useless extension candidates. Maximal degree in co-relation 9074. Up to 1073 conditions per place. [2023-08-27 08:45:26,184 INFO L140 encePairwiseOnDemand]: 251/261 looper letters, 51 selfloop transitions, 70 changer transitions 18/139 dead transitions. [2023-08-27 08:45:26,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 139 transitions, 1821 flow [2023-08-27 08:45:26,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:45:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:45:26,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 560 transitions. [2023-08-27 08:45:26,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3065134099616858 [2023-08-27 08:45:26,187 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 560 transitions. [2023-08-27 08:45:26,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 560 transitions. [2023-08-27 08:45:26,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:26,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 560 transitions. [2023-08-27 08:45:26,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:26,191 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:26,191 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:26,191 INFO L175 Difference]: Start difference. First operand has 75 places, 90 transitions, 1106 flow. Second operand 7 states and 560 transitions. [2023-08-27 08:45:26,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 139 transitions, 1821 flow [2023-08-27 08:45:26,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 139 transitions, 1774 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-27 08:45:26,219 INFO L231 Difference]: Finished difference. Result has 81 places, 106 transitions, 1550 flow [2023-08-27 08:45:26,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1550, PETRI_PLACES=81, PETRI_TRANSITIONS=106} [2023-08-27 08:45:26,219 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2023-08-27 08:45:26,219 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 106 transitions, 1550 flow [2023-08-27 08:45:26,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.0625) internal successors, (1201), 16 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:26,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:26,231 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:26,239 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 08:45:26,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-27 08:45:26,437 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:26,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:26,438 INFO L85 PathProgramCache]: Analyzing trace with hash 95443360, now seen corresponding path program 4 times [2023-08-27 08:45:26,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:26,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126402905] [2023-08-27 08:45:26,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:26,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:26,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:45:26,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:26,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126402905] [2023-08-27 08:45:26,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126402905] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:26,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319878341] [2023-08-27 08:45:26,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:45:26,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:26,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:26,771 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 08:45:26,773 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 08:45:26,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:45:26,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:45:26,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 08:45:26,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:27,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:45:27,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:27,061 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:45:27,062 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 28 treesize of output 11 [2023-08-27 08:45:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:45:27,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319878341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:27,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:27,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 15 [2023-08-27 08:45:27,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616866319] [2023-08-27 08:45:27,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:27,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:45:27,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:27,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:45:27,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:45:27,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 261 [2023-08-27 08:45:27,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 106 transitions, 1550 flow. Second operand has 17 states, 17 states have (on average 82.6470588235294) internal successors, (1405), 17 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:27,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:27,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 261 [2023-08-27 08:45:27,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:27,864 INFO L124 PetriNetUnfolderBase]: 1204/2266 cut-off events. [2023-08-27 08:45:27,864 INFO L125 PetriNetUnfolderBase]: For 13412/13412 co-relation queries the response was YES. [2023-08-27 08:45:27,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12206 conditions, 2266 events. 1204/2266 cut-off events. For 13412/13412 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14247 event pairs, 170 based on Foata normal form. 15/2281 useless extension candidates. Maximal degree in co-relation 12170. Up to 1161 conditions per place. [2023-08-27 08:45:27,879 INFO L140 encePairwiseOnDemand]: 255/261 looper letters, 120 selfloop transitions, 82 changer transitions 51/253 dead transitions. [2023-08-27 08:45:27,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 253 transitions, 3072 flow [2023-08-27 08:45:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 08:45:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 08:45:27,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1585 transitions. [2023-08-27 08:45:27,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33737760749255 [2023-08-27 08:45:27,883 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1585 transitions. [2023-08-27 08:45:27,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1585 transitions. [2023-08-27 08:45:27,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:27,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1585 transitions. [2023-08-27 08:45:27,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 88.05555555555556) internal successors, (1585), 18 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:27,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 261.0) internal successors, (4959), 19 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:27,893 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 261.0) internal successors, (4959), 19 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:27,893 INFO L175 Difference]: Start difference. First operand has 81 places, 106 transitions, 1550 flow. Second operand 18 states and 1585 transitions. [2023-08-27 08:45:27,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 253 transitions, 3072 flow [2023-08-27 08:45:27,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 253 transitions, 2848 flow, removed 95 selfloop flow, removed 7 redundant places. [2023-08-27 08:45:27,933 INFO L231 Difference]: Finished difference. Result has 94 places, 120 transitions, 1900 flow [2023-08-27 08:45:27,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1900, PETRI_PLACES=94, PETRI_TRANSITIONS=120} [2023-08-27 08:45:27,933 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 61 predicate places. [2023-08-27 08:45:27,933 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 120 transitions, 1900 flow [2023-08-27 08:45:27,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.6470588235294) internal successors, (1405), 17 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:27,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:27,934 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:27,940 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 08:45:28,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:28,140 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:28,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:28,140 INFO L85 PathProgramCache]: Analyzing trace with hash -594651736, now seen corresponding path program 5 times [2023-08-27 08:45:28,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:28,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668676223] [2023-08-27 08:45:28,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:28,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:28,513 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:45:28,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:28,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668676223] [2023-08-27 08:45:28,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668676223] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:28,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693860877] [2023-08-27 08:45:28,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:45:28,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:28,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:28,514 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 08:45:28,532 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 08:45:28,640 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:45:28,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:45:28,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 08:45:28,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:28,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:45:28,785 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 08:45:28,891 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:45:28,891 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 21 treesize of output 10 [2023-08-27 08:45:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:45:28,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:29,013 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:45:29,013 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 47 treesize of output 35 [2023-08-27 08:45:29,022 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 08:45:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:45:29,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693860877] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:29,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:29,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-08-27 08:45:29,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463944438] [2023-08-27 08:45:29,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:29,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 08:45:29,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:29,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 08:45:29,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-08-27 08:45:29,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 261 [2023-08-27 08:45:29,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 120 transitions, 1900 flow. Second operand has 22 states, 22 states have (on average 78.0909090909091) internal successors, (1718), 22 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:29,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:29,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 261 [2023-08-27 08:45:29,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:30,229 INFO L124 PetriNetUnfolderBase]: 1638/3076 cut-off events. [2023-08-27 08:45:30,229 INFO L125 PetriNetUnfolderBase]: For 19340/19340 co-relation queries the response was YES. [2023-08-27 08:45:30,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15049 conditions, 3076 events. 1638/3076 cut-off events. For 19340/19340 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20350 event pairs, 167 based on Foata normal form. 44/3120 useless extension candidates. Maximal degree in co-relation 15011. Up to 1567 conditions per place. [2023-08-27 08:45:30,249 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 97 selfloop transitions, 104 changer transitions 70/271 dead transitions. [2023-08-27 08:45:30,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 271 transitions, 3488 flow [2023-08-27 08:45:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 08:45:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 08:45:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1598 transitions. [2023-08-27 08:45:30,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3222423875781408 [2023-08-27 08:45:30,253 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1598 transitions. [2023-08-27 08:45:30,253 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1598 transitions. [2023-08-27 08:45:30,254 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:30,254 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1598 transitions. [2023-08-27 08:45:30,256 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 08:45:30,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 261.0) internal successors, (5220), 20 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:30,261 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 261.0) internal successors, (5220), 20 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:30,261 INFO L175 Difference]: Start difference. First operand has 94 places, 120 transitions, 1900 flow. Second operand 19 states and 1598 transitions. [2023-08-27 08:45:30,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 271 transitions, 3488 flow [2023-08-27 08:45:30,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 271 transitions, 3199 flow, removed 82 selfloop flow, removed 7 redundant places. [2023-08-27 08:45:30,318 INFO L231 Difference]: Finished difference. Result has 113 places, 140 transitions, 2232 flow [2023-08-27 08:45:30,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2232, PETRI_PLACES=113, PETRI_TRANSITIONS=140} [2023-08-27 08:45:30,319 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 80 predicate places. [2023-08-27 08:45:30,319 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 140 transitions, 2232 flow [2023-08-27 08:45:30,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 78.0909090909091) internal successors, (1718), 22 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:30,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:30,319 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:30,331 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 08:45:30,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:30,525 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:30,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:30,526 INFO L85 PathProgramCache]: Analyzing trace with hash -440576514, now seen corresponding path program 6 times [2023-08-27 08:45:30,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:30,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307310716] [2023-08-27 08:45:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:30,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:45:30,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:30,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307310716] [2023-08-27 08:45:30,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307310716] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:30,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233334755] [2023-08-27 08:45:30,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:45:30,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:30,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:30,685 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 08:45:30,712 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 08:45:30,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 08:45:30,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:45:30,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:45:30,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:45:30,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:45:31,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233334755] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:31,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:31,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-27 08:45:31,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118857992] [2023-08-27 08:45:31,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:31,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:45:31,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:31,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:45:31,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:45:31,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 261 [2023-08-27 08:45:31,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 140 transitions, 2232 flow. Second operand has 18 states, 18 states have (on average 88.27777777777777) internal successors, (1589), 18 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:31,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:31,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 261 [2023-08-27 08:45:31,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:31,664 INFO L124 PetriNetUnfolderBase]: 1589/2989 cut-off events. [2023-08-27 08:45:31,664 INFO L125 PetriNetUnfolderBase]: For 19398/19398 co-relation queries the response was YES. [2023-08-27 08:45:31,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14855 conditions, 2989 events. 1589/2989 cut-off events. For 19398/19398 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20236 event pairs, 912 based on Foata normal form. 16/3005 useless extension candidates. Maximal degree in co-relation 14810. Up to 2717 conditions per place. [2023-08-27 08:45:31,687 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 130 selfloop transitions, 4 changer transitions 48/182 dead transitions. [2023-08-27 08:45:31,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 182 transitions, 2815 flow [2023-08-27 08:45:31,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 08:45:31,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 08:45:31,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 920 transitions. [2023-08-27 08:45:31,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524904214559387 [2023-08-27 08:45:31,689 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 920 transitions. [2023-08-27 08:45:31,689 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 920 transitions. [2023-08-27 08:45:31,690 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:31,690 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 920 transitions. [2023-08-27 08:45:31,691 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:31,694 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 261.0) internal successors, (2871), 11 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:31,694 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 261.0) internal successors, (2871), 11 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:31,694 INFO L175 Difference]: Start difference. First operand has 113 places, 140 transitions, 2232 flow. Second operand 10 states and 920 transitions. [2023-08-27 08:45:31,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 182 transitions, 2815 flow [2023-08-27 08:45:31,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 182 transitions, 2473 flow, removed 89 selfloop flow, removed 13 redundant places. [2023-08-27 08:45:31,766 INFO L231 Difference]: Finished difference. Result has 110 places, 134 transitions, 1830 flow [2023-08-27 08:45:31,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1830, PETRI_PLACES=110, PETRI_TRANSITIONS=134} [2023-08-27 08:45:31,766 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 77 predicate places. [2023-08-27 08:45:31,767 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 134 transitions, 1830 flow [2023-08-27 08:45:31,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 88.27777777777777) internal successors, (1589), 18 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:31,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:31,767 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:31,779 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 08:45:31,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:31,973 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:31,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:31,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1897318082, now seen corresponding path program 7 times [2023-08-27 08:45:31,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:31,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308911959] [2023-08-27 08:45:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:31,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:32,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:45:32,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:32,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308911959] [2023-08-27 08:45:32,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308911959] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:32,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135063812] [2023-08-27 08:45:32,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:45:32,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:32,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:32,462 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 08:45:32,464 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 08:45:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:32,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 08:45:32,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:32,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:45:32,761 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:32,834 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:45:32,834 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 28 treesize of output 11 [2023-08-27 08:45:32,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:45:32,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135063812] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:32,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:32,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 23 [2023-08-27 08:45:32,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42322134] [2023-08-27 08:45:32,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:32,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 08:45:32,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:32,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 08:45:32,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2023-08-27 08:45:32,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 261 [2023-08-27 08:45:32,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 134 transitions, 1830 flow. Second operand has 25 states, 25 states have (on average 82.12) internal successors, (2053), 25 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:32,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:32,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 261 [2023-08-27 08:45:32,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:34,681 INFO L124 PetriNetUnfolderBase]: 2539/4678 cut-off events. [2023-08-27 08:45:34,681 INFO L125 PetriNetUnfolderBase]: For 21091/21091 co-relation queries the response was YES. [2023-08-27 08:45:34,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21359 conditions, 4678 events. 2539/4678 cut-off events. For 21091/21091 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 32885 event pairs, 264 based on Foata normal form. 50/4728 useless extension candidates. Maximal degree in co-relation 21317. Up to 2324 conditions per place. [2023-08-27 08:45:34,708 INFO L140 encePairwiseOnDemand]: 255/261 looper letters, 203 selfloop transitions, 178 changer transitions 133/514 dead transitions. [2023-08-27 08:45:34,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 514 transitions, 5429 flow [2023-08-27 08:45:34,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-27 08:45:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-27 08:45:34,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3696 transitions. [2023-08-27 08:45:34,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3371647509578544 [2023-08-27 08:45:34,715 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3696 transitions. [2023-08-27 08:45:34,715 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3696 transitions. [2023-08-27 08:45:34,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:34,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3696 transitions. [2023-08-27 08:45:34,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 88.0) internal successors, (3696), 42 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:34,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 261.0) internal successors, (11223), 43 states have internal predecessors, (11223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:34,731 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 261.0) internal successors, (11223), 43 states have internal predecessors, (11223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:34,731 INFO L175 Difference]: Start difference. First operand has 110 places, 134 transitions, 1830 flow. Second operand 42 states and 3696 transitions. [2023-08-27 08:45:34,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 514 transitions, 5429 flow [2023-08-27 08:45:34,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 514 transitions, 5387 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-08-27 08:45:34,813 INFO L231 Difference]: Finished difference. Result has 150 places, 213 transitions, 3451 flow [2023-08-27 08:45:34,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=3451, PETRI_PLACES=150, PETRI_TRANSITIONS=213} [2023-08-27 08:45:34,813 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 117 predicate places. [2023-08-27 08:45:34,813 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 213 transitions, 3451 flow [2023-08-27 08:45:34,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.12) internal successors, (2053), 25 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:34,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:34,814 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:34,821 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 08:45:35,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:35,020 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:35,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:35,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1901133394, now seen corresponding path program 8 times [2023-08-27 08:45:35,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:35,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780577310] [2023-08-27 08:45:35,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:35,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:35,644 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:45:35,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:35,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780577310] [2023-08-27 08:45:35,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780577310] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:35,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270566610] [2023-08-27 08:45:35,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:45:35,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:35,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:35,646 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 08:45:35,648 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 08:45:35,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:45:35,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:45:35,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 08:45:35,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:35,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:45:35,970 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 08:45:36,057 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:45:36,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:36,138 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_629 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_629) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)))) is different from false [2023-08-27 08:45:36,153 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:45:36,153 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 47 treesize of output 35 [2023-08-27 08:45:36,159 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 08:45:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:45:36,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270566610] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:36,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:36,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 30 [2023-08-27 08:45:36,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090386087] [2023-08-27 08:45:36,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:36,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 08:45:36,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:36,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 08:45:36,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=837, Unknown=1, NotChecked=58, Total=992 [2023-08-27 08:45:36,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 261 [2023-08-27 08:45:36,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 213 transitions, 3451 flow. Second operand has 32 states, 32 states have (on average 77.71875) internal successors, (2487), 32 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 08:45:36,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:36,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 261 [2023-08-27 08:45:36,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:37,882 INFO L124 PetriNetUnfolderBase]: 2940/5328 cut-off events. [2023-08-27 08:45:37,882 INFO L125 PetriNetUnfolderBase]: For 39655/39655 co-relation queries the response was YES. [2023-08-27 08:45:37,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27919 conditions, 5328 events. 2940/5328 cut-off events. For 39655/39655 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37387 event pairs, 227 based on Foata normal form. 5/5333 useless extension candidates. Maximal degree in co-relation 27867. Up to 2661 conditions per place. [2023-08-27 08:45:37,915 INFO L140 encePairwiseOnDemand]: 253/261 looper letters, 112 selfloop transitions, 220 changer transitions 63/395 dead transitions. [2023-08-27 08:45:37,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 395 transitions, 5797 flow [2023-08-27 08:45:37,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 08:45:37,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 08:45:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2077 transitions. [2023-08-27 08:45:37,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31831417624521074 [2023-08-27 08:45:37,919 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2077 transitions. [2023-08-27 08:45:37,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2077 transitions. [2023-08-27 08:45:37,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:37,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2077 transitions. [2023-08-27 08:45:37,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 83.08) internal successors, (2077), 25 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:37,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 261.0) internal successors, (6786), 26 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:37,929 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 261.0) internal successors, (6786), 26 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:37,929 INFO L175 Difference]: Start difference. First operand has 150 places, 213 transitions, 3451 flow. Second operand 25 states and 2077 transitions. [2023-08-27 08:45:37,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 395 transitions, 5797 flow [2023-08-27 08:45:38,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 395 transitions, 5474 flow, removed 118 selfloop flow, removed 11 redundant places. [2023-08-27 08:45:38,101 INFO L231 Difference]: Finished difference. Result has 166 places, 254 transitions, 4339 flow [2023-08-27 08:45:38,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4339, PETRI_PLACES=166, PETRI_TRANSITIONS=254} [2023-08-27 08:45:38,102 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 133 predicate places. [2023-08-27 08:45:38,102 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 254 transitions, 4339 flow [2023-08-27 08:45:38,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 77.71875) internal successors, (2487), 32 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 08:45:38,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:38,103 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:38,111 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 08:45:38,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:38,312 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:38,312 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1465975416, now seen corresponding path program 9 times [2023-08-27 08:45:38,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:38,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679222720] [2023-08-27 08:45:38,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:38,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:45:38,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:38,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679222720] [2023-08-27 08:45:38,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679222720] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:38,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338990064] [2023-08-27 08:45:38,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:45:38,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:38,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:38,433 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 08:45:38,460 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 08:45:38,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 08:45:38,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:45:38,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 08:45:38,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:45:38,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:45:39,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338990064] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:39,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:39,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2023-08-27 08:45:39,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460189506] [2023-08-27 08:45:39,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:39,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 08:45:39,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:39,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 08:45:39,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2023-08-27 08:45:39,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 261 [2023-08-27 08:45:39,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 254 transitions, 4339 flow. Second operand has 23 states, 23 states have (on average 88.34782608695652) internal successors, (2032), 23 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:39,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:39,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 261 [2023-08-27 08:45:39,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:41,015 INFO L124 PetriNetUnfolderBase]: 5963/11165 cut-off events. [2023-08-27 08:45:41,015 INFO L125 PetriNetUnfolderBase]: For 105482/105482 co-relation queries the response was YES. [2023-08-27 08:45:41,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70775 conditions, 11165 events. 5963/11165 cut-off events. For 105482/105482 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 91513 event pairs, 861 based on Foata normal form. 282/11447 useless extension candidates. Maximal degree in co-relation 70721. Up to 6140 conditions per place. [2023-08-27 08:45:41,080 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 127 selfloop transitions, 260 changer transitions 251/638 dead transitions. [2023-08-27 08:45:41,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 638 transitions, 11375 flow [2023-08-27 08:45:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 08:45:41,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 08:45:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1870 transitions. [2023-08-27 08:45:41,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35823754789272033 [2023-08-27 08:45:41,083 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1870 transitions. [2023-08-27 08:45:41,084 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1870 transitions. [2023-08-27 08:45:41,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:41,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1870 transitions. [2023-08-27 08:45:41,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 93.5) internal successors, (1870), 20 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:41,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 261.0) internal successors, (5481), 21 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:41,090 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 261.0) internal successors, (5481), 21 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:41,091 INFO L175 Difference]: Start difference. First operand has 166 places, 254 transitions, 4339 flow. Second operand 20 states and 1870 transitions. [2023-08-27 08:45:41,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 638 transitions, 11375 flow [2023-08-27 08:45:41,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 638 transitions, 10727 flow, removed 202 selfloop flow, removed 10 redundant places. [2023-08-27 08:45:41,517 INFO L231 Difference]: Finished difference. Result has 181 places, 350 transitions, 6712 flow [2023-08-27 08:45:41,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=4032, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6712, PETRI_PLACES=181, PETRI_TRANSITIONS=350} [2023-08-27 08:45:41,518 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 148 predicate places. [2023-08-27 08:45:41,518 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 350 transitions, 6712 flow [2023-08-27 08:45:41,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 88.34782608695652) internal successors, (2032), 23 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:41,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:41,518 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:41,523 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 08:45:41,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:41,719 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:41,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:41,719 INFO L85 PathProgramCache]: Analyzing trace with hash -865259478, now seen corresponding path program 10 times [2023-08-27 08:45:41,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:41,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242864262] [2023-08-27 08:45:41,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:41,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:42,265 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:45:42,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:42,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242864262] [2023-08-27 08:45:42,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242864262] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:42,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220990775] [2023-08-27 08:45:42,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:45:42,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:42,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:42,269 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 08:45:42,272 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 08:45:42,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:45:42,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:45:42,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 08:45:42,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:42,583 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:45:42,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:42,641 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:45:42,642 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 28 treesize of output 11 [2023-08-27 08:45:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-27 08:45:42,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220990775] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:42,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:42,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 7] total 28 [2023-08-27 08:45:42,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772301639] [2023-08-27 08:45:42,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:42,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 08:45:42,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:42,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 08:45:42,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2023-08-27 08:45:42,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 261 [2023-08-27 08:45:42,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 350 transitions, 6712 flow. Second operand has 30 states, 30 states have (on average 81.73333333333333) internal successors, (2452), 30 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:42,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:42,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 261 [2023-08-27 08:45:42,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:46,952 INFO L124 PetriNetUnfolderBase]: 5906/10924 cut-off events. [2023-08-27 08:45:46,953 INFO L125 PetriNetUnfolderBase]: For 132554/132554 co-relation queries the response was YES. [2023-08-27 08:45:46,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74798 conditions, 10924 events. 5906/10924 cut-off events. For 132554/132554 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 87709 event pairs, 468 based on Foata normal form. 33/10957 useless extension candidates. Maximal degree in co-relation 74738. Up to 6213 conditions per place. [2023-08-27 08:45:47,025 INFO L140 encePairwiseOnDemand]: 255/261 looper letters, 401 selfloop transitions, 513 changer transitions 187/1101 dead transitions. [2023-08-27 08:45:47,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1101 transitions, 17491 flow [2023-08-27 08:45:47,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-08-27 08:45:47,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-08-27 08:45:47,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 7515 transitions. [2023-08-27 08:45:47,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33874239350912777 [2023-08-27 08:45:47,036 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 7515 transitions. [2023-08-27 08:45:47,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 7515 transitions. [2023-08-27 08:45:47,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:47,038 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 7515 transitions. [2023-08-27 08:45:47,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 88.41176470588235) internal successors, (7515), 85 states have internal predecessors, (7515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:47,062 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 261.0) internal successors, (22446), 86 states have internal predecessors, (22446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:47,064 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 261.0) internal successors, (22446), 86 states have internal predecessors, (22446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:47,065 INFO L175 Difference]: Start difference. First operand has 181 places, 350 transitions, 6712 flow. Second operand 85 states and 7515 transitions. [2023-08-27 08:45:47,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1101 transitions, 17491 flow [2023-08-27 08:45:47,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 1101 transitions, 16677 flow, removed 397 selfloop flow, removed 9 redundant places. [2023-08-27 08:45:47,421 INFO L231 Difference]: Finished difference. Result has 274 places, 545 transitions, 11621 flow [2023-08-27 08:45:47,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=6356, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=11621, PETRI_PLACES=274, PETRI_TRANSITIONS=545} [2023-08-27 08:45:47,422 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 241 predicate places. [2023-08-27 08:45:47,422 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 545 transitions, 11621 flow [2023-08-27 08:45:47,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.73333333333333) internal successors, (2452), 30 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:47,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:47,423 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:47,428 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 08:45:47,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-27 08:45:47,623 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:47,624 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:47,624 INFO L85 PathProgramCache]: Analyzing trace with hash -845945824, now seen corresponding path program 11 times [2023-08-27 08:45:47,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:47,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480790014] [2023-08-27 08:45:47,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:47,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:47,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:45:48,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:48,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480790014] [2023-08-27 08:45:48,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480790014] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:48,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189087651] [2023-08-27 08:45:48,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:45:48,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:48,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:48,296 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 08:45:48,317 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 08:45:48,469 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:45:48,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:45:48,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 08:45:48,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:48,716 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:45:48,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:48,818 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:45:48,818 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 28 treesize of output 11 [2023-08-27 08:45:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:45:48,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189087651] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:48,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:48,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 33 [2023-08-27 08:45:48,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891299817] [2023-08-27 08:45:48,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:48,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 08:45:48,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:48,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 08:45:48,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2023-08-27 08:45:48,906 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 261 [2023-08-27 08:45:48,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 545 transitions, 11621 flow. Second operand has 35 states, 35 states have (on average 81.8) internal successors, (2863), 35 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:48,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:48,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 261 [2023-08-27 08:45:48,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:45:54,791 INFO L124 PetriNetUnfolderBase]: 8459/15515 cut-off events. [2023-08-27 08:45:54,791 INFO L125 PetriNetUnfolderBase]: For 277779/277779 co-relation queries the response was YES. [2023-08-27 08:45:54,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108657 conditions, 15515 events. 8459/15515 cut-off events. For 277779/277779 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 130058 event pairs, 595 based on Foata normal form. 79/15594 useless extension candidates. Maximal degree in co-relation 108573. Up to 9032 conditions per place. [2023-08-27 08:45:54,905 INFO L140 encePairwiseOnDemand]: 255/261 looper letters, 263 selfloop transitions, 748 changer transitions 227/1238 dead transitions. [2023-08-27 08:45:54,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1238 transitions, 22411 flow [2023-08-27 08:45:54,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-27 08:45:54,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-27 08:45:54,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 5986 transitions. [2023-08-27 08:45:54,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3372774397115168 [2023-08-27 08:45:54,913 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 5986 transitions. [2023-08-27 08:45:54,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 5986 transitions. [2023-08-27 08:45:54,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:45:54,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 5986 transitions. [2023-08-27 08:45:54,921 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 88.02941176470588) internal successors, (5986), 68 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:54,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 261.0) internal successors, (18009), 69 states have internal predecessors, (18009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:54,934 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 261.0) internal successors, (18009), 69 states have internal predecessors, (18009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:54,934 INFO L175 Difference]: Start difference. First operand has 274 places, 545 transitions, 11621 flow. Second operand 68 states and 5986 transitions. [2023-08-27 08:45:54,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1238 transitions, 22411 flow [2023-08-27 08:45:55,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1238 transitions, 18154 flow, removed 1451 selfloop flow, removed 15 redundant places. [2023-08-27 08:45:55,852 INFO L231 Difference]: Finished difference. Result has 343 places, 776 transitions, 15171 flow [2023-08-27 08:45:55,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=9017, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=15171, PETRI_PLACES=343, PETRI_TRANSITIONS=776} [2023-08-27 08:45:55,853 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 310 predicate places. [2023-08-27 08:45:55,853 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 776 transitions, 15171 flow [2023-08-27 08:45:55,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 81.8) internal successors, (2863), 35 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:55,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:45:55,854 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:45:55,861 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 08:45:56,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 08:45:56,060 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:45:56,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:45:56,060 INFO L85 PathProgramCache]: Analyzing trace with hash 573754360, now seen corresponding path program 12 times [2023-08-27 08:45:56,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:45:56,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64808137] [2023-08-27 08:45:56,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:45:56,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:45:56,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:45:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:45:56,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:45:56,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64808137] [2023-08-27 08:45:56,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64808137] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:45:56,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544875750] [2023-08-27 08:45:56,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:45:56,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:45:56,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:45:56,764 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 08:45:56,766 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 08:45:56,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 08:45:56,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:45:56,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-27 08:45:56,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:45:57,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:45:57,111 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 08:45:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:45:57,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:45:57,330 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_794 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_794) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)))) is different from false [2023-08-27 08:45:57,338 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:45:57,338 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 47 treesize of output 35 [2023-08-27 08:45:57,345 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 08:45:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:45:57,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544875750] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:45:57,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:45:57,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-08-27 08:45:57,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848285692] [2023-08-27 08:45:57,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:45:57,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-27 08:45:57,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:45:57,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-27 08:45:57,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1160, Unknown=1, NotChecked=68, Total=1332 [2023-08-27 08:45:57,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 261 [2023-08-27 08:45:57,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 776 transitions, 15171 flow. Second operand has 37 states, 37 states have (on average 77.62162162162163) internal successors, (2872), 37 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:45:57,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:45:57,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 261 [2023-08-27 08:45:57,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:46:03,653 INFO L124 PetriNetUnfolderBase]: 10440/18630 cut-off events. [2023-08-27 08:46:03,654 INFO L125 PetriNetUnfolderBase]: For 214375/214375 co-relation queries the response was YES. [2023-08-27 08:46:03,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127105 conditions, 18630 events. 10440/18630 cut-off events. For 214375/214375 co-relation queries the response was YES. Maximal size of possible extension queue 1094. Compared 154419 event pairs, 654 based on Foata normal form. 2/18632 useless extension candidates. Maximal degree in co-relation 127004. Up to 11297 conditions per place. [2023-08-27 08:46:03,962 INFO L140 encePairwiseOnDemand]: 251/261 looper letters, 116 selfloop transitions, 949 changer transitions 85/1150 dead transitions. [2023-08-27 08:46:03,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1150 transitions, 22918 flow [2023-08-27 08:46:03,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 08:46:03,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 08:46:03,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2742 transitions. [2023-08-27 08:46:03,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31835597352838735 [2023-08-27 08:46:03,967 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2742 transitions. [2023-08-27 08:46:03,967 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2742 transitions. [2023-08-27 08:46:03,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:46:03,968 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2742 transitions. [2023-08-27 08:46:03,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 83.0909090909091) internal successors, (2742), 33 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:03,977 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 261.0) internal successors, (8874), 34 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:03,977 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 261.0) internal successors, (8874), 34 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:03,978 INFO L175 Difference]: Start difference. First operand has 343 places, 776 transitions, 15171 flow. Second operand 33 states and 2742 transitions. [2023-08-27 08:46:03,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1150 transitions, 22918 flow [2023-08-27 08:46:05,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1150 transitions, 22416 flow, removed 165 selfloop flow, removed 20 redundant places. [2023-08-27 08:46:05,470 INFO L231 Difference]: Finished difference. Result has 359 places, 978 transitions, 21044 flow [2023-08-27 08:46:05,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=14754, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=747, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=21044, PETRI_PLACES=359, PETRI_TRANSITIONS=978} [2023-08-27 08:46:05,470 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 326 predicate places. [2023-08-27 08:46:05,471 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 978 transitions, 21044 flow [2023-08-27 08:46:05,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 77.62162162162163) internal successors, (2872), 37 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:05,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:46:05,471 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:46:05,477 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 08:46:05,677 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,SelfDestructingSolverStorable26 [2023-08-27 08:46:05,677 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:46:05,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:46:05,678 INFO L85 PathProgramCache]: Analyzing trace with hash -455420422, now seen corresponding path program 13 times [2023-08-27 08:46:05,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:46:05,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726676521] [2023-08-27 08:46:05,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:46:05,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:46:05,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:46:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:46:05,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:46:05,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726676521] [2023-08-27 08:46:05,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726676521] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:46:05,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864218904] [2023-08-27 08:46:05,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:46:05,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:46:05,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:46:05,801 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 08:46:05,829 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 08:46:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:46:05,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 08:46:05,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:46:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:46:05,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:46:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:46:06,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864218904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:46:06,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:46:06,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2023-08-27 08:46:06,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584645772] [2023-08-27 08:46:06,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:46:06,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 08:46:06,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:46:06,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 08:46:06,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:46:06,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 261 [2023-08-27 08:46:06,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 978 transitions, 21044 flow. Second operand has 8 states, 8 states have (on average 105.75) internal successors, (846), 8 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:06,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:46:06,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 261 [2023-08-27 08:46:06,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:46:15,065 INFO L124 PetriNetUnfolderBase]: 14870/27197 cut-off events. [2023-08-27 08:46:15,065 INFO L125 PetriNetUnfolderBase]: For 423745/423745 co-relation queries the response was YES. [2023-08-27 08:46:15,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225589 conditions, 27197 events. 14870/27197 cut-off events. For 423745/423745 co-relation queries the response was YES. Maximal size of possible extension queue 1628. Compared 247081 event pairs, 1993 based on Foata normal form. 24/27221 useless extension candidates. Maximal degree in co-relation 225486. Up to 16229 conditions per place. [2023-08-27 08:46:15,565 INFO L140 encePairwiseOnDemand]: 258/261 looper letters, 294 selfloop transitions, 1065 changer transitions 7/1366 dead transitions. [2023-08-27 08:46:15,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1366 transitions, 32739 flow [2023-08-27 08:46:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:46:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:46:15,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 784 transitions. [2023-08-27 08:46:15,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42911877394636017 [2023-08-27 08:46:15,567 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 784 transitions. [2023-08-27 08:46:15,567 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 784 transitions. [2023-08-27 08:46:15,567 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:46:15,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 784 transitions. [2023-08-27 08:46:15,568 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.0) internal successors, (784), 7 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 08:46:15,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:15,569 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:15,570 INFO L175 Difference]: Start difference. First operand has 359 places, 978 transitions, 21044 flow. Second operand 7 states and 784 transitions. [2023-08-27 08:46:15,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1366 transitions, 32739 flow [2023-08-27 08:46:18,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1366 transitions, 31214 flow, removed 415 selfloop flow, removed 13 redundant places. [2023-08-27 08:46:18,163 INFO L231 Difference]: Finished difference. Result has 354 places, 1315 transitions, 31134 flow [2023-08-27 08:46:18,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=19619, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=806, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=31134, PETRI_PLACES=354, PETRI_TRANSITIONS=1315} [2023-08-27 08:46:18,164 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 321 predicate places. [2023-08-27 08:46:18,164 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 1315 transitions, 31134 flow [2023-08-27 08:46:18,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 105.75) internal successors, (846), 8 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:18,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:46:18,164 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:46:18,169 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 08:46:18,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:46:18,365 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:46:18,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:46:18,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1637783044, now seen corresponding path program 14 times [2023-08-27 08:46:18,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:46:18,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807098395] [2023-08-27 08:46:18,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:46:18,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:46:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:46:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:46:18,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:46:18,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807098395] [2023-08-27 08:46:18,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807098395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:46:18,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850226064] [2023-08-27 08:46:18,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:46:18,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:46:18,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:46:18,656 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 08:46:18,658 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 08:46:18,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:46:18,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:46:18,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 08:46:18,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:46:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:46:19,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:46:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:46:19,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850226064] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:46:19,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:46:19,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-27 08:46:19,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373122277] [2023-08-27 08:46:19,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:46:19,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 08:46:19,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:46:19,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 08:46:19,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2023-08-27 08:46:19,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 261 [2023-08-27 08:46:19,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1315 transitions, 31134 flow. Second operand has 33 states, 33 states have (on average 87.57575757575758) internal successors, (2890), 33 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:19,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:46:19,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 261 [2023-08-27 08:46:19,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:46:30,723 INFO L124 PetriNetUnfolderBase]: 15692/29434 cut-off events. [2023-08-27 08:46:30,723 INFO L125 PetriNetUnfolderBase]: For 545308/545308 co-relation queries the response was YES. [2023-08-27 08:46:31,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246156 conditions, 29434 events. 15692/29434 cut-off events. For 545308/545308 co-relation queries the response was YES. Maximal size of possible extension queue 1598. Compared 281510 event pairs, 8874 based on Foata normal form. 324/29758 useless extension candidates. Maximal degree in co-relation 246052. Up to 26259 conditions per place. [2023-08-27 08:46:31,180 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 1310 selfloop transitions, 6 changer transitions 285/1601 dead transitions. [2023-08-27 08:46:31,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1601 transitions, 39174 flow [2023-08-27 08:46:31,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 08:46:31,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 08:46:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2133 transitions. [2023-08-27 08:46:31,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3553223388305847 [2023-08-27 08:46:31,183 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2133 transitions. [2023-08-27 08:46:31,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2133 transitions. [2023-08-27 08:46:31,184 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:46:31,184 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2133 transitions. [2023-08-27 08:46:31,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 92.73913043478261) internal successors, (2133), 23 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 08:46:31,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 261.0) internal successors, (6264), 24 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:31,191 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 261.0) internal successors, (6264), 24 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:31,191 INFO L175 Difference]: Start difference. First operand has 354 places, 1315 transitions, 31134 flow. Second operand 23 states and 2133 transitions. [2023-08-27 08:46:31,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1601 transitions, 39174 flow [2023-08-27 08:46:36,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1601 transitions, 37756 flow, removed 703 selfloop flow, removed 1 redundant places. [2023-08-27 08:46:36,777 INFO L231 Difference]: Finished difference. Result has 392 places, 1316 transitions, 30206 flow [2023-08-27 08:46:36,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=29736, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=30206, PETRI_PLACES=392, PETRI_TRANSITIONS=1316} [2023-08-27 08:46:36,778 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 359 predicate places. [2023-08-27 08:46:36,779 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1316 transitions, 30206 flow [2023-08-27 08:46:36,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 87.57575757575758) internal successors, (2890), 33 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:36,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:46:36,779 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:46:36,784 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 08:46:36,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 08:46:36,981 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:46:36,981 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:46:36,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2068877378, now seen corresponding path program 15 times [2023-08-27 08:46:36,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:46:36,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783030504] [2023-08-27 08:46:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:46:36,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:46:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:46:37,642 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:46:37,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:46:37,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783030504] [2023-08-27 08:46:37,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783030504] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:46:37,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194409110] [2023-08-27 08:46:37,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:46:37,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:46:37,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:46:37,644 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 08:46:37,645 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 08:46:38,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-27 08:46:38,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:46:38,017 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-27 08:46:38,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:46:38,494 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:46:38,510 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:46:38,510 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 17 treesize of output 10 [2023-08-27 08:46:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:46:38,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:46:38,710 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:46:38,711 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 28 treesize of output 11 [2023-08-27 08:46:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:46:38,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194409110] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:46:38,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:46:38,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 41 [2023-08-27 08:46:38,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388869931] [2023-08-27 08:46:38,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:46:38,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-27 08:46:38,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:46:38,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-27 08:46:38,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2023-08-27 08:46:38,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 261 [2023-08-27 08:46:38,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1316 transitions, 30206 flow. Second operand has 43 states, 43 states have (on average 74.6046511627907) internal successors, (3208), 43 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:46:38,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:46:38,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 261 [2023-08-27 08:46:38,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:48:01,878 INFO L124 PetriNetUnfolderBase]: 93797/173444 cut-off events. [2023-08-27 08:48:01,878 INFO L125 PetriNetUnfolderBase]: For 3455343/3455343 co-relation queries the response was YES. [2023-08-27 08:48:06,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1438859 conditions, 173444 events. 93797/173444 cut-off events. For 3455343/3455343 co-relation queries the response was YES. Maximal size of possible extension queue 7738. Compared 1973716 event pairs, 14254 based on Foata normal form. 161/173605 useless extension candidates. Maximal degree in co-relation 1438736. Up to 100637 conditions per place. [2023-08-27 08:48:07,032 INFO L140 encePairwiseOnDemand]: 254/261 looper letters, 3384 selfloop transitions, 6507 changer transitions 462/10353 dead transitions. [2023-08-27 08:48:07,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 10353 transitions, 238400 flow [2023-08-27 08:48:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2023-08-27 08:48:07,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2023-08-27 08:48:07,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 17572 transitions. [2023-08-27 08:48:07,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3116929189726125 [2023-08-27 08:48:07,048 INFO L72 ComplementDD]: Start complementDD. Operand 216 states and 17572 transitions. [2023-08-27 08:48:07,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 216 states and 17572 transitions. [2023-08-27 08:48:07,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:48:07,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 216 states and 17572 transitions. [2023-08-27 08:48:07,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 217 states, 216 states have (on average 81.35185185185185) internal successors, (17572), 216 states have internal predecessors, (17572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:07,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 217 states, 217 states have (on average 261.0) internal successors, (56637), 217 states have internal predecessors, (56637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:07,123 INFO L81 ComplementDD]: Finished complementDD. Result has 217 states, 217 states have (on average 261.0) internal successors, (56637), 217 states have internal predecessors, (56637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:48:07,124 INFO L175 Difference]: Start difference. First operand has 392 places, 1316 transitions, 30206 flow. Second operand 216 states and 17572 transitions. [2023-08-27 08:48:07,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 10353 transitions, 238400 flow [2023-08-27 08:49:29,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 10353 transitions, 236740 flow, removed 825 selfloop flow, removed 21 redundant places. [2023-08-27 08:49:29,748 INFO L231 Difference]: Finished difference. Result has 651 places, 7504 transitions, 195223 flow [2023-08-27 08:49:29,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=29744, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=216, PETRI_FLOW=195223, PETRI_PLACES=651, PETRI_TRANSITIONS=7504} [2023-08-27 08:49:29,749 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 618 predicate places. [2023-08-27 08:49:29,749 INFO L495 AbstractCegarLoop]: Abstraction has has 651 places, 7504 transitions, 195223 flow [2023-08-27 08:49:29,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 74.6046511627907) internal successors, (3208), 43 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:29,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:49:29,750 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:49:29,755 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 08:49:29,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:49:29,951 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 08:49:29,951 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:49:29,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1593283454, now seen corresponding path program 16 times [2023-08-27 08:49:29,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:49:29,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595707503] [2023-08-27 08:49:29,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:49:29,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:49:29,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:49:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:49:30,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:49:30,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595707503] [2023-08-27 08:49:30,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595707503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:49:30,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550474117] [2023-08-27 08:49:30,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:49:30,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:49:30,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:49:30,733 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 08:49:30,735 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 08:49:30,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:49:30,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:49:30,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-27 08:49:30,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:49:31,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:49:31,109 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 08:49:31,261 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-27 08:49:31,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:49:31,442 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_971 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_971) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16)))) is different from false [2023-08-27 08:49:31,451 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:49:31,451 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 47 treesize of output 35 [2023-08-27 08:49:31,459 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 08:49:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-27 08:49:31,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550474117] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:49:31,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:49:31,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 42 [2023-08-27 08:49:31,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716335172] [2023-08-27 08:49:31,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:49:31,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-27 08:49:31,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:49:31,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-27 08:49:31,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1685, Unknown=1, NotChecked=82, Total=1892 [2023-08-27 08:49:31,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 261 [2023-08-27 08:49:31,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 7504 transitions, 195223 flow. Second operand has 44 states, 44 states have (on average 77.52272727272727) internal successors, (3411), 44 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:49:31,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:49:31,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 261 [2023-08-27 08:49:31,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-27 08:57:36,715 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 08:57:36,715 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 08:57:37,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-27 08:57:37,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown