/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 15:06:22,725 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 15:06:22,762 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 15:06:22,765 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 15:06:22,766 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 15:06:22,782 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 15:06:22,783 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 15:06:22,783 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 15:06:22,784 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 15:06:22,784 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 15:06:22,784 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 15:06:22,784 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 15:06:22,785 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 15:06:22,785 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 15:06:22,785 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 15:06:22,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 15:06:22,785 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 15:06:22,786 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 15:06:22,786 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 15:06:22,786 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 15:06:22,786 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 15:06:22,787 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 15:06:22,787 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 15:06:22,787 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 15:06:22,787 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 15:06:22,787 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 15:06:22,788 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 15:06:22,788 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 15:06:22,788 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 15:06:22,788 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 15:06:22,788 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 15:06:22,789 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 15:06:22,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 15:06:22,789 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 15:06:22,789 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 15:06:22,789 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 15:06:23,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 15:06:23,051 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 15:06:23,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 15:06:23,054 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 15:06:23,054 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 15:06:23,055 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-27 15:06:24,186 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 15:06:24,326 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 15:06:24,326 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-simple-queue.wvr.c [2023-08-27 15:06:24,333 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dc47973f/95220b5789de42dc8b7f865d1703a649/FLAG358e5d808 [2023-08-27 15:06:24,343 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9dc47973f/95220b5789de42dc8b7f865d1703a649 [2023-08-27 15:06:24,347 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 15:06:24,348 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 15:06:24,350 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 15:06:24,350 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 15:06:24,352 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 15:06:24,353 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:06:24" (1/1) ... [2023-08-27 15:06:24,354 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@457f7d55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:06:24, skipping insertion in model container [2023-08-27 15:06:24,354 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:06:24" (1/1) ... [2023-08-27 15:06:24,370 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 15:06:24,502 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 15:06:24,511 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 15:06:24,539 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 15:06:24,545 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 15:06:24,545 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 15:06:24,549 INFO L206 MainTranslator]: Completed translation [2023-08-27 15:06:24,550 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:06:24 WrapperNode [2023-08-27 15:06:24,550 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 15:06:24,551 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 15:06:24,551 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 15:06:24,551 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 15:06:24,555 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:06:24" (1/1) ... [2023-08-27 15:06:24,566 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:06:24" (1/1) ... [2023-08-27 15:06:24,588 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 142 [2023-08-27 15:06:24,588 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 15:06:24,589 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 15:06:24,589 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 15:06:24,589 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 15:06:24,594 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:06:24" (1/1) ... [2023-08-27 15:06:24,594 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:06:24" (1/1) ... [2023-08-27 15:06:24,603 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:06:24" (1/1) ... [2023-08-27 15:06:24,604 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:06:24" (1/1) ... [2023-08-27 15:06:24,612 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:06:24" (1/1) ... [2023-08-27 15:06:24,614 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:06:24" (1/1) ... [2023-08-27 15:06:24,614 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:06:24" (1/1) ... [2023-08-27 15:06:24,615 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:06:24" (1/1) ... [2023-08-27 15:06:24,616 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 15:06:24,622 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 15:06:24,623 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 15:06:24,623 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 15:06:24,626 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:06:24" (1/1) ... [2023-08-27 15:06:24,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 15:06:24,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:06:24,657 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 15:06:24,664 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 15:06:24,699 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 15:06:24,699 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 15:06:24,699 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 15:06:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 15:06:24,700 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 15:06:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 15:06:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 15:06:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 15:06:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 15:06:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 15:06:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 15:06:24,700 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 15:06:24,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 15:06:24,701 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 15:06:24,701 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 15:06:24,702 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 15:06:24,760 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 15:06:24,761 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 15:06:24,904 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 15:06:24,957 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 15:06:24,957 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 15:06:24,958 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:06:24 BoogieIcfgContainer [2023-08-27 15:06:24,958 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 15:06:24,960 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 15:06:24,960 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 15:06:24,961 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 15:06:24,961 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 03:06:24" (1/3) ... [2023-08-27 15:06:24,962 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a7ec66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 03:06:24, skipping insertion in model container [2023-08-27 15:06:24,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:06:24" (2/3) ... [2023-08-27 15:06:24,962 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70a7ec66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 03:06:24, skipping insertion in model container [2023-08-27 15:06:24,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:06:24" (3/3) ... [2023-08-27 15:06:24,963 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-queue.wvr.c [2023-08-27 15:06:24,973 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 15:06:24,973 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-08-27 15:06:24,973 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 15:06:25,030 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 15:06:25,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 125 transitions, 266 flow [2023-08-27 15:06:25,128 INFO L124 PetriNetUnfolderBase]: 9/123 cut-off events. [2023-08-27 15:06:25,129 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 15:06:25,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 123 events. 9/123 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 94 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2023-08-27 15:06:25,133 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 125 transitions, 266 flow [2023-08-27 15:06:25,137 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 114 transitions, 240 flow [2023-08-27 15:06:25,141 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 15:06:25,150 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 112 places, 114 transitions, 240 flow [2023-08-27 15:06:25,153 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 112 places, 114 transitions, 240 flow [2023-08-27 15:06:25,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 114 transitions, 240 flow [2023-08-27 15:06:25,183 INFO L124 PetriNetUnfolderBase]: 9/114 cut-off events. [2023-08-27 15:06:25,183 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 15:06:25,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 114 events. 9/114 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 93 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 88. Up to 2 conditions per place. [2023-08-27 15:06:25,185 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-27 15:06:28,930 INFO L134 LiptonReduction]: Checked pairs total: 719 [2023-08-27 15:06:28,930 INFO L136 LiptonReduction]: Total number of compositions: 128 [2023-08-27 15:06:28,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 15:06:28,944 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;@88d2b6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 15:06:28,944 INFO L358 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2023-08-27 15:06:28,945 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 15:06:28,945 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 15:06:28,945 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 15:06:28,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:28,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 15:06:28,946 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:28,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:28,949 INFO L85 PathProgramCache]: Analyzing trace with hash 17734, now seen corresponding path program 1 times [2023-08-27 15:06:28,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:28,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927275110] [2023-08-27 15:06:28,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:28,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:29,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:29,094 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 15:06:29,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:29,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927275110] [2023-08-27 15:06:29,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927275110] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:06:29,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:06:29,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 15:06:29,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768159675] [2023-08-27 15:06:29,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:06:29,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:06:29,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:29,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:06:29,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:06:29,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 253 [2023-08-27 15:06:29,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:29,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 253 [2023-08-27 15:06:29,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:29,166 INFO L124 PetriNetUnfolderBase]: 42/79 cut-off events. [2023-08-27 15:06:29,166 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 15:06:29,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174 conditions, 79 events. 42/79 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 148 event pairs, 24 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 120. Up to 79 conditions per place. [2023-08-27 15:06:29,167 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 18 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-08-27 15:06:29,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 96 flow [2023-08-27 15:06:29,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:06:29,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:06:29,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 325 transitions. [2023-08-27 15:06:29,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281949934123847 [2023-08-27 15:06:29,176 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 325 transitions. [2023-08-27 15:06:29,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 325 transitions. [2023-08-27 15:06:29,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:29,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 325 transitions. [2023-08-27 15:06:29,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,184 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,185 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 325 transitions. [2023-08-27 15:06:29,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 96 flow [2023-08-27 15:06:29,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 15:06:29,187 INFO L231 Difference]: Finished difference. Result has 22 places, 21 transitions, 63 flow [2023-08-27 15:06:29,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=63, PETRI_PLACES=22, PETRI_TRANSITIONS=21} [2023-08-27 15:06:29,190 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -3 predicate places. [2023-08-27 15:06:29,191 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 21 transitions, 63 flow [2023-08-27 15:06:29,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:29,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 15:06:29,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 15:06:29,191 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:29,192 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:29,192 INFO L85 PathProgramCache]: Analyzing trace with hash 550853, now seen corresponding path program 1 times [2023-08-27 15:06:29,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:29,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83246378] [2023-08-27 15:06:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:29,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:29,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:29,266 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 15:06:29,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:29,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83246378] [2023-08-27 15:06:29,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83246378] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:06:29,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228979396] [2023-08-27 15:06:29,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:29,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:29,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:06:29,270 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 15:06:29,271 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 15:06:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:29,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 15:06:29,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:06:29,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:06:29,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:06:29,429 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 15:06:29,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228979396] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:06:29,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:06:29,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-08-27 15:06:29,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533119559] [2023-08-27 15:06:29,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:06:29,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 15:06:29,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:29,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 15:06:29,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-27 15:06:29,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 253 [2023-08-27 15:06:29,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 21 transitions, 63 flow. Second operand has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:29,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 253 [2023-08-27 15:06:29,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:29,489 INFO L124 PetriNetUnfolderBase]: 48/88 cut-off events. [2023-08-27 15:06:29,489 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 15:06:29,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 88 events. 48/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 172 event pairs, 24 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 148. Up to 81 conditions per place. [2023-08-27 15:06:29,490 INFO L140 encePairwiseOnDemand]: 248/253 looper letters, 17 selfloop transitions, 13 changer transitions 0/30 dead transitions. [2023-08-27 15:06:29,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 30 transitions, 159 flow [2023-08-27 15:06:29,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 15:06:29,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 15:06:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 633 transitions. [2023-08-27 15:06:29,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41699604743083 [2023-08-27 15:06:29,493 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 633 transitions. [2023-08-27 15:06:29,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 633 transitions. [2023-08-27 15:06:29,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:29,493 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 633 transitions. [2023-08-27 15:06:29,494 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.5) internal successors, (633), 6 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,497 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,497 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,497 INFO L175 Difference]: Start difference. First operand has 22 places, 21 transitions, 63 flow. Second operand 6 states and 633 transitions. [2023-08-27 15:06:29,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 30 transitions, 159 flow [2023-08-27 15:06:29,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 154 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 15:06:29,498 INFO L231 Difference]: Finished difference. Result has 29 places, 30 transitions, 142 flow [2023-08-27 15:06:29,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=58, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=142, PETRI_PLACES=29, PETRI_TRANSITIONS=30} [2023-08-27 15:06:29,499 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-27 15:06:29,499 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 30 transitions, 142 flow [2023-08-27 15:06:29,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.0) internal successors, (606), 6 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:29,500 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-27 15:06:29,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 15:06:29,700 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 15:06:29,700 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:29,701 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:29,701 INFO L85 PathProgramCache]: Analyzing trace with hash 17077158, now seen corresponding path program 1 times [2023-08-27 15:06:29,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:29,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823810400] [2023-08-27 15:06:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:29,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:29,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:06:29,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:29,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823810400] [2023-08-27 15:06:29,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823810400] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:06:29,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:06:29,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:06:29,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610469255] [2023-08-27 15:06:29,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:06:29,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:06:29,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:29,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:06:29,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:06:29,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 253 [2023-08-27 15:06:29,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 30 transitions, 142 flow. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:29,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 253 [2023-08-27 15:06:29,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:29,788 INFO L124 PetriNetUnfolderBase]: 45/84 cut-off events. [2023-08-27 15:06:29,788 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 15:06:29,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 84 events. 45/84 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 164 event pairs, 24 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 174. Up to 78 conditions per place. [2023-08-27 15:06:29,789 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 20 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2023-08-27 15:06:29,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 26 transitions, 167 flow [2023-08-27 15:06:29,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:06:29,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:06:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 319 transitions. [2023-08-27 15:06:29,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42028985507246375 [2023-08-27 15:06:29,806 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 319 transitions. [2023-08-27 15:06:29,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 319 transitions. [2023-08-27 15:06:29,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:29,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 319 transitions. [2023-08-27 15:06:29,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,808 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,808 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,808 INFO L175 Difference]: Start difference. First operand has 29 places, 30 transitions, 142 flow. Second operand 3 states and 319 transitions. [2023-08-27 15:06:29,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 26 transitions, 167 flow [2023-08-27 15:06:29,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 146 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 15:06:29,809 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 106 flow [2023-08-27 15:06:29,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2023-08-27 15:06:29,810 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-27 15:06:29,810 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 106 flow [2023-08-27 15:06:29,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:29,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 15:06:29,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 15:06:29,811 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:29,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:29,811 INFO L85 PathProgramCache]: Analyzing trace with hash 17068569, now seen corresponding path program 1 times [2023-08-27 15:06:29,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:29,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436392160] [2023-08-27 15:06:29,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:29,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:29,904 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 15:06:29,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:29,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436392160] [2023-08-27 15:06:29,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436392160] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:06:29,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:06:29,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:06:29,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296908196] [2023-08-27 15:06:29,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:06:29,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 15:06:29,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:29,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 15:06:29,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 15:06:29,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 253 [2023-08-27 15:06:29,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:29,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 253 [2023-08-27 15:06:29,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:29,951 INFO L124 PetriNetUnfolderBase]: 53/111 cut-off events. [2023-08-27 15:06:29,951 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-27 15:06:29,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 111 events. 53/111 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 276 event pairs, 33 based on Foata normal form. 0/79 useless extension candidates. Maximal degree in co-relation 230. Up to 83 conditions per place. [2023-08-27 15:06:29,952 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 33 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-08-27 15:06:29,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 202 flow [2023-08-27 15:06:29,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 15:06:29,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 15:06:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 406 transitions. [2023-08-27 15:06:29,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40118577075098816 [2023-08-27 15:06:29,953 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 406 transitions. [2023-08-27 15:06:29,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 406 transitions. [2023-08-27 15:06:29,953 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:29,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 406 transitions. [2023-08-27 15:06:29,954 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 101.5) internal successors, (406), 4 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,956 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,956 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 106 flow. Second operand 4 states and 406 transitions. [2023-08-27 15:06:29,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 36 transitions, 202 flow [2023-08-27 15:06:29,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 36 transitions, 190 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 15:06:29,966 INFO L231 Difference]: Finished difference. Result has 31 places, 26 transitions, 109 flow [2023-08-27 15:06:29,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=109, PETRI_PLACES=31, PETRI_TRANSITIONS=26} [2023-08-27 15:06:29,966 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2023-08-27 15:06:29,967 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 26 transitions, 109 flow [2023-08-27 15:06:29,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:29,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:29,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 15:06:29,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 15:06:29,967 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:29,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:29,968 INFO L85 PathProgramCache]: Analyzing trace with hash 529384396, now seen corresponding path program 1 times [2023-08-27 15:06:29,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:29,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405489211] [2023-08-27 15:06:29,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:29,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:30,028 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 15:06:30,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:30,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405489211] [2023-08-27 15:06:30,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405489211] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:06:30,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218945708] [2023-08-27 15:06:30,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:30,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:30,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:06:30,030 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 15:06:30,032 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 15:06:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:30,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 15:06:30,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:06:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:06:30,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:06:30,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218945708] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:06:30,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 15:06:30,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 15:06:30,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310874204] [2023-08-27 15:06:30,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:06:30,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:06:30,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:30,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:06:30,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 15:06:30,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 253 [2023-08-27 15:06:30,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 26 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:30,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:30,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 253 [2023-08-27 15:06:30,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:30,142 INFO L124 PetriNetUnfolderBase]: 34/78 cut-off events. [2023-08-27 15:06:30,142 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 15:06:30,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 78 events. 34/78 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 166 event pairs, 18 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 174. Up to 78 conditions per place. [2023-08-27 15:06:30,142 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 23 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-27 15:06:30,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 24 transitions, 149 flow [2023-08-27 15:06:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:06:30,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:06:30,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 333 transitions. [2023-08-27 15:06:30,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43873517786561267 [2023-08-27 15:06:30,144 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 333 transitions. [2023-08-27 15:06:30,144 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 333 transitions. [2023-08-27 15:06:30,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:30,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 333 transitions. [2023-08-27 15:06:30,144 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:30,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:30,146 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:30,146 INFO L175 Difference]: Start difference. First operand has 31 places, 26 transitions, 109 flow. Second operand 3 states and 333 transitions. [2023-08-27 15:06:30,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 24 transitions, 149 flow [2023-08-27 15:06:30,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 24 transitions, 144 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 15:06:30,149 INFO L231 Difference]: Finished difference. Result has 29 places, 24 transitions, 98 flow [2023-08-27 15:06:30,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=29, PETRI_TRANSITIONS=24} [2023-08-27 15:06:30,151 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 4 predicate places. [2023-08-27 15:06:30,151 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 24 transitions, 98 flow [2023-08-27 15:06:30,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:30,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:30,151 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 15:06:30,170 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 15:06:30,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:30,357 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:30,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:30,358 INFO L85 PathProgramCache]: Analyzing trace with hash -768685550, now seen corresponding path program 2 times [2023-08-27 15:06:30,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:30,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253043509] [2023-08-27 15:06:30,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:30,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:30,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:30,438 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 15:06:30,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:30,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253043509] [2023-08-27 15:06:30,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253043509] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:06:30,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747192658] [2023-08-27 15:06:30,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:06:30,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:30,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:06:30,440 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 15:06:30,471 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 15:06:30,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 15:06:30,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:06:30,493 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 15:06:30,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:06:30,503 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 15:06:30,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:06:30,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747192658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:06:30,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 15:06:30,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 15:06:30,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902582084] [2023-08-27 15:06:30,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:06:30,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:06:30,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:30,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:06:30,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 15:06:30,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 253 [2023-08-27 15:06:30,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:30,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:30,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 253 [2023-08-27 15:06:30,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:30,530 INFO L124 PetriNetUnfolderBase]: 34/77 cut-off events. [2023-08-27 15:06:30,530 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 15:06:30,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 200 conditions, 77 events. 34/77 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 159 event pairs, 18 based on Foata normal form. 1/77 useless extension candidates. Maximal degree in co-relation 187. Up to 77 conditions per place. [2023-08-27 15:06:30,533 INFO L140 encePairwiseOnDemand]: 251/253 looper letters, 22 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-27 15:06:30,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 23 transitions, 134 flow [2023-08-27 15:06:30,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:06:30,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:06:30,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 319 transitions. [2023-08-27 15:06:30,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42028985507246375 [2023-08-27 15:06:30,534 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 319 transitions. [2023-08-27 15:06:30,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 319 transitions. [2023-08-27 15:06:30,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:30,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 319 transitions. [2023-08-27 15:06:30,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:30,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:30,536 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:30,536 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 98 flow. Second operand 3 states and 319 transitions. [2023-08-27 15:06:30,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 23 transitions, 134 flow [2023-08-27 15:06:30,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 23 transitions, 117 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-27 15:06:30,539 INFO L231 Difference]: Finished difference. Result has 25 places, 23 transitions, 73 flow [2023-08-27 15:06:30,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=71, 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=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=25, PETRI_TRANSITIONS=23} [2023-08-27 15:06:30,541 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2023-08-27 15:06:30,541 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 73 flow [2023-08-27 15:06:30,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:30,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:30,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:06:30,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-27 15:06:30,745 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 15:06:30,746 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:30,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:30,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1105625562, now seen corresponding path program 1 times [2023-08-27 15:06:30,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:30,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881312363] [2023-08-27 15:06:30,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:30,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:30,829 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 15:06:30,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:30,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881312363] [2023-08-27 15:06:30,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881312363] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:06:30,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:06:30,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 15:06:30,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371879321] [2023-08-27 15:06:30,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:06:30,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:06:30,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:30,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:06:30,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:06:30,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 253 [2023-08-27 15:06:30,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 23 transitions, 73 flow. Second operand has 3 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 15:06:30,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:30,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 253 [2023-08-27 15:06:30,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:30,863 INFO L124 PetriNetUnfolderBase]: 50/105 cut-off events. [2023-08-27 15:06:30,863 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-27 15:06:30,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 253 conditions, 105 events. 50/105 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 252 event pairs, 18 based on Foata normal form. 2/106 useless extension candidates. Maximal degree in co-relation 243. Up to 69 conditions per place. [2023-08-27 15:06:30,863 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 26 selfloop transitions, 2 changer transitions 3/31 dead transitions. [2023-08-27 15:06:30,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 31 transitions, 157 flow [2023-08-27 15:06:30,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:06:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:06:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2023-08-27 15:06:30,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44664031620553357 [2023-08-27 15:06:30,865 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2023-08-27 15:06:30,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2023-08-27 15:06:30,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:30,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2023-08-27 15:06:30,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:30,866 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:30,866 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:30,866 INFO L175 Difference]: Start difference. First operand has 25 places, 23 transitions, 73 flow. Second operand 3 states and 339 transitions. [2023-08-27 15:06:30,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 31 transitions, 157 flow [2023-08-27 15:06:30,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 31 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:06:30,867 INFO L231 Difference]: Finished difference. Result has 27 places, 23 transitions, 80 flow [2023-08-27 15:06:30,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=23} [2023-08-27 15:06:30,868 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-08-27 15:06:30,868 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 23 transitions, 80 flow [2023-08-27 15:06:30,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 15:06:30,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:30,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:06:30,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 15:06:30,868 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:30,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:30,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1304590821, now seen corresponding path program 1 times [2023-08-27 15:06:30,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:30,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034489598] [2023-08-27 15:06:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:30,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:30,982 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 15:06:30,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:30,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034489598] [2023-08-27 15:06:30,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034489598] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:06:30,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:06:30,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:06:30,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131252142] [2023-08-27 15:06:30,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:06:30,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:06:30,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:30,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:06:30,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:06:30,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 253 [2023-08-27 15:06:30,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 23 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:30,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:30,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 253 [2023-08-27 15:06:30,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:31,019 INFO L124 PetriNetUnfolderBase]: 55/109 cut-off events. [2023-08-27 15:06:31,019 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2023-08-27 15:06:31,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 109 events. 55/109 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 264 event pairs, 17 based on Foata normal form. 6/114 useless extension candidates. Maximal degree in co-relation 273. Up to 74 conditions per place. [2023-08-27 15:06:31,020 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 25 selfloop transitions, 2 changer transitions 5/32 dead transitions. [2023-08-27 15:06:31,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 32 transitions, 167 flow [2023-08-27 15:06:31,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:06:31,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:06:31,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 328 transitions. [2023-08-27 15:06:31,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4321475625823452 [2023-08-27 15:06:31,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 328 transitions. [2023-08-27 15:06:31,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 328 transitions. [2023-08-27 15:06:31,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:31,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 328 transitions. [2023-08-27 15:06:31,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:31,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:31,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 253.0) internal successors, (1012), 4 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:31,023 INFO L175 Difference]: Start difference. First operand has 27 places, 23 transitions, 80 flow. Second operand 3 states and 328 transitions. [2023-08-27 15:06:31,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 32 transitions, 167 flow [2023-08-27 15:06:31,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 32 transitions, 165 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:06:31,024 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 92 flow [2023-08-27 15:06:31,024 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2023-08-27 15:06:31,025 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 3 predicate places. [2023-08-27 15:06:31,025 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 92 flow [2023-08-27 15:06:31,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:31,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:31,025 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:06:31,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 15:06:31,025 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:31,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:31,026 INFO L85 PathProgramCache]: Analyzing trace with hash 210331694, now seen corresponding path program 1 times [2023-08-27 15:06:31,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:31,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035003307] [2023-08-27 15:06:31,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:31,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:31,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:31,319 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 15:06:31,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:31,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035003307] [2023-08-27 15:06:31,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035003307] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:06:31,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854146684] [2023-08-27 15:06:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:31,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:31,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:06:31,325 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 15:06:31,373 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 15:06:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:31,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 15:06:31,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:06:31,503 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:06:31,542 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 15:06:31,565 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 15:06:31,631 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 15:06:31,632 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:06:31,847 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:06:31,847 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 15:06:31,857 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:06:31,858 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 140 treesize of output 127 [2023-08-27 15:06:31,890 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 15:06:31,890 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 124 treesize of output 100 [2023-08-27 15:06:31,898 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 15:06:31,898 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 79 treesize of output 67 [2023-08-27 15:06:31,943 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 15:06:31,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854146684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:06:31,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:06:31,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2023-08-27 15:06:31,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109621230] [2023-08-27 15:06:31,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:06:31,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 15:06:31,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:31,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 15:06:31,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=206, Unknown=2, NotChecked=0, Total=272 [2023-08-27 15:06:31,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 253 [2023-08-27 15:06:31,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 92 flow. Second operand has 17 states, 17 states have (on average 71.05882352941177) internal successors, (1208), 17 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:31,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:31,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 253 [2023-08-27 15:06:31,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:34,271 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:06:36,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:06:36,544 INFO L124 PetriNetUnfolderBase]: 255/496 cut-off events. [2023-08-27 15:06:36,544 INFO L125 PetriNetUnfolderBase]: For 292/292 co-relation queries the response was YES. [2023-08-27 15:06:36,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1374 conditions, 496 events. 255/496 cut-off events. For 292/292 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2293 event pairs, 34 based on Foata normal form. 3/498 useless extension candidates. Maximal degree in co-relation 1360. Up to 144 conditions per place. [2023-08-27 15:06:36,546 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 69 selfloop transitions, 29 changer transitions 27/125 dead transitions. [2023-08-27 15:06:36,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 125 transitions, 675 flow [2023-08-27 15:06:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 15:06:36,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 15:06:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1297 transitions. [2023-08-27 15:06:36,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30155777726110206 [2023-08-27 15:06:36,550 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1297 transitions. [2023-08-27 15:06:36,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1297 transitions. [2023-08-27 15:06:36,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:36,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1297 transitions. [2023-08-27 15:06:36,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 76.29411764705883) internal successors, (1297), 17 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:36,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 253.0) internal successors, (4554), 18 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:36,556 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 253.0) internal successors, (4554), 18 states have internal predecessors, (4554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:36,557 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 92 flow. Second operand 17 states and 1297 transitions. [2023-08-27 15:06:36,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 125 transitions, 675 flow [2023-08-27 15:06:36,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 125 transitions, 656 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-27 15:06:36,559 INFO L231 Difference]: Finished difference. Result has 48 places, 47 transitions, 306 flow [2023-08-27 15:06:36,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=306, PETRI_PLACES=48, PETRI_TRANSITIONS=47} [2023-08-27 15:06:36,559 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 23 predicate places. [2023-08-27 15:06:36,559 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 47 transitions, 306 flow [2023-08-27 15:06:36,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 71.05882352941177) internal successors, (1208), 17 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:36,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:36,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:06:36,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-27 15:06:36,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:36,764 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:36,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:36,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1738663932, now seen corresponding path program 2 times [2023-08-27 15:06:36,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:36,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668272773] [2023-08-27 15:06:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:36,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:37,162 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 15:06:37,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:37,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668272773] [2023-08-27 15:06:37,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668272773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:06:37,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339255513] [2023-08-27 15:06:37,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:06:37,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:37,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:06:37,163 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 15:06:37,165 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 15:06:37,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:06:37,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:06:37,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 15:06:37,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:06:37,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:06:37,287 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 15:06:37,309 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 15:06:37,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:06:37,326 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_220 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_220) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2023-08-27 15:06:37,336 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:06:37,336 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-27 15:06:37,339 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 9 treesize of output 3 [2023-08-27 15:06:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-27 15:06:37,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339255513] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:06:37,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:06:37,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2023-08-27 15:06:37,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146736051] [2023-08-27 15:06:37,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:06:37,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 15:06:37,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:37,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 15:06:37,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=149, Unknown=1, NotChecked=24, Total=210 [2023-08-27 15:06:37,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 15:06:37,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 306 flow. Second operand has 15 states, 15 states have (on average 74.26666666666667) internal successors, (1114), 15 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:37,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:37,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 15:06:37,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:37,781 INFO L124 PetriNetUnfolderBase]: 387/727 cut-off events. [2023-08-27 15:06:37,781 INFO L125 PetriNetUnfolderBase]: For 1478/1478 co-relation queries the response was YES. [2023-08-27 15:06:37,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2452 conditions, 727 events. 387/727 cut-off events. For 1478/1478 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3564 event pairs, 73 based on Foata normal form. 3/729 useless extension candidates. Maximal degree in co-relation 2432. Up to 199 conditions per place. [2023-08-27 15:06:37,785 INFO L140 encePairwiseOnDemand]: 242/253 looper letters, 55 selfloop transitions, 36 changer transitions 18/109 dead transitions. [2023-08-27 15:06:37,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 109 transitions, 799 flow [2023-08-27 15:06:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 15:06:37,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 15:06:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 872 transitions. [2023-08-27 15:06:37,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31333093783686666 [2023-08-27 15:06:37,788 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 872 transitions. [2023-08-27 15:06:37,788 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 872 transitions. [2023-08-27 15:06:37,788 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:37,788 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 872 transitions. [2023-08-27 15:06:37,790 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 79.27272727272727) internal successors, (872), 11 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:37,792 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 253.0) internal successors, (3036), 12 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:37,792 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 253.0) internal successors, (3036), 12 states have internal predecessors, (3036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:37,793 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 306 flow. Second operand 11 states and 872 transitions. [2023-08-27 15:06:37,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 109 transitions, 799 flow [2023-08-27 15:06:37,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 109 transitions, 749 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-08-27 15:06:37,798 INFO L231 Difference]: Finished difference. Result has 58 places, 65 transitions, 531 flow [2023-08-27 15:06:37,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=531, PETRI_PLACES=58, PETRI_TRANSITIONS=65} [2023-08-27 15:06:37,799 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 33 predicate places. [2023-08-27 15:06:37,799 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 65 transitions, 531 flow [2023-08-27 15:06:37,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 74.26666666666667) internal successors, (1114), 15 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:37,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:37,799 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:06:37,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-27 15:06:38,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-27 15:06:38,004 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:38,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:38,005 INFO L85 PathProgramCache]: Analyzing trace with hash -792622776, now seen corresponding path program 3 times [2023-08-27 15:06:38,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:38,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670769288] [2023-08-27 15:06:38,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:38,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:06:38,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:38,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670769288] [2023-08-27 15:06:38,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670769288] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:06:38,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190265083] [2023-08-27 15:06:38,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:06:38,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:38,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:06:38,117 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 15:06:38,157 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 15:06:38,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 15:06:38,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:06:38,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 15:06:38,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:06:38,247 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:06:38,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:06:38,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:06:38,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190265083] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:06:38,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:06:38,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 4] total 8 [2023-08-27 15:06:38,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439852841] [2023-08-27 15:06:38,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:06:38,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 15:06:38,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:38,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 15:06:38,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-08-27 15:06:38,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 253 [2023-08-27 15:06:38,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 65 transitions, 531 flow. Second operand has 9 states, 9 states have (on average 105.55555555555556) internal successors, (950), 9 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:38,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:38,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 253 [2023-08-27 15:06:38,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:38,421 INFO L124 PetriNetUnfolderBase]: 501/973 cut-off events. [2023-08-27 15:06:38,421 INFO L125 PetriNetUnfolderBase]: For 3573/3573 co-relation queries the response was YES. [2023-08-27 15:06:38,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4365 conditions, 973 events. 501/973 cut-off events. For 3573/3573 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5275 event pairs, 154 based on Foata normal form. 36/1008 useless extension candidates. Maximal degree in co-relation 4341. Up to 523 conditions per place. [2023-08-27 15:06:38,425 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 59 selfloop transitions, 28 changer transitions 2/89 dead transitions. [2023-08-27 15:06:38,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 89 transitions, 897 flow [2023-08-27 15:06:38,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 15:06:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 15:06:38,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 441 transitions. [2023-08-27 15:06:38,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357707509881423 [2023-08-27 15:06:38,426 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 441 transitions. [2023-08-27 15:06:38,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 441 transitions. [2023-08-27 15:06:38,427 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:38,427 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 441 transitions. [2023-08-27 15:06:38,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.25) internal successors, (441), 4 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:38,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:38,429 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 253.0) internal successors, (1265), 5 states have internal predecessors, (1265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:38,429 INFO L175 Difference]: Start difference. First operand has 58 places, 65 transitions, 531 flow. Second operand 4 states and 441 transitions. [2023-08-27 15:06:38,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 89 transitions, 897 flow [2023-08-27 15:06:38,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 828 flow, removed 17 selfloop flow, removed 6 redundant places. [2023-08-27 15:06:38,436 INFO L231 Difference]: Finished difference. Result has 57 places, 70 transitions, 674 flow [2023-08-27 15:06:38,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=437, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=674, PETRI_PLACES=57, PETRI_TRANSITIONS=70} [2023-08-27 15:06:38,436 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 32 predicate places. [2023-08-27 15:06:38,436 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 70 transitions, 674 flow [2023-08-27 15:06:38,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 105.55555555555556) internal successors, (950), 9 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:38,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:38,437 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:06:38,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-27 15:06:38,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:38,642 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:38,642 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:38,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1361963249, now seen corresponding path program 4 times [2023-08-27 15:06:38,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:38,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791708656] [2023-08-27 15:06:38,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:38,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:06:38,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:38,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791708656] [2023-08-27 15:06:38,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791708656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:06:38,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886841965] [2023-08-27 15:06:38,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:06:38,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:38,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:06:38,766 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 15:06:38,767 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 15:06:38,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:06:38,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:06:38,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 15:06:38,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:06:38,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:06:38,881 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:06:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:06:38,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886841965] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:06:38,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:06:38,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-27 15:06:38,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788924584] [2023-08-27 15:06:38,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:06:38,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 15:06:38,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:38,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 15:06:38,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-27 15:06:38,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 253 [2023-08-27 15:06:38,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 70 transitions, 674 flow. Second operand has 12 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 15:06:38,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:38,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 253 [2023-08-27 15:06:38,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:39,063 INFO L124 PetriNetUnfolderBase]: 328/677 cut-off events. [2023-08-27 15:06:39,063 INFO L125 PetriNetUnfolderBase]: For 2733/2733 co-relation queries the response was YES. [2023-08-27 15:06:39,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3161 conditions, 677 events. 328/677 cut-off events. For 2733/2733 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3503 event pairs, 205 based on Foata normal form. 23/699 useless extension candidates. Maximal degree in co-relation 3137. Up to 534 conditions per place. [2023-08-27 15:06:39,067 INFO L140 encePairwiseOnDemand]: 249/253 looper letters, 44 selfloop transitions, 3 changer transitions 24/71 dead transitions. [2023-08-27 15:06:39,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 71 transitions, 721 flow [2023-08-27 15:06:39,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 15:06:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 15:06:39,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 584 transitions. [2023-08-27 15:06:39,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3847167325428195 [2023-08-27 15:06:39,069 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 584 transitions. [2023-08-27 15:06:39,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 584 transitions. [2023-08-27 15:06:39,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:39,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 584 transitions. [2023-08-27 15:06:39,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 97.33333333333333) internal successors, (584), 6 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:39,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:39,073 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:39,073 INFO L175 Difference]: Start difference. First operand has 57 places, 70 transitions, 674 flow. Second operand 6 states and 584 transitions. [2023-08-27 15:06:39,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 71 transitions, 721 flow [2023-08-27 15:06:39,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 71 transitions, 691 flow, removed 15 selfloop flow, removed 1 redundant places. [2023-08-27 15:06:39,079 INFO L231 Difference]: Finished difference. Result has 59 places, 47 transitions, 402 flow [2023-08-27 15:06:39,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=402, PETRI_PLACES=59, PETRI_TRANSITIONS=47} [2023-08-27 15:06:39,080 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 34 predicate places. [2023-08-27 15:06:39,080 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 47 transitions, 402 flow [2023-08-27 15:06:39,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 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 15:06:39,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:39,081 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:06:39,091 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 15:06:39,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:39,286 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:39,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:39,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1914714408, now seen corresponding path program 5 times [2023-08-27 15:06:39,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:39,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353347717] [2023-08-27 15:06:39,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:39,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:06:39,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:39,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353347717] [2023-08-27 15:06:39,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353347717] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:06:39,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479373206] [2023-08-27 15:06:39,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:06:39,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:39,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:06:39,733 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 15:06:39,770 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 15:06:39,835 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:06:39,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:06:39,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-27 15:06:39,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:06:39,926 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 15:06:39,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:06:39,943 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:06:39,944 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-27 15:06:39,952 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 15:06:39,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479373206] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:06:39,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:06:39,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 13 [2023-08-27 15:06:39,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25785734] [2023-08-27 15:06:39,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:06:39,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 15:06:39,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:39,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 15:06:39,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-08-27 15:06:39,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 15:06:39,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 47 transitions, 402 flow. Second operand has 15 states, 15 states have (on average 78.26666666666667) internal successors, (1174), 15 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:39,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:39,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 15:06:39,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:40,495 INFO L124 PetriNetUnfolderBase]: 610/1159 cut-off events. [2023-08-27 15:06:40,496 INFO L125 PetriNetUnfolderBase]: For 3646/3646 co-relation queries the response was YES. [2023-08-27 15:06:40,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5338 conditions, 1159 events. 610/1159 cut-off events. For 3646/3646 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6404 event pairs, 69 based on Foata normal form. 5/1163 useless extension candidates. Maximal degree in co-relation 5313. Up to 663 conditions per place. [2023-08-27 15:06:40,500 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 95 selfloop transitions, 56 changer transitions 62/213 dead transitions. [2023-08-27 15:06:40,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 213 transitions, 1884 flow [2023-08-27 15:06:40,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 15:06:40,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 15:06:40,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2014 transitions. [2023-08-27 15:06:40,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3316864295125165 [2023-08-27 15:06:40,505 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2014 transitions. [2023-08-27 15:06:40,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2014 transitions. [2023-08-27 15:06:40,505 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:40,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2014 transitions. [2023-08-27 15:06:40,509 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 83.91666666666667) internal successors, (2014), 24 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:40,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 253.0) internal successors, (6325), 25 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:40,515 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 253.0) internal successors, (6325), 25 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:40,515 INFO L175 Difference]: Start difference. First operand has 59 places, 47 transitions, 402 flow. Second operand 24 states and 2014 transitions. [2023-08-27 15:06:40,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 213 transitions, 1884 flow [2023-08-27 15:06:40,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 213 transitions, 1684 flow, removed 97 selfloop flow, removed 7 redundant places. [2023-08-27 15:06:40,537 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 910 flow [2023-08-27 15:06:40,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=910, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2023-08-27 15:06:40,538 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 48 predicate places. [2023-08-27 15:06:40,538 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 910 flow [2023-08-27 15:06:40,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 78.26666666666667) internal successors, (1174), 15 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:40,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:40,539 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:06:40,544 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 15:06:40,743 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,SelfDestructingSolverStorable12 [2023-08-27 15:06:40,743 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:40,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:40,744 INFO L85 PathProgramCache]: Analyzing trace with hash -158062232, now seen corresponding path program 6 times [2023-08-27 15:06:40,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:40,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758733045] [2023-08-27 15:06:40,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:40,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:06:41,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:41,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758733045] [2023-08-27 15:06:41,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758733045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:06:41,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710050651] [2023-08-27 15:06:41,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:06:41,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:41,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:06:41,177 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 15:06:41,178 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 15:06:41,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 15:06:41,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:06:41,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 15:06:41,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:06:41,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:06:41,440 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 15:06:41,546 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:06:41,546 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 23 treesize of output 10 [2023-08-27 15:06:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:06:41,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:06:41,658 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:06:41,659 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 15:06:41,663 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 15:06:41,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:06:41,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710050651] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:06:41,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:06:41,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-27 15:06:41,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18400979] [2023-08-27 15:06:41,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:06:41,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 15:06:41,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:41,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 15:06:41,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=612, Unknown=2, NotChecked=0, Total=702 [2023-08-27 15:06:41,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 15:06:41,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 910 flow. Second operand has 27 states, 27 states have (on average 73.77777777777777) internal successors, (1992), 27 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:41,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:41,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 15:06:41,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:44,003 INFO L124 PetriNetUnfolderBase]: 1184/2220 cut-off events. [2023-08-27 15:06:44,004 INFO L125 PetriNetUnfolderBase]: For 9672/9672 co-relation queries the response was YES. [2023-08-27 15:06:44,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10049 conditions, 2220 events. 1184/2220 cut-off events. For 9672/9672 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13680 event pairs, 193 based on Foata normal form. 6/2225 useless extension candidates. Maximal degree in co-relation 10022. Up to 1255 conditions per place. [2023-08-27 15:06:44,013 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 153 selfloop transitions, 76 changer transitions 32/261 dead transitions. [2023-08-27 15:06:44,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 261 transitions, 2781 flow [2023-08-27 15:06:44,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 15:06:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 15:06:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1917 transitions. [2023-08-27 15:06:44,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3157114624505929 [2023-08-27 15:06:44,017 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1917 transitions. [2023-08-27 15:06:44,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1917 transitions. [2023-08-27 15:06:44,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:44,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1917 transitions. [2023-08-27 15:06:44,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 79.875) internal successors, (1917), 24 states have internal predecessors, (1917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:44,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 253.0) internal successors, (6325), 25 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:44,026 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 253.0) internal successors, (6325), 25 states have internal predecessors, (6325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:44,026 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 910 flow. Second operand 24 states and 1917 transitions. [2023-08-27 15:06:44,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 261 transitions, 2781 flow [2023-08-27 15:06:44,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 261 transitions, 2374 flow, removed 138 selfloop flow, removed 7 redundant places. [2023-08-27 15:06:44,039 INFO L231 Difference]: Finished difference. Result has 97 places, 134 transitions, 1604 flow [2023-08-27 15:06:44,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=717, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1604, PETRI_PLACES=97, PETRI_TRANSITIONS=134} [2023-08-27 15:06:44,040 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 72 predicate places. [2023-08-27 15:06:44,040 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 134 transitions, 1604 flow [2023-08-27 15:06:44,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 73.77777777777777) internal successors, (1992), 27 states have internal predecessors, (1992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:44,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:44,040 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:06:44,047 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 15:06:44,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-27 15:06:44,245 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:44,245 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:44,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1605527576, now seen corresponding path program 7 times [2023-08-27 15:06:44,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:44,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121217700] [2023-08-27 15:06:44,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:44,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:44,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:06:44,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:44,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121217700] [2023-08-27 15:06:44,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121217700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:06:44,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345245541] [2023-08-27 15:06:44,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 15:06:44,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:44,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:06:44,361 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 15:06:44,425 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 15:06:44,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:44,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 15:06:44,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:06:44,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:06:44,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:06:44,721 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:06:44,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345245541] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:06:44,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:06:44,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 19 [2023-08-27 15:06:44,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072855849] [2023-08-27 15:06:44,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:06:44,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 15:06:44,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:44,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 15:06:44,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2023-08-27 15:06:44,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 253 [2023-08-27 15:06:44,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 134 transitions, 1604 flow. Second operand has 20 states, 20 states have (on average 91.5) internal successors, (1830), 20 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:44,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:44,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 253 [2023-08-27 15:06:44,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:45,107 INFO L124 PetriNetUnfolderBase]: 1226/2349 cut-off events. [2023-08-27 15:06:45,108 INFO L125 PetriNetUnfolderBase]: For 9023/9023 co-relation queries the response was YES. [2023-08-27 15:06:45,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10028 conditions, 2349 events. 1226/2349 cut-off events. For 9023/9023 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15435 event pairs, 241 based on Foata normal form. 66/2414 useless extension candidates. Maximal degree in co-relation 9995. Up to 1345 conditions per place. [2023-08-27 15:06:45,120 INFO L140 encePairwiseOnDemand]: 248/253 looper letters, 64 selfloop transitions, 48 changer transitions 80/192 dead transitions. [2023-08-27 15:06:45,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 192 transitions, 2159 flow [2023-08-27 15:06:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 15:06:45,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 15:06:45,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1351 transitions. [2023-08-27 15:06:45,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3814229249011858 [2023-08-27 15:06:45,122 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1351 transitions. [2023-08-27 15:06:45,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1351 transitions. [2023-08-27 15:06:45,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:45,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1351 transitions. [2023-08-27 15:06:45,126 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 96.5) internal successors, (1351), 14 states have internal predecessors, (1351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:45,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 253.0) internal successors, (3795), 15 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:45,129 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 253.0) internal successors, (3795), 15 states have internal predecessors, (3795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:45,130 INFO L175 Difference]: Start difference. First operand has 97 places, 134 transitions, 1604 flow. Second operand 14 states and 1351 transitions. [2023-08-27 15:06:45,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 192 transitions, 2159 flow [2023-08-27 15:06:45,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 192 transitions, 1997 flow, removed 72 selfloop flow, removed 9 redundant places. [2023-08-27 15:06:45,153 INFO L231 Difference]: Finished difference. Result has 96 places, 86 transitions, 1063 flow [2023-08-27 15:06:45,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1063, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2023-08-27 15:06:45,153 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 71 predicate places. [2023-08-27 15:06:45,154 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 1063 flow [2023-08-27 15:06:45,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 91.5) internal successors, (1830), 20 states have internal predecessors, (1830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:45,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:45,154 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:06:45,161 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 15:06:45,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 15:06:45,359 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:45,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:45,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1020150131, now seen corresponding path program 8 times [2023-08-27 15:06:45,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:45,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806122584] [2023-08-27 15:06:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:45,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:45,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:45,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:06:45,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:45,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806122584] [2023-08-27 15:06:45,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806122584] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:06:45,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695284813] [2023-08-27 15:06:45,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:06:45,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:45,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:06:45,990 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 15:06:46,018 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 15:06:46,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:06:46,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:06:46,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 15:06:46,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:06:46,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:06:46,220 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 15:06:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:06:46,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:06:46,305 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:06:46,306 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 15:06:46,312 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 15:06:46,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:06:46,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695284813] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:06:46,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:06:46,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 22 [2023-08-27 15:06:46,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541855049] [2023-08-27 15:06:46,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:06:46,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 15:06:46,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:46,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 15:06:46,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=483, Unknown=2, NotChecked=0, Total=552 [2023-08-27 15:06:46,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 15:06:46,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 1063 flow. Second operand has 24 states, 24 states have (on average 73.58333333333333) internal successors, (1766), 24 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:46,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:46,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 15:06:46,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:47,020 INFO L124 PetriNetUnfolderBase]: 1089/2039 cut-off events. [2023-08-27 15:06:47,020 INFO L125 PetriNetUnfolderBase]: For 7591/7591 co-relation queries the response was YES. [2023-08-27 15:06:47,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9193 conditions, 2039 events. 1089/2039 cut-off events. For 7591/7591 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 12669 event pairs, 164 based on Foata normal form. 4/2042 useless extension candidates. Maximal degree in co-relation 9168. Up to 1161 conditions per place. [2023-08-27 15:06:47,028 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 75 selfloop transitions, 75 changer transitions 35/185 dead transitions. [2023-08-27 15:06:47,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 185 transitions, 2086 flow [2023-08-27 15:06:47,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 15:06:47,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 15:06:47,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1261 transitions. [2023-08-27 15:06:47,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3115118577075099 [2023-08-27 15:06:47,030 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1261 transitions. [2023-08-27 15:06:47,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1261 transitions. [2023-08-27 15:06:47,030 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:47,030 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1261 transitions. [2023-08-27 15:06:47,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 78.8125) internal successors, (1261), 16 states have internal predecessors, (1261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:47,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 253.0) internal successors, (4301), 17 states have internal predecessors, (4301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:47,035 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 253.0) internal successors, (4301), 17 states have internal predecessors, (4301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:47,035 INFO L175 Difference]: Start difference. First operand has 96 places, 86 transitions, 1063 flow. Second operand 16 states and 1261 transitions. [2023-08-27 15:06:47,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 185 transitions, 2086 flow [2023-08-27 15:06:47,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 185 transitions, 1952 flow, removed 63 selfloop flow, removed 8 redundant places. [2023-08-27 15:06:47,052 INFO L231 Difference]: Finished difference. Result has 79 places, 103 transitions, 1380 flow [2023-08-27 15:06:47,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=975, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1380, PETRI_PLACES=79, PETRI_TRANSITIONS=103} [2023-08-27 15:06:47,053 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 54 predicate places. [2023-08-27 15:06:47,053 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 103 transitions, 1380 flow [2023-08-27 15:06:47,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 73.58333333333333) internal successors, (1766), 24 states have internal predecessors, (1766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:47,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:47,053 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:06:47,060 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 15:06:47,257 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 15:06:47,258 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:47,258 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:47,258 INFO L85 PathProgramCache]: Analyzing trace with hash -998655186, now seen corresponding path program 9 times [2023-08-27 15:06:47,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:47,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805657169] [2023-08-27 15:06:47,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:47,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:47,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:47,674 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 15:06:47,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:47,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805657169] [2023-08-27 15:06:47,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805657169] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:06:47,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540617912] [2023-08-27 15:06:47,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:06:47,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:47,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:06:47,702 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 15:06:47,703 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 15:06:47,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 15:06:47,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:06:47,849 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 15:06:47,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:06:48,163 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:06:48,163 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 23 treesize of output 10 [2023-08-27 15:06:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:06:48,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:06:48,376 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:06:48,377 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 24 treesize of output 11 [2023-08-27 15:06:48,628 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:06:48,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540617912] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:06:48,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:06:48,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2023-08-27 15:06:48,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956688407] [2023-08-27 15:06:48,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:06:48,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 15:06:48,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:48,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 15:06:48,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2023-08-27 15:06:48,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 15:06:48,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 103 transitions, 1380 flow. Second operand has 32 states, 32 states have (on average 77.78125) internal successors, (2489), 32 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:48,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:48,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 15:06:48,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:51,802 INFO L124 PetriNetUnfolderBase]: 2328/4463 cut-off events. [2023-08-27 15:06:51,802 INFO L125 PetriNetUnfolderBase]: For 17169/17169 co-relation queries the response was YES. [2023-08-27 15:06:51,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19602 conditions, 4463 events. 2328/4463 cut-off events. For 17169/17169 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32904 event pairs, 428 based on Foata normal form. 126/4587 useless extension candidates. Maximal degree in co-relation 19579. Up to 2532 conditions per place. [2023-08-27 15:06:51,818 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 166 selfloop transitions, 52 changer transitions 295/513 dead transitions. [2023-08-27 15:06:51,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 513 transitions, 5319 flow [2023-08-27 15:06:51,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-27 15:06:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-27 15:06:51,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4189 transitions. [2023-08-27 15:06:51,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3311462450592885 [2023-08-27 15:06:51,822 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4189 transitions. [2023-08-27 15:06:51,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4189 transitions. [2023-08-27 15:06:51,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:51,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4189 transitions. [2023-08-27 15:06:51,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 83.78) internal successors, (4189), 50 states have internal predecessors, (4189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:51,834 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 253.0) internal successors, (12903), 51 states have internal predecessors, (12903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:51,835 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 253.0) internal successors, (12903), 51 states have internal predecessors, (12903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:51,835 INFO L175 Difference]: Start difference. First operand has 79 places, 103 transitions, 1380 flow. Second operand 50 states and 4189 transitions. [2023-08-27 15:06:51,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 513 transitions, 5319 flow [2023-08-27 15:06:51,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 513 transitions, 5110 flow, removed 81 selfloop flow, removed 7 redundant places. [2023-08-27 15:06:51,863 INFO L231 Difference]: Finished difference. Result has 153 places, 115 transitions, 1700 flow [2023-08-27 15:06:51,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=1700, PETRI_PLACES=153, PETRI_TRANSITIONS=115} [2023-08-27 15:06:51,864 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 128 predicate places. [2023-08-27 15:06:51,864 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 115 transitions, 1700 flow [2023-08-27 15:06:51,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 77.78125) internal successors, (2489), 32 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:51,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:51,865 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:06:51,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-27 15:06:52,069 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 15:06:52,069 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:06:52,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:52,069 INFO L85 PathProgramCache]: Analyzing trace with hash -814934460, now seen corresponding path program 10 times [2023-08-27 15:06:52,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:52,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434118101] [2023-08-27 15:06:52,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:52,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:06:52,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:52,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434118101] [2023-08-27 15:06:52,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434118101] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:06:52,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959356960] [2023-08-27 15:06:52,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:06:52,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:52,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:06:52,599 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 15:06:52,601 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 15:06:52,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:06:52,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:06:52,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 15:06:52,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:06:53,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:06:53,008 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 15:06:53,136 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:06:53,137 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 23 treesize of output 10 [2023-08-27 15:06:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:06:53,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:06:53,218 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_499 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_499) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)) 5)) is different from false [2023-08-27 15:06:53,230 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:06:53,230 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 15:06:53,238 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 15:06:53,633 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-08-27 15:06:53,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959356960] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:06:53,633 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:06:53,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 34 [2023-08-27 15:06:53,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622165680] [2023-08-27 15:06:53,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:06:53,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-27 15:06:53,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:53,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-27 15:06:53,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1045, Unknown=1, NotChecked=66, Total=1260 [2023-08-27 15:06:53,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 15:06:53,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 115 transitions, 1700 flow. Second operand has 36 states, 36 states have (on average 73.58333333333333) internal successors, (2649), 36 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:53,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:53,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 15:06:53,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:07:05,600 INFO L124 PetriNetUnfolderBase]: 1430/2860 cut-off events. [2023-08-27 15:07:05,600 INFO L125 PetriNetUnfolderBase]: For 17267/17267 co-relation queries the response was YES. [2023-08-27 15:07:05,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13090 conditions, 2860 events. 1430/2860 cut-off events. For 17267/17267 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 19932 event pairs, 303 based on Foata normal form. 19/2877 useless extension candidates. Maximal degree in co-relation 13035. Up to 1699 conditions per place. [2023-08-27 15:07:05,614 INFO L140 encePairwiseOnDemand]: 244/253 looper letters, 167 selfloop transitions, 54 changer transitions 205/426 dead transitions. [2023-08-27 15:07:05,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 426 transitions, 4412 flow [2023-08-27 15:07:05,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-27 15:07:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-27 15:07:05,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 4110 transitions. [2023-08-27 15:07:05,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3124049863180298 [2023-08-27 15:07:05,619 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 4110 transitions. [2023-08-27 15:07:05,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 4110 transitions. [2023-08-27 15:07:05,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:07:05,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 4110 transitions. [2023-08-27 15:07:05,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 79.03846153846153) internal successors, (4110), 52 states have internal predecessors, (4110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:05,640 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 253.0) internal successors, (13409), 53 states have internal predecessors, (13409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:05,642 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 253.0) internal successors, (13409), 53 states have internal predecessors, (13409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:05,642 INFO L175 Difference]: Start difference. First operand has 153 places, 115 transitions, 1700 flow. Second operand 52 states and 4110 transitions. [2023-08-27 15:07:05,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 426 transitions, 4412 flow [2023-08-27 15:07:05,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 426 transitions, 3753 flow, removed 308 selfloop flow, removed 26 redundant places. [2023-08-27 15:07:05,706 INFO L231 Difference]: Finished difference. Result has 183 places, 120 transitions, 1633 flow [2023-08-27 15:07:05,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=1364, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=1633, PETRI_PLACES=183, PETRI_TRANSITIONS=120} [2023-08-27 15:07:05,707 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 158 predicate places. [2023-08-27 15:07:05,707 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 120 transitions, 1633 flow [2023-08-27 15:07:05,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 73.58333333333333) internal successors, (2649), 36 states have internal predecessors, (2649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:05,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:07:05,708 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:07:05,715 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 15:07:05,912 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 15:07:05,913 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:07:05,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:07:05,913 INFO L85 PathProgramCache]: Analyzing trace with hash 2086222852, now seen corresponding path program 11 times [2023-08-27 15:07:05,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:07:05,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306944890] [2023-08-27 15:07:05,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:07:05,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:07:05,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:07:06,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:07:06,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306944890] [2023-08-27 15:07:06,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306944890] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:07:06,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630164089] [2023-08-27 15:07:06,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:07:06,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:07:06,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:07:06,348 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 15:07:06,365 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 15:07:06,473 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 15:07:06,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:07:06,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 15:07:06,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:07:06,722 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:07:06,722 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 23 treesize of output 10 [2023-08-27 15:07:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:07:06,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:07:06,846 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:07:06,846 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 11 [2023-08-27 15:07:07,000 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 15:07:07,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630164089] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:07:07,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:07:07,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 26 [2023-08-27 15:07:07,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901013204] [2023-08-27 15:07:07,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:07:07,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 15:07:07,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:07:07,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 15:07:07,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2023-08-27 15:07:07,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 15:07:07,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 120 transitions, 1633 flow. Second operand has 28 states, 28 states have (on average 77.64285714285714) internal successors, (2174), 28 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:07,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:07:07,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 15:07:07,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:07:08,235 INFO L124 PetriNetUnfolderBase]: 1026/1965 cut-off events. [2023-08-27 15:07:08,236 INFO L125 PetriNetUnfolderBase]: For 32418/32418 co-relation queries the response was YES. [2023-08-27 15:07:08,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15050 conditions, 1965 events. 1026/1965 cut-off events. For 32418/32418 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 12237 event pairs, 249 based on Foata normal form. 25/1989 useless extension candidates. Maximal degree in co-relation 14984. Up to 1113 conditions per place. [2023-08-27 15:07:08,248 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 70 selfloop transitions, 23 changer transitions 105/198 dead transitions. [2023-08-27 15:07:08,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 198 transitions, 2902 flow [2023-08-27 15:07:08,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 15:07:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 15:07:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1883 transitions. [2023-08-27 15:07:08,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3235951194363293 [2023-08-27 15:07:08,250 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1883 transitions. [2023-08-27 15:07:08,250 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1883 transitions. [2023-08-27 15:07:08,250 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:07:08,250 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1883 transitions. [2023-08-27 15:07:08,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 81.8695652173913) internal successors, (1883), 23 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:08,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 253.0) internal successors, (6072), 24 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:08,255 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 253.0) internal successors, (6072), 24 states have internal predecessors, (6072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:08,255 INFO L175 Difference]: Start difference. First operand has 183 places, 120 transitions, 1633 flow. Second operand 23 states and 1883 transitions. [2023-08-27 15:07:08,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 198 transitions, 2902 flow [2023-08-27 15:07:08,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 198 transitions, 2081 flow, removed 377 selfloop flow, removed 44 redundant places. [2023-08-27 15:07:08,316 INFO L231 Difference]: Finished difference. Result has 116 places, 70 transitions, 855 flow [2023-08-27 15:07:08,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=1020, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=855, PETRI_PLACES=116, PETRI_TRANSITIONS=70} [2023-08-27 15:07:08,316 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 91 predicate places. [2023-08-27 15:07:08,317 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 70 transitions, 855 flow [2023-08-27 15:07:08,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 77.64285714285714) internal successors, (2174), 28 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:08,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:07:08,317 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:07:08,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-27 15:07:08,521 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 15:07:08,521 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:07:08,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:07:08,522 INFO L85 PathProgramCache]: Analyzing trace with hash 521823214, now seen corresponding path program 12 times [2023-08-27 15:07:08,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:07:08,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828244001] [2023-08-27 15:07:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:07:08,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:07:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:08,893 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 15:07:08,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:07:08,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828244001] [2023-08-27 15:07:08,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828244001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:07:08,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153867477] [2023-08-27 15:07:08,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:07:08,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:07:08,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:07:08,895 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 15:07:08,896 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 15:07:09,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 15:07:09,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:07:09,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-27 15:07:09,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:07:09,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 15:07:09,147 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:07:09,161 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:07:09,161 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 24 treesize of output 11 [2023-08-27 15:07:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 15:07:09,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153867477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:07:09,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:07:09,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2023-08-27 15:07:09,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865353221] [2023-08-27 15:07:09,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:07:09,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 15:07:09,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:07:09,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 15:07:09,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2023-08-27 15:07:09,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 15:07:09,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 70 transitions, 855 flow. Second operand has 17 states, 17 states have (on average 78.17647058823529) internal successors, (1329), 17 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:09,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:07:09,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 15:07:09,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:07:10,005 INFO L124 PetriNetUnfolderBase]: 838/1594 cut-off events. [2023-08-27 15:07:10,006 INFO L125 PetriNetUnfolderBase]: For 7504/7504 co-relation queries the response was YES. [2023-08-27 15:07:10,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7104 conditions, 1594 events. 838/1594 cut-off events. For 7504/7504 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 9254 event pairs, 63 based on Foata normal form. 8/1601 useless extension candidates. Maximal degree in co-relation 7066. Up to 892 conditions per place. [2023-08-27 15:07:10,014 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 88 selfloop transitions, 68 changer transitions 63/219 dead transitions. [2023-08-27 15:07:10,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 219 transitions, 2196 flow [2023-08-27 15:07:10,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 15:07:10,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 15:07:10,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2310 transitions. [2023-08-27 15:07:10,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32608695652173914 [2023-08-27 15:07:10,031 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2310 transitions. [2023-08-27 15:07:10,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2310 transitions. [2023-08-27 15:07:10,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:07:10,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2310 transitions. [2023-08-27 15:07:10,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 82.5) internal successors, (2310), 28 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:10,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 253.0) internal successors, (7337), 29 states have internal predecessors, (7337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:10,037 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 253.0) internal successors, (7337), 29 states have internal predecessors, (7337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:10,037 INFO L175 Difference]: Start difference. First operand has 116 places, 70 transitions, 855 flow. Second operand 28 states and 2310 transitions. [2023-08-27 15:07:10,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 219 transitions, 2196 flow [2023-08-27 15:07:10,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 219 transitions, 2064 flow, removed 34 selfloop flow, removed 23 redundant places. [2023-08-27 15:07:10,052 INFO L231 Difference]: Finished difference. Result has 121 places, 86 transitions, 1219 flow [2023-08-27 15:07:10,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=1219, PETRI_PLACES=121, PETRI_TRANSITIONS=86} [2023-08-27 15:07:10,052 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 96 predicate places. [2023-08-27 15:07:10,052 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 86 transitions, 1219 flow [2023-08-27 15:07:10,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 78.17647058823529) internal successors, (1329), 17 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:10,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:07:10,052 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:07:10,057 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 15:07:10,257 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 15:07:10,257 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:07:10,257 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:07:10,257 INFO L85 PathProgramCache]: Analyzing trace with hash 244383985, now seen corresponding path program 13 times [2023-08-27 15:07:10,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:07:10,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069980105] [2023-08-27 15:07:10,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:07:10,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:07:10,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:11,027 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:07:11,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:07:11,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069980105] [2023-08-27 15:07:11,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069980105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:07:11,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005884637] [2023-08-27 15:07:11,028 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 15:07:11,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:07:11,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:07:11,029 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 15:07:11,031 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 15:07:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:11,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 15:07:11,127 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:07:11,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:07:11,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 15:07:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:07:11,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:07:11,397 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_618 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_618) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)))) is different from false [2023-08-27 15:07:11,406 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:07:11,406 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 15:07:11,414 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 15:07:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 3 not checked. [2023-08-27 15:07:11,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005884637] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:07:11,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:07:11,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 29 [2023-08-27 15:07:11,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759285212] [2023-08-27 15:07:11,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:07:11,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 15:07:11,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:07:11,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 15:07:11,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=790, Unknown=1, NotChecked=56, Total=930 [2023-08-27 15:07:11,526 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 15:07:11,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 86 transitions, 1219 flow. Second operand has 31 states, 31 states have (on average 73.61290322580645) internal successors, (2282), 31 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:11,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:07:11,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 15:07:11,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:07:12,980 INFO L124 PetriNetUnfolderBase]: 1759/3162 cut-off events. [2023-08-27 15:07:12,980 INFO L125 PetriNetUnfolderBase]: For 18218/18218 co-relation queries the response was YES. [2023-08-27 15:07:12,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15173 conditions, 3162 events. 1759/3162 cut-off events. For 18218/18218 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 20083 event pairs, 121 based on Foata normal form. 15/3177 useless extension candidates. Maximal degree in co-relation 15131. Up to 1815 conditions per place. [2023-08-27 15:07:12,996 INFO L140 encePairwiseOnDemand]: 242/253 looper letters, 71 selfloop transitions, 150 changer transitions 53/274 dead transitions. [2023-08-27 15:07:12,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 274 transitions, 3495 flow [2023-08-27 15:07:12,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 15:07:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 15:07:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1975 transitions. [2023-08-27 15:07:12,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31225296442687744 [2023-08-27 15:07:12,998 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1975 transitions. [2023-08-27 15:07:12,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1975 transitions. [2023-08-27 15:07:12,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:07:12,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1975 transitions. [2023-08-27 15:07:13,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 79.0) internal successors, (1975), 25 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:13,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 253.0) internal successors, (6578), 26 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:13,004 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 253.0) internal successors, (6578), 26 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:13,004 INFO L175 Difference]: Start difference. First operand has 121 places, 86 transitions, 1219 flow. Second operand 25 states and 1975 transitions. [2023-08-27 15:07:13,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 274 transitions, 3495 flow [2023-08-27 15:07:13,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 274 transitions, 3107 flow, removed 107 selfloop flow, removed 16 redundant places. [2023-08-27 15:07:13,042 INFO L231 Difference]: Finished difference. Result has 126 places, 167 transitions, 2730 flow [2023-08-27 15:07:13,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=976, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=2730, PETRI_PLACES=126, PETRI_TRANSITIONS=167} [2023-08-27 15:07:13,042 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 101 predicate places. [2023-08-27 15:07:13,042 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 167 transitions, 2730 flow [2023-08-27 15:07:13,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 73.61290322580645) internal successors, (2282), 31 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:13,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:07:13,043 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:07:13,049 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 15:07:13,247 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 15:07:13,247 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:07:13,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:07:13,248 INFO L85 PathProgramCache]: Analyzing trace with hash 115055065, now seen corresponding path program 14 times [2023-08-27 15:07:13,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:07:13,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127784028] [2023-08-27 15:07:13,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:07:13,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:07:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:07:13,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:07:13,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127784028] [2023-08-27 15:07:13,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127784028] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:07:13,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706902649] [2023-08-27 15:07:13,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:07:13,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:07:13,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:07:13,335 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 15:07:13,337 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 15:07:13,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:07:13,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:07:13,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 15:07:13,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:07:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:07:13,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:07:13,560 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:07:13,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706902649] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:07:13,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:07:13,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 8] total 13 [2023-08-27 15:07:13,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550192730] [2023-08-27 15:07:13,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:07:13,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 15:07:13,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:07:13,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 15:07:13,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2023-08-27 15:07:13,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 253 [2023-08-27 15:07:13,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 167 transitions, 2730 flow. Second operand has 14 states, 14 states have (on average 107.0) internal successors, (1498), 14 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:13,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:07:13,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 253 [2023-08-27 15:07:13,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:07:14,118 INFO L124 PetriNetUnfolderBase]: 2671/4946 cut-off events. [2023-08-27 15:07:14,118 INFO L125 PetriNetUnfolderBase]: For 41388/41388 co-relation queries the response was YES. [2023-08-27 15:07:14,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29467 conditions, 4946 events. 2671/4946 cut-off events. For 41388/41388 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 35413 event pairs, 545 based on Foata normal form. 12/4958 useless extension candidates. Maximal degree in co-relation 29418. Up to 2741 conditions per place. [2023-08-27 15:07:14,147 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 101 selfloop transitions, 170 changer transitions 2/273 dead transitions. [2023-08-27 15:07:14,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 273 transitions, 5121 flow [2023-08-27 15:07:14,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 15:07:14,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 15:07:14,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 681 transitions. [2023-08-27 15:07:14,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44861660079051385 [2023-08-27 15:07:14,148 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 681 transitions. [2023-08-27 15:07:14,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 681 transitions. [2023-08-27 15:07:14,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:07:14,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 681 transitions. [2023-08-27 15:07:14,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 113.5) internal successors, (681), 6 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:14,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:14,150 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 253.0) internal successors, (1771), 7 states have internal predecessors, (1771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:14,150 INFO L175 Difference]: Start difference. First operand has 126 places, 167 transitions, 2730 flow. Second operand 6 states and 681 transitions. [2023-08-27 15:07:14,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 273 transitions, 5121 flow [2023-08-27 15:07:14,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 273 transitions, 4770 flow, removed 168 selfloop flow, removed 6 redundant places. [2023-08-27 15:07:14,295 INFO L231 Difference]: Finished difference. Result has 126 places, 240 transitions, 4347 flow [2023-08-27 15:07:14,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4347, PETRI_PLACES=126, PETRI_TRANSITIONS=240} [2023-08-27 15:07:14,296 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 101 predicate places. [2023-08-27 15:07:14,296 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 240 transitions, 4347 flow [2023-08-27 15:07:14,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 107.0) internal successors, (1498), 14 states have internal predecessors, (1498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:14,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:07:14,296 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:07:14,317 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-27 15:07:14,517 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 15:07:14,517 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:07:14,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:07:14,518 INFO L85 PathProgramCache]: Analyzing trace with hash 147406238, now seen corresponding path program 15 times [2023-08-27 15:07:14,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:07:14,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004723012] [2023-08-27 15:07:14,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:07:14,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:07:14,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:14,983 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:07:14,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:07:14,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004723012] [2023-08-27 15:07:14,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004723012] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:07:14,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045070803] [2023-08-27 15:07:14,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:07:14,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:07:14,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:07:14,985 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 15:07:15,013 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 15:07:15,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 15:07:15,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:07:15,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 15:07:15,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:07:15,410 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:07:15,411 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 23 treesize of output 10 [2023-08-27 15:07:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-27 15:07:15,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:07:15,527 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:07:15,528 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 24 treesize of output 11 [2023-08-27 15:07:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:07:15,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045070803] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:07:15,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:07:15,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 9] total 29 [2023-08-27 15:07:15,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720089652] [2023-08-27 15:07:15,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:07:15,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 15:07:15,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:07:15,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 15:07:15,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=741, Unknown=0, NotChecked=0, Total=930 [2023-08-27 15:07:15,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 15:07:15,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 240 transitions, 4347 flow. Second operand has 31 states, 31 states have (on average 77.74193548387096) internal successors, (2410), 31 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:15,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:07:15,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 15:07:15,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:07:19,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-27 15:07:21,550 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:07:23,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:07:26,284 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:07:27,879 INFO L124 PetriNetUnfolderBase]: 3047/5817 cut-off events. [2023-08-27 15:07:27,880 INFO L125 PetriNetUnfolderBase]: For 52417/52417 co-relation queries the response was YES. [2023-08-27 15:07:27,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34926 conditions, 5817 events. 3047/5817 cut-off events. For 52417/52417 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 44571 event pairs, 257 based on Foata normal form. 175/5992 useless extension candidates. Maximal degree in co-relation 34875. Up to 2949 conditions per place. [2023-08-27 15:07:27,905 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 45 selfloop transitions, 23 changer transitions 755/823 dead transitions. [2023-08-27 15:07:27,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 823 transitions, 10250 flow [2023-08-27 15:07:27,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-08-27 15:07:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-08-27 15:07:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 7289 transitions. [2023-08-27 15:07:27,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3311526055154241 [2023-08-27 15:07:27,939 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 7289 transitions. [2023-08-27 15:07:27,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 7289 transitions. [2023-08-27 15:07:27,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:07:27,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 7289 transitions. [2023-08-27 15:07:27,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 83.7816091954023) internal successors, (7289), 87 states have internal predecessors, (7289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:27,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 253.0) internal successors, (22264), 88 states have internal predecessors, (22264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:27,964 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 253.0) internal successors, (22264), 88 states have internal predecessors, (22264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:27,964 INFO L175 Difference]: Start difference. First operand has 126 places, 240 transitions, 4347 flow. Second operand 87 states and 7289 transitions. [2023-08-27 15:07:27,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 823 transitions, 10250 flow [2023-08-27 15:07:28,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 823 transitions, 9854 flow, removed 198 selfloop flow, removed 0 redundant places. [2023-08-27 15:07:28,081 INFO L231 Difference]: Finished difference. Result has 234 places, 42 transitions, 687 flow [2023-08-27 15:07:28,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=4059, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=687, PETRI_PLACES=234, PETRI_TRANSITIONS=42} [2023-08-27 15:07:28,082 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 209 predicate places. [2023-08-27 15:07:28,082 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 42 transitions, 687 flow [2023-08-27 15:07:28,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 77.74193548387096) internal successors, (2410), 31 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:28,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:07:28,082 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:07:28,087 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-08-27 15:07:28,284 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 15:07:28,285 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:07:28,285 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:07:28,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1959047422, now seen corresponding path program 16 times [2023-08-27 15:07:28,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:07:28,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538491488] [2023-08-27 15:07:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:07:28,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:07:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:07:28,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:07:28,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538491488] [2023-08-27 15:07:28,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538491488] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:07:28,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069208656] [2023-08-27 15:07:28,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:07:28,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:07:28,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:07:28,961 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 15:07:28,973 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 15:07:29,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:07:29,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:07:29,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-27 15:07:29,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:07:29,427 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 15:07:29,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:07:29,537 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:07:29,537 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-27 15:07:29,809 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 15:07:29,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069208656] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:07:29,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:07:29,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2023-08-27 15:07:29,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083249720] [2023-08-27 15:07:29,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:07:29,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-27 15:07:29,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:07:29,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-27 15:07:29,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1456, Unknown=0, NotChecked=0, Total=1722 [2023-08-27 15:07:29,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 15:07:29,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 42 transitions, 687 flow. Second operand has 42 states, 42 states have (on average 77.57142857142857) internal successors, (3258), 42 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:29,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:07:29,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 15:07:29,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:07:30,691 INFO L124 PetriNetUnfolderBase]: 320/648 cut-off events. [2023-08-27 15:07:30,691 INFO L125 PetriNetUnfolderBase]: For 9947/9947 co-relation queries the response was YES. [2023-08-27 15:07:30,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4412 conditions, 648 events. 320/648 cut-off events. For 9947/9947 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3138 event pairs, 25 based on Foata normal form. 2/650 useless extension candidates. Maximal degree in co-relation 4338. Up to 338 conditions per place. [2023-08-27 15:07:30,695 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 93 selfloop transitions, 34 changer transitions 42/169 dead transitions. [2023-08-27 15:07:30,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 169 transitions, 2091 flow [2023-08-27 15:07:30,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-27 15:07:30,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-27 15:07:30,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2444 transitions. [2023-08-27 15:07:30,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3220026350461133 [2023-08-27 15:07:30,700 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2444 transitions. [2023-08-27 15:07:30,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2444 transitions. [2023-08-27 15:07:30,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:07:30,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2444 transitions. [2023-08-27 15:07:30,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 81.46666666666667) internal successors, (2444), 30 states have internal predecessors, (2444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:30,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 253.0) internal successors, (7843), 31 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:30,706 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 253.0) internal successors, (7843), 31 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:30,706 INFO L175 Difference]: Start difference. First operand has 234 places, 42 transitions, 687 flow. Second operand 30 states and 2444 transitions. [2023-08-27 15:07:30,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 169 transitions, 2091 flow [2023-08-27 15:07:30,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 169 transitions, 1407 flow, removed 219 selfloop flow, removed 81 redundant places. [2023-08-27 15:07:30,726 INFO L231 Difference]: Finished difference. Result has 104 places, 52 transitions, 497 flow [2023-08-27 15:07:30,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=306, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=497, PETRI_PLACES=104, PETRI_TRANSITIONS=52} [2023-08-27 15:07:30,727 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 79 predicate places. [2023-08-27 15:07:30,727 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 52 transitions, 497 flow [2023-08-27 15:07:30,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 77.57142857142857) internal successors, (3258), 42 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:30,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:07:30,728 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:07:30,746 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 15:07:30,932 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 15:07:30,932 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:07:30,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:07:30,933 INFO L85 PathProgramCache]: Analyzing trace with hash 302415912, now seen corresponding path program 17 times [2023-08-27 15:07:30,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:07:30,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443470733] [2023-08-27 15:07:30,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:07:30,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:07:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:31,624 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 15:07:31,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:07:31,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443470733] [2023-08-27 15:07:31,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443470733] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:07:31,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949470825] [2023-08-27 15:07:31,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:07:31,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:07:31,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:07:31,629 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 15:07:31,669 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 15:07:31,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 15:07:31,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:07:31,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-27 15:07:31,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:07:31,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:07:31,987 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 15:07:32,222 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:07:32,222 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 23 treesize of output 10 [2023-08-27 15:07:32,226 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:07:32,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:07:32,436 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_787 (Array Int Int)) (v_~front~0_161 Int)) (or (<= c_~n~0 v_~front~0_161) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_787) c_~queue~0.base) (+ c_~queue~0.offset (* v_~front~0_161 4)))) (< v_~front~0_161 3) (<= c_~back~0 v_~front~0_161))) is different from false [2023-08-27 15:07:32,461 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:07:32,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 34 [2023-08-27 15:07:32,464 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 7 [2023-08-27 15:07:32,753 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 6 trivial. 4 not checked. [2023-08-27 15:07:32,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949470825] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:07:32,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:07:32,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 37 [2023-08-27 15:07:32,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709690162] [2023-08-27 15:07:32,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:07:32,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-08-27 15:07:32,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:07:32,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-08-27 15:07:32,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1253, Unknown=1, NotChecked=72, Total=1482 [2023-08-27 15:07:32,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 15:07:32,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 52 transitions, 497 flow. Second operand has 39 states, 39 states have (on average 73.58974358974359) internal successors, (2870), 39 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:32,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:07:32,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 15:07:32,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:07:34,495 INFO L124 PetriNetUnfolderBase]: 319/655 cut-off events. [2023-08-27 15:07:34,495 INFO L125 PetriNetUnfolderBase]: For 2155/2155 co-relation queries the response was YES. [2023-08-27 15:07:34,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3202 conditions, 655 events. 319/655 cut-off events. For 2155/2155 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3149 event pairs, 45 based on Foata normal form. 13/668 useless extension candidates. Maximal degree in co-relation 3168. Up to 345 conditions per place. [2023-08-27 15:07:34,498 INFO L140 encePairwiseOnDemand]: 242/253 looper letters, 32 selfloop transitions, 10 changer transitions 66/108 dead transitions. [2023-08-27 15:07:34,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 108 transitions, 1022 flow [2023-08-27 15:07:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 15:07:34,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 15:07:34,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1459 transitions. [2023-08-27 15:07:34,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3035157062617017 [2023-08-27 15:07:34,500 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1459 transitions. [2023-08-27 15:07:34,500 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1459 transitions. [2023-08-27 15:07:34,500 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:07:34,500 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1459 transitions. [2023-08-27 15:07:34,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 76.78947368421052) internal successors, (1459), 19 states have internal predecessors, (1459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:34,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 253.0) internal successors, (5060), 20 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:34,512 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 253.0) internal successors, (5060), 20 states have internal predecessors, (5060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:34,512 INFO L175 Difference]: Start difference. First operand has 104 places, 52 transitions, 497 flow. Second operand 19 states and 1459 transitions. [2023-08-27 15:07:34,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 108 transitions, 1022 flow [2023-08-27 15:07:34,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 108 transitions, 965 flow, removed 3 selfloop flow, removed 19 redundant places. [2023-08-27 15:07:34,517 INFO L231 Difference]: Finished difference. Result has 107 places, 38 transitions, 369 flow [2023-08-27 15:07:34,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=369, PETRI_PLACES=107, PETRI_TRANSITIONS=38} [2023-08-27 15:07:34,517 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 82 predicate places. [2023-08-27 15:07:34,517 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 38 transitions, 369 flow [2023-08-27 15:07:34,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 73.58974358974359) internal successors, (2870), 39 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:34,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:07:34,518 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:07:34,522 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 15:07:34,722 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 15:07:34,722 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:07:34,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:07:34,722 INFO L85 PathProgramCache]: Analyzing trace with hash -961480101, now seen corresponding path program 18 times [2023-08-27 15:07:34,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:07:34,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600851815] [2023-08-27 15:07:34,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:07:34,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:07:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:07:35,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:07:35,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600851815] [2023-08-27 15:07:35,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600851815] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:07:35,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468524211] [2023-08-27 15:07:35,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:07:35,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:07:35,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:07:35,690 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 15:07:35,722 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 15:07:36,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 15:07:36,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:07:36,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 15:07:36,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:07:36,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:07:36,431 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 15:07:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:07:36,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:07:36,617 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:07:36,617 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 15:07:36,622 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 15:07:36,786 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-27 15:07:36,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468524211] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:07:36,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:07:36,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 11] total 36 [2023-08-27 15:07:36,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483022603] [2023-08-27 15:07:36,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:07:36,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-27 15:07:36,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:07:36,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-27 15:07:36,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1297, Unknown=4, NotChecked=0, Total=1406 [2023-08-27 15:07:36,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 15:07:36,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 38 transitions, 369 flow. Second operand has 38 states, 38 states have (on average 73.5) internal successors, (2793), 38 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:36,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:07:36,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 15:07:36,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:07:37,911 INFO L124 PetriNetUnfolderBase]: 347/662 cut-off events. [2023-08-27 15:07:37,912 INFO L125 PetriNetUnfolderBase]: For 3305/3305 co-relation queries the response was YES. [2023-08-27 15:07:37,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3758 conditions, 662 events. 347/662 cut-off events. For 3305/3305 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2976 event pairs, 36 based on Foata normal form. 1/663 useless extension candidates. Maximal degree in co-relation 3720. Up to 367 conditions per place. [2023-08-27 15:07:37,914 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 68 selfloop transitions, 36 changer transitions 34/138 dead transitions. [2023-08-27 15:07:37,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 138 transitions, 1396 flow [2023-08-27 15:07:37,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 15:07:37,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 15:07:37,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1928 transitions. [2023-08-27 15:07:37,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3048221343873518 [2023-08-27 15:07:37,916 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1928 transitions. [2023-08-27 15:07:37,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1928 transitions. [2023-08-27 15:07:37,917 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:07:37,917 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1928 transitions. [2023-08-27 15:07:37,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 77.12) internal successors, (1928), 25 states have internal predecessors, (1928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:37,921 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 253.0) internal successors, (6578), 26 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:37,922 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 253.0) internal successors, (6578), 26 states have internal predecessors, (6578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:37,922 INFO L175 Difference]: Start difference. First operand has 107 places, 38 transitions, 369 flow. Second operand 25 states and 1928 transitions. [2023-08-27 15:07:37,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 138 transitions, 1396 flow [2023-08-27 15:07:37,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 138 transitions, 1127 flow, removed 121 selfloop flow, removed 17 redundant places. [2023-08-27 15:07:37,929 INFO L231 Difference]: Finished difference. Result has 90 places, 52 transitions, 526 flow [2023-08-27 15:07:37,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=526, PETRI_PLACES=90, PETRI_TRANSITIONS=52} [2023-08-27 15:07:37,930 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 65 predicate places. [2023-08-27 15:07:37,930 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 52 transitions, 526 flow [2023-08-27 15:07:37,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 73.5) internal successors, (2793), 38 states have internal predecessors, (2793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:37,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:07:37,930 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:07:37,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-27 15:07:38,134 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 15:07:38,135 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:07:38,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:07:38,135 INFO L85 PathProgramCache]: Analyzing trace with hash 258182427, now seen corresponding path program 19 times [2023-08-27 15:07:38,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:07:38,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753114777] [2023-08-27 15:07:38,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:07:38,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:07:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-27 15:07:38,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:07:38,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753114777] [2023-08-27 15:07:38,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753114777] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:07:38,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716404409] [2023-08-27 15:07:38,243 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 15:07:38,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:07:38,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:07:38,244 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 15:07:38,246 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 15:07:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:38,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 15:07:38,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:07:38,391 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-27 15:07:38,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:07:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-27 15:07:38,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716404409] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:07:38,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:07:38,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 10] total 17 [2023-08-27 15:07:38,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710108168] [2023-08-27 15:07:38,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:07:38,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 15:07:38,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:07:38,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 15:07:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2023-08-27 15:07:38,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 253 [2023-08-27 15:07:38,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 52 transitions, 526 flow. Second operand has 18 states, 18 states have (on average 103.66666666666667) internal successors, (1866), 18 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:38,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:07:38,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 253 [2023-08-27 15:07:38,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:07:38,785 INFO L124 PetriNetUnfolderBase]: 1221/2268 cut-off events. [2023-08-27 15:07:38,785 INFO L125 PetriNetUnfolderBase]: For 8915/8915 co-relation queries the response was YES. [2023-08-27 15:07:38,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10338 conditions, 2268 events. 1221/2268 cut-off events. For 8915/8915 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13667 event pairs, 358 based on Foata normal form. 18/2286 useless extension candidates. Maximal degree in co-relation 10308. Up to 1265 conditions per place. [2023-08-27 15:07:38,794 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 79 selfloop transitions, 69 changer transitions 0/148 dead transitions. [2023-08-27 15:07:38,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 148 transitions, 1828 flow [2023-08-27 15:07:38,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 15:07:38,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 15:07:38,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 771 transitions. [2023-08-27 15:07:38,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435347261434218 [2023-08-27 15:07:38,795 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 771 transitions. [2023-08-27 15:07:38,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 771 transitions. [2023-08-27 15:07:38,796 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:07:38,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 771 transitions. [2023-08-27 15:07:38,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 110.14285714285714) internal successors, (771), 7 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:38,797 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 253.0) internal successors, (2024), 8 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:38,797 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 253.0) internal successors, (2024), 8 states have internal predecessors, (2024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:38,797 INFO L175 Difference]: Start difference. First operand has 90 places, 52 transitions, 526 flow. Second operand 7 states and 771 transitions. [2023-08-27 15:07:38,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 148 transitions, 1828 flow [2023-08-27 15:07:38,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 148 transitions, 1652 flow, removed 30 selfloop flow, removed 12 redundant places. [2023-08-27 15:07:38,806 INFO L231 Difference]: Finished difference. Result has 85 places, 110 transitions, 1338 flow [2023-08-27 15:07:38,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1338, PETRI_PLACES=85, PETRI_TRANSITIONS=110} [2023-08-27 15:07:38,807 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 60 predicate places. [2023-08-27 15:07:38,807 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 110 transitions, 1338 flow [2023-08-27 15:07:38,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 103.66666666666667) internal successors, (1866), 18 states have internal predecessors, (1866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:38,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:07:38,807 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:07:38,814 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-27 15:07:39,015 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 15:07:39,015 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:07:39,015 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:07:39,015 INFO L85 PathProgramCache]: Analyzing trace with hash 915403922, now seen corresponding path program 20 times [2023-08-27 15:07:39,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:07:39,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622314538] [2023-08-27 15:07:39,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:07:39,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:07:39,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:39,581 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:07:39,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:07:39,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622314538] [2023-08-27 15:07:39,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622314538] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:07:39,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287348520] [2023-08-27 15:07:39,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:07:39,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:07:39,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:07:39,585 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 15:07:39,587 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 15:07:39,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:07:39,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:07:39,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 15:07:39,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:07:40,223 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 15:07:40,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:07:40,347 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:07:40,348 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-27 15:07:40,829 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 15:07:40,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287348520] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:07:40,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:07:40,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 49 [2023-08-27 15:07:40,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154904464] [2023-08-27 15:07:40,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:07:40,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-08-27 15:07:40,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:07:40,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-08-27 15:07:40,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2148, Unknown=0, NotChecked=0, Total=2550 [2023-08-27 15:07:40,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 15:07:40,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 110 transitions, 1338 flow. Second operand has 51 states, 51 states have (on average 77.3529411764706) internal successors, (3945), 51 states have internal predecessors, (3945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:40,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:07:40,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 15:07:40,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:07:46,430 INFO L124 PetriNetUnfolderBase]: 3978/7471 cut-off events. [2023-08-27 15:07:46,430 INFO L125 PetriNetUnfolderBase]: For 26734/26734 co-relation queries the response was YES. [2023-08-27 15:07:46,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34928 conditions, 7471 events. 3978/7471 cut-off events. For 26734/26734 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 56320 event pairs, 161 based on Foata normal form. 191/7662 useless extension candidates. Maximal degree in co-relation 34897. Up to 4070 conditions per place. [2023-08-27 15:07:46,467 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 509 selfloop transitions, 297 changer transitions 140/946 dead transitions. [2023-08-27 15:07:46,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 946 transitions, 9465 flow [2023-08-27 15:07:46,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-08-27 15:07:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2023-08-27 15:07:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 8573 transitions. [2023-08-27 15:07:46,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3322095636673642 [2023-08-27 15:07:46,473 INFO L72 ComplementDD]: Start complementDD. Operand 102 states and 8573 transitions. [2023-08-27 15:07:46,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 102 states and 8573 transitions. [2023-08-27 15:07:46,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:07:46,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 102 states and 8573 transitions. [2023-08-27 15:07:46,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 103 states, 102 states have (on average 84.04901960784314) internal successors, (8573), 102 states have internal predecessors, (8573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:46,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 103 states, 103 states have (on average 253.0) internal successors, (26059), 103 states have internal predecessors, (26059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:46,497 INFO L81 ComplementDD]: Finished complementDD. Result has 103 states, 103 states have (on average 253.0) internal successors, (26059), 103 states have internal predecessors, (26059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:46,498 INFO L175 Difference]: Start difference. First operand has 85 places, 110 transitions, 1338 flow. Second operand 102 states and 8573 transitions. [2023-08-27 15:07:46,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 946 transitions, 9465 flow [2023-08-27 15:07:46,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 946 transitions, 9417 flow, removed 24 selfloop flow, removed 0 redundant places. [2023-08-27 15:07:46,611 INFO L231 Difference]: Finished difference. Result has 227 places, 341 transitions, 5271 flow [2023-08-27 15:07:46,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=102, PETRI_FLOW=5271, PETRI_PLACES=227, PETRI_TRANSITIONS=341} [2023-08-27 15:07:46,612 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 202 predicate places. [2023-08-27 15:07:46,612 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 341 transitions, 5271 flow [2023-08-27 15:07:46,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 77.3529411764706) internal successors, (3945), 51 states have internal predecessors, (3945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:46,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:07:46,612 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:07:46,635 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 15:07:46,813 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 15:07:46,813 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:07:46,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:07:46,813 INFO L85 PathProgramCache]: Analyzing trace with hash 240082542, now seen corresponding path program 21 times [2023-08-27 15:07:46,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:07:46,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094226036] [2023-08-27 15:07:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:07:46,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:07:46,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:07:47,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:07:47,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094226036] [2023-08-27 15:07:47,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094226036] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:07:47,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754879497] [2023-08-27 15:07:47,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:07:47,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:07:47,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:07:47,454 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 15:07:47,456 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 15:07:47,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-27 15:07:47,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:07:47,934 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 15:07:47,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:07:48,359 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:07:48,363 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 23 treesize of output 10 [2023-08-27 15:07:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 14 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:07:48,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:07:48,700 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:07:48,700 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 24 treesize of output 11 [2023-08-27 15:07:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:07:49,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754879497] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:07:49,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:07:49,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 43 [2023-08-27 15:07:49,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607588674] [2023-08-27 15:07:49,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:07:49,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-27 15:07:49,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:07:49,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-27 15:07:49,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2023-08-27 15:07:49,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 15:07:49,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 341 transitions, 5271 flow. Second operand has 45 states, 45 states have (on average 77.57777777777778) internal successors, (3491), 45 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:49,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:07:49,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 15:07:49,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:07:59,063 INFO L124 PetriNetUnfolderBase]: 4358/8347 cut-off events. [2023-08-27 15:07:59,064 INFO L125 PetriNetUnfolderBase]: For 113596/113596 co-relation queries the response was YES. [2023-08-27 15:07:59,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43183 conditions, 8347 events. 4358/8347 cut-off events. For 113596/113596 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 64944 event pairs, 1368 based on Foata normal form. 89/8436 useless extension candidates. Maximal degree in co-relation 43110. Up to 5662 conditions per place. [2023-08-27 15:07:59,117 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 369 selfloop transitions, 47 changer transitions 222/638 dead transitions. [2023-08-27 15:07:59,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 638 transitions, 8835 flow [2023-08-27 15:07:59,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-27 15:07:59,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-27 15:07:59,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4367 transitions. [2023-08-27 15:07:59,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32567678424938473 [2023-08-27 15:07:59,121 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4367 transitions. [2023-08-27 15:07:59,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4367 transitions. [2023-08-27 15:07:59,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:07:59,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4367 transitions. [2023-08-27 15:07:59,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 82.39622641509433) internal successors, (4367), 53 states have internal predecessors, (4367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:59,130 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 253.0) internal successors, (13662), 54 states have internal predecessors, (13662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:59,130 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 253.0) internal successors, (13662), 54 states have internal predecessors, (13662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:59,130 INFO L175 Difference]: Start difference. First operand has 227 places, 341 transitions, 5271 flow. Second operand 53 states and 4367 transitions. [2023-08-27 15:07:59,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 638 transitions, 8835 flow [2023-08-27 15:07:59,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 638 transitions, 7649 flow, removed 504 selfloop flow, removed 13 redundant places. [2023-08-27 15:07:59,999 INFO L231 Difference]: Finished difference. Result has 279 places, 316 transitions, 3998 flow [2023-08-27 15:07:59,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=4171, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=3998, PETRI_PLACES=279, PETRI_TRANSITIONS=316} [2023-08-27 15:08:00,000 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 254 predicate places. [2023-08-27 15:08:00,000 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 316 transitions, 3998 flow [2023-08-27 15:08:00,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 77.57777777777778) internal successors, (3491), 45 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:00,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:08:00,000 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:08:00,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-27 15:08:00,206 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 15:08:00,206 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:08:00,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:08:00,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1603559928, now seen corresponding path program 22 times [2023-08-27 15:08:00,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:08:00,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574775280] [2023-08-27 15:08:00,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:08:00,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:08:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:08:00,767 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:08:00,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:08:00,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574775280] [2023-08-27 15:08:00,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574775280] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:08:00,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556290700] [2023-08-27 15:08:00,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:08:00,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:08:00,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:08:00,781 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 15:08:00,837 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 15:08:00,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:08:00,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:08:00,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 15:08:00,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:08:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 15:08:01,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:08:01,260 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:08:01,260 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-27 15:08:01,280 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-27 15:08:01,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556290700] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:08:01,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:08:01,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 10] total 30 [2023-08-27 15:08:01,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925284953] [2023-08-27 15:08:01,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:08:01,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 15:08:01,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:08:01,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 15:08:01,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2023-08-27 15:08:01,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 15:08:01,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 316 transitions, 3998 flow. Second operand has 32 states, 32 states have (on average 77.625) internal successors, (2484), 32 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:01,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:08:01,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 15:08:01,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:08:04,976 INFO L124 PetriNetUnfolderBase]: 4149/7657 cut-off events. [2023-08-27 15:08:04,976 INFO L125 PetriNetUnfolderBase]: For 79855/79855 co-relation queries the response was YES. [2023-08-27 15:08:05,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35641 conditions, 7657 events. 4149/7657 cut-off events. For 79855/79855 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 57847 event pairs, 184 based on Foata normal form. 66/7723 useless extension candidates. Maximal degree in co-relation 35551. Up to 4214 conditions per place. [2023-08-27 15:08:05,028 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 145 selfloop transitions, 362 changer transitions 225/732 dead transitions. [2023-08-27 15:08:05,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 732 transitions, 8168 flow [2023-08-27 15:08:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-27 15:08:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-27 15:08:05,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 5309 transitions. [2023-08-27 15:08:05,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32787796442687744 [2023-08-27 15:08:05,035 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 5309 transitions. [2023-08-27 15:08:05,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 5309 transitions. [2023-08-27 15:08:05,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:08:05,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 5309 transitions. [2023-08-27 15:08:05,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 82.953125) internal successors, (5309), 64 states have internal predecessors, (5309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:05,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 253.0) internal successors, (16445), 65 states have internal predecessors, (16445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:05,051 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 253.0) internal successors, (16445), 65 states have internal predecessors, (16445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:05,051 INFO L175 Difference]: Start difference. First operand has 279 places, 316 transitions, 3998 flow. Second operand 64 states and 5309 transitions. [2023-08-27 15:08:05,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 732 transitions, 8168 flow [2023-08-27 15:08:05,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 732 transitions, 7431 flow, removed 143 selfloop flow, removed 39 redundant places. [2023-08-27 15:08:05,255 INFO L231 Difference]: Finished difference. Result has 291 places, 386 transitions, 5367 flow [2023-08-27 15:08:05,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=3185, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=5367, PETRI_PLACES=291, PETRI_TRANSITIONS=386} [2023-08-27 15:08:05,256 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 266 predicate places. [2023-08-27 15:08:05,256 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 386 transitions, 5367 flow [2023-08-27 15:08:05,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 77.625) internal successors, (2484), 32 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:05,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:08:05,256 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:08:05,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-08-27 15:08:05,458 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 15:08:05,458 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:08:05,458 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:08:05,458 INFO L85 PathProgramCache]: Analyzing trace with hash 424113284, now seen corresponding path program 23 times [2023-08-27 15:08:05,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:08:05,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704162502] [2023-08-27 15:08:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:08:05,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:08:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:08:06,255 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 15:08:06,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:08:06,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704162502] [2023-08-27 15:08:06,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704162502] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:08:06,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606330830] [2023-08-27 15:08:06,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:08:06,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:08:06,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:08:06,256 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 15:08:06,310 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 15:08:06,447 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-27 15:08:06,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:08:06,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-27 15:08:06,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:08:06,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:08:06,765 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 15:08:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:08:06,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:08:06,925 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1065 (Array Int Int))) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1065) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16)) 5)) is different from false [2023-08-27 15:08:06,933 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:08:06,933 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 15:08:06,938 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 15:08:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 5 not checked. [2023-08-27 15:08:07,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606330830] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:08:07,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:08:07,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 13] total 41 [2023-08-27 15:08:07,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193235439] [2023-08-27 15:08:07,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:08:07,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-27 15:08:07,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:08:07,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-27 15:08:07,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1615, Unknown=1, NotChecked=80, Total=1806 [2023-08-27 15:08:07,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 15:08:07,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 386 transitions, 5367 flow. Second operand has 43 states, 43 states have (on average 73.44186046511628) internal successors, (3158), 43 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:07,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:08:07,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 15:08:07,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:08:10,350 INFO L124 PetriNetUnfolderBase]: 4672/8385 cut-off events. [2023-08-27 15:08:10,350 INFO L125 PetriNetUnfolderBase]: For 41119/41119 co-relation queries the response was YES. [2023-08-27 15:08:10,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41191 conditions, 8385 events. 4672/8385 cut-off events. For 41119/41119 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 62635 event pairs, 641 based on Foata normal form. 2/8387 useless extension candidates. Maximal degree in co-relation 41102. Up to 4717 conditions per place. [2023-08-27 15:08:10,407 INFO L140 encePairwiseOnDemand]: 242/253 looper letters, 57 selfloop transitions, 410 changer transitions 89/556 dead transitions. [2023-08-27 15:08:10,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 556 transitions, 7928 flow [2023-08-27 15:08:10,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 15:08:10,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 15:08:10,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2477 transitions. [2023-08-27 15:08:10,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.305953557312253 [2023-08-27 15:08:10,410 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2477 transitions. [2023-08-27 15:08:10,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2477 transitions. [2023-08-27 15:08:10,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:08:10,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2477 transitions. [2023-08-27 15:08:10,416 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 77.40625) internal successors, (2477), 32 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:10,419 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 253.0) internal successors, (8349), 33 states have internal predecessors, (8349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:10,419 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 253.0) internal successors, (8349), 33 states have internal predecessors, (8349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:10,420 INFO L175 Difference]: Start difference. First operand has 291 places, 386 transitions, 5367 flow. Second operand 32 states and 2477 transitions. [2023-08-27 15:08:10,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 556 transitions, 7928 flow [2023-08-27 15:08:10,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 556 transitions, 7345 flow, removed 176 selfloop flow, removed 50 redundant places. [2023-08-27 15:08:10,701 INFO L231 Difference]: Finished difference. Result has 248 places, 429 transitions, 6536 flow [2023-08-27 15:08:10,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=4839, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=6536, PETRI_PLACES=248, PETRI_TRANSITIONS=429} [2023-08-27 15:08:10,702 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 223 predicate places. [2023-08-27 15:08:10,702 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 429 transitions, 6536 flow [2023-08-27 15:08:10,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 73.44186046511628) internal successors, (3158), 43 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:10,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:08:10,703 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:08:10,708 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 15:08:10,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-27 15:08:10,907 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:08:10,908 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:08:10,908 INFO L85 PathProgramCache]: Analyzing trace with hash -472781735, now seen corresponding path program 24 times [2023-08-27 15:08:10,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:08:10,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830814748] [2023-08-27 15:08:10,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:08:10,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:08:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:08:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-27 15:08:11,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:08:11,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830814748] [2023-08-27 15:08:11,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830814748] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:08:11,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940615075] [2023-08-27 15:08:11,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:08:11,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:08:11,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:08:11,078 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:08:11,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-27 15:08:11,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-27 15:08:11,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:08:11,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 15:08:11,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:08:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-27 15:08:11,556 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:08:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-27 15:08:11,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940615075] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:08:11,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:08:11,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 12] total 19 [2023-08-27 15:08:11,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343038736] [2023-08-27 15:08:11,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:08:11,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 15:08:11,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:08:11,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 15:08:11,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2023-08-27 15:08:11,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 253 [2023-08-27 15:08:11,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 429 transitions, 6536 flow. Second operand has 20 states, 20 states have (on average 106.5) internal successors, (2130), 20 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:11,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:08:11,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 253 [2023-08-27 15:08:11,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:08:13,862 INFO L124 PetriNetUnfolderBase]: 6961/12784 cut-off events. [2023-08-27 15:08:13,862 INFO L125 PetriNetUnfolderBase]: For 82548/82548 co-relation queries the response was YES. [2023-08-27 15:08:13,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72222 conditions, 12784 events. 6961/12784 cut-off events. For 82548/82548 co-relation queries the response was YES. Maximal size of possible extension queue 781. Compared 105852 event pairs, 1482 based on Foata normal form. 12/12796 useless extension candidates. Maximal degree in co-relation 72164. Up to 7013 conditions per place. [2023-08-27 15:08:13,934 INFO L140 encePairwiseOnDemand]: 250/253 looper letters, 167 selfloop transitions, 494 changer transitions 1/662 dead transitions. [2023-08-27 15:08:13,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 662 transitions, 11681 flow [2023-08-27 15:08:13,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 15:08:13,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 15:08:13,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 907 transitions. [2023-08-27 15:08:13,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481225296442688 [2023-08-27 15:08:13,936 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 907 transitions. [2023-08-27 15:08:13,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 907 transitions. [2023-08-27 15:08:13,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:08:13,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 907 transitions. [2023-08-27 15:08:13,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 113.375) internal successors, (907), 8 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:13,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 253.0) internal successors, (2277), 9 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:13,938 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 253.0) internal successors, (2277), 9 states have internal predecessors, (2277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:13,938 INFO L175 Difference]: Start difference. First operand has 248 places, 429 transitions, 6536 flow. Second operand 8 states and 907 transitions. [2023-08-27 15:08:13,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 662 transitions, 11681 flow [2023-08-27 15:08:14,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 662 transitions, 10863 flow, removed 158 selfloop flow, removed 19 redundant places. [2023-08-27 15:08:14,268 INFO L231 Difference]: Finished difference. Result has 213 places, 616 transitions, 10390 flow [2023-08-27 15:08:14,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=5856, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10390, PETRI_PLACES=213, PETRI_TRANSITIONS=616} [2023-08-27 15:08:14,269 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 188 predicate places. [2023-08-27 15:08:14,269 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 616 transitions, 10390 flow [2023-08-27 15:08:14,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.5) internal successors, (2130), 20 states have internal predecessors, (2130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:14,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:08:14,269 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:08:14,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-27 15:08:14,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:08:14,473 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:08:14,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:08:14,473 INFO L85 PathProgramCache]: Analyzing trace with hash 41446046, now seen corresponding path program 25 times [2023-08-27 15:08:14,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:08:14,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646944426] [2023-08-27 15:08:14,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:08:14,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:08:14,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:08:15,179 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:08:15,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:08:15,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646944426] [2023-08-27 15:08:15,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646944426] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:08:15,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160433295] [2023-08-27 15:08:15,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 15:08:15,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:08:15,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:08:15,180 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:08:15,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-27 15:08:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:08:15,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-27 15:08:15,344 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:08:15,539 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:08:15,585 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 15:08:15,767 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 15:08:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:08:16,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:08:16,656 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:08:16,657 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 50 [2023-08-27 15:08:16,664 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:08:16,664 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 283 [2023-08-27 15:08:16,673 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:08:16,674 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 96 treesize of output 82 [2023-08-27 15:08:16,681 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 15:08:16,681 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 67 [2023-08-27 15:08:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 62 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:08:16,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160433295] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:08:16,948 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:08:16,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 60 [2023-08-27 15:08:16,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139344515] [2023-08-27 15:08:16,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:08:16,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-08-27 15:08:16,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:08:16,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-08-27 15:08:16,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=3248, Unknown=12, NotChecked=0, Total=3782 [2023-08-27 15:08:16,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 253 [2023-08-27 15:08:16,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 616 transitions, 10390 flow. Second operand has 62 states, 62 states have (on average 70.25806451612904) internal successors, (4356), 62 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:16,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:08:16,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 253 [2023-08-27 15:08:16,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:08:30,786 INFO L124 PetriNetUnfolderBase]: 16117/30632 cut-off events. [2023-08-27 15:08:30,786 INFO L125 PetriNetUnfolderBase]: For 202865/202865 co-relation queries the response was YES. [2023-08-27 15:08:31,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 174100 conditions, 30632 events. 16117/30632 cut-off events. For 202865/202865 co-relation queries the response was YES. Maximal size of possible extension queue 1917. Compared 298448 event pairs, 3867 based on Foata normal form. 991/31623 useless extension candidates. Maximal degree in co-relation 174045. Up to 15372 conditions per place. [2023-08-27 15:08:31,173 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 1020 selfloop transitions, 881 changer transitions 484/2385 dead transitions. [2023-08-27 15:08:31,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 2385 transitions, 36610 flow [2023-08-27 15:08:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2023-08-27 15:08:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2023-08-27 15:08:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 10779 transitions. [2023-08-27 15:08:31,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30216129846102097 [2023-08-27 15:08:31,194 INFO L72 ComplementDD]: Start complementDD. Operand 141 states and 10779 transitions. [2023-08-27 15:08:31,194 INFO L73 IsDeterministic]: Start isDeterministic. Operand 141 states and 10779 transitions. [2023-08-27 15:08:31,196 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:08:31,196 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 141 states and 10779 transitions. [2023-08-27 15:08:31,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 142 states, 141 states have (on average 76.44680851063829) internal successors, (10779), 141 states have internal predecessors, (10779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:31,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 142 states, 142 states have (on average 253.0) internal successors, (35926), 142 states have internal predecessors, (35926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:31,239 INFO L81 ComplementDD]: Finished complementDD. Result has 142 states, 142 states have (on average 253.0) internal successors, (35926), 142 states have internal predecessors, (35926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:31,239 INFO L175 Difference]: Start difference. First operand has 213 places, 616 transitions, 10390 flow. Second operand 141 states and 10779 transitions. [2023-08-27 15:08:31,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 2385 transitions, 36610 flow [2023-08-27 15:08:32,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 2385 transitions, 36098 flow, removed 256 selfloop flow, removed 0 redundant places. [2023-08-27 15:08:32,446 INFO L231 Difference]: Finished difference. Result has 446 places, 1509 transitions, 29452 flow [2023-08-27 15:08:32,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=10176, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=141, PETRI_FLOW=29452, PETRI_PLACES=446, PETRI_TRANSITIONS=1509} [2023-08-27 15:08:32,447 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 421 predicate places. [2023-08-27 15:08:32,447 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 1509 transitions, 29452 flow [2023-08-27 15:08:32,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 70.25806451612904) internal successors, (4356), 62 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:32,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:08:32,448 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:08:32,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-27 15:08:32,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:08:32,653 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:08:32,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:08:32,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1543304936, now seen corresponding path program 26 times [2023-08-27 15:08:32,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:08:32,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023848221] [2023-08-27 15:08:32,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:08:32,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:08:32,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:08:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:08:33,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:08:33,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023848221] [2023-08-27 15:08:33,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023848221] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:08:33,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979731530] [2023-08-27 15:08:33,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:08:33,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:08:33,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:08:33,554 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:08:33,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-27 15:08:33,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:08:33,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:08:33,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-27 15:08:33,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:08:34,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:08:34,378 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 15:08:34,673 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:08:34,673 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 23 treesize of output 10 [2023-08-27 15:08:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:08:34,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:08:34,973 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:08:34,973 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 15:08:34,976 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 15:08:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:08:35,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979731530] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:08:35,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:08:35,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 61 [2023-08-27 15:08:35,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842546378] [2023-08-27 15:08:35,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:08:35,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-08-27 15:08:35,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:08:35,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-08-27 15:08:35,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3472, Unknown=3, NotChecked=0, Total=3906 [2023-08-27 15:08:35,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 15:08:35,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 1509 transitions, 29452 flow. Second operand has 63 states, 63 states have (on average 73.33333333333333) internal successors, (4620), 63 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:35,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:08:35,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 15:08:35,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:10:05,083 INFO L124 PetriNetUnfolderBase]: 27163/50875 cut-off events. [2023-08-27 15:10:05,083 INFO L125 PetriNetUnfolderBase]: For 719677/719677 co-relation queries the response was YES. [2023-08-27 15:10:07,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345997 conditions, 50875 events. 27163/50875 cut-off events. For 719677/719677 co-relation queries the response was YES. Maximal size of possible extension queue 1939. Compared 478183 event pairs, 4111 based on Foata normal form. 127/51002 useless extension candidates. Maximal degree in co-relation 345848. Up to 26300 conditions per place. [2023-08-27 15:10:07,269 INFO L140 encePairwiseOnDemand]: 247/253 looper letters, 2237 selfloop transitions, 1874 changer transitions 312/4423 dead transitions. [2023-08-27 15:10:07,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 727 places, 4423 transitions, 80564 flow [2023-08-27 15:10:07,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 289 states. [2023-08-27 15:10:07,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2023-08-27 15:10:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 23304 transitions. [2023-08-27 15:10:07,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31872204822407924 [2023-08-27 15:10:07,292 INFO L72 ComplementDD]: Start complementDD. Operand 289 states and 23304 transitions. [2023-08-27 15:10:07,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 289 states and 23304 transitions. [2023-08-27 15:10:07,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:10:07,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 289 states and 23304 transitions. [2023-08-27 15:10:07,311 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 290 states, 289 states have (on average 80.63667820069205) internal successors, (23304), 289 states have internal predecessors, (23304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:07,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 290 states, 290 states have (on average 253.0) internal successors, (73370), 290 states have internal predecessors, (73370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:07,361 INFO L81 ComplementDD]: Finished complementDD. Result has 290 states, 290 states have (on average 253.0) internal successors, (73370), 290 states have internal predecessors, (73370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:07,361 INFO L175 Difference]: Start difference. First operand has 446 places, 1509 transitions, 29452 flow. Second operand 289 states and 23304 transitions. [2023-08-27 15:10:07,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 727 places, 4423 transitions, 80564 flow [2023-08-27 15:10:20,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 4423 transitions, 78856 flow, removed 842 selfloop flow, removed 13 redundant places. [2023-08-27 15:10:20,525 INFO L231 Difference]: Finished difference. Result has 855 places, 2616 transitions, 60970 flow [2023-08-27 15:10:20,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=27822, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=872, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=289, PETRI_FLOW=60970, PETRI_PLACES=855, PETRI_TRANSITIONS=2616} [2023-08-27 15:10:20,526 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 830 predicate places. [2023-08-27 15:10:20,527 INFO L495 AbstractCegarLoop]: Abstraction has has 855 places, 2616 transitions, 60970 flow [2023-08-27 15:10:20,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 73.33333333333333) internal successors, (4620), 63 states have internal predecessors, (4620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:20,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:10:20,527 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:10:20,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-27 15:10:20,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:20,732 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:10:20,732 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:10:20,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1742392268, now seen corresponding path program 27 times [2023-08-27 15:10:20,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:10:20,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151202253] [2023-08-27 15:10:20,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:10:20,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:10:20,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:10:21,394 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:10:21,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:10:21,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151202253] [2023-08-27 15:10:21,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151202253] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:10:21,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73053269] [2023-08-27 15:10:21,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:10:21,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:21,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:10:21,396 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:10:21,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-27 15:10:21,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-27 15:10:21,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:10:21,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 15:10:21,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:10:22,395 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:10:22,395 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 23 treesize of output 10 [2023-08-27 15:10:22,399 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:10:22,399 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:10:22,586 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:10:22,586 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 24 treesize of output 11 [2023-08-27 15:10:22,963 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:10:22,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73053269] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:10:22,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:10:22,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 50 [2023-08-27 15:10:22,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728805683] [2023-08-27 15:10:22,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:10:22,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-08-27 15:10:22,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:10:22,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-08-27 15:10:22,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=2150, Unknown=0, NotChecked=0, Total=2652 [2023-08-27 15:10:22,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 15:10:22,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 855 places, 2616 transitions, 60970 flow. Second operand has 52 states, 52 states have (on average 77.5) internal successors, (4030), 52 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:22,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:10:22,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 15:10:22,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:10:49,673 INFO L124 PetriNetUnfolderBase]: 9287/17556 cut-off events. [2023-08-27 15:10:49,673 INFO L125 PetriNetUnfolderBase]: For 346008/346008 co-relation queries the response was YES. [2023-08-27 15:10:49,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115573 conditions, 17556 events. 9287/17556 cut-off events. For 346008/346008 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 154466 event pairs, 3038 based on Foata normal form. 278/17834 useless extension candidates. Maximal degree in co-relation 115288. Up to 13353 conditions per place. [2023-08-27 15:10:49,988 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 744 selfloop transitions, 72 changer transitions 302/1118 dead transitions. [2023-08-27 15:10:49,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 1118 transitions, 21532 flow [2023-08-27 15:10:49,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-27 15:10:49,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-27 15:10:49,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4359 transitions. [2023-08-27 15:10:49,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3250801700350511 [2023-08-27 15:10:49,992 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4359 transitions. [2023-08-27 15:10:49,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4359 transitions. [2023-08-27 15:10:49,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:10:49,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4359 transitions. [2023-08-27 15:10:49,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 82.24528301886792) internal successors, (4359), 53 states have internal predecessors, (4359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:50,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 253.0) internal successors, (13662), 54 states have internal predecessors, (13662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:50,000 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 253.0) internal successors, (13662), 54 states have internal predecessors, (13662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:50,000 INFO L175 Difference]: Start difference. First operand has 855 places, 2616 transitions, 60970 flow. Second operand 53 states and 4359 transitions. [2023-08-27 15:10:50,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 1118 transitions, 21532 flow [2023-08-27 15:10:54,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1118 transitions, 19336 flow, removed 1018 selfloop flow, removed 183 redundant places. [2023-08-27 15:10:54,483 INFO L231 Difference]: Finished difference. Result has 440 places, 744 transitions, 13221 flow [2023-08-27 15:10:54,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=15629, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=878, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=806, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=13221, PETRI_PLACES=440, PETRI_TRANSITIONS=744} [2023-08-27 15:10:54,484 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 415 predicate places. [2023-08-27 15:10:54,484 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 744 transitions, 13221 flow [2023-08-27 15:10:54,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 77.5) internal successors, (4030), 52 states have internal predecessors, (4030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:54,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:10:54,484 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:10:54,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-27 15:10:54,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-27 15:10:54,689 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:10:54,689 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:10:54,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1325641864, now seen corresponding path program 28 times [2023-08-27 15:10:54,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:10:54,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378090051] [2023-08-27 15:10:54,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:10:54,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:10:54,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:10:55,360 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:10:55,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:10:55,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378090051] [2023-08-27 15:10:55,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378090051] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:10:55,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122540215] [2023-08-27 15:10:55,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:10:55,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:55,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:10:55,362 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:10:55,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-27 15:10:55,536 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:10:55,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:10:55,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 15:10:55,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:10:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 15:10:55,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:10:55,822 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:10:55,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-27 15:10:55,840 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-08-27 15:10:55,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122540215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:10:55,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:10:55,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 12] total 34 [2023-08-27 15:10:55,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555374947] [2023-08-27 15:10:55,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:10:55,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-27 15:10:55,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:10:55,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-27 15:10:55,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2023-08-27 15:10:55,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 15:10:55,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 744 transitions, 13221 flow. Second operand has 36 states, 36 states have (on average 77.55555555555556) internal successors, (2792), 36 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:55,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:10:55,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 15:10:55,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:11:05,482 INFO L124 PetriNetUnfolderBase]: 10428/19339 cut-off events. [2023-08-27 15:11:05,482 INFO L125 PetriNetUnfolderBase]: For 199758/199758 co-relation queries the response was YES. [2023-08-27 15:11:05,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123027 conditions, 19339 events. 10428/19339 cut-off events. For 199758/199758 co-relation queries the response was YES. Maximal size of possible extension queue 1109. Compared 169586 event pairs, 610 based on Foata normal form. 15/19354 useless extension candidates. Maximal degree in co-relation 122905. Up to 10136 conditions per place. [2023-08-27 15:11:05,908 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 199 selfloop transitions, 837 changer transitions 489/1525 dead transitions. [2023-08-27 15:11:05,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 1525 transitions, 23721 flow [2023-08-27 15:11:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-08-27 15:11:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2023-08-27 15:11:05,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 8735 transitions. [2023-08-27 15:11:05,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3288161114248071 [2023-08-27 15:11:05,929 INFO L72 ComplementDD]: Start complementDD. Operand 105 states and 8735 transitions. [2023-08-27 15:11:05,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 105 states and 8735 transitions. [2023-08-27 15:11:05,939 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:11:05,939 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 105 states and 8735 transitions. [2023-08-27 15:11:05,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 106 states, 105 states have (on average 83.19047619047619) internal successors, (8735), 105 states have internal predecessors, (8735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:11:05,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 106 states, 106 states have (on average 253.0) internal successors, (26818), 106 states have internal predecessors, (26818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:11:05,963 INFO L81 ComplementDD]: Finished complementDD. Result has 106 states, 106 states have (on average 253.0) internal successors, (26818), 106 states have internal predecessors, (26818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:11:05,963 INFO L175 Difference]: Start difference. First operand has 440 places, 744 transitions, 13221 flow. Second operand 105 states and 8735 transitions. [2023-08-27 15:11:05,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 1525 transitions, 23721 flow [2023-08-27 15:11:09,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 1525 transitions, 22890 flow, removed 324 selfloop flow, removed 69 redundant places. [2023-08-27 15:11:09,145 INFO L231 Difference]: Finished difference. Result has 424 places, 874 transitions, 17970 flow [2023-08-27 15:11:09,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=12683, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=664, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=105, PETRI_FLOW=17970, PETRI_PLACES=424, PETRI_TRANSITIONS=874} [2023-08-27 15:11:09,145 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 399 predicate places. [2023-08-27 15:11:09,145 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 874 transitions, 17970 flow [2023-08-27 15:11:09,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 77.55555555555556) internal successors, (2792), 36 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:11:09,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:11:09,146 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:11:09,151 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-27 15:11:09,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-27 15:11:09,351 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:11:09,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:11:09,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1151755279, now seen corresponding path program 29 times [2023-08-27 15:11:09,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:11:09,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446673715] [2023-08-27 15:11:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:11:09,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:11:09,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:11:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:11:10,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:11:10,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446673715] [2023-08-27 15:11:10,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446673715] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:11:10,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166012001] [2023-08-27 15:11:10,403 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:11:10,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:11:10,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:11:10,404 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:11:10,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-27 15:11:10,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-08-27 15:11:10,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:11:10,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-27 15:11:10,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:11:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:11:11,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:11:11,207 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:11:11,207 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-27 15:11:11,228 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-08-27 15:11:11,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166012001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:11:11,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:11:11,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 13] total 39 [2023-08-27 15:11:11,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181668865] [2023-08-27 15:11:11,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:11:11,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-27 15:11:11,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:11:11,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-27 15:11:11,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1527, Unknown=0, NotChecked=0, Total=1640 [2023-08-27 15:11:11,231 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 253 [2023-08-27 15:11:11,232 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 874 transitions, 17970 flow. Second operand has 41 states, 41 states have (on average 77.46341463414635) internal successors, (3176), 41 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:11:11,232 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:11:11,232 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 253 [2023-08-27 15:11:11,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:11:25,544 INFO L124 PetriNetUnfolderBase]: 16863/30978 cut-off events. [2023-08-27 15:11:25,544 INFO L125 PetriNetUnfolderBase]: For 332905/332905 co-relation queries the response was YES. [2023-08-27 15:11:26,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206774 conditions, 30978 events. 16863/30978 cut-off events. For 332905/332905 co-relation queries the response was YES. Maximal size of possible extension queue 1881. Compared 290764 event pairs, 788 based on Foata normal form. 1/30979 useless extension candidates. Maximal degree in co-relation 206683. Up to 16276 conditions per place. [2023-08-27 15:11:26,216 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 417 selfloop transitions, 1438 changer transitions 407/2262 dead transitions. [2023-08-27 15:11:26,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 2262 transitions, 41081 flow [2023-08-27 15:11:26,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2023-08-27 15:11:26,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2023-08-27 15:11:26,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 11013 transitions. [2023-08-27 15:11:26,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3297700323392023 [2023-08-27 15:11:26,223 INFO L72 ComplementDD]: Start complementDD. Operand 132 states and 11013 transitions. [2023-08-27 15:11:26,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 132 states and 11013 transitions. [2023-08-27 15:11:26,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:11:26,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 132 states and 11013 transitions. [2023-08-27 15:11:26,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 133 states, 132 states have (on average 83.43181818181819) internal successors, (11013), 132 states have internal predecessors, (11013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:11:26,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 133 states, 133 states have (on average 253.0) internal successors, (33649), 133 states have internal predecessors, (33649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:11:26,252 INFO L81 ComplementDD]: Finished complementDD. Result has 133 states, 133 states have (on average 253.0) internal successors, (33649), 133 states have internal predecessors, (33649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:11:26,252 INFO L175 Difference]: Start difference. First operand has 424 places, 874 transitions, 17970 flow. Second operand 132 states and 11013 transitions. [2023-08-27 15:11:26,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 2262 transitions, 41081 flow [2023-08-27 15:11:32,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 2262 transitions, 36611 flow, removed 898 selfloop flow, removed 41 redundant places. [2023-08-27 15:11:32,122 INFO L231 Difference]: Finished difference. Result has 426 places, 1472 transitions, 29938 flow [2023-08-27 15:11:32,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=15498, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=874, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=845, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=132, PETRI_FLOW=29938, PETRI_PLACES=426, PETRI_TRANSITIONS=1472} [2023-08-27 15:11:32,136 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 401 predicate places. [2023-08-27 15:11:32,137 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 1472 transitions, 29938 flow [2023-08-27 15:11:32,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 77.46341463414635) internal successors, (3176), 41 states have internal predecessors, (3176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:11:32,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:11:32,137 INFO L208 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:11:32,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-27 15:11:32,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:11:32,343 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:11:32,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:11:32,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1421754661, now seen corresponding path program 30 times [2023-08-27 15:11:32,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:11:32,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981401205] [2023-08-27 15:11:32,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:11:32,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:11:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:11:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 6 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:11:33,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:11:33,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981401205] [2023-08-27 15:11:33,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981401205] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:11:33,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908731854] [2023-08-27 15:11:33,283 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:11:33,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:11:33,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:11:33,284 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:11:33,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-27 15:11:33,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-08-27 15:11:33,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:11:33,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-27 15:11:33,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:11:34,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:11:34,184 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 15:11:34,575 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 15:11:34,575 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 23 treesize of output 10 [2023-08-27 15:11:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:11:34,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:11:34,989 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:11:34,990 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 15:11:34,994 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 15:11:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:11:36,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908731854] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:11:36,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:11:36,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 64 [2023-08-27 15:11:36,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108699270] [2023-08-27 15:11:36,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:11:36,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-08-27 15:11:36,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:11:36,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-08-27 15:11:36,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=717, Invalid=3573, Unknown=0, NotChecked=0, Total=4290 [2023-08-27 15:11:36,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 253 [2023-08-27 15:11:36,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1472 transitions, 29938 flow. Second operand has 66 states, 66 states have (on average 73.31818181818181) internal successors, (4839), 66 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:11:36,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:11:36,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 253 [2023-08-27 15:11:36,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:11:40,637 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:15:22,765 INFO L124 PetriNetUnfolderBase]: 90467/165667 cut-off events. [2023-08-27 15:15:22,765 INFO L125 PetriNetUnfolderBase]: For 1878378/1878378 co-relation queries the response was YES. [2023-08-27 15:15:24,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1073110 conditions, 165667 events. 90467/165667 cut-off events. For 1878378/1878378 co-relation queries the response was YES. Maximal size of possible extension queue 6840. Compared 1844541 event pairs, 6860 based on Foata normal form. 1127/166794 useless extension candidates. Maximal degree in co-relation 1073040. Up to 89809 conditions per place. [2023-08-27 15:15:25,171 INFO L140 encePairwiseOnDemand]: 246/253 looper letters, 5018 selfloop transitions, 4377 changer transitions 3777/13172 dead transitions. [2023-08-27 15:15:25,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1309 places, 13172 transitions, 237488 flow [2023-08-27 15:15:25,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 884 states. [2023-08-27 15:15:25,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 884 states. [2023-08-27 15:15:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 71334 transitions. [2023-08-27 15:15:25,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31895087010176526 [2023-08-27 15:15:25,209 INFO L72 ComplementDD]: Start complementDD. Operand 884 states and 71334 transitions. [2023-08-27 15:15:25,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 884 states and 71334 transitions. [2023-08-27 15:15:25,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:15:25,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 884 states and 71334 transitions. [2023-08-27 15:15:25,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 885 states, 884 states have (on average 80.6945701357466) internal successors, (71334), 884 states have internal predecessors, (71334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:15:25,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 885 states, 885 states have (on average 253.0) internal successors, (223905), 885 states have internal predecessors, (223905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:15:25,420 INFO L81 ComplementDD]: Finished complementDD. Result has 885 states, 885 states have (on average 253.0) internal successors, (223905), 885 states have internal predecessors, (223905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:15:25,420 INFO L175 Difference]: Start difference. First operand has 426 places, 1472 transitions, 29938 flow. Second operand 884 states and 71334 transitions. [2023-08-27 15:15:25,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1309 places, 13172 transitions, 237488 flow [2023-08-27 15:15:55,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1246 places, 13172 transitions, 222159 flow, removed 3542 selfloop flow, removed 63 redundant places. [2023-08-27 15:15:55,428 INFO L231 Difference]: Finished difference. Result has 1704 places, 5375 transitions, 121768 flow [2023-08-27 15:15:55,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=253, PETRI_DIFFERENCE_MINUEND_FLOW=21509, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=543, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=884, PETRI_FLOW=121768, PETRI_PLACES=1704, PETRI_TRANSITIONS=5375} [2023-08-27 15:15:55,429 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 1679 predicate places. [2023-08-27 15:15:55,429 INFO L495 AbstractCegarLoop]: Abstraction has has 1704 places, 5375 transitions, 121768 flow [2023-08-27 15:15:55,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 73.31818181818181) internal successors, (4839), 66 states have internal predecessors, (4839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:15:55,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:15:55,430 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:15:55,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-27 15:15:55,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-27 15:15:55,636 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 10 more)] === [2023-08-27 15:15:55,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:15:55,636 INFO L85 PathProgramCache]: Analyzing trace with hash 550700856, now seen corresponding path program 31 times [2023-08-27 15:15:55,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:15:55,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801934140] [2023-08-27 15:15:55,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:15:55,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:15:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:15:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-08-27 15:15:55,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:15:55,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801934140] [2023-08-27 15:15:55,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801934140] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:15:55,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426464312] [2023-08-27 15:15:55,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 15:15:55,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:15:55,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:15:55,794 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:15:55,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-27 15:15:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:15:55,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 15:15:55,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:15:56,005 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-08-27 15:15:56,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:15:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-08-27 15:15:56,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426464312] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:15:56,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:15:56,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 14] total 23 [2023-08-27 15:15:56,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343924017] [2023-08-27 15:15:56,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:15:56,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 15:15:56,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:15:56,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 15:15:56,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=356, Unknown=0, NotChecked=0, Total=552 [2023-08-27 15:15:56,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 253 [2023-08-27 15:15:56,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1704 places, 5375 transitions, 121768 flow. Second operand has 24 states, 24 states have (on average 103.33333333333333) internal successors, (2480), 24 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:15:56,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:15:56,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 253 [2023-08-27 15:15:56,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-27 15:18:56,795 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 15:18:56,795 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 15:18:57,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-27 15:18:57,921 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