/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 07:52:09,231 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 07:52:09,291 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 07:52:09,294 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 07:52:09,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 07:52:09,323 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 07:52:09,324 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 07:52:09,324 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 07:52:09,325 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 07:52:09,328 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 07:52:09,328 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 07:52:09,328 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 07:52:09,328 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 07:52:09,329 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 07:52:09,330 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 07:52:09,330 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 07:52:09,330 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 07:52:09,330 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 07:52:09,330 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 07:52:09,330 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 07:52:09,330 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 07:52:09,331 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 07:52:09,331 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 07:52:09,331 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 07:52:09,331 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 07:52:09,332 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 07:52:09,332 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 07:52:09,332 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:52:09,332 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 07:52:09,332 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 07:52:09,333 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 07:52:09,333 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 07:52:09,333 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 07:52:09,333 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 07:52:09,333 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 07:52:09,334 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 07:52:09,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 07:52:09,564 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 07:52:09,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 07:52:09,566 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 07:52:09,568 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 07:52:09,568 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-08-27 07:52:10,662 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 07:52:10,855 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 07:52:10,855 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-max-array.wvr.c [2023-08-27 07:52:10,860 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/006b1509b/9945d292dc384660bb9d777c4972fa75/FLAGa643c93fe [2023-08-27 07:52:10,868 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/006b1509b/9945d292dc384660bb9d777c4972fa75 [2023-08-27 07:52:10,869 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 07:52:10,870 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 07:52:10,871 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 07:52:10,871 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 07:52:10,872 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 07:52:10,873 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:52:10" (1/1) ... [2023-08-27 07:52:10,873 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cccb592 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:52:10, skipping insertion in model container [2023-08-27 07:52:10,874 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:52:10" (1/1) ... [2023-08-27 07:52:10,886 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 07:52:10,981 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:52:10,987 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 07:52:11,000 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 07:52:11,005 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:52:11,005 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 07:52:11,009 INFO L206 MainTranslator]: Completed translation [2023-08-27 07:52:11,009 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:52:11 WrapperNode [2023-08-27 07:52:11,009 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 07:52:11,010 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 07:52:11,010 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 07:52:11,010 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 07:52:11,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:52:11" (1/1) ... [2023-08-27 07:52:11,018 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:52:11" (1/1) ... [2023-08-27 07:52:11,030 INFO L138 Inliner]: procedures = 24, calls = 44, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 109 [2023-08-27 07:52:11,031 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 07:52:11,031 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 07:52:11,031 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 07:52:11,031 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 07:52:11,036 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:52:11" (1/1) ... [2023-08-27 07:52:11,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:52:11" (1/1) ... [2023-08-27 07:52:11,038 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:52:11" (1/1) ... [2023-08-27 07:52:11,039 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:52:11" (1/1) ... [2023-08-27 07:52:11,042 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:52:11" (1/1) ... [2023-08-27 07:52:11,044 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:52:11" (1/1) ... [2023-08-27 07:52:11,045 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:52:11" (1/1) ... [2023-08-27 07:52:11,046 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:52:11" (1/1) ... [2023-08-27 07:52:11,047 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 07:52:11,048 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 07:52:11,048 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 07:52:11,048 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 07:52:11,048 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:52:11" (1/1) ... [2023-08-27 07:52:11,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 07:52:11,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:52:11,078 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-27 07:52:11,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-27 07:52:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 07:52:11,100 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 07:52:11,100 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 07:52:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 07:52:11,101 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 07:52:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 07:52:11,101 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 07:52:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 07:52:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 07:52:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 07:52:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 07:52:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 07:52:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 07:52:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 07:52:11,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 07:52:11,101 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 07:52:11,102 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 07:52:11,102 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 07:52:11,167 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 07:52:11,173 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 07:52:11,399 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 07:52:11,437 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 07:52:11,437 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-27 07:52:11,439 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:52:11 BoogieIcfgContainer [2023-08-27 07:52:11,439 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 07:52:11,440 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 07:52:11,441 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 07:52:11,443 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 07:52:11,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 07:52:10" (1/3) ... [2023-08-27 07:52:11,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78959d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:52:11, skipping insertion in model container [2023-08-27 07:52:11,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:52:11" (2/3) ... [2023-08-27 07:52:11,444 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78959d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:52:11, skipping insertion in model container [2023-08-27 07:52:11,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:52:11" (3/3) ... [2023-08-27 07:52:11,445 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array.wvr.c [2023-08-27 07:52:11,456 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 07:52:11,457 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 9 error locations. [2023-08-27 07:52:11,457 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 07:52:11,503 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 07:52:11,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 165 transitions, 354 flow [2023-08-27 07:52:11,627 INFO L124 PetriNetUnfolderBase]: 12/162 cut-off events. [2023-08-27 07:52:11,628 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 07:52:11,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 162 events. 12/162 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 156 event pairs, 0 based on Foata normal form. 0/141 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-08-27 07:52:11,633 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 165 transitions, 354 flow [2023-08-27 07:52:11,636 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 151 transitions, 320 flow [2023-08-27 07:52:11,638 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 07:52:11,644 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 151 transitions, 320 flow [2023-08-27 07:52:11,646 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 151 transitions, 320 flow [2023-08-27 07:52:11,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 151 transitions, 320 flow [2023-08-27 07:52:11,666 INFO L124 PetriNetUnfolderBase]: 12/151 cut-off events. [2023-08-27 07:52:11,666 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 07:52:11,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 12/151 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 155 event pairs, 0 based on Foata normal form. 0/131 useless extension candidates. Maximal degree in co-relation 120. Up to 2 conditions per place. [2023-08-27 07:52:11,668 INFO L119 LiptonReduction]: Number of co-enabled transitions 2430 [2023-08-27 07:52:15,942 INFO L134 LiptonReduction]: Checked pairs total: 2901 [2023-08-27 07:52:15,942 INFO L136 LiptonReduction]: Total number of compositions: 154 [2023-08-27 07:52:15,952 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 07:52:15,956 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;@127a291f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 07:52:15,956 INFO L358 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2023-08-27 07:52:15,958 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 07:52:15,958 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 07:52:15,958 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 07:52:15,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:15,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 07:52:15,958 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:15,961 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:15,961 INFO L85 PathProgramCache]: Analyzing trace with hash 21448, now seen corresponding path program 1 times [2023-08-27 07:52:15,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:15,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430621185] [2023-08-27 07:52:15,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:15,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:16,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:52:16,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:16,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430621185] [2023-08-27 07:52:16,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430621185] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:52:16,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:52:16,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 07:52:16,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614304879] [2023-08-27 07:52:16,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:52:16,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:52:16,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:16,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:52:16,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:52:16,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 319 [2023-08-27 07:52:16,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 82 flow. Second operand has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:16,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:16,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 319 [2023-08-27 07:52:16,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:16,354 INFO L124 PetriNetUnfolderBase]: 1266/1643 cut-off events. [2023-08-27 07:52:16,355 INFO L125 PetriNetUnfolderBase]: For 47/47 co-relation queries the response was YES. [2023-08-27 07:52:16,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3358 conditions, 1643 events. 1266/1643 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 6217 event pairs, 586 based on Foata normal form. 0/573 useless extension candidates. Maximal degree in co-relation 2828. Up to 1617 conditions per place. [2023-08-27 07:52:16,368 INFO L140 encePairwiseOnDemand]: 314/319 looper letters, 28 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2023-08-27 07:52:16,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 148 flow [2023-08-27 07:52:16,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:52:16,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:52:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 450 transitions. [2023-08-27 07:52:16,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4702194357366771 [2023-08-27 07:52:16,385 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 450 transitions. [2023-08-27 07:52:16,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 450 transitions. [2023-08-27 07:52:16,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:16,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 450 transitions. [2023-08-27 07:52:16,394 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:16,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:16,399 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:16,400 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 82 flow. Second operand 3 states and 450 transitions. [2023-08-27 07:52:16,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 148 flow [2023-08-27 07:52:16,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 34 transitions, 136 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 07:52:16,407 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 91 flow [2023-08-27 07:52:16,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2023-08-27 07:52:16,411 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-27 07:52:16,411 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 91 flow [2023-08-27 07:52:16,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:16,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:16,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 07:52:16,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 07:52:16,413 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:16,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:16,413 INFO L85 PathProgramCache]: Analyzing trace with hash 666248, now seen corresponding path program 1 times [2023-08-27 07:52:16,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:16,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212243563] [2023-08-27 07:52:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:16,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:16,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:52:16,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:16,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212243563] [2023-08-27 07:52:16,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212243563] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:52:16,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:52:16,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:52:16,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943152618] [2023-08-27 07:52:16,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:52:16,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:52:16,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:16,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:52:16,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:52:16,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 319 [2023-08-27 07:52:16,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:16,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:16,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 319 [2023-08-27 07:52:16,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:16,605 INFO L124 PetriNetUnfolderBase]: 1266/1642 cut-off events. [2023-08-27 07:52:16,606 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-27 07:52:16,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3301 conditions, 1642 events. 1266/1642 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 6189 event pairs, 586 based on Foata normal form. 0/573 useless extension candidates. Maximal degree in co-relation 3277. Up to 1613 conditions per place. [2023-08-27 07:52:16,614 INFO L140 encePairwiseOnDemand]: 316/319 looper letters, 27 selfloop transitions, 3 changer transitions 0/33 dead transitions. [2023-08-27 07:52:16,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 147 flow [2023-08-27 07:52:16,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:52:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:52:16,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2023-08-27 07:52:16,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660397074190178 [2023-08-27 07:52:16,616 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2023-08-27 07:52:16,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2023-08-27 07:52:16,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:16,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2023-08-27 07:52:16,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:16,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:16,619 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:16,619 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 91 flow. Second operand 3 states and 446 transitions. [2023-08-27 07:52:16,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 147 flow [2023-08-27 07:52:16,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 33 transitions, 142 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 07:52:16,620 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 88 flow [2023-08-27 07:52:16,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-08-27 07:52:16,621 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, -3 predicate places. [2023-08-27 07:52:16,621 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 88 flow [2023-08-27 07:52:16,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.0) internal successors, (420), 3 states have internal predecessors, (420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:16,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:16,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 07:52:16,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 07:52:16,622 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:16,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:16,622 INFO L85 PathProgramCache]: Analyzing trace with hash 666262, now seen corresponding path program 1 times [2023-08-27 07:52:16,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:16,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283847686] [2023-08-27 07:52:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:16,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:52:16,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:16,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283847686] [2023-08-27 07:52:16,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283847686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:52:16,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874689273] [2023-08-27 07:52:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:16,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:16,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:52:16,689 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:52:16,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 07:52:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:16,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:52:16,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:52:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:52:16,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:52:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:52:16,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874689273] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:52:16,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:52:16,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 07:52:16,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655947843] [2023-08-27 07:52:16,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:52:16,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:52:16,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:16,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:52:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 07:52:16,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 319 [2023-08-27 07:52:16,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 140.14285714285714) internal successors, (981), 7 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:16,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:16,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 319 [2023-08-27 07:52:16,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:16,947 INFO L124 PetriNetUnfolderBase]: 1269/1648 cut-off events. [2023-08-27 07:52:16,947 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 07:52:16,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3322 conditions, 1648 events. 1269/1648 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 6220 event pairs, 586 based on Foata normal form. 0/581 useless extension candidates. Maximal degree in co-relation 3277. Up to 1619 conditions per place. [2023-08-27 07:52:16,956 INFO L140 encePairwiseOnDemand]: 315/319 looper letters, 27 selfloop transitions, 9 changer transitions 0/39 dead transitions. [2023-08-27 07:52:16,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 190 flow [2023-08-27 07:52:16,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:52:16,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:52:16,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 873 transitions. [2023-08-27 07:52:16,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4561128526645768 [2023-08-27 07:52:16,958 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 873 transitions. [2023-08-27 07:52:16,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 873 transitions. [2023-08-27 07:52:16,959 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:16,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 873 transitions. [2023-08-27 07:52:16,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 145.5) internal successors, (873), 6 states have internal predecessors, (873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:16,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 319.0) internal successors, (2233), 7 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:16,963 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 319.0) internal successors, (2233), 7 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:16,964 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 88 flow. Second operand 6 states and 873 transitions. [2023-08-27 07:52:16,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 190 flow [2023-08-27 07:52:16,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 39 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:52:16,965 INFO L231 Difference]: Finished difference. Result has 41 places, 39 transitions, 143 flow [2023-08-27 07:52:16,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=143, PETRI_PLACES=41, PETRI_TRANSITIONS=39} [2023-08-27 07:52:16,966 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 3 predicate places. [2023-08-27 07:52:16,966 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 39 transitions, 143 flow [2023-08-27 07:52:16,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 140.14285714285714) internal successors, (981), 7 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:16,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:16,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 07:52:16,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 07:52:17,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:17,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:17,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:17,174 INFO L85 PathProgramCache]: Analyzing trace with hash 639913209, now seen corresponding path program 1 times [2023-08-27 07:52:17,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:17,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453235354] [2023-08-27 07:52:17,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:17,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:17,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:17,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:52:17,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:17,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453235354] [2023-08-27 07:52:17,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453235354] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:52:17,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:52:17,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:52:17,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298391543] [2023-08-27 07:52:17,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:52:17,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:52:17,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:17,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:52:17,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:52:17,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 319 [2023-08-27 07:52:17,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 39 transitions, 143 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:17,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:17,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 319 [2023-08-27 07:52:17,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:17,402 INFO L124 PetriNetUnfolderBase]: 1349/1790 cut-off events. [2023-08-27 07:52:17,402 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 07:52:17,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3628 conditions, 1790 events. 1349/1790 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 7470 event pairs, 213 based on Foata normal form. 0/713 useless extension candidates. Maximal degree in co-relation 3592. Up to 1494 conditions per place. [2023-08-27 07:52:17,410 INFO L140 encePairwiseOnDemand]: 314/319 looper letters, 49 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-27 07:52:17,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 279 flow [2023-08-27 07:52:17,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:52:17,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:52:17,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 469 transitions. [2023-08-27 07:52:17,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49007314524555906 [2023-08-27 07:52:17,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 469 transitions. [2023-08-27 07:52:17,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 469 transitions. [2023-08-27 07:52:17,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:17,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 469 transitions. [2023-08-27 07:52:17,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:17,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:17,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:17,415 INFO L175 Difference]: Start difference. First operand has 41 places, 39 transitions, 143 flow. Second operand 3 states and 469 transitions. [2023-08-27 07:52:17,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 279 flow [2023-08-27 07:52:17,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 54 transitions, 258 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 07:52:17,416 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 143 flow [2023-08-27 07:52:17,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=143, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2023-08-27 07:52:17,417 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 5 predicate places. [2023-08-27 07:52:17,417 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 143 flow [2023-08-27 07:52:17,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:17,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:17,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 07:52:17,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 07:52:17,418 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:17,418 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:17,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1637525854, now seen corresponding path program 1 times [2023-08-27 07:52:17,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:17,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078674556] [2023-08-27 07:52:17,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:17,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:17,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:52:17,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:17,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078674556] [2023-08-27 07:52:17,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078674556] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:52:17,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:52:17,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-27 07:52:17,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935708944] [2023-08-27 07:52:17,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:52:17,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 07:52:17,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:17,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 07:52:17,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 07:52:17,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 319 [2023-08-27 07:52:17,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 143 flow. Second operand has 5 states, 5 states have (on average 124.2) internal successors, (621), 5 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:17,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:17,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 319 [2023-08-27 07:52:17,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:17,615 INFO L124 PetriNetUnfolderBase]: 1362/1803 cut-off events. [2023-08-27 07:52:17,615 INFO L125 PetriNetUnfolderBase]: For 288/288 co-relation queries the response was YES. [2023-08-27 07:52:17,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4162 conditions, 1803 events. 1362/1803 cut-off events. For 288/288 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 7268 event pairs, 704 based on Foata normal form. 1/716 useless extension candidates. Maximal degree in co-relation 4133. Up to 1777 conditions per place. [2023-08-27 07:52:17,622 INFO L140 encePairwiseOnDemand]: 316/319 looper letters, 36 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-27 07:52:17,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 214 flow [2023-08-27 07:52:17,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:52:17,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:52:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 400 transitions. [2023-08-27 07:52:17,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4179728317659352 [2023-08-27 07:52:17,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 400 transitions. [2023-08-27 07:52:17,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 400 transitions. [2023-08-27 07:52:17,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:17,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 400 transitions. [2023-08-27 07:52:17,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:17,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:17,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:17,626 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 143 flow. Second operand 3 states and 400 transitions. [2023-08-27 07:52:17,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 214 flow [2023-08-27 07:52:17,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 209 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 07:52:17,627 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 137 flow [2023-08-27 07:52:17,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=137, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-08-27 07:52:17,628 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 6 predicate places. [2023-08-27 07:52:17,628 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 137 flow [2023-08-27 07:52:17,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 124.2) internal successors, (621), 5 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:17,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:17,629 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 07:52:17,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 07:52:17,629 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:17,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:17,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1625291818, now seen corresponding path program 2 times [2023-08-27 07:52:17,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:17,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079976427] [2023-08-27 07:52:17,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:17,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:17,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:17,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:52:17,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:17,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079976427] [2023-08-27 07:52:17,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079976427] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:52:17,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350763980] [2023-08-27 07:52:17,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:52:17,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:17,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:52:17,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:52:17,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 07:52:17,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:52:17,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:52:17,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 07:52:17,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:52:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 07:52:17,784 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:52:17,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350763980] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:52:17,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:52:17,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 07:52:17,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729952296] [2023-08-27 07:52:17,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:52:17,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:52:17,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:17,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:52:17,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 07:52:17,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 319 [2023-08-27 07:52:17,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:17,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:17,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 319 [2023-08-27 07:52:17,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:17,884 INFO L124 PetriNetUnfolderBase]: 1166/1545 cut-off events. [2023-08-27 07:52:17,884 INFO L125 PetriNetUnfolderBase]: For 124/180 co-relation queries the response was YES. [2023-08-27 07:52:17,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3409 conditions, 1545 events. 1166/1545 cut-off events. For 124/180 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 6074 event pairs, 589 based on Foata normal form. 57/697 useless extension candidates. Maximal degree in co-relation 3392. Up to 1521 conditions per place. [2023-08-27 07:52:17,890 INFO L140 encePairwiseOnDemand]: 317/319 looper letters, 35 selfloop transitions, 1 changer transitions 0/39 dead transitions. [2023-08-27 07:52:17,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 39 transitions, 199 flow [2023-08-27 07:52:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:52:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:52:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 448 transitions. [2023-08-27 07:52:17,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46812957157784746 [2023-08-27 07:52:17,891 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 448 transitions. [2023-08-27 07:52:17,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 448 transitions. [2023-08-27 07:52:17,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:17,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 448 transitions. [2023-08-27 07:52:17,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:17,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:17,894 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:17,894 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 137 flow. Second operand 3 states and 448 transitions. [2023-08-27 07:52:17,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 39 transitions, 199 flow [2023-08-27 07:52:17,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 180 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-27 07:52:17,895 INFO L231 Difference]: Finished difference. Result has 39 places, 39 transitions, 110 flow [2023-08-27 07:52:17,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=39, PETRI_TRANSITIONS=39} [2023-08-27 07:52:17,896 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 1 predicate places. [2023-08-27 07:52:17,896 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 39 transitions, 110 flow [2023-08-27 07:52:17,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.0) internal successors, (423), 3 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:17,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:17,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:52:17,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 07:52:18,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-27 07:52:18,103 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:18,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1143328098, now seen corresponding path program 1 times [2023-08-27 07:52:18,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:18,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120637625] [2023-08-27 07:52:18,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:18,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:18,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:18,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:52:18,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:18,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120637625] [2023-08-27 07:52:18,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120637625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:52:18,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454935351] [2023-08-27 07:52:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:18,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:18,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:52:18,165 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:52:18,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 07:52:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:18,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 07:52:18,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:52:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:52:18,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:52:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:52:18,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454935351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:52:18,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:52:18,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 12 [2023-08-27 07:52:18,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333252982] [2023-08-27 07:52:18,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:52:18,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 07:52:18,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:18,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 07:52:18,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-08-27 07:52:18,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 319 [2023-08-27 07:52:18,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 39 transitions, 110 flow. Second operand has 13 states, 13 states have (on average 124.53846153846153) internal successors, (1619), 13 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:18,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:18,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 319 [2023-08-27 07:52:18,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:18,693 INFO L124 PetriNetUnfolderBase]: 2044/2703 cut-off events. [2023-08-27 07:52:18,693 INFO L125 PetriNetUnfolderBase]: For 167/167 co-relation queries the response was YES. [2023-08-27 07:52:18,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5907 conditions, 2703 events. 2044/2703 cut-off events. For 167/167 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 11557 event pairs, 327 based on Foata normal form. 0/1332 useless extension candidates. Maximal degree in co-relation 5898. Up to 697 conditions per place. [2023-08-27 07:52:18,705 INFO L140 encePairwiseOnDemand]: 310/319 looper letters, 97 selfloop transitions, 12 changer transitions 0/111 dead transitions. [2023-08-27 07:52:18,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 111 transitions, 490 flow [2023-08-27 07:52:18,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 07:52:18,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 07:52:18,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1219 transitions. [2023-08-27 07:52:18,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42459073493556254 [2023-08-27 07:52:18,708 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1219 transitions. [2023-08-27 07:52:18,708 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1219 transitions. [2023-08-27 07:52:18,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:18,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1219 transitions. [2023-08-27 07:52:18,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 135.44444444444446) internal successors, (1219), 9 states have internal predecessors, (1219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:18,715 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 319.0) internal successors, (3190), 10 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:18,717 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 319.0) internal successors, (3190), 10 states have internal predecessors, (3190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:18,717 INFO L175 Difference]: Start difference. First operand has 39 places, 39 transitions, 110 flow. Second operand 9 states and 1219 transitions. [2023-08-27 07:52:18,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 111 transitions, 490 flow [2023-08-27 07:52:18,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 111 transitions, 489 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:52:18,721 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 163 flow [2023-08-27 07:52:18,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=163, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-08-27 07:52:18,721 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2023-08-27 07:52:18,722 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 163 flow [2023-08-27 07:52:18,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 124.53846153846153) internal successors, (1619), 13 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:18,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:18,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:52:18,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 07:52:18,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:18,925 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:18,925 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:18,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1088830730, now seen corresponding path program 1 times [2023-08-27 07:52:18,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:18,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375528800] [2023-08-27 07:52:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:18,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:18,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:52:18,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:18,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375528800] [2023-08-27 07:52:18,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375528800] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:52:18,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:52:18,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:52:18,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856444200] [2023-08-27 07:52:18,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:52:18,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:52:18,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:18,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:52:18,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 07:52:18,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 319 [2023-08-27 07:52:18,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 163 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:18,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:18,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 319 [2023-08-27 07:52:18,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:19,145 INFO L124 PetriNetUnfolderBase]: 1759/2406 cut-off events. [2023-08-27 07:52:19,145 INFO L125 PetriNetUnfolderBase]: For 2705/2865 co-relation queries the response was YES. [2023-08-27 07:52:19,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6335 conditions, 2406 events. 1759/2406 cut-off events. For 2705/2865 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 10662 event pairs, 821 based on Foata normal form. 144/1638 useless extension candidates. Maximal degree in co-relation 6322. Up to 2010 conditions per place. [2023-08-27 07:52:19,155 INFO L140 encePairwiseOnDemand]: 314/319 looper letters, 55 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2023-08-27 07:52:19,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 360 flow [2023-08-27 07:52:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:52:19,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:52:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 466 transitions. [2023-08-27 07:52:19,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48693834900731453 [2023-08-27 07:52:19,161 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 466 transitions. [2023-08-27 07:52:19,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 466 transitions. [2023-08-27 07:52:19,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:19,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 466 transitions. [2023-08-27 07:52:19,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.33333333333334) internal successors, (466), 3 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:19,163 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:19,164 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:19,164 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 163 flow. Second operand 3 states and 466 transitions. [2023-08-27 07:52:19,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 360 flow [2023-08-27 07:52:19,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 341 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-27 07:52:19,168 INFO L231 Difference]: Finished difference. Result has 48 places, 44 transitions, 171 flow [2023-08-27 07:52:19,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=48, PETRI_TRANSITIONS=44} [2023-08-27 07:52:19,170 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 10 predicate places. [2023-08-27 07:52:19,170 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 44 transitions, 171 flow [2023-08-27 07:52:19,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:19,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:19,172 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-27 07:52:19,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 07:52:19,172 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:19,172 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:19,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1450454708, now seen corresponding path program 1 times [2023-08-27 07:52:19,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:19,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252739934] [2023-08-27 07:52:19,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:19,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:19,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:52:19,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:19,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252739934] [2023-08-27 07:52:19,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252739934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:52:19,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370716652] [2023-08-27 07:52:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:19,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:19,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:52:19,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:52:19,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 07:52:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:19,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:52:19,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:52:19,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:52:19,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:52:19,311 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:52:19,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370716652] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:52:19,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:52:19,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 07:52:19,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362573098] [2023-08-27 07:52:19,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:52:19,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:52:19,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:19,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:52:19,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 07:52:19,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 319 [2023-08-27 07:52:19,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 44 transitions, 171 flow. Second operand has 7 states, 7 states have (on average 142.71428571428572) internal successors, (999), 7 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:19,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:19,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 319 [2023-08-27 07:52:19,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:19,586 INFO L124 PetriNetUnfolderBase]: 2569/3417 cut-off events. [2023-08-27 07:52:19,587 INFO L125 PetriNetUnfolderBase]: For 2281/2429 co-relation queries the response was YES. [2023-08-27 07:52:19,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10466 conditions, 3417 events. 2569/3417 cut-off events. For 2281/2429 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 14832 event pairs, 351 based on Foata normal form. 147/2319 useless extension candidates. Maximal degree in co-relation 10452. Up to 1994 conditions per place. [2023-08-27 07:52:19,602 INFO L140 encePairwiseOnDemand]: 315/319 looper letters, 95 selfloop transitions, 13 changer transitions 0/110 dead transitions. [2023-08-27 07:52:19,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 110 transitions, 631 flow [2023-08-27 07:52:19,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 07:52:19,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 07:52:19,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 936 transitions. [2023-08-27 07:52:19,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4890282131661442 [2023-08-27 07:52:19,604 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 936 transitions. [2023-08-27 07:52:19,604 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 936 transitions. [2023-08-27 07:52:19,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:19,605 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 936 transitions. [2023-08-27 07:52:19,606 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 156.0) internal successors, (936), 6 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:19,608 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 319.0) internal successors, (2233), 7 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:19,608 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 319.0) internal successors, (2233), 7 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:19,608 INFO L175 Difference]: Start difference. First operand has 48 places, 44 transitions, 171 flow. Second operand 6 states and 936 transitions. [2023-08-27 07:52:19,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 110 transitions, 631 flow [2023-08-27 07:52:19,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 110 transitions, 610 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-27 07:52:19,614 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 249 flow [2023-08-27 07:52:19,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=249, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2023-08-27 07:52:19,614 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2023-08-27 07:52:19,614 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 249 flow [2023-08-27 07:52:19,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 142.71428571428572) internal successors, (999), 7 states have internal predecessors, (999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:19,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:19,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:52:19,637 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 07:52:19,819 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 07:52:19,821 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:19,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash -605985150, now seen corresponding path program 1 times [2023-08-27 07:52:19,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:19,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388661159] [2023-08-27 07:52:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:19,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:19,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:19,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:52:19,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:19,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388661159] [2023-08-27 07:52:19,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388661159] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:52:19,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226343371] [2023-08-27 07:52:19,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:19,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:19,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:52:19,872 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:52:19,896 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 07:52:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:19,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:52:19,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:52:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:52:19,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:52:19,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:52:19,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226343371] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:52:19,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:52:19,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 07:52:19,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212008221] [2023-08-27 07:52:19,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:52:19,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:52:19,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:19,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:52:19,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 07:52:19,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 319 [2023-08-27 07:52:19,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 249 flow. Second operand has 7 states, 7 states have (on average 143.0) internal successors, (1001), 7 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:19,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:19,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 319 [2023-08-27 07:52:19,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:20,403 INFO L124 PetriNetUnfolderBase]: 4750/6027 cut-off events. [2023-08-27 07:52:20,403 INFO L125 PetriNetUnfolderBase]: For 12061/12493 co-relation queries the response was YES. [2023-08-27 07:52:20,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20379 conditions, 6027 events. 4750/6027 cut-off events. For 12061/12493 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 25275 event pairs, 931 based on Foata normal form. 416/4348 useless extension candidates. Maximal degree in co-relation 20362. Up to 2803 conditions per place. [2023-08-27 07:52:20,426 INFO L140 encePairwiseOnDemand]: 314/319 looper letters, 158 selfloop transitions, 13 changer transitions 0/174 dead transitions. [2023-08-27 07:52:20,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 174 transitions, 1377 flow [2023-08-27 07:52:20,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 07:52:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 07:52:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1088 transitions. [2023-08-27 07:52:20,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4872369010300045 [2023-08-27 07:52:20,428 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1088 transitions. [2023-08-27 07:52:20,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1088 transitions. [2023-08-27 07:52:20,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:20,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1088 transitions. [2023-08-27 07:52:20,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 155.42857142857142) internal successors, (1088), 7 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:20,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 319.0) internal successors, (2552), 8 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:20,433 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 319.0) internal successors, (2552), 8 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:20,433 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 249 flow. Second operand 7 states and 1088 transitions. [2023-08-27 07:52:20,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 174 transitions, 1377 flow [2023-08-27 07:52:20,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 174 transitions, 1243 flow, removed 54 selfloop flow, removed 1 redundant places. [2023-08-27 07:52:20,444 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 309 flow [2023-08-27 07:52:20,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=309, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2023-08-27 07:52:20,445 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2023-08-27 07:52:20,445 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 309 flow [2023-08-27 07:52:20,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 143.0) internal successors, (1001), 7 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:20,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:20,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:52:20,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 07:52:20,650 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 07:52:20,650 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:20,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:20,650 INFO L85 PathProgramCache]: Analyzing trace with hash -605985192, now seen corresponding path program 1 times [2023-08-27 07:52:20,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:20,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055826042] [2023-08-27 07:52:20,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:20,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:52:20,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:20,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055826042] [2023-08-27 07:52:20,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055826042] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:52:20,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915525134] [2023-08-27 07:52:20,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:20,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:20,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:52:20,693 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:52:20,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 07:52:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:20,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:52:20,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:52:20,761 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 07:52:20,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:52:20,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915525134] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:52:20,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:52:20,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 07:52:20,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193612887] [2023-08-27 07:52:20,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:52:20,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:52:20,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:20,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:52:20,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 07:52:20,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 319 [2023-08-27 07:52:20,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 309 flow. Second operand has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:20,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:20,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 319 [2023-08-27 07:52:20,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:21,151 INFO L124 PetriNetUnfolderBase]: 3960/5101 cut-off events. [2023-08-27 07:52:21,151 INFO L125 PetriNetUnfolderBase]: For 8571/8956 co-relation queries the response was YES. [2023-08-27 07:52:21,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19183 conditions, 5101 events. 3960/5101 cut-off events. For 8571/8956 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21731 event pairs, 411 based on Foata normal form. 374/4414 useless extension candidates. Maximal degree in co-relation 19162. Up to 2946 conditions per place. [2023-08-27 07:52:21,172 INFO L140 encePairwiseOnDemand]: 315/319 looper letters, 91 selfloop transitions, 7 changer transitions 0/101 dead transitions. [2023-08-27 07:52:21,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 101 transitions, 734 flow [2023-08-27 07:52:21,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:52:21,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:52:21,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 617 transitions. [2023-08-27 07:52:21,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835423197492163 [2023-08-27 07:52:21,174 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 617 transitions. [2023-08-27 07:52:21,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 617 transitions. [2023-08-27 07:52:21,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:21,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 617 transitions. [2023-08-27 07:52:21,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.25) internal successors, (617), 4 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:21,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 319.0) internal successors, (1595), 5 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:21,177 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 319.0) internal successors, (1595), 5 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:21,177 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 309 flow. Second operand 4 states and 617 transitions. [2023-08-27 07:52:21,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 101 transitions, 734 flow [2023-08-27 07:52:21,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 101 transitions, 713 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 07:52:21,216 INFO L231 Difference]: Finished difference. Result has 63 places, 55 transitions, 275 flow [2023-08-27 07:52:21,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=261, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=275, PETRI_PLACES=63, PETRI_TRANSITIONS=55} [2023-08-27 07:52:21,217 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2023-08-27 07:52:21,217 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 55 transitions, 275 flow [2023-08-27 07:52:21,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:21,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:21,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:52:21,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 07:52:21,421 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 07:52:21,421 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:21,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:21,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1600860071, now seen corresponding path program 1 times [2023-08-27 07:52:21,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:21,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110927791] [2023-08-27 07:52:21,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:21,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:21,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:52:21,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:21,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110927791] [2023-08-27 07:52:21,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110927791] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:52:21,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 07:52:21,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 07:52:21,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712456226] [2023-08-27 07:52:21,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:52:21,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 07:52:21,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:21,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 07:52:21,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 07:52:21,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 319 [2023-08-27 07:52:21,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 55 transitions, 275 flow. Second operand has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:21,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:21,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 319 [2023-08-27 07:52:21,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:21,681 INFO L124 PetriNetUnfolderBase]: 2567/3405 cut-off events. [2023-08-27 07:52:21,681 INFO L125 PetriNetUnfolderBase]: For 7905/8377 co-relation queries the response was YES. [2023-08-27 07:52:21,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13049 conditions, 3405 events. 2567/3405 cut-off events. For 7905/8377 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13529 event pairs, 794 based on Foata normal form. 472/3692 useless extension candidates. Maximal degree in co-relation 13027. Up to 1916 conditions per place. [2023-08-27 07:52:21,692 INFO L140 encePairwiseOnDemand]: 315/319 looper letters, 78 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2023-08-27 07:52:21,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 618 flow [2023-08-27 07:52:21,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 07:52:21,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 07:52:21,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 581 transitions. [2023-08-27 07:52:21,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4553291536050157 [2023-08-27 07:52:21,694 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 581 transitions. [2023-08-27 07:52:21,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 581 transitions. [2023-08-27 07:52:21,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:21,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 581 transitions. [2023-08-27 07:52:21,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:21,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 319.0) internal successors, (1595), 5 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:21,697 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 319.0) internal successors, (1595), 5 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:21,697 INFO L175 Difference]: Start difference. First operand has 63 places, 55 transitions, 275 flow. Second operand 4 states and 581 transitions. [2023-08-27 07:52:21,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 618 flow [2023-08-27 07:52:21,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 84 transitions, 602 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 07:52:21,711 INFO L231 Difference]: Finished difference. Result has 63 places, 54 transitions, 270 flow [2023-08-27 07:52:21,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=63, PETRI_TRANSITIONS=54} [2023-08-27 07:52:21,711 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 25 predicate places. [2023-08-27 07:52:21,711 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 54 transitions, 270 flow [2023-08-27 07:52:21,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.5) internal successors, (554), 4 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:21,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:21,711 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:52:21,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 07:52:21,712 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:21,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:21,712 INFO L85 PathProgramCache]: Analyzing trace with hash -272898261, now seen corresponding path program 1 times [2023-08-27 07:52:21,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:21,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076809752] [2023-08-27 07:52:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:21,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:21,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:21,765 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 07:52:21,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:21,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076809752] [2023-08-27 07:52:21,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076809752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:52:21,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903292997] [2023-08-27 07:52:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:21,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:21,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:52:21,766 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 07:52:21,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 07:52:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:21,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:52:21,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:52:21,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:52:21,851 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:52:21,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903292997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:52:21,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:52:21,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-27 07:52:21,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156979191] [2023-08-27 07:52:21,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:52:21,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:52:21,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:21,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:52:21,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-27 07:52:21,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 319 [2023-08-27 07:52:21,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 54 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:21,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:21,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 319 [2023-08-27 07:52:21,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:22,007 INFO L124 PetriNetUnfolderBase]: 2055/2691 cut-off events. [2023-08-27 07:52:22,007 INFO L125 PetriNetUnfolderBase]: For 6435/6824 co-relation queries the response was YES. [2023-08-27 07:52:22,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9598 conditions, 2691 events. 2055/2691 cut-off events. For 6435/6824 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 10253 event pairs, 994 based on Foata normal form. 614/3250 useless extension candidates. Maximal degree in co-relation 9575. Up to 2669 conditions per place. [2023-08-27 07:52:22,019 INFO L140 encePairwiseOnDemand]: 316/319 looper letters, 47 selfloop transitions, 1 changer transitions 0/52 dead transitions. [2023-08-27 07:52:22,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 52 transitions, 346 flow [2023-08-27 07:52:22,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:52:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:52:22,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 441 transitions. [2023-08-27 07:52:22,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4608150470219436 [2023-08-27 07:52:22,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 441 transitions. [2023-08-27 07:52:22,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 441 transitions. [2023-08-27 07:52:22,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:22,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 441 transitions. [2023-08-27 07:52:22,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.0) internal successors, (441), 3 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 07:52:22,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:22,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:22,023 INFO L175 Difference]: Start difference. First operand has 63 places, 54 transitions, 270 flow. Second operand 3 states and 441 transitions. [2023-08-27 07:52:22,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 52 transitions, 346 flow [2023-08-27 07:52:22,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 52 transitions, 305 flow, removed 5 selfloop flow, removed 9 redundant places. [2023-08-27 07:52:22,037 INFO L231 Difference]: Finished difference. Result has 54 places, 52 transitions, 211 flow [2023-08-27 07:52:22,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=54, PETRI_TRANSITIONS=52} [2023-08-27 07:52:22,037 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2023-08-27 07:52:22,037 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 52 transitions, 211 flow [2023-08-27 07:52:22,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:22,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:22,038 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:52:22,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-27 07:52:22,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:22,243 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:22,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:22,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1155474678, now seen corresponding path program 2 times [2023-08-27 07:52:22,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:22,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740301645] [2023-08-27 07:52:22,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:22,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:22,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:52:22,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:22,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740301645] [2023-08-27 07:52:22,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740301645] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:52:22,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171118962] [2023-08-27 07:52:22,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:52:22,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:22,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:52:22,293 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:52:22,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 07:52:22,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 07:52:22,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:52:22,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 07:52:22,368 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:52:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-27 07:52:22,381 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 07:52:22,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171118962] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 07:52:22,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 07:52:22,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [6] total 7 [2023-08-27 07:52:22,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313534683] [2023-08-27 07:52:22,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:52:22,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 07:52:22,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:22,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 07:52:22,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 07:52:22,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 319 [2023-08-27 07:52:22,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 52 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:22,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:22,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 319 [2023-08-27 07:52:22,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:22,497 INFO L124 PetriNetUnfolderBase]: 1741/2293 cut-off events. [2023-08-27 07:52:22,497 INFO L125 PetriNetUnfolderBase]: For 2657/2902 co-relation queries the response was YES. [2023-08-27 07:52:22,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7051 conditions, 2293 events. 1741/2293 cut-off events. For 2657/2902 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 8214 event pairs, 882 based on Foata normal form. 329/2473 useless extension candidates. Maximal degree in co-relation 7034. Up to 2286 conditions per place. [2023-08-27 07:52:22,505 INFO L140 encePairwiseOnDemand]: 317/319 looper letters, 47 selfloop transitions, 1 changer transitions 0/51 dead transitions. [2023-08-27 07:52:22,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 51 transitions, 297 flow [2023-08-27 07:52:22,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 07:52:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 07:52:22,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 446 transitions. [2023-08-27 07:52:22,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660397074190178 [2023-08-27 07:52:22,507 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 446 transitions. [2023-08-27 07:52:22,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 446 transitions. [2023-08-27 07:52:22,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:22,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 446 transitions. [2023-08-27 07:52:22,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:22,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:22,509 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 319.0) internal successors, (1276), 4 states have internal predecessors, (1276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:22,509 INFO L175 Difference]: Start difference. First operand has 54 places, 52 transitions, 211 flow. Second operand 3 states and 446 transitions. [2023-08-27 07:52:22,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 51 transitions, 297 flow [2023-08-27 07:52:22,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 51 transitions, 280 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-27 07:52:22,521 INFO L231 Difference]: Finished difference. Result has 50 places, 51 transitions, 186 flow [2023-08-27 07:52:22,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=50, PETRI_TRANSITIONS=51} [2023-08-27 07:52:22,521 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 12 predicate places. [2023-08-27 07:52:22,521 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 51 transitions, 186 flow [2023-08-27 07:52:22,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:22,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:22,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:52:22,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 07:52:22,726 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,SelfDestructingSolverStorable13 [2023-08-27 07:52:22,727 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:22,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:22,727 INFO L85 PathProgramCache]: Analyzing trace with hash -2124153488, now seen corresponding path program 1 times [2023-08-27 07:52:22,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:22,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595558169] [2023-08-27 07:52:22,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:22,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:22,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:52:22,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:22,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595558169] [2023-08-27 07:52:22,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595558169] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:52:22,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516699481] [2023-08-27 07:52:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:22,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:22,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:52:22,818 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:52:22,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 07:52:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:22,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 07:52:22,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:52:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:52:22,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:52:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:52:22,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516699481] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 07:52:22,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 07:52:22,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-27 07:52:22,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625247884] [2023-08-27 07:52:22,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:52:22,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 07:52:22,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:22,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 07:52:22,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-27 07:52:22,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 319 [2023-08-27 07:52:22,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 51 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 126.8) internal successors, (634), 5 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:22,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:22,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 319 [2023-08-27 07:52:22,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:23,130 INFO L124 PetriNetUnfolderBase]: 2032/2680 cut-off events. [2023-08-27 07:52:23,130 INFO L125 PetriNetUnfolderBase]: For 1773/1859 co-relation queries the response was YES. [2023-08-27 07:52:23,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6954 conditions, 2680 events. 2032/2680 cut-off events. For 1773/1859 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10275 event pairs, 490 based on Foata normal form. 186/2531 useless extension candidates. Maximal degree in co-relation 6940. Up to 2247 conditions per place. [2023-08-27 07:52:23,139 INFO L140 encePairwiseOnDemand]: 314/319 looper letters, 58 selfloop transitions, 6 changer transitions 0/66 dead transitions. [2023-08-27 07:52:23,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 357 flow [2023-08-27 07:52:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 07:52:23,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 07:52:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 649 transitions. [2023-08-27 07:52:23,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4068965517241379 [2023-08-27 07:52:23,141 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 649 transitions. [2023-08-27 07:52:23,141 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 649 transitions. [2023-08-27 07:52:23,141 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:23,141 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 649 transitions. [2023-08-27 07:52:23,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 129.8) internal successors, (649), 5 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:23,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 319.0) internal successors, (1914), 6 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:23,144 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 319.0) internal successors, (1914), 6 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:23,144 INFO L175 Difference]: Start difference. First operand has 50 places, 51 transitions, 186 flow. Second operand 5 states and 649 transitions. [2023-08-27 07:52:23,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 357 flow [2023-08-27 07:52:23,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 356 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 07:52:23,154 INFO L231 Difference]: Finished difference. Result has 53 places, 49 transitions, 187 flow [2023-08-27 07:52:23,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=53, PETRI_TRANSITIONS=49} [2023-08-27 07:52:23,155 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2023-08-27 07:52:23,155 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 49 transitions, 187 flow [2023-08-27 07:52:23,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 126.8) internal successors, (634), 5 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:23,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:23,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:52:23,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 07:52:23,361 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,SelfDestructingSolverStorable14 [2023-08-27 07:52:23,361 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:23,361 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:23,361 INFO L85 PathProgramCache]: Analyzing trace with hash -452869543, now seen corresponding path program 1 times [2023-08-27 07:52:23,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:23,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248766415] [2023-08-27 07:52:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:23,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:23,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:52:23,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:23,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248766415] [2023-08-27 07:52:23,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248766415] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:52:23,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42453453] [2023-08-27 07:52:23,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:23,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:23,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:52:23,473 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:52:23,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 07:52:23,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:23,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 07:52:23,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:52:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:52:23,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:52:23,652 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 07:52:23,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42453453] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 07:52:23,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 07:52:23,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-08-27 07:52:23,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953156410] [2023-08-27 07:52:23,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 07:52:23,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 07:52:23,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:23,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 07:52:23,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-08-27 07:52:23,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 319 [2023-08-27 07:52:23,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 49 transitions, 187 flow. Second operand has 7 states, 7 states have (on average 118.0) internal successors, (826), 7 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:23,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:23,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 319 [2023-08-27 07:52:23,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:23,880 INFO L124 PetriNetUnfolderBase]: 2343/3132 cut-off events. [2023-08-27 07:52:23,880 INFO L125 PetriNetUnfolderBase]: For 2135/2275 co-relation queries the response was YES. [2023-08-27 07:52:23,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8433 conditions, 3132 events. 2343/3132 cut-off events. For 2135/2275 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12097 event pairs, 254 based on Foata normal form. 140/3111 useless extension candidates. Maximal degree in co-relation 8418. Up to 1559 conditions per place. [2023-08-27 07:52:23,890 INFO L140 encePairwiseOnDemand]: 311/319 looper letters, 87 selfloop transitions, 22 changer transitions 0/111 dead transitions. [2023-08-27 07:52:23,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 111 transitions, 649 flow [2023-08-27 07:52:23,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 07:52:23,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 07:52:23,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 973 transitions. [2023-08-27 07:52:23,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.381269592476489 [2023-08-27 07:52:23,893 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 973 transitions. [2023-08-27 07:52:23,893 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 973 transitions. [2023-08-27 07:52:23,893 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:23,893 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 973 transitions. [2023-08-27 07:52:23,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 121.625) internal successors, (973), 8 states have internal predecessors, (973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:23,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 319.0) internal successors, (2871), 9 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:23,907 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 319.0) internal successors, (2871), 9 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:23,907 INFO L175 Difference]: Start difference. First operand has 53 places, 49 transitions, 187 flow. Second operand 8 states and 973 transitions. [2023-08-27 07:52:23,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 111 transitions, 649 flow [2023-08-27 07:52:23,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 111 transitions, 625 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 07:52:23,914 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 277 flow [2023-08-27 07:52:23,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=277, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2023-08-27 07:52:23,915 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2023-08-27 07:52:23,915 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 277 flow [2023-08-27 07:52:23,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 118.0) internal successors, (826), 7 states have internal predecessors, (826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:23,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:23,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:52:23,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 07:52:24,120 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,SelfDestructingSolverStorable15 [2023-08-27 07:52:24,120 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:24,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:24,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1163628048, now seen corresponding path program 1 times [2023-08-27 07:52:24,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:24,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884785465] [2023-08-27 07:52:24,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:24,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:24,881 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 07:52:24,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:24,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884785465] [2023-08-27 07:52:24,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884785465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:52:24,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817652909] [2023-08-27 07:52:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:24,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:24,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:52:24,894 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:52:24,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 07:52:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:24,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-27 07:52:24,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:52:24,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:52:25,001 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 14 treesize of output 12 [2023-08-27 07:52:25,053 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 07:52:25,086 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:52:25,210 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2023-08-27 07:52:25,272 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 34 treesize of output 32 [2023-08-27 07:52:25,499 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:52:25,500 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 64 treesize of output 42 [2023-08-27 07:52:25,654 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 07:52:25,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:52:29,388 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:52:29,388 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 106 treesize of output 70 [2023-08-27 07:52:29,398 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:52:29,398 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 1020 treesize of output 912 [2023-08-27 07:52:29,414 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 279 treesize of output 255 [2023-08-27 07:52:29,422 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 255 treesize of output 207 [2023-08-27 07:52:29,434 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:52:29,435 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 122 treesize of output 108 [2023-08-27 07:52:29,704 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:52:29,704 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 87 treesize of output 63 [2023-08-27 07:52:29,707 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:52:29,707 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:52:29,712 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:52:29,712 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 80 treesize of output 64 [2023-08-27 07:52:29,720 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:52:29,720 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 36 treesize of output 26 [2023-08-27 07:52:29,737 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:52:29,737 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 77 treesize of output 53 [2023-08-27 07:52:29,740 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:52:29,740 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:52:29,746 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:52:29,746 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 60 [2023-08-27 07:52:29,753 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:52:29,753 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 32 treesize of output 26 [2023-08-27 07:52:29,773 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:52:29,773 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 55 treesize of output 43 [2023-08-27 07:52:29,776 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:52:29,776 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:52:29,782 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:52:29,782 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 51 treesize of output 43 [2023-08-27 07:52:29,789 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:52:29,789 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 23 treesize of output 19 [2023-08-27 07:52:29,855 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 07:52:29,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817652909] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:52:29,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:52:29,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 33 [2023-08-27 07:52:29,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313441587] [2023-08-27 07:52:29,855 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:52:29,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 07:52:29,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:29,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 07:52:29,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1032, Unknown=15, NotChecked=0, Total=1190 [2023-08-27 07:52:29,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 319 [2023-08-27 07:52:29,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 277 flow. Second operand has 35 states, 35 states have (on average 87.77142857142857) internal successors, (3072), 35 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:29,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:29,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 319 [2023-08-27 07:52:29,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:52,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 07:52:56,353 INFO L124 PetriNetUnfolderBase]: 3414/4704 cut-off events. [2023-08-27 07:52:56,353 INFO L125 PetriNetUnfolderBase]: For 6269/6269 co-relation queries the response was YES. [2023-08-27 07:52:56,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15253 conditions, 4704 events. 3414/4704 cut-off events. For 6269/6269 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 19744 event pairs, 721 based on Foata normal form. 2/4492 useless extension candidates. Maximal degree in co-relation 15236. Up to 3661 conditions per place. [2023-08-27 07:52:56,374 INFO L140 encePairwiseOnDemand]: 305/319 looper letters, 227 selfloop transitions, 106 changer transitions 10/343 dead transitions. [2023-08-27 07:52:56,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 343 transitions, 2126 flow [2023-08-27 07:52:56,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-27 07:52:56,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-27 07:52:56,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3292 transitions. [2023-08-27 07:52:56,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2948499776085983 [2023-08-27 07:52:56,382 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3292 transitions. [2023-08-27 07:52:56,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3292 transitions. [2023-08-27 07:52:56,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:56,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3292 transitions. [2023-08-27 07:52:56,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 94.05714285714286) internal successors, (3292), 35 states have internal predecessors, (3292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:56,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 319.0) internal successors, (11484), 36 states have internal predecessors, (11484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:56,401 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 319.0) internal successors, (11484), 36 states have internal predecessors, (11484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:56,401 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 277 flow. Second operand 35 states and 3292 transitions. [2023-08-27 07:52:56,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 343 transitions, 2126 flow [2023-08-27 07:52:56,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 343 transitions, 2067 flow, removed 28 selfloop flow, removed 2 redundant places. [2023-08-27 07:52:56,434 INFO L231 Difference]: Finished difference. Result has 107 places, 157 transitions, 1049 flow [2023-08-27 07:52:56,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1049, PETRI_PLACES=107, PETRI_TRANSITIONS=157} [2023-08-27 07:52:56,434 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 69 predicate places. [2023-08-27 07:52:56,434 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 157 transitions, 1049 flow [2023-08-27 07:52:56,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 87.77142857142857) internal successors, (3072), 35 states have internal predecessors, (3072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:56,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:56,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:52:56,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 07:52:56,640 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,SelfDestructingSolverStorable16 [2023-08-27 07:52:56,640 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:56,641 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:56,641 INFO L85 PathProgramCache]: Analyzing trace with hash 302830458, now seen corresponding path program 2 times [2023-08-27 07:52:56,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:56,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557400045] [2023-08-27 07:52:56,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:56,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:57,187 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 07:52:57,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:57,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557400045] [2023-08-27 07:52:57,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557400045] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:52:57,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096718597] [2023-08-27 07:52:57,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:52:57,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:57,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:52:57,201 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:52:57,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 07:52:57,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:52:57,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:52:57,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 07:52:57,297 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:52:57,557 INFO L322 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2023-08-27 07:52:57,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 73 treesize of output 59 [2023-08-27 07:52:57,641 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 07:52:57,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:52:57,724 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:52:57,724 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 85 treesize of output 45 [2023-08-27 07:52:57,911 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 07:52:57,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096718597] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:52:57,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:52:57,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 23 [2023-08-27 07:52:57,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090468350] [2023-08-27 07:52:57,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:52:57,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 07:52:57,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:52:57,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 07:52:57,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2023-08-27 07:52:57,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 319 [2023-08-27 07:52:57,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 157 transitions, 1049 flow. Second operand has 25 states, 25 states have (on average 98.52) internal successors, (2463), 25 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:57,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:52:57,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 319 [2023-08-27 07:52:57,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:52:59,077 INFO L124 PetriNetUnfolderBase]: 3450/4817 cut-off events. [2023-08-27 07:52:59,077 INFO L125 PetriNetUnfolderBase]: For 16775/16775 co-relation queries the response was YES. [2023-08-27 07:52:59,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19966 conditions, 4817 events. 3450/4817 cut-off events. For 16775/16775 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 20755 event pairs, 777 based on Foata normal form. 23/4618 useless extension candidates. Maximal degree in co-relation 19932. Up to 4346 conditions per place. [2023-08-27 07:52:59,103 INFO L140 encePairwiseOnDemand]: 307/319 looper letters, 186 selfloop transitions, 80 changer transitions 8/274 dead transitions. [2023-08-27 07:52:59,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 274 transitions, 2409 flow [2023-08-27 07:52:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 07:52:59,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 07:52:59,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2160 transitions. [2023-08-27 07:52:59,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32243618450515005 [2023-08-27 07:52:59,107 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2160 transitions. [2023-08-27 07:52:59,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2160 transitions. [2023-08-27 07:52:59,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:52:59,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2160 transitions. [2023-08-27 07:52:59,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 102.85714285714286) internal successors, (2160), 21 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:59,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 319.0) internal successors, (7018), 22 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:59,117 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 319.0) internal successors, (7018), 22 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:59,117 INFO L175 Difference]: Start difference. First operand has 107 places, 157 transitions, 1049 flow. Second operand 21 states and 2160 transitions. [2023-08-27 07:52:59,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 274 transitions, 2409 flow [2023-08-27 07:52:59,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 274 transitions, 2341 flow, removed 26 selfloop flow, removed 5 redundant places. [2023-08-27 07:52:59,172 INFO L231 Difference]: Finished difference. Result has 135 places, 212 transitions, 1761 flow [2023-08-27 07:52:59,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1761, PETRI_PLACES=135, PETRI_TRANSITIONS=212} [2023-08-27 07:52:59,172 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 97 predicate places. [2023-08-27 07:52:59,172 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 212 transitions, 1761 flow [2023-08-27 07:52:59,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.52) internal successors, (2463), 25 states have internal predecessors, (2463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:52:59,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:52:59,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:52:59,178 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 07:52:59,378 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,SelfDestructingSolverStorable17 [2023-08-27 07:52:59,378 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:52:59,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:52:59,378 INFO L85 PathProgramCache]: Analyzing trace with hash -741500462, now seen corresponding path program 3 times [2023-08-27 07:52:59,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:52:59,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084071734] [2023-08-27 07:52:59,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:52:59,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:52:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:52:59,889 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 07:52:59,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:52:59,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084071734] [2023-08-27 07:52:59,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084071734] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:52:59,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198822524] [2023-08-27 07:52:59,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:52:59,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:52:59,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:52:59,891 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:52:59,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 07:52:59,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 07:52:59,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:52:59,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 07:52:59,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:00,275 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:53:00,277 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:00,277 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 54 treesize of output 33 [2023-08-27 07:53:00,326 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 07:53:00,327 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:00,425 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:00,426 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 85 treesize of output 45 [2023-08-27 07:53:00,634 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 07:53:00,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198822524] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:00,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:00,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2023-08-27 07:53:00,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286675978] [2023-08-27 07:53:00,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:00,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 07:53:00,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:00,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 07:53:00,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=442, Unknown=0, NotChecked=0, Total=552 [2023-08-27 07:53:00,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 319 [2023-08-27 07:53:00,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 212 transitions, 1761 flow. Second operand has 24 states, 24 states have (on average 98.16666666666667) internal successors, (2356), 24 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:00,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:00,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 319 [2023-08-27 07:53:00,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:01,659 INFO L124 PetriNetUnfolderBase]: 3662/5151 cut-off events. [2023-08-27 07:53:01,659 INFO L125 PetriNetUnfolderBase]: For 28224/28224 co-relation queries the response was YES. [2023-08-27 07:53:01,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23887 conditions, 5151 events. 3662/5151 cut-off events. For 28224/28224 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 22993 event pairs, 788 based on Foata normal form. 2/5153 useless extension candidates. Maximal degree in co-relation 23839. Up to 4723 conditions per place. [2023-08-27 07:53:01,684 INFO L140 encePairwiseOnDemand]: 305/319 looper letters, 214 selfloop transitions, 104 changer transitions 3/321 dead transitions. [2023-08-27 07:53:01,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 321 transitions, 3417 flow [2023-08-27 07:53:01,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 07:53:01,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 07:53:01,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1343 transitions. [2023-08-27 07:53:01,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3238485652278756 [2023-08-27 07:53:01,686 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1343 transitions. [2023-08-27 07:53:01,686 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1343 transitions. [2023-08-27 07:53:01,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:01,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1343 transitions. [2023-08-27 07:53:01,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 103.3076923076923) internal successors, (1343), 13 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:01,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 319.0) internal successors, (4466), 14 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:01,691 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 319.0) internal successors, (4466), 14 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:01,691 INFO L175 Difference]: Start difference. First operand has 135 places, 212 transitions, 1761 flow. Second operand 13 states and 1343 transitions. [2023-08-27 07:53:01,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 321 transitions, 3417 flow [2023-08-27 07:53:01,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 321 transitions, 3220 flow, removed 94 selfloop flow, removed 3 redundant places. [2023-08-27 07:53:01,767 INFO L231 Difference]: Finished difference. Result has 151 places, 268 transitions, 2557 flow [2023-08-27 07:53:01,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2557, PETRI_PLACES=151, PETRI_TRANSITIONS=268} [2023-08-27 07:53:01,767 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 113 predicate places. [2023-08-27 07:53:01,768 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 268 transitions, 2557 flow [2023-08-27 07:53:01,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 98.16666666666667) internal successors, (2356), 24 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:01,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:01,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:01,789 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 07:53:01,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:01,973 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:01,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:01,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1039826296, now seen corresponding path program 4 times [2023-08-27 07:53:01,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:01,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296362048] [2023-08-27 07:53:01,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:01,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:02,397 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 07:53:02,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:02,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296362048] [2023-08-27 07:53:02,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296362048] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:02,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396196675] [2023-08-27 07:53:02,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:53:02,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:02,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:02,399 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:53:02,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 07:53:02,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:53:02,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:02,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 07:53:02,490 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:02,775 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:53:02,777 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:02,777 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 54 treesize of output 33 [2023-08-27 07:53:02,839 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 07:53:02,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:02,913 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:02,913 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 85 treesize of output 45 [2023-08-27 07:53:03,065 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 07:53:03,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396196675] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:03,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:03,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-08-27 07:53:03,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992182037] [2023-08-27 07:53:03,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:03,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 07:53:03,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:03,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 07:53:03,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-08-27 07:53:03,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 319 [2023-08-27 07:53:03,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 268 transitions, 2557 flow. Second operand has 25 states, 25 states have (on average 98.48) internal successors, (2462), 25 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:03,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:03,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 319 [2023-08-27 07:53:03,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:04,116 INFO L124 PetriNetUnfolderBase]: 3765/5328 cut-off events. [2023-08-27 07:53:04,116 INFO L125 PetriNetUnfolderBase]: For 32791/32791 co-relation queries the response was YES. [2023-08-27 07:53:04,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26578 conditions, 5328 events. 3765/5328 cut-off events. For 32791/32791 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 24198 event pairs, 778 based on Foata normal form. 2/5330 useless extension candidates. Maximal degree in co-relation 26522. Up to 4867 conditions per place. [2023-08-27 07:53:04,146 INFO L140 encePairwiseOnDemand]: 308/319 looper letters, 215 selfloop transitions, 139 changer transitions 1/355 dead transitions. [2023-08-27 07:53:04,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 355 transitions, 4110 flow [2023-08-27 07:53:04,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 07:53:04,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 07:53:04,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1435 transitions. [2023-08-27 07:53:04,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3213166144200627 [2023-08-27 07:53:04,148 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1435 transitions. [2023-08-27 07:53:04,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1435 transitions. [2023-08-27 07:53:04,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:04,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1435 transitions. [2023-08-27 07:53:04,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 102.5) internal successors, (1435), 14 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:04,153 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 319.0) internal successors, (4785), 15 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:04,153 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 319.0) internal successors, (4785), 15 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:04,154 INFO L175 Difference]: Start difference. First operand has 151 places, 268 transitions, 2557 flow. Second operand 14 states and 1435 transitions. [2023-08-27 07:53:04,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 355 transitions, 4110 flow [2023-08-27 07:53:04,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 355 transitions, 4016 flow, removed 31 selfloop flow, removed 3 redundant places. [2023-08-27 07:53:04,262 INFO L231 Difference]: Finished difference. Result has 165 places, 313 transitions, 3376 flow [2023-08-27 07:53:04,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=3376, PETRI_PLACES=165, PETRI_TRANSITIONS=313} [2023-08-27 07:53:04,263 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 127 predicate places. [2023-08-27 07:53:04,263 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 313 transitions, 3376 flow [2023-08-27 07:53:04,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.48) internal successors, (2462), 25 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:04,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:04,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:04,269 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 07:53:04,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:04,468 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:04,469 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:04,469 INFO L85 PathProgramCache]: Analyzing trace with hash -205107796, now seen corresponding path program 5 times [2023-08-27 07:53:04,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:04,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653080659] [2023-08-27 07:53:04,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:04,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:04,873 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 07:53:04,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:04,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653080659] [2023-08-27 07:53:04,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653080659] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:04,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268595516] [2023-08-27 07:53:04,873 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 07:53:04,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:04,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:04,874 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:53:04,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 07:53:04,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 07:53:04,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:04,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 07:53:04,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:05,176 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:05,177 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 71 [2023-08-27 07:53:05,602 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 07:53:05,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:05,698 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 07:53:05,699 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 85 treesize of output 41 [2023-08-27 07:53:05,755 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 07:53:05,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268595516] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:05,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:05,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 20 [2023-08-27 07:53:05,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451070151] [2023-08-27 07:53:05,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:05,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 07:53:05,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:05,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 07:53:05,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2023-08-27 07:53:05,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 319 [2023-08-27 07:53:05,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 313 transitions, 3376 flow. Second operand has 22 states, 22 states have (on average 98.81818181818181) internal successors, (2174), 22 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 07:53:05,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:05,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 319 [2023-08-27 07:53:05,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:07,672 INFO L124 PetriNetUnfolderBase]: 4253/6115 cut-off events. [2023-08-27 07:53:07,672 INFO L125 PetriNetUnfolderBase]: For 43230/43230 co-relation queries the response was YES. [2023-08-27 07:53:07,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32206 conditions, 6115 events. 4253/6115 cut-off events. For 43230/43230 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 29428 event pairs, 731 based on Foata normal form. 3/6118 useless extension candidates. Maximal degree in co-relation 32145. Up to 4933 conditions per place. [2023-08-27 07:53:07,721 INFO L140 encePairwiseOnDemand]: 305/319 looper letters, 256 selfloop transitions, 222 changer transitions 16/494 dead transitions. [2023-08-27 07:53:07,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 494 transitions, 5989 flow [2023-08-27 07:53:07,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 07:53:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 07:53:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2482 transitions. [2023-08-27 07:53:07,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3241901776384535 [2023-08-27 07:53:07,724 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2482 transitions. [2023-08-27 07:53:07,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2482 transitions. [2023-08-27 07:53:07,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:07,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2482 transitions. [2023-08-27 07:53:07,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 103.41666666666667) internal successors, (2482), 24 states have internal predecessors, (2482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:07,732 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 319.0) internal successors, (7975), 25 states have internal predecessors, (7975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:07,733 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 319.0) internal successors, (7975), 25 states have internal predecessors, (7975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:07,733 INFO L175 Difference]: Start difference. First operand has 165 places, 313 transitions, 3376 flow. Second operand 24 states and 2482 transitions. [2023-08-27 07:53:07,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 494 transitions, 5989 flow [2023-08-27 07:53:07,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 494 transitions, 5888 flow, removed 23 selfloop flow, removed 3 redundant places. [2023-08-27 07:53:07,912 INFO L231 Difference]: Finished difference. Result has 192 places, 394 transitions, 4678 flow [2023-08-27 07:53:07,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4678, PETRI_PLACES=192, PETRI_TRANSITIONS=394} [2023-08-27 07:53:07,913 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 154 predicate places. [2023-08-27 07:53:07,913 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 394 transitions, 4678 flow [2023-08-27 07:53:07,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.81818181818181) internal successors, (2174), 22 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 07:53:07,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:07,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:07,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-27 07:53:08,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:08,116 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:08,116 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:08,116 INFO L85 PathProgramCache]: Analyzing trace with hash -888653164, now seen corresponding path program 6 times [2023-08-27 07:53:08,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:08,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003712684] [2023-08-27 07:53:08,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:08,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:08,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:08,652 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 07:53:08,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:08,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003712684] [2023-08-27 07:53:08,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003712684] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:08,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802283744] [2023-08-27 07:53:08,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 07:53:08,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:08,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:08,654 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:53:08,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 07:53:08,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 07:53:08,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:08,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 07:53:08,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:08,985 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:53:08,987 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:08,987 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 55 treesize of output 34 [2023-08-27 07:53:09,039 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 07:53:09,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:09,093 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:09,093 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 85 treesize of output 45 [2023-08-27 07:53:09,243 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 07:53:09,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802283744] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:09,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:09,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 22 [2023-08-27 07:53:09,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807182412] [2023-08-27 07:53:09,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:09,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 07:53:09,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:09,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 07:53:09,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2023-08-27 07:53:09,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 319 [2023-08-27 07:53:09,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 394 transitions, 4678 flow. Second operand has 24 states, 24 states have (on average 98.58333333333333) internal successors, (2366), 24 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:09,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:09,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 319 [2023-08-27 07:53:09,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:11,264 INFO L124 PetriNetUnfolderBase]: 4375/6293 cut-off events. [2023-08-27 07:53:11,264 INFO L125 PetriNetUnfolderBase]: For 55533/55533 co-relation queries the response was YES. [2023-08-27 07:53:11,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36804 conditions, 6293 events. 4375/6293 cut-off events. For 55533/55533 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 30444 event pairs, 841 based on Foata normal form. 2/6295 useless extension candidates. Maximal degree in co-relation 36735. Up to 5582 conditions per place. [2023-08-27 07:53:11,338 INFO L140 encePairwiseOnDemand]: 305/319 looper letters, 329 selfloop transitions, 186 changer transitions 4/519 dead transitions. [2023-08-27 07:53:11,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 519 transitions, 7051 flow [2023-08-27 07:53:11,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 07:53:11,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 07:53:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2359 transitions. [2023-08-27 07:53:11,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32152105765299166 [2023-08-27 07:53:11,341 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2359 transitions. [2023-08-27 07:53:11,341 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2359 transitions. [2023-08-27 07:53:11,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:11,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2359 transitions. [2023-08-27 07:53:11,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 102.56521739130434) internal successors, (2359), 23 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:11,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 319.0) internal successors, (7656), 24 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:11,365 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 319.0) internal successors, (7656), 24 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:11,365 INFO L175 Difference]: Start difference. First operand has 192 places, 394 transitions, 4678 flow. Second operand 23 states and 2359 transitions. [2023-08-27 07:53:11,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 519 transitions, 7051 flow [2023-08-27 07:53:11,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 519 transitions, 6328 flow, removed 278 selfloop flow, removed 10 redundant places. [2023-08-27 07:53:11,695 INFO L231 Difference]: Finished difference. Result has 208 places, 445 transitions, 5214 flow [2023-08-27 07:53:11,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=4137, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=5214, PETRI_PLACES=208, PETRI_TRANSITIONS=445} [2023-08-27 07:53:11,696 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 170 predicate places. [2023-08-27 07:53:11,696 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 445 transitions, 5214 flow [2023-08-27 07:53:11,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 98.58333333333333) internal successors, (2366), 24 states have internal predecessors, (2366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:11,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:11,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:11,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 07:53:11,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-27 07:53:11,901 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:11,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:11,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1933809728, now seen corresponding path program 7 times [2023-08-27 07:53:11,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:11,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664542037] [2023-08-27 07:53:11,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:11,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:12,603 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 07:53:12,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:12,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664542037] [2023-08-27 07:53:12,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664542037] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:12,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185257064] [2023-08-27 07:53:12,604 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 07:53:12,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:12,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:12,605 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:53:12,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 07:53:12,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:12,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 07:53:12,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:13,029 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:53:13,031 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:13,031 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 55 treesize of output 34 [2023-08-27 07:53:13,084 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 07:53:13,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:13,198 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:13,198 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 73 treesize of output 45 [2023-08-27 07:53:13,418 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 07:53:13,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185257064] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:13,419 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:13,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 29 [2023-08-27 07:53:13,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387755923] [2023-08-27 07:53:13,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:13,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 07:53:13,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:13,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 07:53:13,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2023-08-27 07:53:13,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 319 [2023-08-27 07:53:13,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 445 transitions, 5214 flow. Second operand has 31 states, 31 states have (on average 87.96774193548387) internal successors, (2727), 31 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:13,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:13,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 319 [2023-08-27 07:53:13,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:15,449 INFO L124 PetriNetUnfolderBase]: 4651/6730 cut-off events. [2023-08-27 07:53:15,449 INFO L125 PetriNetUnfolderBase]: For 56698/56698 co-relation queries the response was YES. [2023-08-27 07:53:15,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38756 conditions, 6730 events. 4651/6730 cut-off events. For 56698/56698 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 33506 event pairs, 851 based on Foata normal form. 3/6717 useless extension candidates. Maximal degree in co-relation 38683. Up to 5738 conditions per place. [2023-08-27 07:53:15,491 INFO L140 encePairwiseOnDemand]: 306/319 looper letters, 325 selfloop transitions, 245 changer transitions 12/582 dead transitions. [2023-08-27 07:53:15,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 582 transitions, 7696 flow [2023-08-27 07:53:15,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 07:53:15,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 07:53:15,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1972 transitions. [2023-08-27 07:53:15,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2943722943722944 [2023-08-27 07:53:15,494 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1972 transitions. [2023-08-27 07:53:15,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1972 transitions. [2023-08-27 07:53:15,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:15,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1972 transitions. [2023-08-27 07:53:15,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 93.9047619047619) internal successors, (1972), 21 states have internal predecessors, (1972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:15,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 319.0) internal successors, (7018), 22 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:15,499 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 319.0) internal successors, (7018), 22 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:15,499 INFO L175 Difference]: Start difference. First operand has 208 places, 445 transitions, 5214 flow. Second operand 21 states and 1972 transitions. [2023-08-27 07:53:15,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 582 transitions, 7696 flow [2023-08-27 07:53:15,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 582 transitions, 7382 flow, removed 51 selfloop flow, removed 13 redundant places. [2023-08-27 07:53:15,661 INFO L231 Difference]: Finished difference. Result has 220 places, 490 transitions, 6033 flow [2023-08-27 07:53:15,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=4900, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=6033, PETRI_PLACES=220, PETRI_TRANSITIONS=490} [2023-08-27 07:53:15,661 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 182 predicate places. [2023-08-27 07:53:15,661 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 490 transitions, 6033 flow [2023-08-27 07:53:15,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 87.96774193548387) internal successors, (2727), 31 states have internal predecessors, (2727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:15,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:15,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:15,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 07:53:15,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:15,867 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:15,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:15,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1991898364, now seen corresponding path program 8 times [2023-08-27 07:53:15,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:15,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580209104] [2023-08-27 07:53:15,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:15,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:16,286 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 07:53:16,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:16,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580209104] [2023-08-27 07:53:16,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580209104] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:16,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121109922] [2023-08-27 07:53:16,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:53:16,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:16,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:16,288 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:53:16,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 07:53:16,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:53:16,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:16,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 07:53:16,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:16,668 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:16,669 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 79 [2023-08-27 07:53:17,003 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 07:53:17,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:17,101 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:17,102 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 73 treesize of output 45 [2023-08-27 07:53:17,283 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 07:53:17,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121109922] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:17,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:17,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2023-08-27 07:53:17,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611443413] [2023-08-27 07:53:17,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:17,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 07:53:17,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:17,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 07:53:17,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2023-08-27 07:53:17,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 319 [2023-08-27 07:53:17,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 490 transitions, 6033 flow. Second operand has 25 states, 25 states have (on average 98.08) internal successors, (2452), 25 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:17,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:17,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 319 [2023-08-27 07:53:17,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:19,478 INFO L124 PetriNetUnfolderBase]: 4843/7087 cut-off events. [2023-08-27 07:53:19,479 INFO L125 PetriNetUnfolderBase]: For 69179/69179 co-relation queries the response was YES. [2023-08-27 07:53:19,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43070 conditions, 7087 events. 4843/7087 cut-off events. For 69179/69179 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 36404 event pairs, 872 based on Foata normal form. 2/7081 useless extension candidates. Maximal degree in co-relation 42994. Up to 6305 conditions per place. [2023-08-27 07:53:19,528 INFO L140 encePairwiseOnDemand]: 304/319 looper letters, 353 selfloop transitions, 248 changer transitions 20/621 dead transitions. [2023-08-27 07:53:19,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 621 transitions, 8549 flow [2023-08-27 07:53:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 07:53:19,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 07:53:19,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2156 transitions. [2023-08-27 07:53:19,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3218390804597701 [2023-08-27 07:53:19,543 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2156 transitions. [2023-08-27 07:53:19,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2156 transitions. [2023-08-27 07:53:19,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:19,544 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2156 transitions. [2023-08-27 07:53:19,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 102.66666666666667) internal successors, (2156), 21 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:19,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 319.0) internal successors, (7018), 22 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:19,556 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 319.0) internal successors, (7018), 22 states have internal predecessors, (7018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:19,556 INFO L175 Difference]: Start difference. First operand has 220 places, 490 transitions, 6033 flow. Second operand 21 states and 2156 transitions. [2023-08-27 07:53:19,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 621 transitions, 8549 flow [2023-08-27 07:53:19,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 621 transitions, 8040 flow, removed 168 selfloop flow, removed 12 redundant places. [2023-08-27 07:53:19,763 INFO L231 Difference]: Finished difference. Result has 237 places, 545 transitions, 7079 flow [2023-08-27 07:53:19,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=5646, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7079, PETRI_PLACES=237, PETRI_TRANSITIONS=545} [2023-08-27 07:53:19,763 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 199 predicate places. [2023-08-27 07:53:19,763 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 545 transitions, 7079 flow [2023-08-27 07:53:19,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.08) internal successors, (2452), 25 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:19,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:19,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:19,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-27 07:53:19,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:19,969 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:19,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:19,969 INFO L85 PathProgramCache]: Analyzing trace with hash -84432894, now seen corresponding path program 9 times [2023-08-27 07:53:19,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:19,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574985564] [2023-08-27 07:53:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:19,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:20,313 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 07:53:20,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:20,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574985564] [2023-08-27 07:53:20,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574985564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:20,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065667464] [2023-08-27 07:53:20,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:53:20,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:20,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:20,314 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:53:20,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-27 07:53:20,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 07:53:20,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:20,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 07:53:20,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:20,719 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:20,720 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 71 [2023-08-27 07:53:20,960 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 07:53:20,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:21,063 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:21,065 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 73 treesize of output 45 [2023-08-27 07:53:21,206 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 07:53:21,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065667464] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:21,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:21,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2023-08-27 07:53:21,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355331378] [2023-08-27 07:53:21,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:21,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 07:53:21,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:21,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 07:53:21,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-08-27 07:53:21,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 319 [2023-08-27 07:53:21,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 545 transitions, 7079 flow. Second operand has 21 states, 21 states have (on average 106.42857142857143) internal successors, (2235), 21 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:21,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:21,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 319 [2023-08-27 07:53:21,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:22,612 INFO L124 PetriNetUnfolderBase]: 4730/6959 cut-off events. [2023-08-27 07:53:22,613 INFO L125 PetriNetUnfolderBase]: For 76384/76563 co-relation queries the response was YES. [2023-08-27 07:53:22,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44152 conditions, 6959 events. 4730/6959 cut-off events. For 76384/76563 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 36647 event pairs, 989 based on Foata normal form. 109/6991 useless extension candidates. Maximal degree in co-relation 44066. Up to 6277 conditions per place. [2023-08-27 07:53:22,715 INFO L140 encePairwiseOnDemand]: 310/319 looper letters, 426 selfloop transitions, 143 changer transitions 6/594 dead transitions. [2023-08-27 07:53:22,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 594 transitions, 8728 flow [2023-08-27 07:53:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 07:53:22,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 07:53:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1556 transitions. [2023-08-27 07:53:22,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.348410210479176 [2023-08-27 07:53:22,717 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1556 transitions. [2023-08-27 07:53:22,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1556 transitions. [2023-08-27 07:53:22,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:22,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1556 transitions. [2023-08-27 07:53:22,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 111.14285714285714) internal successors, (1556), 14 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:22,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 319.0) internal successors, (4785), 15 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:22,721 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 319.0) internal successors, (4785), 15 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:22,721 INFO L175 Difference]: Start difference. First operand has 237 places, 545 transitions, 7079 flow. Second operand 14 states and 1556 transitions. [2023-08-27 07:53:22,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 594 transitions, 8728 flow [2023-08-27 07:53:22,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 594 transitions, 8322 flow, removed 146 selfloop flow, removed 7 redundant places. [2023-08-27 07:53:22,988 INFO L231 Difference]: Finished difference. Result has 246 places, 553 transitions, 7132 flow [2023-08-27 07:53:22,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=6705, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=7132, PETRI_PLACES=246, PETRI_TRANSITIONS=553} [2023-08-27 07:53:22,989 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 208 predicate places. [2023-08-27 07:53:22,989 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 553 transitions, 7132 flow [2023-08-27 07:53:22,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 106.42857142857143) internal successors, (2235), 21 states have internal predecessors, (2235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:22,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:22,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:22,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-27 07:53:23,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:23,194 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:23,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:23,195 INFO L85 PathProgramCache]: Analyzing trace with hash 109915478, now seen corresponding path program 10 times [2023-08-27 07:53:23,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:23,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920125404] [2023-08-27 07:53:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:23,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:23,620 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 07:53:23,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:23,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920125404] [2023-08-27 07:53:23,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920125404] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:23,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649809827] [2023-08-27 07:53:23,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:53:23,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:23,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:23,622 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:53:23,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-27 07:53:23,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:53:23,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:23,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 07:53:23,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:23,987 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 31 [2023-08-27 07:53:24,022 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 07:53:24,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:24,102 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:24,102 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 73 treesize of output 45 [2023-08-27 07:53:24,239 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 07:53:24,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649809827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:24,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:24,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 23 [2023-08-27 07:53:24,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741485471] [2023-08-27 07:53:24,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:24,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 07:53:24,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:24,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 07:53:24,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2023-08-27 07:53:24,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 319 [2023-08-27 07:53:24,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 553 transitions, 7132 flow. Second operand has 25 states, 25 states have (on average 98.16) internal successors, (2454), 25 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:24,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:24,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 319 [2023-08-27 07:53:24,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:26,128 INFO L124 PetriNetUnfolderBase]: 4911/7163 cut-off events. [2023-08-27 07:53:26,128 INFO L125 PetriNetUnfolderBase]: For 81132/81132 co-relation queries the response was YES. [2023-08-27 07:53:26,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46265 conditions, 7163 events. 4911/7163 cut-off events. For 81132/81132 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 36665 event pairs, 930 based on Foata normal form. 2/7157 useless extension candidates. Maximal degree in co-relation 46177. Up to 6468 conditions per place. [2023-08-27 07:53:26,179 INFO L140 encePairwiseOnDemand]: 304/319 looper letters, 349 selfloop transitions, 241 changer transitions 12/602 dead transitions. [2023-08-27 07:53:26,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 602 transitions, 8664 flow [2023-08-27 07:53:26,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 07:53:26,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 07:53:26,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1750 transitions. [2023-08-27 07:53:26,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32269961276046466 [2023-08-27 07:53:26,182 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1750 transitions. [2023-08-27 07:53:26,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1750 transitions. [2023-08-27 07:53:26,182 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:26,182 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1750 transitions. [2023-08-27 07:53:26,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 102.94117647058823) internal successors, (1750), 17 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:26,186 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 319.0) internal successors, (5742), 18 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:26,187 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 319.0) internal successors, (5742), 18 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:26,187 INFO L175 Difference]: Start difference. First operand has 246 places, 553 transitions, 7132 flow. Second operand 17 states and 1750 transitions. [2023-08-27 07:53:26,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 602 transitions, 8664 flow [2023-08-27 07:53:26,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 602 transitions, 8410 flow, removed 52 selfloop flow, removed 5 redundant places. [2023-08-27 07:53:26,466 INFO L231 Difference]: Finished difference. Result has 256 places, 549 transitions, 7309 flow [2023-08-27 07:53:26,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=6851, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7309, PETRI_PLACES=256, PETRI_TRANSITIONS=549} [2023-08-27 07:53:26,466 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 218 predicate places. [2023-08-27 07:53:26,466 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 549 transitions, 7309 flow [2023-08-27 07:53:26,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 98.16) internal successors, (2454), 25 states have internal predecessors, (2454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:26,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:26,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:26,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-27 07:53:26,671 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,SelfDestructingSolverStorable25 [2023-08-27 07:53:26,671 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:26,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:26,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1805978008, now seen corresponding path program 11 times [2023-08-27 07:53:26,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:26,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227460172] [2023-08-27 07:53:26,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:26,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:26,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:27,061 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 07:53:27,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:27,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227460172] [2023-08-27 07:53:27,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227460172] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:27,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451124882] [2023-08-27 07:53:27,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 07:53:27,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:27,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:27,063 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:53:27,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-27 07:53:27,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:53:27,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:27,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 07:53:27,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:27,534 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:53:27,536 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:27,536 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 55 treesize of output 34 [2023-08-27 07:53:27,586 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 07:53:27,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:27,701 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:53:27,701 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 73 treesize of output 45 [2023-08-27 07:53:27,872 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 07:53:27,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451124882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:27,872 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:27,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8] total 19 [2023-08-27 07:53:27,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138532015] [2023-08-27 07:53:27,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:27,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 07:53:27,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:27,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 07:53:27,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2023-08-27 07:53:27,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 319 [2023-08-27 07:53:27,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 549 transitions, 7309 flow. Second operand has 21 states, 21 states have (on average 106.47619047619048) internal successors, (2236), 21 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:27,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:27,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 319 [2023-08-27 07:53:27,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:29,443 INFO L124 PetriNetUnfolderBase]: 4719/6925 cut-off events. [2023-08-27 07:53:29,443 INFO L125 PetriNetUnfolderBase]: For 76275/76454 co-relation queries the response was YES. [2023-08-27 07:53:29,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44520 conditions, 6925 events. 4719/6925 cut-off events. For 76275/76454 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 36287 event pairs, 1009 based on Foata normal form. 106/6953 useless extension candidates. Maximal degree in co-relation 44431. Up to 6276 conditions per place. [2023-08-27 07:53:29,493 INFO L140 encePairwiseOnDemand]: 310/319 looper letters, 418 selfloop transitions, 138 changer transitions 8/583 dead transitions. [2023-08-27 07:53:29,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 583 transitions, 8751 flow [2023-08-27 07:53:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 07:53:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 07:53:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1447 transitions. [2023-08-27 07:53:29,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34892693513383166 [2023-08-27 07:53:29,496 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1447 transitions. [2023-08-27 07:53:29,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1447 transitions. [2023-08-27 07:53:29,496 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:29,496 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1447 transitions. [2023-08-27 07:53:29,498 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 111.3076923076923) internal successors, (1447), 13 states have internal predecessors, (1447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:29,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 319.0) internal successors, (4466), 14 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:29,500 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 319.0) internal successors, (4466), 14 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:29,500 INFO L175 Difference]: Start difference. First operand has 256 places, 549 transitions, 7309 flow. Second operand 13 states and 1447 transitions. [2023-08-27 07:53:29,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 583 transitions, 8751 flow [2023-08-27 07:53:29,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 583 transitions, 8290 flow, removed 7 selfloop flow, removed 13 redundant places. [2023-08-27 07:53:29,743 INFO L231 Difference]: Finished difference. Result has 254 places, 548 transitions, 7115 flow [2023-08-27 07:53:29,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=6839, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7115, PETRI_PLACES=254, PETRI_TRANSITIONS=548} [2023-08-27 07:53:29,743 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 216 predicate places. [2023-08-27 07:53:29,744 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 548 transitions, 7115 flow [2023-08-27 07:53:29,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 106.47619047619048) internal successors, (2236), 21 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:29,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:29,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:29,749 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 07:53:29,948 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,SelfDestructingSolverStorable26 [2023-08-27 07:53:29,949 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:29,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1469948366, now seen corresponding path program 1 times [2023-08-27 07:53:29,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:29,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531883652] [2023-08-27 07:53:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:29,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:53:30,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:30,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531883652] [2023-08-27 07:53:30,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531883652] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:30,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520570329] [2023-08-27 07:53:30,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:30,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:30,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:30,067 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 07:53:30,069 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 07:53:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:30,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 07:53:30,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:53:30,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:53:30,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520570329] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:30,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:30,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-27 07:53:30,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941569103] [2023-08-27 07:53:30,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:30,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 07:53:30,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:30,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 07:53:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-08-27 07:53:30,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 319 [2023-08-27 07:53:30,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 548 transitions, 7115 flow. Second operand has 16 states, 16 states have (on average 117.4375) internal successors, (1879), 16 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:30,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:30,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 319 [2023-08-27 07:53:30,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:31,680 INFO L124 PetriNetUnfolderBase]: 4874/7144 cut-off events. [2023-08-27 07:53:31,681 INFO L125 PetriNetUnfolderBase]: For 81195/81282 co-relation queries the response was YES. [2023-08-27 07:53:31,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46007 conditions, 7144 events. 4874/7144 cut-off events. For 81195/81282 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 37317 event pairs, 1408 based on Foata normal form. 76/7188 useless extension candidates. Maximal degree in co-relation 45918. Up to 4501 conditions per place. [2023-08-27 07:53:31,735 INFO L140 encePairwiseOnDemand]: 311/319 looper letters, 549 selfloop transitions, 67 changer transitions 25/663 dead transitions. [2023-08-27 07:53:31,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 663 transitions, 9590 flow [2023-08-27 07:53:31,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 07:53:31,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 07:53:31,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1246 transitions. [2023-08-27 07:53:31,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39059561128526643 [2023-08-27 07:53:31,736 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1246 transitions. [2023-08-27 07:53:31,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1246 transitions. [2023-08-27 07:53:31,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:31,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1246 transitions. [2023-08-27 07:53:31,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 124.6) internal successors, (1246), 10 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:31,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:31,739 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:31,740 INFO L175 Difference]: Start difference. First operand has 254 places, 548 transitions, 7115 flow. Second operand 10 states and 1246 transitions. [2023-08-27 07:53:31,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 663 transitions, 9590 flow [2023-08-27 07:53:32,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 663 transitions, 9297 flow, removed 1 selfloop flow, removed 9 redundant places. [2023-08-27 07:53:32,010 INFO L231 Difference]: Finished difference. Result has 260 places, 560 transitions, 7286 flow [2023-08-27 07:53:32,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7286, PETRI_PLACES=260, PETRI_TRANSITIONS=560} [2023-08-27 07:53:32,011 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 222 predicate places. [2023-08-27 07:53:32,011 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 560 transitions, 7286 flow [2023-08-27 07:53:32,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 117.4375) internal successors, (1879), 16 states have internal predecessors, (1879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:32,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:32,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:32,016 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 07:53:32,215 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,SelfDestructingSolverStorable27 [2023-08-27 07:53:32,215 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:32,215 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:32,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1342918898, now seen corresponding path program 2 times [2023-08-27 07:53:32,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:32,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172526966] [2023-08-27 07:53:32,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:32,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:32,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:32,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172526966] [2023-08-27 07:53:32,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172526966] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:32,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053505634] [2023-08-27 07:53:32,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:53:32,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:32,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:32,329 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 07:53:32,331 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 07:53:32,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:53:32,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:32,441 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 07:53:32,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:32,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:32,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053505634] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:32,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:32,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-27 07:53:32,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508316595] [2023-08-27 07:53:32,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:32,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 07:53:32,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:32,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 07:53:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-08-27 07:53:32,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 319 [2023-08-27 07:53:32,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 560 transitions, 7286 flow. Second operand has 17 states, 17 states have (on average 117.11764705882354) internal successors, (1991), 17 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:32,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:32,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 319 [2023-08-27 07:53:32,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:34,073 INFO L124 PetriNetUnfolderBase]: 5209/7595 cut-off events. [2023-08-27 07:53:34,073 INFO L125 PetriNetUnfolderBase]: For 102295/102382 co-relation queries the response was YES. [2023-08-27 07:53:34,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51299 conditions, 7595 events. 5209/7595 cut-off events. For 102295/102382 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 39809 event pairs, 1405 based on Foata normal form. 128/7691 useless extension candidates. Maximal degree in co-relation 51204. Up to 4501 conditions per place. [2023-08-27 07:53:34,125 INFO L140 encePairwiseOnDemand]: 310/319 looper letters, 582 selfloop transitions, 100 changer transitions 12/716 dead transitions. [2023-08-27 07:53:34,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 716 transitions, 10401 flow [2023-08-27 07:53:34,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 07:53:34,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 07:53:34,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1244 transitions. [2023-08-27 07:53:34,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38996865203761755 [2023-08-27 07:53:34,127 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1244 transitions. [2023-08-27 07:53:34,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1244 transitions. [2023-08-27 07:53:34,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:34,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1244 transitions. [2023-08-27 07:53:34,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 124.4) internal successors, (1244), 10 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:34,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:34,130 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:34,130 INFO L175 Difference]: Start difference. First operand has 260 places, 560 transitions, 7286 flow. Second operand 10 states and 1244 transitions. [2023-08-27 07:53:34,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 716 transitions, 10401 flow [2023-08-27 07:53:34,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 716 transitions, 10352 flow, removed 21 selfloop flow, removed 5 redundant places. [2023-08-27 07:53:34,476 INFO L231 Difference]: Finished difference. Result has 266 places, 591 transitions, 8005 flow [2023-08-27 07:53:34,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=7247, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8005, PETRI_PLACES=266, PETRI_TRANSITIONS=591} [2023-08-27 07:53:34,477 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 228 predicate places. [2023-08-27 07:53:34,477 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 591 transitions, 8005 flow [2023-08-27 07:53:34,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 117.11764705882354) internal successors, (1991), 17 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:34,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:34,478 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:34,486 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 07:53:34,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:34,682 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:34,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:34,682 INFO L85 PathProgramCache]: Analyzing trace with hash -217744950, now seen corresponding path program 12 times [2023-08-27 07:53:34,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:34,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474062022] [2023-08-27 07:53:34,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:34,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:34,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:34,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:34,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:34,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474062022] [2023-08-27 07:53:34,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474062022] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:34,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993946679] [2023-08-27 07:53:34,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 07:53:34,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:34,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:34,749 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 07:53:34,751 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 07:53:34,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 07:53:34,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:34,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 07:53:34,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:34,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:34,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:35,035 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 07:53:35,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993946679] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:35,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:35,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 18 [2023-08-27 07:53:35,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000405447] [2023-08-27 07:53:35,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:35,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 07:53:35,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:35,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 07:53:35,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-27 07:53:35,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 319 [2023-08-27 07:53:35,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 591 transitions, 8005 flow. Second operand has 19 states, 19 states have (on average 113.52631578947368) internal successors, (2157), 19 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:35,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:35,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 319 [2023-08-27 07:53:35,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:37,081 INFO L124 PetriNetUnfolderBase]: 5031/7234 cut-off events. [2023-08-27 07:53:37,081 INFO L125 PetriNetUnfolderBase]: For 110446/110446 co-relation queries the response was YES. [2023-08-27 07:53:37,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52252 conditions, 7234 events. 5031/7234 cut-off events. For 110446/110446 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 36164 event pairs, 1276 based on Foata normal form. 314/7536 useless extension candidates. Maximal degree in co-relation 52155. Up to 2987 conditions per place. [2023-08-27 07:53:37,130 INFO L140 encePairwiseOnDemand]: 307/319 looper letters, 655 selfloop transitions, 326 changer transitions 1/982 dead transitions. [2023-08-27 07:53:37,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 982 transitions, 14186 flow [2023-08-27 07:53:37,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-27 07:53:37,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-27 07:53:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4489 transitions. [2023-08-27 07:53:37,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37031842930209535 [2023-08-27 07:53:37,134 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4489 transitions. [2023-08-27 07:53:37,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4489 transitions. [2023-08-27 07:53:37,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:37,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4489 transitions. [2023-08-27 07:53:37,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 118.13157894736842) internal successors, (4489), 38 states have internal predecessors, (4489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:37,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 319.0) internal successors, (12441), 39 states have internal predecessors, (12441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:37,144 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 319.0) internal successors, (12441), 39 states have internal predecessors, (12441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:37,144 INFO L175 Difference]: Start difference. First operand has 266 places, 591 transitions, 8005 flow. Second operand 38 states and 4489 transitions. [2023-08-27 07:53:37,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 982 transitions, 14186 flow [2023-08-27 07:53:37,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 982 transitions, 13883 flow, removed 62 selfloop flow, removed 9 redundant places. [2023-08-27 07:53:37,544 INFO L231 Difference]: Finished difference. Result has 314 places, 773 transitions, 11552 flow [2023-08-27 07:53:37,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=7574, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=11552, PETRI_PLACES=314, PETRI_TRANSITIONS=773} [2023-08-27 07:53:37,545 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 276 predicate places. [2023-08-27 07:53:37,545 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 773 transitions, 11552 flow [2023-08-27 07:53:37,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 113.52631578947368) internal successors, (2157), 19 states have internal predecessors, (2157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:37,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:37,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:37,550 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-27 07:53:37,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:37,750 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:37,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:37,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1190238657, now seen corresponding path program 13 times [2023-08-27 07:53:37,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:37,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861324002] [2023-08-27 07:53:37,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:37,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:37,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:37,837 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 07:53:37,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:37,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861324002] [2023-08-27 07:53:37,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861324002] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:37,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203855517] [2023-08-27 07:53:37,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 07:53:37,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:37,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:37,838 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 07:53:37,840 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 07:53:37,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:37,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 07:53:37,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:38,047 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 07:53:38,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:38,094 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 07:53:38,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203855517] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:38,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:38,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-27 07:53:38,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360007723] [2023-08-27 07:53:38,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:38,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 07:53:38,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:38,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 07:53:38,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-08-27 07:53:38,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 319 [2023-08-27 07:53:38,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 773 transitions, 11552 flow. Second operand has 14 states, 14 states have (on average 122.0) internal successors, (1708), 14 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:38,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:38,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 319 [2023-08-27 07:53:38,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:39,450 INFO L124 PetriNetUnfolderBase]: 4347/6412 cut-off events. [2023-08-27 07:53:39,450 INFO L125 PetriNetUnfolderBase]: For 118449/118753 co-relation queries the response was YES. [2023-08-27 07:53:39,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49194 conditions, 6412 events. 4347/6412 cut-off events. For 118449/118753 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 33876 event pairs, 1185 based on Foata normal form. 385/6743 useless extension candidates. Maximal degree in co-relation 49080. Up to 3963 conditions per place. [2023-08-27 07:53:39,502 INFO L140 encePairwiseOnDemand]: 313/319 looper letters, 607 selfloop transitions, 49 changer transitions 87/795 dead transitions. [2023-08-27 07:53:39,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 795 transitions, 13183 flow [2023-08-27 07:53:39,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 07:53:39,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 07:53:39,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 896 transitions. [2023-08-27 07:53:39,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4012539184952978 [2023-08-27 07:53:39,503 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 896 transitions. [2023-08-27 07:53:39,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 896 transitions. [2023-08-27 07:53:39,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:39,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 896 transitions. [2023-08-27 07:53:39,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.0) internal successors, (896), 7 states have internal predecessors, (896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:39,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 319.0) internal successors, (2552), 8 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:39,505 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 319.0) internal successors, (2552), 8 states have internal predecessors, (2552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:39,505 INFO L175 Difference]: Start difference. First operand has 314 places, 773 transitions, 11552 flow. Second operand 7 states and 896 transitions. [2023-08-27 07:53:39,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 795 transitions, 13183 flow [2023-08-27 07:53:40,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 795 transitions, 11426 flow, removed 527 selfloop flow, removed 12 redundant places. [2023-08-27 07:53:40,124 INFO L231 Difference]: Finished difference. Result has 311 places, 668 transitions, 8494 flow [2023-08-27 07:53:40,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=9531, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=746, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=697, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8494, PETRI_PLACES=311, PETRI_TRANSITIONS=668} [2023-08-27 07:53:40,124 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 273 predicate places. [2023-08-27 07:53:40,125 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 668 transitions, 8494 flow [2023-08-27 07:53:40,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 122.0) internal successors, (1708), 14 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:40,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:40,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:40,129 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 07:53:40,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-27 07:53:40,329 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:40,330 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:40,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2069834808, now seen corresponding path program 3 times [2023-08-27 07:53:40,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:40,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464743996] [2023-08-27 07:53:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:40,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:40,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:40,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:40,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464743996] [2023-08-27 07:53:40,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464743996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:40,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710913544] [2023-08-27 07:53:40,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:53:40,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:40,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:40,415 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 07:53:40,416 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 07:53:40,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 07:53:40,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:40,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 07:53:40,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:40,622 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:40,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:40,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710913544] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:40,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:40,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-27 07:53:40,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283772772] [2023-08-27 07:53:40,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:40,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 07:53:40,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:40,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 07:53:40,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-27 07:53:40,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 319 [2023-08-27 07:53:40,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 668 transitions, 8494 flow. Second operand has 18 states, 18 states have (on average 117.05555555555556) internal successors, (2107), 18 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:40,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:40,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 319 [2023-08-27 07:53:40,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:41,933 INFO L124 PetriNetUnfolderBase]: 3905/5687 cut-off events. [2023-08-27 07:53:41,933 INFO L125 PetriNetUnfolderBase]: For 94314/94391 co-relation queries the response was YES. [2023-08-27 07:53:41,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40700 conditions, 5687 events. 3905/5687 cut-off events. For 94314/94391 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 28456 event pairs, 1164 based on Foata normal form. 137/5793 useless extension candidates. Maximal degree in co-relation 40595. Up to 4078 conditions per place. [2023-08-27 07:53:41,987 INFO L140 encePairwiseOnDemand]: 310/319 looper letters, 593 selfloop transitions, 49 changer transitions 60/731 dead transitions. [2023-08-27 07:53:41,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 731 transitions, 10560 flow [2023-08-27 07:53:41,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 07:53:41,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 07:53:41,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1235 transitions. [2023-08-27 07:53:41,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871473354231975 [2023-08-27 07:53:41,991 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1235 transitions. [2023-08-27 07:53:41,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1235 transitions. [2023-08-27 07:53:41,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:41,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1235 transitions. [2023-08-27 07:53:41,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 123.5) internal successors, (1235), 10 states have internal predecessors, (1235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:41,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:41,994 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:41,994 INFO L175 Difference]: Start difference. First operand has 311 places, 668 transitions, 8494 flow. Second operand 10 states and 1235 transitions. [2023-08-27 07:53:41,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 731 transitions, 10560 flow [2023-08-27 07:53:42,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 731 transitions, 10135 flow, removed 133 selfloop flow, removed 20 redundant places. [2023-08-27 07:53:42,479 INFO L231 Difference]: Finished difference. Result has 295 places, 629 transitions, 7696 flow [2023-08-27 07:53:42,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=7958, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7696, PETRI_PLACES=295, PETRI_TRANSITIONS=629} [2023-08-27 07:53:42,480 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 257 predicate places. [2023-08-27 07:53:42,480 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 629 transitions, 7696 flow [2023-08-27 07:53:42,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 117.05555555555556) internal successors, (2107), 18 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:42,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:42,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:42,501 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 07:53:42,681 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,SelfDestructingSolverStorable31 [2023-08-27 07:53:42,681 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:42,681 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:42,681 INFO L85 PathProgramCache]: Analyzing trace with hash 818837386, now seen corresponding path program 4 times [2023-08-27 07:53:42,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:42,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863846303] [2023-08-27 07:53:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:42,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:42,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:42,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863846303] [2023-08-27 07:53:42,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863846303] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:42,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986957340] [2023-08-27 07:53:42,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:53:42,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:42,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:42,777 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 07:53:42,828 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 07:53:42,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:53:42,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:42,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 07:53:42,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:43,021 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:43,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:43,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986957340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:43,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:43,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-27 07:53:43,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945042115] [2023-08-27 07:53:43,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:43,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 07:53:43,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:43,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 07:53:43,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-08-27 07:53:43,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 319 [2023-08-27 07:53:43,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 629 transitions, 7696 flow. Second operand has 17 states, 17 states have (on average 117.11764705882354) internal successors, (1991), 17 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:43,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:43,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 319 [2023-08-27 07:53:43,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:44,163 INFO L124 PetriNetUnfolderBase]: 3636/5213 cut-off events. [2023-08-27 07:53:44,163 INFO L125 PetriNetUnfolderBase]: For 75223/75292 co-relation queries the response was YES. [2023-08-27 07:53:44,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35963 conditions, 5213 events. 3636/5213 cut-off events. For 75223/75292 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24610 event pairs, 1071 based on Foata normal form. 79/5261 useless extension candidates. Maximal degree in co-relation 35870. Up to 4078 conditions per place. [2023-08-27 07:53:44,207 INFO L140 encePairwiseOnDemand]: 309/319 looper letters, 606 selfloop transitions, 43 changer transitions 9/687 dead transitions. [2023-08-27 07:53:44,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 687 transitions, 9463 flow [2023-08-27 07:53:44,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 07:53:44,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 07:53:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1230 transitions. [2023-08-27 07:53:44,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38557993730407525 [2023-08-27 07:53:44,209 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1230 transitions. [2023-08-27 07:53:44,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1230 transitions. [2023-08-27 07:53:44,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:44,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1230 transitions. [2023-08-27 07:53:44,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 123.0) internal successors, (1230), 10 states have internal predecessors, (1230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:44,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:44,211 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:44,212 INFO L175 Difference]: Start difference. First operand has 295 places, 629 transitions, 7696 flow. Second operand 10 states and 1230 transitions. [2023-08-27 07:53:44,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 687 transitions, 9463 flow [2023-08-27 07:53:44,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 687 transitions, 9245 flow, removed 30 selfloop flow, removed 11 redundant places. [2023-08-27 07:53:44,473 INFO L231 Difference]: Finished difference. Result has 290 places, 632 transitions, 7648 flow [2023-08-27 07:53:44,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=7471, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7648, PETRI_PLACES=290, PETRI_TRANSITIONS=632} [2023-08-27 07:53:44,474 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 252 predicate places. [2023-08-27 07:53:44,474 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 632 transitions, 7648 flow [2023-08-27 07:53:44,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 117.11764705882354) internal successors, (1991), 17 states have internal predecessors, (1991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:44,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:44,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:44,481 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 07:53:44,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:44,679 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:44,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:44,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1129266370, now seen corresponding path program 5 times [2023-08-27 07:53:44,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:44,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50778895] [2023-08-27 07:53:44,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:44,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:44,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:44,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:44,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50778895] [2023-08-27 07:53:44,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50778895] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:44,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003323915] [2023-08-27 07:53:44,809 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 07:53:44,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:44,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:44,810 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 07:53:44,812 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 07:53:44,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 07:53:44,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:44,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 07:53:44,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:44,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:44,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:45,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003323915] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:45,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:45,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-27 07:53:45,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419234633] [2023-08-27 07:53:45,044 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:45,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 07:53:45,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:45,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 07:53:45,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-08-27 07:53:45,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 319 [2023-08-27 07:53:45,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 632 transitions, 7648 flow. Second operand has 16 states, 16 states have (on average 117.3125) internal successors, (1877), 16 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:45,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:45,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 319 [2023-08-27 07:53:45,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:45,835 INFO L124 PetriNetUnfolderBase]: 3260/4699 cut-off events. [2023-08-27 07:53:45,835 INFO L125 PetriNetUnfolderBase]: For 64159/64228 co-relation queries the response was YES. [2023-08-27 07:53:45,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32393 conditions, 4699 events. 3260/4699 cut-off events. For 64159/64228 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22020 event pairs, 1021 based on Foata normal form. 139/4807 useless extension candidates. Maximal degree in co-relation 32302. Up to 4078 conditions per place. [2023-08-27 07:53:45,873 INFO L140 encePairwiseOnDemand]: 312/319 looper letters, 496 selfloop transitions, 3 changer transitions 100/622 dead transitions. [2023-08-27 07:53:45,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 622 transitions, 8568 flow [2023-08-27 07:53:45,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 07:53:45,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 07:53:45,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 980 transitions. [2023-08-27 07:53:45,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384012539184953 [2023-08-27 07:53:45,874 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 980 transitions. [2023-08-27 07:53:45,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 980 transitions. [2023-08-27 07:53:45,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:45,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 980 transitions. [2023-08-27 07:53:45,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 122.5) internal successors, (980), 8 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:45,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 319.0) internal successors, (2871), 9 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:45,877 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 319.0) internal successors, (2871), 9 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:45,877 INFO L175 Difference]: Start difference. First operand has 290 places, 632 transitions, 7648 flow. Second operand 8 states and 980 transitions. [2023-08-27 07:53:45,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 622 transitions, 8568 flow [2023-08-27 07:53:46,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 622 transitions, 8457 flow, removed 30 selfloop flow, removed 7 redundant places. [2023-08-27 07:53:46,084 INFO L231 Difference]: Finished difference. Result has 286 places, 522 transitions, 6101 flow [2023-08-27 07:53:46,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=7074, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6101, PETRI_PLACES=286, PETRI_TRANSITIONS=522} [2023-08-27 07:53:46,085 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 248 predicate places. [2023-08-27 07:53:46,085 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 522 transitions, 6101 flow [2023-08-27 07:53:46,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 117.3125) internal successors, (1877), 16 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:46,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:46,085 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:46,092 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 07:53:46,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:46,290 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:46,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:46,290 INFO L85 PathProgramCache]: Analyzing trace with hash -598704549, now seen corresponding path program 14 times [2023-08-27 07:53:46,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:46,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808749493] [2023-08-27 07:53:46,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:46,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:46,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:53:46,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:46,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808749493] [2023-08-27 07:53:46,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808749493] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:46,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248364444] [2023-08-27 07:53:46,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:53:46,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:46,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:46,381 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 07:53:46,381 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 07:53:46,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:53:46,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:46,499 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 07:53:46,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:46,589 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:53:46,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:46,682 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 07:53:46,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248364444] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:46,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:46,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-27 07:53:46,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262759839] [2023-08-27 07:53:46,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:46,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 07:53:46,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:46,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 07:53:46,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-08-27 07:53:46,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 319 [2023-08-27 07:53:46,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 522 transitions, 6101 flow. Second operand has 20 states, 20 states have (on average 117.1) internal successors, (2342), 20 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:46,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:46,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 319 [2023-08-27 07:53:46,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:47,850 INFO L124 PetriNetUnfolderBase]: 4535/6191 cut-off events. [2023-08-27 07:53:47,850 INFO L125 PetriNetUnfolderBase]: For 97685/97744 co-relation queries the response was YES. [2023-08-27 07:53:47,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43667 conditions, 6191 events. 4535/6191 cut-off events. For 97685/97744 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26788 event pairs, 605 based on Foata normal form. 57/6213 useless extension candidates. Maximal degree in co-relation 43579. Up to 2355 conditions per place. [2023-08-27 07:53:47,904 INFO L140 encePairwiseOnDemand]: 310/319 looper letters, 541 selfloop transitions, 274 changer transitions 0/838 dead transitions. [2023-08-27 07:53:47,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 838 transitions, 10652 flow [2023-08-27 07:53:47,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 07:53:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 07:53:47,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2333 transitions. [2023-08-27 07:53:47,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3849199802012869 [2023-08-27 07:53:47,906 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2333 transitions. [2023-08-27 07:53:47,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2333 transitions. [2023-08-27 07:53:47,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:47,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2333 transitions. [2023-08-27 07:53:47,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 122.78947368421052) internal successors, (2333), 19 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:47,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 319.0) internal successors, (6380), 20 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:47,911 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 319.0) internal successors, (6380), 20 states have internal predecessors, (6380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:47,911 INFO L175 Difference]: Start difference. First operand has 286 places, 522 transitions, 6101 flow. Second operand 19 states and 2333 transitions. [2023-08-27 07:53:47,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 838 transitions, 10652 flow [2023-08-27 07:53:48,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 838 transitions, 10332 flow, removed 69 selfloop flow, removed 14 redundant places. [2023-08-27 07:53:48,242 INFO L231 Difference]: Finished difference. Result has 250 places, 590 transitions, 7719 flow [2023-08-27 07:53:48,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=5911, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=7719, PETRI_PLACES=250, PETRI_TRANSITIONS=590} [2023-08-27 07:53:48,243 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 212 predicate places. [2023-08-27 07:53:48,243 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 590 transitions, 7719 flow [2023-08-27 07:53:48,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 117.1) internal successors, (2342), 20 states have internal predecessors, (2342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:48,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:48,243 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:48,250 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-08-27 07:53:48,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:48,448 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:48,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:48,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1890016319, now seen corresponding path program 15 times [2023-08-27 07:53:48,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:48,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443943124] [2023-08-27 07:53:48,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:48,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:48,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:53:48,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:48,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443943124] [2023-08-27 07:53:48,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443943124] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:48,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667599387] [2023-08-27 07:53:48,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 07:53:48,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:48,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:48,540 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 07:53:48,542 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 07:53:48,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 07:53:48,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:48,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 07:53:48,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:48,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:53:48,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:48,835 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 07:53:48,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667599387] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:48,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:48,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-27 07:53:48,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877289363] [2023-08-27 07:53:48,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:48,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 07:53:48,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:48,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 07:53:48,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-08-27 07:53:48,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 319 [2023-08-27 07:53:48,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 590 transitions, 7719 flow. Second operand has 18 states, 18 states have (on average 117.22222222222223) internal successors, (2110), 18 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:48,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:48,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 319 [2023-08-27 07:53:48,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:49,925 INFO L124 PetriNetUnfolderBase]: 4671/6403 cut-off events. [2023-08-27 07:53:49,926 INFO L125 PetriNetUnfolderBase]: For 101856/101894 co-relation queries the response was YES. [2023-08-27 07:53:49,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45550 conditions, 6403 events. 4671/6403 cut-off events. For 101856/101894 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 28064 event pairs, 1145 based on Foata normal form. 62/6433 useless extension candidates. Maximal degree in co-relation 45468. Up to 4445 conditions per place. [2023-08-27 07:53:49,987 INFO L140 encePairwiseOnDemand]: 310/319 looper letters, 474 selfloop transitions, 153 changer transitions 0/649 dead transitions. [2023-08-27 07:53:49,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 649 transitions, 9515 flow [2023-08-27 07:53:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 07:53:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 07:53:49,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1218 transitions. [2023-08-27 07:53:49,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2023-08-27 07:53:49,989 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1218 transitions. [2023-08-27 07:53:49,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1218 transitions. [2023-08-27 07:53:49,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:49,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1218 transitions. [2023-08-27 07:53:49,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 121.8) internal successors, (1218), 10 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:49,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:49,993 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:49,993 INFO L175 Difference]: Start difference. First operand has 250 places, 590 transitions, 7719 flow. Second operand 10 states and 1218 transitions. [2023-08-27 07:53:49,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 649 transitions, 9515 flow [2023-08-27 07:53:50,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 649 transitions, 8831 flow, removed 298 selfloop flow, removed 9 redundant places. [2023-08-27 07:53:50,504 INFO L231 Difference]: Finished difference. Result has 244 places, 571 transitions, 7357 flow [2023-08-27 07:53:50,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=6793, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7357, PETRI_PLACES=244, PETRI_TRANSITIONS=571} [2023-08-27 07:53:50,504 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 206 predicate places. [2023-08-27 07:53:50,504 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 571 transitions, 7357 flow [2023-08-27 07:53:50,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 117.22222222222223) internal successors, (2110), 18 states have internal predecessors, (2110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:50,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:50,505 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:50,512 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 07:53:50,706 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,SelfDestructingSolverStorable35 [2023-08-27 07:53:50,706 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:50,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:50,707 INFO L85 PathProgramCache]: Analyzing trace with hash -253861449, now seen corresponding path program 16 times [2023-08-27 07:53:50,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:50,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397843639] [2023-08-27 07:53:50,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:50,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:50,833 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:53:50,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:50,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397843639] [2023-08-27 07:53:50,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397843639] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:50,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120526580] [2023-08-27 07:53:50,834 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 07:53:50,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:50,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:50,835 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 07:53:50,839 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 07:53:50,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 07:53:50,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:50,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 07:53:50,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:53:51,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:51,144 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 07:53:51,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120526580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:51,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:51,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-27 07:53:51,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452605109] [2023-08-27 07:53:51,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:51,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 07:53:51,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:51,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 07:53:51,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2023-08-27 07:53:51,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 319 [2023-08-27 07:53:51,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 571 transitions, 7357 flow. Second operand has 21 states, 21 states have (on average 117.23809523809524) internal successors, (2462), 21 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:51,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:51,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 319 [2023-08-27 07:53:51,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:52,486 INFO L124 PetriNetUnfolderBase]: 4704/6454 cut-off events. [2023-08-27 07:53:52,486 INFO L125 PetriNetUnfolderBase]: For 65975/66025 co-relation queries the response was YES. [2023-08-27 07:53:52,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41840 conditions, 6454 events. 4704/6454 cut-off events. For 65975/66025 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 28394 event pairs, 685 based on Foata normal form. 43/6478 useless extension candidates. Maximal degree in co-relation 41759. Up to 2519 conditions per place. [2023-08-27 07:53:52,547 INFO L140 encePairwiseOnDemand]: 310/319 looper letters, 502 selfloop transitions, 273 changer transitions 0/797 dead transitions. [2023-08-27 07:53:52,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 797 transitions, 10480 flow [2023-08-27 07:53:52,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 07:53:52,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 07:53:52,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2090 transitions. [2023-08-27 07:53:52,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.385395537525355 [2023-08-27 07:53:52,550 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2090 transitions. [2023-08-27 07:53:52,550 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2090 transitions. [2023-08-27 07:53:52,550 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:52,550 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2090 transitions. [2023-08-27 07:53:52,552 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 122.94117647058823) internal successors, (2090), 17 states have internal predecessors, (2090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:52,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 319.0) internal successors, (5742), 18 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:52,555 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 319.0) internal successors, (5742), 18 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:52,555 INFO L175 Difference]: Start difference. First operand has 244 places, 571 transitions, 7357 flow. Second operand 17 states and 2090 transitions. [2023-08-27 07:53:52,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 797 transitions, 10480 flow [2023-08-27 07:53:52,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 797 transitions, 10255 flow, removed 11 selfloop flow, removed 6 redundant places. [2023-08-27 07:53:52,836 INFO L231 Difference]: Finished difference. Result has 255 places, 577 transitions, 7778 flow [2023-08-27 07:53:52,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=7144, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=267, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=7778, PETRI_PLACES=255, PETRI_TRANSITIONS=577} [2023-08-27 07:53:52,836 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 217 predicate places. [2023-08-27 07:53:52,836 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 577 transitions, 7778 flow [2023-08-27 07:53:52,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 117.23809523809524) internal successors, (2462), 21 states have internal predecessors, (2462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:52,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:52,837 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:52,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-27 07:53:53,041 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,SelfDestructingSolverStorable36 [2023-08-27 07:53:53,042 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:53,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:53,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1078640569, now seen corresponding path program 17 times [2023-08-27 07:53:53,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:53,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267719887] [2023-08-27 07:53:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:53,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:53:53,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:53,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267719887] [2023-08-27 07:53:53,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267719887] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:53,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484615988] [2023-08-27 07:53:53,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 07:53:53,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:53,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:53,158 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 07:53:53,159 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 07:53:53,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:53:53,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:53,285 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 07:53:53,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:53:53,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:53,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:53:53,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484615988] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:53,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:53,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2023-08-27 07:53:53,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421328510] [2023-08-27 07:53:53,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:53,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 07:53:53,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:53,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 07:53:53,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-08-27 07:53:53,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 319 [2023-08-27 07:53:53,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 577 transitions, 7778 flow. Second operand has 19 states, 19 states have (on average 113.47368421052632) internal successors, (2156), 19 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:53,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:53,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 319 [2023-08-27 07:53:53,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:55,094 INFO L124 PetriNetUnfolderBase]: 4747/6489 cut-off events. [2023-08-27 07:53:55,094 INFO L125 PetriNetUnfolderBase]: For 75598/75598 co-relation queries the response was YES. [2023-08-27 07:53:55,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43347 conditions, 6489 events. 4747/6489 cut-off events. For 75598/75598 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 28161 event pairs, 693 based on Foata normal form. 20/6499 useless extension candidates. Maximal degree in co-relation 43265. Up to 2815 conditions per place. [2023-08-27 07:53:55,154 INFO L140 encePairwiseOnDemand]: 307/319 looper letters, 446 selfloop transitions, 322 changer transitions 0/768 dead transitions. [2023-08-27 07:53:55,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 768 transitions, 11281 flow [2023-08-27 07:53:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 07:53:55,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 07:53:55,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3402 transitions. [2023-08-27 07:53:55,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36774402767268405 [2023-08-27 07:53:55,157 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3402 transitions. [2023-08-27 07:53:55,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3402 transitions. [2023-08-27 07:53:55,158 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:55,158 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3402 transitions. [2023-08-27 07:53:55,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 117.3103448275862) internal successors, (3402), 29 states have internal predecessors, (3402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:55,164 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 319.0) internal successors, (9570), 30 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:55,164 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 319.0) internal successors, (9570), 30 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:55,165 INFO L175 Difference]: Start difference. First operand has 255 places, 577 transitions, 7778 flow. Second operand 29 states and 3402 transitions. [2023-08-27 07:53:55,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 768 transitions, 11281 flow [2023-08-27 07:53:55,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 768 transitions, 10653 flow, removed 0 selfloop flow, removed 14 redundant places. [2023-08-27 07:53:55,459 INFO L231 Difference]: Finished difference. Result has 266 places, 619 transitions, 8344 flow [2023-08-27 07:53:55,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=7194, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=8344, PETRI_PLACES=266, PETRI_TRANSITIONS=619} [2023-08-27 07:53:55,460 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 228 predicate places. [2023-08-27 07:53:55,460 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 619 transitions, 8344 flow [2023-08-27 07:53:55,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 113.47368421052632) internal successors, (2156), 19 states have internal predecessors, (2156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:55,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:55,460 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:55,469 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 07:53:55,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-27 07:53:55,665 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:55,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:55,665 INFO L85 PathProgramCache]: Analyzing trace with hash -701765909, now seen corresponding path program 18 times [2023-08-27 07:53:55,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:55,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660708175] [2023-08-27 07:53:55,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:55,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:55,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:55,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:55,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:55,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660708175] [2023-08-27 07:53:55,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660708175] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:55,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23005285] [2023-08-27 07:53:55,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 07:53:55,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:55,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:55,777 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 07:53:55,829 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 07:53:55,964 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 07:53:55,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:53:55,966 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 07:53:55,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:56,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:53:56,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23005285] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:56,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:56,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 07:53:56,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122383560] [2023-08-27 07:53:56,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:56,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 07:53:56,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:56,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 07:53:56,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-27 07:53:56,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 319 [2023-08-27 07:53:56,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 619 transitions, 8344 flow. Second operand has 19 states, 19 states have (on average 117.15789473684211) internal successors, (2226), 19 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:56,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:56,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 319 [2023-08-27 07:53:56,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:57,518 INFO L124 PetriNetUnfolderBase]: 4816/6602 cut-off events. [2023-08-27 07:53:57,518 INFO L125 PetriNetUnfolderBase]: For 70753/70803 co-relation queries the response was YES. [2023-08-27 07:53:57,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43671 conditions, 6602 events. 4816/6602 cut-off events. For 70753/70803 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 28947 event pairs, 840 based on Foata normal form. 43/6624 useless extension candidates. Maximal degree in co-relation 43589. Up to 3195 conditions per place. [2023-08-27 07:53:57,596 INFO L140 encePairwiseOnDemand]: 310/319 looper letters, 484 selfloop transitions, 236 changer transitions 0/741 dead transitions. [2023-08-27 07:53:57,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 741 transitions, 10789 flow [2023-08-27 07:53:57,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 07:53:57,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 07:53:57,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1217 transitions. [2023-08-27 07:53:57,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3815047021943574 [2023-08-27 07:53:57,598 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1217 transitions. [2023-08-27 07:53:57,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1217 transitions. [2023-08-27 07:53:57,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:53:57,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1217 transitions. [2023-08-27 07:53:57,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 121.7) internal successors, (1217), 10 states have internal predecessors, (1217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:57,602 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:57,602 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:57,602 INFO L175 Difference]: Start difference. First operand has 266 places, 619 transitions, 8344 flow. Second operand 10 states and 1217 transitions. [2023-08-27 07:53:57,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 741 transitions, 10789 flow [2023-08-27 07:53:57,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 741 transitions, 10369 flow, removed 24 selfloop flow, removed 16 redundant places. [2023-08-27 07:53:57,990 INFO L231 Difference]: Finished difference. Result has 258 places, 615 transitions, 8399 flow [2023-08-27 07:53:57,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=7927, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8399, PETRI_PLACES=258, PETRI_TRANSITIONS=615} [2023-08-27 07:53:57,991 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 220 predicate places. [2023-08-27 07:53:57,991 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 615 transitions, 8399 flow [2023-08-27 07:53:57,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 117.15789473684211) internal successors, (2226), 19 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:57,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:53:57,992 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:53:57,996 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 07:53:58,196 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,SelfDestructingSolverStorable38 [2023-08-27 07:53:58,197 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:53:58,197 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:53:58,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1339822687, now seen corresponding path program 19 times [2023-08-27 07:53:58,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:53:58,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280453047] [2023-08-27 07:53:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:53:58,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:53:58,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:53:58,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:53:58,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280453047] [2023-08-27 07:53:58,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280453047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:53:58,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597123726] [2023-08-27 07:53:58,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 07:53:58,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:53:58,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:53:58,318 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 07:53:58,333 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 07:53:58,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:53:58,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 07:53:58,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:53:58,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:53:58,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:53:58,626 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 07:53:58,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597123726] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:53:58,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:53:58,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 07:53:58,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183521846] [2023-08-27 07:53:58,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:53:58,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 07:53:58,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:53:58,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 07:53:58,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-08-27 07:53:58,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 319 [2023-08-27 07:53:58,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 615 transitions, 8399 flow. Second operand has 19 states, 19 states have (on average 117.05263157894737) internal successors, (2224), 19 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:53:58,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:53:58,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 319 [2023-08-27 07:53:58,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:53:59,972 INFO L124 PetriNetUnfolderBase]: 4790/6552 cut-off events. [2023-08-27 07:53:59,972 INFO L125 PetriNetUnfolderBase]: For 71879/71929 co-relation queries the response was YES. [2023-08-27 07:53:59,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43679 conditions, 6552 events. 4790/6552 cut-off events. For 71879/71929 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 28507 event pairs, 1416 based on Foata normal form. 45/6576 useless extension candidates. Maximal degree in co-relation 43598. Up to 5176 conditions per place. [2023-08-27 07:54:00,020 INFO L140 encePairwiseOnDemand]: 310/319 looper letters, 521 selfloop transitions, 171 changer transitions 0/713 dead transitions. [2023-08-27 07:54:00,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 713 transitions, 10619 flow [2023-08-27 07:54:00,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 07:54:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 07:54:00,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1211 transitions. [2023-08-27 07:54:00,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3796238244514107 [2023-08-27 07:54:00,022 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1211 transitions. [2023-08-27 07:54:00,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1211 transitions. [2023-08-27 07:54:00,022 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:54:00,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1211 transitions. [2023-08-27 07:54:00,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 121.1) internal successors, (1211), 10 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:00,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:00,024 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:00,024 INFO L175 Difference]: Start difference. First operand has 258 places, 615 transitions, 8399 flow. Second operand 10 states and 1211 transitions. [2023-08-27 07:54:00,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 713 transitions, 10619 flow [2023-08-27 07:54:00,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 713 transitions, 10169 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-27 07:54:00,265 INFO L231 Difference]: Finished difference. Result has 260 places, 621 transitions, 8428 flow [2023-08-27 07:54:00,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=7961, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8428, PETRI_PLACES=260, PETRI_TRANSITIONS=621} [2023-08-27 07:54:00,265 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 222 predicate places. [2023-08-27 07:54:00,265 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 621 transitions, 8428 flow [2023-08-27 07:54:00,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 117.05263157894737) internal successors, (2224), 19 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:00,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:54:00,266 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:54:00,287 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 07:54:00,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-27 07:54:00,470 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:54:00,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:54:00,471 INFO L85 PathProgramCache]: Analyzing trace with hash 233023567, now seen corresponding path program 20 times [2023-08-27 07:54:00,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:54:00,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213353848] [2023-08-27 07:54:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:54:00,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:54:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:54:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:54:00,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:54:00,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213353848] [2023-08-27 07:54:00,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213353848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:54:00,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325217479] [2023-08-27 07:54:00,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:54:00,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:54:00,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:54:00,563 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:54:00,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-27 07:54:00,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:54:00,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:54:00,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 07:54:00,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:54:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:54:00,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:54:00,863 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 07:54:00,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325217479] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:54:00,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:54:00,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 07:54:00,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483108451] [2023-08-27 07:54:00,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:54:00,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 07:54:00,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:54:00,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 07:54:00,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-27 07:54:00,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 319 [2023-08-27 07:54:00,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 621 transitions, 8428 flow. Second operand has 19 states, 19 states have (on average 117.10526315789474) internal successors, (2225), 19 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:00,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:54:00,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 319 [2023-08-27 07:54:00,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:54:02,015 INFO L124 PetriNetUnfolderBase]: 4757/6495 cut-off events. [2023-08-27 07:54:02,015 INFO L125 PetriNetUnfolderBase]: For 73547/73587 co-relation queries the response was YES. [2023-08-27 07:54:02,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43326 conditions, 6495 events. 4757/6495 cut-off events. For 73547/73587 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 28236 event pairs, 1399 based on Foata normal form. 45/6517 useless extension candidates. Maximal degree in co-relation 43244. Up to 5563 conditions per place. [2023-08-27 07:54:02,072 INFO L140 encePairwiseOnDemand]: 310/319 looper letters, 459 selfloop transitions, 163 changer transitions 0/642 dead transitions. [2023-08-27 07:54:02,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 642 transitions, 9722 flow [2023-08-27 07:54:02,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 07:54:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 07:54:02,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1212 transitions. [2023-08-27 07:54:02,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3799373040752351 [2023-08-27 07:54:02,074 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1212 transitions. [2023-08-27 07:54:02,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1212 transitions. [2023-08-27 07:54:02,075 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:54:02,075 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1212 transitions. [2023-08-27 07:54:02,075 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 121.2) internal successors, (1212), 10 states have internal predecessors, (1212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:02,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:02,077 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 319.0) internal successors, (3509), 11 states have internal predecessors, (3509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:02,077 INFO L175 Difference]: Start difference. First operand has 260 places, 621 transitions, 8428 flow. Second operand 10 states and 1212 transitions. [2023-08-27 07:54:02,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 642 transitions, 9722 flow [2023-08-27 07:54:02,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 642 transitions, 9401 flow, removed 11 selfloop flow, removed 7 redundant places. [2023-08-27 07:54:02,348 INFO L231 Difference]: Finished difference. Result has 258 places, 606 transitions, 8295 flow [2023-08-27 07:54:02,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=7969, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8295, PETRI_PLACES=258, PETRI_TRANSITIONS=606} [2023-08-27 07:54:02,348 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 220 predicate places. [2023-08-27 07:54:02,348 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 606 transitions, 8295 flow [2023-08-27 07:54:02,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 117.10526315789474) internal successors, (2225), 19 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:02,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:54:02,349 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:54:02,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-27 07:54:02,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:54:02,556 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:54:02,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:54:02,556 INFO L85 PathProgramCache]: Analyzing trace with hash -867838945, now seen corresponding path program 6 times [2023-08-27 07:54:02,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:54:02,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860089684] [2023-08-27 07:54:02,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:54:02,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:54:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:54:03,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:54:03,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:54:03,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860089684] [2023-08-27 07:54:03,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860089684] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:54:03,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133932410] [2023-08-27 07:54:03,469 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 07:54:03,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:54:03,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:54:03,470 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:54:03,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-27 07:54:03,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 07:54:03,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:54:03,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 07:54:03,584 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:54:04,184 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:54:04,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:54:04,189 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:54:04,189 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 76 [2023-08-27 07:54:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:54:04,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:54:04,747 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:54:04,748 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 315 treesize of output 153 [2023-08-27 07:54:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:54:05,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133932410] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:54:05,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:54:05,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 34 [2023-08-27 07:54:05,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262235716] [2023-08-27 07:54:05,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:54:05,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-27 07:54:05,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:54:05,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-27 07:54:05,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2023-08-27 07:54:05,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 319 [2023-08-27 07:54:05,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 606 transitions, 8295 flow. Second operand has 36 states, 36 states have (on average 98.0) internal successors, (3528), 36 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:05,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:54:05,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 319 [2023-08-27 07:54:05,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:54:19,643 INFO L124 PetriNetUnfolderBase]: 7691/10686 cut-off events. [2023-08-27 07:54:19,643 INFO L125 PetriNetUnfolderBase]: For 115541/115541 co-relation queries the response was YES. [2023-08-27 07:54:19,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73056 conditions, 10686 events. 7691/10686 cut-off events. For 115541/115541 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 52235 event pairs, 1066 based on Foata normal form. 3/10689 useless extension candidates. Maximal degree in co-relation 72974. Up to 7467 conditions per place. [2023-08-27 07:54:19,722 INFO L140 encePairwiseOnDemand]: 303/319 looper letters, 837 selfloop transitions, 738 changer transitions 10/1585 dead transitions. [2023-08-27 07:54:19,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1585 transitions, 23283 flow [2023-08-27 07:54:19,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-08-27 07:54:19,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2023-08-27 07:54:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 8647 transitions. [2023-08-27 07:54:19,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32269741752500375 [2023-08-27 07:54:19,729 INFO L72 ComplementDD]: Start complementDD. Operand 84 states and 8647 transitions. [2023-08-27 07:54:19,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 84 states and 8647 transitions. [2023-08-27 07:54:19,731 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:54:19,731 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 84 states and 8647 transitions. [2023-08-27 07:54:19,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 85 states, 84 states have (on average 102.94047619047619) internal successors, (8647), 84 states have internal predecessors, (8647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:19,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 85 states, 85 states have (on average 319.0) internal successors, (27115), 85 states have internal predecessors, (27115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:19,754 INFO L81 ComplementDD]: Finished complementDD. Result has 85 states, 85 states have (on average 319.0) internal successors, (27115), 85 states have internal predecessors, (27115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:19,754 INFO L175 Difference]: Start difference. First operand has 258 places, 606 transitions, 8295 flow. Second operand 84 states and 8647 transitions. [2023-08-27 07:54:19,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1585 transitions, 23283 flow [2023-08-27 07:54:20,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 1585 transitions, 22562 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-27 07:54:20,457 INFO L231 Difference]: Finished difference. Result has 357 places, 1232 transitions, 19670 flow [2023-08-27 07:54:20,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=7984, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=606, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=84, PETRI_FLOW=19670, PETRI_PLACES=357, PETRI_TRANSITIONS=1232} [2023-08-27 07:54:20,458 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 319 predicate places. [2023-08-27 07:54:20,458 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 1232 transitions, 19670 flow [2023-08-27 07:54:20,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 98.0) internal successors, (3528), 36 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:20,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:54:20,459 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:54:20,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-27 07:54:20,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:54:20,664 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:54:20,664 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:54:20,664 INFO L85 PathProgramCache]: Analyzing trace with hash 935175277, now seen corresponding path program 7 times [2023-08-27 07:54:20,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:54:20,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566891860] [2023-08-27 07:54:20,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:54:20,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:54:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:54:21,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:54:21,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:54:21,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566891860] [2023-08-27 07:54:21,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566891860] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:54:21,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410304906] [2023-08-27 07:54:21,418 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 07:54:21,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:54:21,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:54:21,419 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:54:21,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-27 07:54:21,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:54:21,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-27 07:54:21,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:54:21,639 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 07:54:21,683 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:54:21,720 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:54:21,754 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 07:54:22,330 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:54:22,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:54:22,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:54:22,332 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:54:22,337 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:54:22,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 86 [2023-08-27 07:54:22,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:54:22,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:54:24,328 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse3 (+ c_~max2~0 1)) (.cse1 (+ c_~A~0.offset 4))) (and (or (= c_~max1~0 c_~max2~0) (forall ((v_ArrVal_1765 (Array Int Int)) (~M~0 Int)) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1765) c_~A~0.base))) (let ((.cse2 (select .cse0 c_~A~0.offset))) (or (< c_~max1~0 (select .cse0 .cse1)) (< c_~max2~0 .cse2) (< c_~max1~0 .cse2) (<= ~M~0 0) (< 1 ~M~0) (<= .cse3 (select .cse0 (+ c_~A~0.offset (* ~M~0 4))))))))) (forall ((v_ArrVal_1765 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1765) c_~A~0.base))) (let ((.cse4 (select .cse5 c_~A~0.offset))) (or (= c_~max2~0 .cse4) (< c_~max2~0 .cse4) (<= .cse4 c_~max1~0) (< .cse4 (select .cse5 .cse1)))))) (forall ((v_ArrVal_1765 (Array Int Int))) (let ((.cse8 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1765) c_~A~0.base))) (let ((.cse7 (select .cse8 c_~A~0.offset)) (.cse6 (select .cse8 .cse1))) (or (<= .cse6 .cse7) (forall ((~M~0 Int)) (or (<= ~M~0 0) (< 1 ~M~0) (<= .cse3 (select .cse8 (+ c_~A~0.offset (* ~M~0 4)))))) (<= .cse7 c_~max1~0) (= c_~max2~0 .cse6))))) (forall ((v_ArrVal_1765 (Array Int Int))) (let ((.cse9 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1765) c_~A~0.base))) (let ((.cse10 (select .cse9 c_~A~0.offset))) (or (< c_~max1~0 (select .cse9 .cse1)) (<= .cse10 c_~max2~0) (< c_~max1~0 .cse10) (forall ((~M~0 Int)) (let ((.cse11 (select .cse9 (+ c_~A~0.offset (* ~M~0 4))))) (or (<= .cse11 .cse10) (= c_~max1~0 .cse11) (<= ~M~0 0) (< 1 ~M~0)))))))) (forall ((v_ArrVal_1765 (Array Int Int))) (let ((.cse12 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1765) c_~A~0.base))) (let ((.cse13 (select .cse12 .cse1))) (or (forall ((~M~0 Int)) (or (<= ~M~0 0) (< 1 ~M~0) (<= .cse3 (select .cse12 (+ c_~A~0.offset (* ~M~0 4)))))) (< c_~max1~0 (select .cse12 c_~A~0.offset)) (<= .cse13 c_~max1~0) (= c_~max2~0 .cse13))))) (forall ((v_ArrVal_1765 (Array Int Int))) (let ((.cse15 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1765) c_~A~0.base))) (let ((.cse14 (select .cse15 c_~A~0.offset))) (or (= c_~max1~0 .cse14) (< c_~max1~0 (select .cse15 .cse1)) (<= .cse14 c_~max2~0) (< c_~max1~0 .cse14) (forall ((~M~0 Int)) (or (<= (+ .cse14 1) (select .cse15 (+ c_~A~0.offset (* ~M~0 4)))) (<= ~M~0 0) (< 1 ~M~0))))))) (forall ((v_ArrVal_1765 (Array Int Int))) (let ((.cse16 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1765) c_~A~0.base))) (let ((.cse17 (select .cse16 c_~A~0.offset))) (or (< c_~max1~0 (select .cse16 .cse1)) (< c_~max2~0 .cse17) (forall ((~M~0 Int)) (let ((.cse18 (select .cse16 (+ c_~A~0.offset (* ~M~0 4))))) (or (<= .cse18 c_~max2~0) (= c_~max1~0 .cse18) (<= ~M~0 0) (< 1 ~M~0)))) (< c_~max1~0 .cse17))))))) is different from false [2023-08-27 07:54:25,309 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:54:25,310 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 87 [2023-08-27 07:54:25,329 INFO L322 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-08-27 07:54:25,329 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1093 treesize of output 1049 [2023-08-27 07:54:25,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:54:25,375 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:54:25,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 439 treesize of output 407 [2023-08-27 07:54:25,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:54:25,409 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 218 [2023-08-27 07:54:25,426 INFO L322 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-08-27 07:54:25,427 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 406 treesize of output 346 [2023-08-27 07:54:25,734 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-27 07:54:25,734 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 148 treesize of output 1 [2023-08-27 07:54:25,740 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:54:25,740 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 176 treesize of output 116 [2023-08-27 07:54:25,754 INFO L322 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-08-27 07:54:25,754 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1362 treesize of output 1298 [2023-08-27 07:54:25,789 INFO L322 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-08-27 07:54:25,790 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 620 treesize of output 536 [2023-08-27 07:54:25,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:54:25,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 236 [2023-08-27 07:54:25,834 INFO L322 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-08-27 07:54:25,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 275 treesize of output 235 [2023-08-27 07:54:26,233 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-27 07:54:26,233 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 140 treesize of output 1 [2023-08-27 07:54:26,239 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:54:26,240 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 151 treesize of output 103 [2023-08-27 07:54:26,258 INFO L322 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-08-27 07:54:26,258 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 5466 treesize of output 5230 [2023-08-27 07:54:26,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:54:26,305 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 296 treesize of output 276 [2023-08-27 07:54:26,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:54:26,320 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 236 [2023-08-27 07:54:26,342 INFO L322 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-08-27 07:54:26,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 311 treesize of output 235 [2023-08-27 07:54:26,502 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:54:26,502 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 85 [2023-08-27 07:54:26,517 INFO L322 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-08-27 07:54:26,517 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 509 treesize of output 491 [2023-08-27 07:54:26,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:54:26,541 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 249 treesize of output 235 [2023-08-27 07:54:26,561 INFO L322 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-08-27 07:54:26,562 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 473 treesize of output 421 [2023-08-27 07:54:26,588 INFO L322 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-08-27 07:54:26,588 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 417 treesize of output 393 [2023-08-27 07:54:26,793 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-27 07:54:26,793 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 174 treesize of output 1 [2023-08-27 07:54:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 07:54:26,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410304906] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 07:54:26,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 07:54:26,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 35 [2023-08-27 07:54:26,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132526076] [2023-08-27 07:54:26,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 07:54:26,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-27 07:54:26,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 07:54:26,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-27 07:54:26,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=1093, Unknown=8, NotChecked=68, Total=1332 [2023-08-27 07:54:26,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 319 [2023-08-27 07:54:26,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 1232 transitions, 19670 flow. Second operand has 37 states, 37 states have (on average 87.83783783783784) internal successors, (3250), 37 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:26,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 07:54:26,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 319 [2023-08-27 07:54:26,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 07:54:34,794 INFO L124 PetriNetUnfolderBase]: 9100/12776 cut-off events. [2023-08-27 07:54:34,795 INFO L125 PetriNetUnfolderBase]: For 186546/186546 co-relation queries the response was YES. [2023-08-27 07:54:34,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101112 conditions, 12776 events. 9100/12776 cut-off events. For 186546/186546 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 66067 event pairs, 881 based on Foata normal form. 2/12776 useless extension candidates. Maximal degree in co-relation 101006. Up to 10893 conditions per place. [2023-08-27 07:54:34,919 INFO L140 encePairwiseOnDemand]: 306/319 looper letters, 1193 selfloop transitions, 569 changer transitions 2/1764 dead transitions. [2023-08-27 07:54:34,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1764 transitions, 31614 flow [2023-08-27 07:54:34,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 07:54:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 07:54:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2480 transitions. [2023-08-27 07:54:34,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2990113334940921 [2023-08-27 07:54:34,922 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2480 transitions. [2023-08-27 07:54:34,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2480 transitions. [2023-08-27 07:54:34,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 07:54:34,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2480 transitions. [2023-08-27 07:54:34,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 95.38461538461539) internal successors, (2480), 26 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 07:54:34,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 319.0) internal successors, (8613), 27 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:34,928 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 319.0) internal successors, (8613), 27 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:34,928 INFO L175 Difference]: Start difference. First operand has 357 places, 1232 transitions, 19670 flow. Second operand 26 states and 2480 transitions. [2023-08-27 07:54:34,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1764 transitions, 31614 flow [2023-08-27 07:54:36,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1764 transitions, 29086 flow, removed 1151 selfloop flow, removed 7 redundant places. [2023-08-27 07:54:36,729 INFO L231 Difference]: Finished difference. Result has 389 places, 1564 transitions, 24783 flow [2023-08-27 07:54:36,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=319, PETRI_DIFFERENCE_MINUEND_FLOW=17593, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=309, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=24783, PETRI_PLACES=389, PETRI_TRANSITIONS=1564} [2023-08-27 07:54:36,731 INFO L281 CegarLoopForPetriNet]: 38 programPoint places, 351 predicate places. [2023-08-27 07:54:36,731 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 1564 transitions, 24783 flow [2023-08-27 07:54:36,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 87.83783783783784) internal successors, (3250), 37 states have internal predecessors, (3250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 07:54:36,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 07:54:36,731 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 07:54:36,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-27 07:54:36,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:54:36,936 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (and 15 more)] === [2023-08-27 07:54:36,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 07:54:36,937 INFO L85 PathProgramCache]: Analyzing trace with hash 701766361, now seen corresponding path program 8 times [2023-08-27 07:54:36,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 07:54:36,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921324047] [2023-08-27 07:54:36,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 07:54:36,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 07:54:36,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 07:54:37,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 07:54:37,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 07:54:37,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921324047] [2023-08-27 07:54:37,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921324047] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 07:54:37,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584040872] [2023-08-27 07:54:37,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 07:54:37,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 07:54:37,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 07:54:37,529 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 07:54:37,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-27 07:54:37,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 07:54:37,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 07:54:37,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 07:54:37,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 07:54:38,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:54:38,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:54:38,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 07:54:38,114 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 07:54:38,121 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:54:38,121 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 84 [2023-08-27 07:54:38,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 07:54:38,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 07:54:39,477 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 07:54:39,478 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 379 treesize of output 615 [2023-08-27 07:54:52,747 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 07:55:43,509 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 07:55:51,245 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 07:56:10,543 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 07:56:46,763 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 07:57:24,213 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 07:57:36,374 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 07:57:54,182 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 07:58:05,707 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 07:59:00,560 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 07:59:18,585 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 08:01:14,172 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 08:01:42,512 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 08:02:44,361 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 08:03:13,555 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 08:03:39,533 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 08:04:07,375 WARN L667 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-08-27 08:04:27,744 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-08-27 08:05:42,643 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. Received shutdown request... [2023-08-27 08:06:27,578 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 08:06:27,578 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 08:06:27,623 WARN L266 SmtUtils]: Removed 2 from assertion stack [2023-08-27 08:06:27,626 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (17 of 18 remaining) [2023-08-27 08:06:27,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-27 08:06:27,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-27 08:06:27,829 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 129ms.. [2023-08-27 08:06:27,830 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 18 remaining) [2023-08-27 08:06:27,830 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 18 remaining) [2023-08-27 08:06:27,830 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 18 remaining) [2023-08-27 08:06:27,830 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 18 remaining) [2023-08-27 08:06:27,831 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 18 remaining) [2023-08-27 08:06:27,831 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 18 remaining) [2023-08-27 08:06:27,831 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 18 remaining) [2023-08-27 08:06:27,831 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 18 remaining) [2023-08-27 08:06:27,831 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 18 remaining) [2023-08-27 08:06:27,831 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 18 remaining) [2023-08-27 08:06:27,831 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 18 remaining) [2023-08-27 08:06:27,831 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 18 remaining) [2023-08-27 08:06:27,831 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 18 remaining) [2023-08-27 08:06:27,831 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 18 remaining) [2023-08-27 08:06:27,831 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 18 remaining) [2023-08-27 08:06:27,831 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 18 remaining) [2023-08-27 08:06:27,831 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread3Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 18 remaining) [2023-08-27 08:06:27,832 INFO L445 BasicCegarLoop]: Path program histogram: [20, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:06:27,835 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 08:06:27,835 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 08:06:27,837 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 08:06:27 BasicIcfg [2023-08-27 08:06:27,837 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 08:06:27,837 INFO L158 Benchmark]: Toolchain (without parser) took 856966.97ms. Allocated memory was 400.6MB in the beginning and 7.7GB in the end (delta: 7.3GB). Free memory was 376.7MB in the beginning and 3.2GB in the end (delta: -2.9GB). Peak memory consumption was 4.9GB. Max. memory is 16.0GB. [2023-08-27 08:06:27,837 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 400.6MB. Free memory is still 377.8MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 08:06:27,837 INFO L158 Benchmark]: CACSL2BoogieTranslator took 138.84ms. Allocated memory is still 400.6MB. Free memory was 376.7MB in the beginning and 365.0MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-27 08:06:27,837 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.59ms. Allocated memory is still 400.6MB. Free memory was 365.0MB in the beginning and 363.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 08:06:27,837 INFO L158 Benchmark]: Boogie Preprocessor took 16.30ms. Allocated memory is still 400.6MB. Free memory was 363.4MB in the beginning and 361.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 08:06:27,838 INFO L158 Benchmark]: RCFGBuilder took 391.25ms. Allocated memory is still 400.6MB. Free memory was 361.8MB in the beginning and 339.8MB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-27 08:06:27,838 INFO L158 Benchmark]: TraceAbstraction took 856396.25ms. Allocated memory was 400.6MB in the beginning and 7.7GB in the end (delta: 7.3GB). Free memory was 339.3MB in the beginning and 3.2GB in the end (delta: -2.9GB). Peak memory consumption was 4.9GB. Max. memory is 16.0GB. [2023-08-27 08:06:27,838 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 400.6MB. Free memory is still 377.8MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 138.84ms. Allocated memory is still 400.6MB. Free memory was 376.7MB in the beginning and 365.0MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 20.59ms. Allocated memory is still 400.6MB. Free memory was 365.0MB in the beginning and 363.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 16.30ms. Allocated memory is still 400.6MB. Free memory was 363.4MB in the beginning and 361.9MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 391.25ms. Allocated memory is still 400.6MB. Free memory was 361.8MB in the beginning and 339.8MB in the end (delta: 22.0MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * TraceAbstraction took 856396.25ms. Allocated memory was 400.6MB in the beginning and 7.7GB in the end (delta: 7.3GB). Free memory was 339.3MB in the beginning and 3.2GB in the end (delta: -2.9GB). Peak memory consumption was 4.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.3s, 149 PlacesBefore, 38 PlacesAfterwards, 151 TransitionsBefore, 32 TransitionsAfterwards, 2430 CoEnabledTransitionPairs, 7 FixpointIterations, 77 TrivialSequentialCompositions, 48 ConcurrentSequentialCompositions, 15 TrivialYvCompositions, 6 ConcurrentYvCompositions, 8 ChoiceCompositions, 154 TotalNumberOfCompositions, 2901 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2596, independent: 2570, independent conditional: 0, independent unconditional: 2570, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1355, independent: 1342, independent conditional: 0, independent unconditional: 1342, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2596, independent: 1228, independent conditional: 0, independent unconditional: 1228, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 1355, unknown conditional: 0, unknown unconditional: 1355] , Statistics on independence cache: Total cache size (in pairs): 82, Positive cache size: 80, Positive conditional cache size: 0, Positive unconditional cache size: 80, Negative cache size: 2, Negative conditional cache size: 0, Negative unconditional cache size: 2, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 129ms.. - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 129ms.. - TimeoutResultAtElement [Line: 46]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 129ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 129ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 129ms.. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 129ms.. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 129ms.. - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 129ms.. - TimeoutResultAtElement [Line: 110]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 129ms.. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 129ms.. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 129ms.. - TimeoutResultAtElement [Line: 94]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 27 with TraceHistMax 2,while TraceCheckSpWp was constructing backward predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 5 for 129ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 199 locations, 18 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 856.3s, OverallIterations: 44, TraceHistogramMax: 4, PathProgramHistogramMax: 20, EmptinessCheckTime: 0.0s, AutomataDifference: 97.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.4s, HoareTripleCheckerStatistics: 85 mSolverCounterUnknown, 4221 SdHoareTripleChecker+Valid, 18.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4221 mSDsluCounter, 1642 SdHoareTripleChecker+Invalid, 16.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 369 IncrementalHoareTripleChecker+Unchecked, 1456 mSDsCounter, 358 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 23774 IncrementalHoareTripleChecker+Invalid, 24586 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 358 mSolverCounterUnsat, 186 mSDtfsCounter, 23774 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2017 GetRequests, 1019 SyntacticMatches, 58 SemanticMatches, 940 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 10033 ImplicationChecksByTransitivity, 51.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24783occurred in iteration=43, InterpolantAutomatonStates: 597, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 30.4s InterpolantComputationTime, 1546 NumberOfCodeBlocks, 1537 NumberOfCodeBlocksAsserted, 105 NumberOfCheckSat, 2151 ConstructedInterpolants, 35 QuantifiedInterpolants, 28715 SizeOfPredicates, 282 NumberOfNonLiveVariables, 7852 ConjunctsInSsa, 642 ConjunctsInUnsatCore, 113 InterpolantComputations, 12 PerfectInterpolantSequences, 203/476 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown