/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 01:43:56,319 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 01:43:56,387 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 01:43:56,391 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 01:43:56,391 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 01:43:56,428 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 01:43:56,429 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 01:43:56,429 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 01:43:56,430 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 01:43:56,433 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 01:43:56,434 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 01:43:56,434 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 01:43:56,434 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 01:43:56,435 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 01:43:56,435 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 01:43:56,436 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 01:43:56,436 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 01:43:56,436 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 01:43:56,436 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 01:43:56,437 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 01:43:56,437 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 01:43:56,437 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 01:43:56,437 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 01:43:56,438 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 01:43:56,438 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 01:43:56,438 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 01:43:56,439 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 01:43:56,439 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 01:43:56,439 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 01:43:56,439 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 01:43:56,440 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 01:43:56,440 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 01:43:56,441 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 01:43:56,441 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 01:43:56,441 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 01:43:56,441 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 01:43:56,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 01:43:56,786 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 01:43:56,788 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 01:43:56,789 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 01:43:56,792 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 01:43:56,794 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c [2023-08-27 01:43:57,978 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 01:43:58,233 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 01:43:58,234 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons3.wvr.c [2023-08-27 01:43:58,243 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eb762baa/cadf380722204defad87094b97a7189e/FLAG724d30c4e [2023-08-27 01:43:58,258 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0eb762baa/cadf380722204defad87094b97a7189e [2023-08-27 01:43:58,263 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 01:43:58,266 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 01:43:58,269 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 01:43:58,269 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 01:43:58,271 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 01:43:58,273 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:43:58" (1/1) ... [2023-08-27 01:43:58,273 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229fc180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:43:58, skipping insertion in model container [2023-08-27 01:43:58,274 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:43:58" (1/1) ... [2023-08-27 01:43:58,304 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 01:43:58,492 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 01:43:58,501 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 01:43:58,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 01:43:58,560 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 01:43:58,561 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 01:43:58,567 INFO L206 MainTranslator]: Completed translation [2023-08-27 01:43:58,567 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:43:58 WrapperNode [2023-08-27 01:43:58,568 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 01:43:58,569 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 01:43:58,569 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 01:43:58,569 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 01:43:58,575 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:43:58" (1/1) ... [2023-08-27 01:43:58,582 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:43:58" (1/1) ... [2023-08-27 01:43:58,630 INFO L138 Inliner]: procedures = 26, calls = 74, calls flagged for inlining = 16, calls inlined = 18, statements flattened = 299 [2023-08-27 01:43:58,631 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 01:43:58,631 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 01:43:58,632 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 01:43:58,632 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 01:43:58,639 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:43:58" (1/1) ... [2023-08-27 01:43:58,639 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:43:58" (1/1) ... [2023-08-27 01:43:58,643 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:43:58" (1/1) ... [2023-08-27 01:43:58,643 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:43:58" (1/1) ... [2023-08-27 01:43:58,659 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:43:58" (1/1) ... [2023-08-27 01:43:58,663 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:43:58" (1/1) ... [2023-08-27 01:43:58,665 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:43:58" (1/1) ... [2023-08-27 01:43:58,667 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:43:58" (1/1) ... [2023-08-27 01:43:58,669 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 01:43:58,670 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 01:43:58,670 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 01:43:58,670 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 01:43:58,671 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:43:58" (1/1) ... [2023-08-27 01:43:58,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 01:43:58,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:43:58,704 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-27 01:43:58,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-27 01:43:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 01:43:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 01:43:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 01:43:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 01:43:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 01:43:58,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 01:43:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 01:43:58,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 01:43:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 01:43:58,755 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 01:43:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-27 01:43:58,756 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-27 01:43:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 01:43:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 01:43:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 01:43:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 01:43:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 01:43:58,756 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 01:43:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 01:43:58,759 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 01:43:58,863 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 01:43:58,865 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 01:43:59,186 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 01:43:59,373 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 01:43:59,373 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-08-27 01:43:59,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:43:59 BoogieIcfgContainer [2023-08-27 01:43:59,377 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 01:43:59,379 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 01:43:59,379 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 01:43:59,382 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 01:43:59,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 01:43:58" (1/3) ... [2023-08-27 01:43:59,383 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab2f169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:43:59, skipping insertion in model container [2023-08-27 01:43:59,383 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:43:58" (2/3) ... [2023-08-27 01:43:59,383 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ab2f169 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:43:59, skipping insertion in model container [2023-08-27 01:43:59,384 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:43:59" (3/3) ... [2023-08-27 01:43:59,385 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons3.wvr.c [2023-08-27 01:43:59,400 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 01:43:59,401 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2023-08-27 01:43:59,402 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 01:43:59,509 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-27 01:43:59,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 259 transitions, 550 flow [2023-08-27 01:43:59,670 INFO L124 PetriNetUnfolderBase]: 18/255 cut-off events. [2023-08-27 01:43:59,670 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 01:43:59,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272 conditions, 255 events. 18/255 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 246 event pairs, 0 based on Foata normal form. 0/214 useless extension candidates. Maximal degree in co-relation 220. Up to 3 conditions per place. [2023-08-27 01:43:59,677 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 259 transitions, 550 flow [2023-08-27 01:43:59,686 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 242 transitions, 508 flow [2023-08-27 01:43:59,690 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 01:43:59,703 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 242 transitions, 508 flow [2023-08-27 01:43:59,706 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 242 transitions, 508 flow [2023-08-27 01:43:59,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 242 transitions, 508 flow [2023-08-27 01:43:59,764 INFO L124 PetriNetUnfolderBase]: 18/242 cut-off events. [2023-08-27 01:43:59,765 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 01:43:59,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 242 events. 18/242 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 245 event pairs, 0 based on Foata normal form. 0/202 useless extension candidates. Maximal degree in co-relation 220. Up to 3 conditions per place. [2023-08-27 01:43:59,770 INFO L119 LiptonReduction]: Number of co-enabled transitions 4446 [2023-08-27 01:44:09,170 INFO L134 LiptonReduction]: Checked pairs total: 12809 [2023-08-27 01:44:09,171 INFO L136 LiptonReduction]: Total number of compositions: 246 [2023-08-27 01:44:09,183 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 01:44:09,189 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;@56aeca8c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 01:44:09,189 INFO L358 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2023-08-27 01:44:09,192 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 01:44:09,193 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 01:44:09,193 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 01:44:09,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:09,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 01:44:09,194 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:09,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:09,198 INFO L85 PathProgramCache]: Analyzing trace with hash 35958, now seen corresponding path program 1 times [2023-08-27 01:44:09,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:09,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526018747] [2023-08-27 01:44:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:09,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:09,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:09,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526018747] [2023-08-27 01:44:09,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526018747] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:09,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:44:09,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 01:44:09,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709866407] [2023-08-27 01:44:09,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:09,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:44:09,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:09,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:44:09,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:44:09,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 505 [2023-08-27 01:44:09,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:09,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:09,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 505 [2023-08-27 01:44:09,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:11,671 INFO L124 PetriNetUnfolderBase]: 17873/23716 cut-off events. [2023-08-27 01:44:11,671 INFO L125 PetriNetUnfolderBase]: For 1280/1280 co-relation queries the response was YES. [2023-08-27 01:44:11,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48361 conditions, 23716 events. 17873/23716 cut-off events. For 1280/1280 co-relation queries the response was YES. Maximal size of possible extension queue 1242. Compared 124935 event pairs, 15288 based on Foata normal form. 0/12320 useless extension candidates. Maximal degree in co-relation 44025. Up to 22943 conditions per place. [2023-08-27 01:44:11,861 INFO L140 encePairwiseOnDemand]: 492/505 looper letters, 50 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2023-08-27 01:44:11,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 58 transitions, 250 flow [2023-08-27 01:44:11,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:44:11,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:44:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2023-08-27 01:44:11,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4415841584158416 [2023-08-27 01:44:11,883 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2023-08-27 01:44:11,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2023-08-27 01:44:11,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:11,889 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2023-08-27 01:44:11,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:11,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:11,904 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:11,905 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 140 flow. Second operand 3 states and 669 transitions. [2023-08-27 01:44:11,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 58 transitions, 250 flow [2023-08-27 01:44:11,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 58 transitions, 234 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-27 01:44:11,940 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 160 flow [2023-08-27 01:44:11,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=160, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2023-08-27 01:44:11,945 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -8 predicate places. [2023-08-27 01:44:11,946 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 160 flow [2023-08-27 01:44:11,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:11,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:11,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 01:44:11,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 01:44:11,947 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:11,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:11,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1116091, now seen corresponding path program 1 times [2023-08-27 01:44:11,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:11,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106393636] [2023-08-27 01:44:11,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:11,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:12,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:12,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106393636] [2023-08-27 01:44:12,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106393636] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:44:12,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446935151] [2023-08-27 01:44:12,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:12,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:12,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:44:12,079 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:44:12,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 01:44:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:12,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:44:12,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:44:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:12,200 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:44:12,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446935151] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:12,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:44:12,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-27 01:44:12,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351898180] [2023-08-27 01:44:12,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:12,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:44:12,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:12,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:44:12,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 01:44:12,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 505 [2023-08-27 01:44:12,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 160 flow. Second operand has 4 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:12,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:12,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 505 [2023-08-27 01:44:12,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:14,150 INFO L124 PetriNetUnfolderBase]: 17873/23714 cut-off events. [2023-08-27 01:44:14,150 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2023-08-27 01:44:14,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47378 conditions, 23714 events. 17873/23714 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 1242. Compared 124980 event pairs, 15288 based on Foata normal form. 0/12322 useless extension candidates. Maximal degree in co-relation 47336. Up to 22935 conditions per place. [2023-08-27 01:44:14,297 INFO L140 encePairwiseOnDemand]: 498/505 looper letters, 47 selfloop transitions, 6 changer transitions 0/56 dead transitions. [2023-08-27 01:44:14,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 56 transitions, 258 flow [2023-08-27 01:44:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:44:14,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:44:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 863 transitions. [2023-08-27 01:44:14,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4272277227722772 [2023-08-27 01:44:14,300 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 863 transitions. [2023-08-27 01:44:14,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 863 transitions. [2023-08-27 01:44:14,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:14,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 863 transitions. [2023-08-27 01:44:14,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 215.75) internal successors, (863), 4 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:14,306 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:14,308 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:14,308 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 160 flow. Second operand 4 states and 863 transitions. [2023-08-27 01:44:14,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 56 transitions, 258 flow [2023-08-27 01:44:14,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 56 transitions, 248 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 01:44:14,310 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 154 flow [2023-08-27 01:44:14,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2023-08-27 01:44:14,311 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -9 predicate places. [2023-08-27 01:44:14,311 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 154 flow [2023-08-27 01:44:14,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.75) internal successors, (811), 4 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:14,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:14,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 01:44:14,322 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 01:44:14,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:14,518 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:14,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:14,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1116090, now seen corresponding path program 1 times [2023-08-27 01:44:14,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:14,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120040503] [2023-08-27 01:44:14,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:14,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:14,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:14,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120040503] [2023-08-27 01:44:14,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120040503] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:44:14,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676000295] [2023-08-27 01:44:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:14,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:14,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:44:14,615 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:44:14,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 01:44:14,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:14,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:44:14,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:44:14,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:14,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:44:14,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:14,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676000295] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:44:14,755 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:44:14,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 01:44:14,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552777758] [2023-08-27 01:44:14,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:44:14,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 01:44:14,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:14,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 01:44:14,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 01:44:14,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 505 [2023-08-27 01:44:14,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 154 flow. Second operand has 7 states, 7 states have (on average 203.14285714285714) internal successors, (1422), 7 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:14,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:14,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 505 [2023-08-27 01:44:14,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:16,375 INFO L124 PetriNetUnfolderBase]: 17879/23726 cut-off events. [2023-08-27 01:44:16,375 INFO L125 PetriNetUnfolderBase]: For 187/187 co-relation queries the response was YES. [2023-08-27 01:44:16,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47421 conditions, 23726 events. 17879/23726 cut-off events. For 187/187 co-relation queries the response was YES. Maximal size of possible extension queue 1329. Compared 125246 event pairs, 15288 based on Foata normal form. 0/12335 useless extension candidates. Maximal degree in co-relation 47336. Up to 22944 conditions per place. [2023-08-27 01:44:16,524 INFO L140 encePairwiseOnDemand]: 498/505 looper letters, 48 selfloop transitions, 17 changer transitions 0/68 dead transitions. [2023-08-27 01:44:16,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 68 transitions, 344 flow [2023-08-27 01:44:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:44:16,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:44:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1283 transitions. [2023-08-27 01:44:16,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42343234323432344 [2023-08-27 01:44:16,528 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1283 transitions. [2023-08-27 01:44:16,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1283 transitions. [2023-08-27 01:44:16,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:16,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1283 transitions. [2023-08-27 01:44:16,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 213.83333333333334) internal successors, (1283), 6 states have internal predecessors, (1283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:16,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 505.0) internal successors, (3535), 7 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:16,538 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 505.0) internal successors, (3535), 7 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:16,538 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 154 flow. Second operand 6 states and 1283 transitions. [2023-08-27 01:44:16,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 68 transitions, 344 flow [2023-08-27 01:44:16,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 68 transitions, 330 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 01:44:16,542 INFO L231 Difference]: Finished difference. Result has 63 places, 68 transitions, 270 flow [2023-08-27 01:44:16,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=270, PETRI_PLACES=63, PETRI_TRANSITIONS=68} [2023-08-27 01:44:16,543 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2023-08-27 01:44:16,543 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 68 transitions, 270 flow [2023-08-27 01:44:16,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 203.14285714285714) internal successors, (1422), 7 states have internal predecessors, (1422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:16,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:16,544 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 01:44:16,556 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 01:44:16,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-27 01:44:16,750 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:16,751 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:16,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1108888139, now seen corresponding path program 2 times [2023-08-27 01:44:16,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:16,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539063368] [2023-08-27 01:44:16,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:16,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:16,847 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:16,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:16,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539063368] [2023-08-27 01:44:16,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539063368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:44:16,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092635136] [2023-08-27 01:44:16,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:44:16,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:16,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:44:16,849 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:44:16,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 01:44:16,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:44:16,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:44:16,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 01:44:16,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:44:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 01:44:16,959 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:44:16,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092635136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:16,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:44:16,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 01:44:16,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440104467] [2023-08-27 01:44:16,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:16,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:44:16,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:16,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:44:16,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 01:44:16,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 204 out of 505 [2023-08-27 01:44:16,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 68 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:16,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:16,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 204 of 505 [2023-08-27 01:44:16,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:18,316 INFO L124 PetriNetUnfolderBase]: 17879/23725 cut-off events. [2023-08-27 01:44:18,317 INFO L125 PetriNetUnfolderBase]: For 190/190 co-relation queries the response was YES. [2023-08-27 01:44:18,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47446 conditions, 23725 events. 17879/23725 cut-off events. For 190/190 co-relation queries the response was YES. Maximal size of possible extension queue 1329. Compared 125262 event pairs, 15288 based on Foata normal form. 1/12338 useless extension candidates. Maximal degree in co-relation 47387. Up to 22949 conditions per place. [2023-08-27 01:44:18,433 INFO L140 encePairwiseOnDemand]: 502/505 looper letters, 58 selfloop transitions, 6 changer transitions 0/67 dead transitions. [2023-08-27 01:44:18,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 67 transitions, 388 flow [2023-08-27 01:44:18,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:44:18,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:44:18,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 661 transitions. [2023-08-27 01:44:18,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363036303630363 [2023-08-27 01:44:18,436 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 661 transitions. [2023-08-27 01:44:18,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 661 transitions. [2023-08-27 01:44:18,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:18,437 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 661 transitions. [2023-08-27 01:44:18,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:18,441 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:18,442 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:18,442 INFO L175 Difference]: Start difference. First operand has 63 places, 68 transitions, 270 flow. Second operand 3 states and 661 transitions. [2023-08-27 01:44:18,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 67 transitions, 388 flow [2023-08-27 01:44:18,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 67 transitions, 362 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 01:44:18,445 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 246 flow [2023-08-27 01:44:18,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=63, PETRI_TRANSITIONS=67} [2023-08-27 01:44:18,445 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, -3 predicate places. [2023-08-27 01:44:18,446 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 246 flow [2023-08-27 01:44:18,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:18,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:18,446 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-27 01:44:18,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 01:44:18,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:18,651 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:18,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:18,652 INFO L85 PathProgramCache]: Analyzing trace with hash 759103170, now seen corresponding path program 1 times [2023-08-27 01:44:18,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:18,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361236318] [2023-08-27 01:44:18,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:18,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:18,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:18,776 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:18,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:18,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361236318] [2023-08-27 01:44:18,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361236318] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:44:18,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817772784] [2023-08-27 01:44:18,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:18,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:18,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:44:18,785 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:44:18,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 01:44:18,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:18,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 01:44:18,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:44:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:18,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:44:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:18,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817772784] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:44:18,964 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:44:18,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 01:44:18,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109942544] [2023-08-27 01:44:18,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:44:18,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 01:44:18,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:18,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 01:44:18,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-27 01:44:18,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 505 [2023-08-27 01:44:18,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 246 flow. Second operand has 13 states, 13 states have (on average 203.15384615384616) internal successors, (2641), 13 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:18,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:18,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 505 [2023-08-27 01:44:18,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:20,519 INFO L124 PetriNetUnfolderBase]: 17891/23749 cut-off events. [2023-08-27 01:44:20,519 INFO L125 PetriNetUnfolderBase]: For 224/224 co-relation queries the response was YES. [2023-08-27 01:44:20,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47535 conditions, 23749 events. 17891/23749 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 1329. Compared 125473 event pairs, 15288 based on Foata normal form. 6/12367 useless extension candidates. Maximal degree in co-relation 47431. Up to 22949 conditions per place. [2023-08-27 01:44:20,668 INFO L140 encePairwiseOnDemand]: 499/505 looper letters, 47 selfloop transitions, 41 changer transitions 0/91 dead transitions. [2023-08-27 01:44:20,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 91 transitions, 584 flow [2023-08-27 01:44:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 01:44:20,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 01:44:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2518 transitions. [2023-08-27 01:44:20,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155115511551155 [2023-08-27 01:44:20,676 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2518 transitions. [2023-08-27 01:44:20,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2518 transitions. [2023-08-27 01:44:20,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:20,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2518 transitions. [2023-08-27 01:44:20,682 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 209.83333333333334) internal successors, (2518), 12 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:20,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 505.0) internal successors, (6565), 13 states have internal predecessors, (6565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:20,692 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 505.0) internal successors, (6565), 13 states have internal predecessors, (6565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:20,693 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 246 flow. Second operand 12 states and 2518 transitions. [2023-08-27 01:44:20,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 91 transitions, 584 flow [2023-08-27 01:44:20,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 91 transitions, 560 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 01:44:20,696 INFO L231 Difference]: Finished difference. Result has 78 places, 91 transitions, 520 flow [2023-08-27 01:44:20,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=520, PETRI_PLACES=78, PETRI_TRANSITIONS=91} [2023-08-27 01:44:20,697 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 12 predicate places. [2023-08-27 01:44:20,697 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 91 transitions, 520 flow [2023-08-27 01:44:20,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 203.15384615384616) internal successors, (2641), 13 states have internal predecessors, (2641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:20,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:20,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:44:20,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 01:44:20,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:20,903 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:20,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:20,904 INFO L85 PathProgramCache]: Analyzing trace with hash 772467706, now seen corresponding path program 1 times [2023-08-27 01:44:20,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:20,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716612592] [2023-08-27 01:44:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:20,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:20,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:20,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:20,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716612592] [2023-08-27 01:44:20,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716612592] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:20,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:44:20,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:44:20,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251100390] [2023-08-27 01:44:20,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:20,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:44:20,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:20,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:44:20,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:44:20,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 505 [2023-08-27 01:44:20,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 91 transitions, 520 flow. Second operand has 3 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:20,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:20,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 505 [2023-08-27 01:44:20,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:22,195 INFO L124 PetriNetUnfolderBase]: 14655/19697 cut-off events. [2023-08-27 01:44:22,195 INFO L125 PetriNetUnfolderBase]: For 222/222 co-relation queries the response was YES. [2023-08-27 01:44:22,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39840 conditions, 19697 events. 14655/19697 cut-off events. For 222/222 co-relation queries the response was YES. Maximal size of possible extension queue 900. Compared 105548 event pairs, 6921 based on Foata normal form. 0/10755 useless extension candidates. Maximal degree in co-relation 39760. Up to 10710 conditions per place. [2023-08-27 01:44:22,288 INFO L140 encePairwiseOnDemand]: 502/505 looper letters, 113 selfloop transitions, 2 changer transitions 0/117 dead transitions. [2023-08-27 01:44:22,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 805 flow [2023-08-27 01:44:22,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:44:22,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:44:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 712 transitions. [2023-08-27 01:44:22,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46996699669966996 [2023-08-27 01:44:22,290 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 712 transitions. [2023-08-27 01:44:22,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 712 transitions. [2023-08-27 01:44:22,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:22,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 712 transitions. [2023-08-27 01:44:22,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 237.33333333333334) internal successors, (712), 3 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:22,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:22,295 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:22,295 INFO L175 Difference]: Start difference. First operand has 78 places, 91 transitions, 520 flow. Second operand 3 states and 712 transitions. [2023-08-27 01:44:22,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 805 flow [2023-08-27 01:44:22,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 117 transitions, 681 flow, removed 39 selfloop flow, removed 5 redundant places. [2023-08-27 01:44:22,300 INFO L231 Difference]: Finished difference. Result has 74 places, 90 transitions, 398 flow [2023-08-27 01:44:22,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=398, PETRI_PLACES=74, PETRI_TRANSITIONS=90} [2023-08-27 01:44:22,300 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 8 predicate places. [2023-08-27 01:44:22,300 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 90 transitions, 398 flow [2023-08-27 01:44:22,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:22,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:22,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:44:22,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 01:44:22,301 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:22,302 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:22,302 INFO L85 PathProgramCache]: Analyzing trace with hash 772467576, now seen corresponding path program 1 times [2023-08-27 01:44:22,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:22,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659854568] [2023-08-27 01:44:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:22,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:22,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:22,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:22,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659854568] [2023-08-27 01:44:22,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659854568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:22,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:44:22,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:44:22,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051265774] [2023-08-27 01:44:22,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:22,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:44:22,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:22,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:44:22,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 01:44:22,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 505 [2023-08-27 01:44:22,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 90 transitions, 398 flow. Second operand has 4 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:22,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:22,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 505 [2023-08-27 01:44:22,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:23,570 INFO L124 PetriNetUnfolderBase]: 17496/23436 cut-off events. [2023-08-27 01:44:23,570 INFO L125 PetriNetUnfolderBase]: For 2900/2900 co-relation queries the response was YES. [2023-08-27 01:44:23,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49357 conditions, 23436 events. 17496/23436 cut-off events. For 2900/2900 co-relation queries the response was YES. Maximal size of possible extension queue 1185. Compared 126995 event pairs, 14965 based on Foata normal form. 400/15754 useless extension candidates. Maximal degree in co-relation 49260. Up to 20091 conditions per place. [2023-08-27 01:44:23,800 INFO L140 encePairwiseOnDemand]: 497/505 looper letters, 136 selfloop transitions, 3 changer transitions 0/142 dead transitions. [2023-08-27 01:44:23,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 142 transitions, 898 flow [2023-08-27 01:44:23,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:44:23,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:44:23,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 850 transitions. [2023-08-27 01:44:23,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4207920792079208 [2023-08-27 01:44:23,803 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 850 transitions. [2023-08-27 01:44:23,803 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 850 transitions. [2023-08-27 01:44:23,803 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:23,803 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 850 transitions. [2023-08-27 01:44:23,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 212.5) internal successors, (850), 4 states have internal predecessors, (850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:23,807 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:23,808 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:23,808 INFO L175 Difference]: Start difference. First operand has 74 places, 90 transitions, 398 flow. Second operand 4 states and 850 transitions. [2023-08-27 01:44:23,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 142 transitions, 898 flow [2023-08-27 01:44:23,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 142 transitions, 892 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 01:44:23,818 INFO L231 Difference]: Finished difference. Result has 76 places, 90 transitions, 411 flow [2023-08-27 01:44:23,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=411, PETRI_PLACES=76, PETRI_TRANSITIONS=90} [2023-08-27 01:44:23,818 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 10 predicate places. [2023-08-27 01:44:23,820 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 90 transitions, 411 flow [2023-08-27 01:44:23,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:23,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:23,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:44:23,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 01:44:23,821 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:23,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:23,822 INFO L85 PathProgramCache]: Analyzing trace with hash 298693459, now seen corresponding path program 1 times [2023-08-27 01:44:23,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:23,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050426051] [2023-08-27 01:44:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:23,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:23,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:23,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050426051] [2023-08-27 01:44:23,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050426051] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:44:23,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654986017] [2023-08-27 01:44:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:23,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:23,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:44:23,949 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:44:23,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 01:44:24,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:24,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:44:24,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:44:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:44:24,068 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:44:24,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654986017] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:24,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:44:24,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 01:44:24,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402621990] [2023-08-27 01:44:24,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:24,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:44:24,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:24,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:44:24,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 01:44:24,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 215 out of 505 [2023-08-27 01:44:24,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 90 transitions, 411 flow. Second operand has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:24,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:24,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 215 of 505 [2023-08-27 01:44:24,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:25,040 INFO L124 PetriNetUnfolderBase]: 14042/18844 cut-off events. [2023-08-27 01:44:25,040 INFO L125 PetriNetUnfolderBase]: For 1333/1333 co-relation queries the response was YES. [2023-08-27 01:44:25,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39511 conditions, 18844 events. 14042/18844 cut-off events. For 1333/1333 co-relation queries the response was YES. Maximal size of possible extension queue 1014. Compared 100416 event pairs, 11837 based on Foata normal form. 0/11331 useless extension candidates. Maximal degree in co-relation 39413. Up to 18252 conditions per place. [2023-08-27 01:44:25,151 INFO L140 encePairwiseOnDemand]: 502/505 looper letters, 84 selfloop transitions, 1 changer transitions 0/88 dead transitions. [2023-08-27 01:44:25,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 88 transitions, 573 flow [2023-08-27 01:44:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:44:25,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:44:25,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 692 transitions. [2023-08-27 01:44:25,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45676567656765676 [2023-08-27 01:44:25,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 692 transitions. [2023-08-27 01:44:25,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 692 transitions. [2023-08-27 01:44:25,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:25,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 692 transitions. [2023-08-27 01:44:25,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:25,158 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:25,159 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:25,159 INFO L175 Difference]: Start difference. First operand has 76 places, 90 transitions, 411 flow. Second operand 3 states and 692 transitions. [2023-08-27 01:44:25,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 88 transitions, 573 flow [2023-08-27 01:44:25,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 88 transitions, 567 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-27 01:44:25,164 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 399 flow [2023-08-27 01:44:25,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=397, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=399, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2023-08-27 01:44:25,165 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2023-08-27 01:44:25,165 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 399 flow [2023-08-27 01:44:25,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:25,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:25,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:44:25,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 01:44:25,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:25,370 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:25,371 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:25,373 INFO L85 PathProgramCache]: Analyzing trace with hash 298693588, now seen corresponding path program 1 times [2023-08-27 01:44:25,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:25,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875624505] [2023-08-27 01:44:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:25,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:44:25,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:25,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875624505] [2023-08-27 01:44:25,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875624505] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:25,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:44:25,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:44:25,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329239715] [2023-08-27 01:44:25,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:25,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:44:25,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:25,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:44:25,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 01:44:25,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 505 [2023-08-27 01:44:25,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 399 flow. Second operand has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:25,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:25,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 505 [2023-08-27 01:44:25,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:26,214 INFO L124 PetriNetUnfolderBase]: 11680/15901 cut-off events. [2023-08-27 01:44:26,214 INFO L125 PetriNetUnfolderBase]: For 616/616 co-relation queries the response was YES. [2023-08-27 01:44:26,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33216 conditions, 15901 events. 11680/15901 cut-off events. For 616/616 co-relation queries the response was YES. Maximal size of possible extension queue 662. Compared 83246 event pairs, 5626 based on Foata normal form. 0/10379 useless extension candidates. Maximal degree in co-relation 33196. Up to 8335 conditions per place. [2023-08-27 01:44:26,288 INFO L140 encePairwiseOnDemand]: 500/505 looper letters, 108 selfloop transitions, 3 changer transitions 0/112 dead transitions. [2023-08-27 01:44:26,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 112 transitions, 672 flow [2023-08-27 01:44:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:44:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:44:26,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 902 transitions. [2023-08-27 01:44:26,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44653465346534654 [2023-08-27 01:44:26,291 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 902 transitions. [2023-08-27 01:44:26,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 902 transitions. [2023-08-27 01:44:26,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:26,292 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 902 transitions. [2023-08-27 01:44:26,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 225.5) internal successors, (902), 4 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:26,295 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:26,296 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:26,296 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 399 flow. Second operand 4 states and 902 transitions. [2023-08-27 01:44:26,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 112 transitions, 672 flow [2023-08-27 01:44:26,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 112 transitions, 671 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:44:26,302 INFO L231 Difference]: Finished difference. Result has 75 places, 86 transitions, 398 flow [2023-08-27 01:44:26,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=398, PETRI_PLACES=75, PETRI_TRANSITIONS=86} [2023-08-27 01:44:26,302 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2023-08-27 01:44:26,302 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 86 transitions, 398 flow [2023-08-27 01:44:26,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:26,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:26,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:44:26,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 01:44:26,303 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:26,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:26,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1310824891, now seen corresponding path program 1 times [2023-08-27 01:44:26,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:26,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074567795] [2023-08-27 01:44:26,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:26,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:26,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:26,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:26,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074567795] [2023-08-27 01:44:26,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074567795] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:26,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:44:26,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 01:44:26,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388355184] [2023-08-27 01:44:26,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:26,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:44:26,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:26,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:44:26,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:44:26,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 214 out of 505 [2023-08-27 01:44:26,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 86 transitions, 398 flow. Second operand has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:26,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:26,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 214 of 505 [2023-08-27 01:44:26,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:27,078 INFO L124 PetriNetUnfolderBase]: 8998/12122 cut-off events. [2023-08-27 01:44:27,078 INFO L125 PetriNetUnfolderBase]: For 2293/2293 co-relation queries the response was YES. [2023-08-27 01:44:27,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26755 conditions, 12122 events. 8998/12122 cut-off events. For 2293/2293 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 59973 event pairs, 2723 based on Foata normal form. 0/9478 useless extension candidates. Maximal degree in co-relation 26734. Up to 8695 conditions per place. [2023-08-27 01:44:27,135 INFO L140 encePairwiseOnDemand]: 497/505 looper letters, 106 selfloop transitions, 4 changer transitions 0/113 dead transitions. [2023-08-27 01:44:27,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 113 transitions, 684 flow [2023-08-27 01:44:27,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:44:27,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:44:27,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 716 transitions. [2023-08-27 01:44:27,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4726072607260726 [2023-08-27 01:44:27,137 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 716 transitions. [2023-08-27 01:44:27,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 716 transitions. [2023-08-27 01:44:27,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:27,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 716 transitions. [2023-08-27 01:44:27,139 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 238.66666666666666) internal successors, (716), 3 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:27,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:27,141 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:27,141 INFO L175 Difference]: Start difference. First operand has 75 places, 86 transitions, 398 flow. Second operand 3 states and 716 transitions. [2023-08-27 01:44:27,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 113 transitions, 684 flow [2023-08-27 01:44:27,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 113 transitions, 676 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 01:44:27,150 INFO L231 Difference]: Finished difference. Result has 75 places, 89 transitions, 424 flow [2023-08-27 01:44:27,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=424, PETRI_PLACES=75, PETRI_TRANSITIONS=89} [2023-08-27 01:44:27,151 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 9 predicate places. [2023-08-27 01:44:27,151 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 89 transitions, 424 flow [2023-08-27 01:44:27,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:27,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:27,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:44:27,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 01:44:27,152 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:27,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:27,152 INFO L85 PathProgramCache]: Analyzing trace with hash -488406547, now seen corresponding path program 1 times [2023-08-27 01:44:27,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:27,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162171622] [2023-08-27 01:44:27,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:27,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:27,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:44:27,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:27,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162171622] [2023-08-27 01:44:27,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162171622] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:27,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:44:27,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-27 01:44:27,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713452042] [2023-08-27 01:44:27,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:27,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:44:27,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:27,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:44:27,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 01:44:27,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 505 [2023-08-27 01:44:27,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 89 transitions, 424 flow. Second operand has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:27,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:27,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 505 [2023-08-27 01:44:27,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:28,110 INFO L124 PetriNetUnfolderBase]: 10380/14191 cut-off events. [2023-08-27 01:44:28,110 INFO L125 PetriNetUnfolderBase]: For 1641/1641 co-relation queries the response was YES. [2023-08-27 01:44:28,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32150 conditions, 14191 events. 10380/14191 cut-off events. For 1641/1641 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 73809 event pairs, 8056 based on Foata normal form. 184/10839 useless extension candidates. Maximal degree in co-relation 32128. Up to 11806 conditions per place. [2023-08-27 01:44:28,182 INFO L140 encePairwiseOnDemand]: 496/505 looper letters, 98 selfloop transitions, 13 changer transitions 0/114 dead transitions. [2023-08-27 01:44:28,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 114 transitions, 708 flow [2023-08-27 01:44:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:44:28,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:44:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 840 transitions. [2023-08-27 01:44:28,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4158415841584158 [2023-08-27 01:44:28,186 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 840 transitions. [2023-08-27 01:44:28,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 840 transitions. [2023-08-27 01:44:28,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:28,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 840 transitions. [2023-08-27 01:44:28,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 210.0) internal successors, (840), 4 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:28,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:28,191 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 505.0) internal successors, (2525), 5 states have internal predecessors, (2525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:28,191 INFO L175 Difference]: Start difference. First operand has 75 places, 89 transitions, 424 flow. Second operand 4 states and 840 transitions. [2023-08-27 01:44:28,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 114 transitions, 708 flow [2023-08-27 01:44:28,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 114 transitions, 704 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:44:28,200 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 459 flow [2023-08-27 01:44:28,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=459, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2023-08-27 01:44:28,201 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 12 predicate places. [2023-08-27 01:44:28,201 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 459 flow [2023-08-27 01:44:28,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 193.5) internal successors, (774), 4 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:28,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:28,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:44:28,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 01:44:28,202 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread4Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:28,202 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:28,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1980782974, now seen corresponding path program 1 times [2023-08-27 01:44:28,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:28,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104133637] [2023-08-27 01:44:28,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:28,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:28,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:28,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104133637] [2023-08-27 01:44:28,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104133637] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:28,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:44:28,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:44:28,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976081711] [2023-08-27 01:44:28,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:28,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:44:28,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:28,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:44:28,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:44:28,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 505 [2023-08-27 01:44:28,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 459 flow. Second operand has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:28,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:28,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 505 [2023-08-27 01:44:28,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:29,066 INFO L124 PetriNetUnfolderBase]: 9986/13819 cut-off events. [2023-08-27 01:44:29,066 INFO L125 PetriNetUnfolderBase]: For 1956/1956 co-relation queries the response was YES. [2023-08-27 01:44:29,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32524 conditions, 13819 events. 9986/13819 cut-off events. For 1956/1956 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 67312 event pairs, 8334 based on Foata normal form. 0/10957 useless extension candidates. Maximal degree in co-relation 32501. Up to 13520 conditions per place. [2023-08-27 01:44:29,115 INFO L140 encePairwiseOnDemand]: 503/505 looper letters, 76 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2023-08-27 01:44:29,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 88 transitions, 631 flow [2023-08-27 01:44:29,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:44:29,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:44:29,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 681 transitions. [2023-08-27 01:44:29,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4495049504950495 [2023-08-27 01:44:29,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 681 transitions. [2023-08-27 01:44:29,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 681 transitions. [2023-08-27 01:44:29,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:29,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 681 transitions. [2023-08-27 01:44:29,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:29,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:29,120 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:29,120 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 459 flow. Second operand 3 states and 681 transitions. [2023-08-27 01:44:29,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 88 transitions, 631 flow [2023-08-27 01:44:29,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 88 transitions, 603 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 01:44:29,132 INFO L231 Difference]: Finished difference. Result has 77 places, 88 transitions, 451 flow [2023-08-27 01:44:29,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=451, PETRI_PLACES=77, PETRI_TRANSITIONS=88} [2023-08-27 01:44:29,132 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 11 predicate places. [2023-08-27 01:44:29,132 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 88 transitions, 451 flow [2023-08-27 01:44:29,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 215.66666666666666) internal successors, (647), 3 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:29,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:29,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:44:29,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-27 01:44:29,133 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:29,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:29,133 INFO L85 PathProgramCache]: Analyzing trace with hash 687160198, now seen corresponding path program 1 times [2023-08-27 01:44:29,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:29,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782146645] [2023-08-27 01:44:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:29,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:29,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 01:44:29,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:29,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782146645] [2023-08-27 01:44:29,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782146645] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:29,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:44:29,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:44:29,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041370112] [2023-08-27 01:44:29,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:29,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:44:29,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:29,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:44:29,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:44:29,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 505 [2023-08-27 01:44:29,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 88 transitions, 451 flow. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:29,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:29,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 505 [2023-08-27 01:44:29,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:29,996 INFO L124 PetriNetUnfolderBase]: 8774/12293 cut-off events. [2023-08-27 01:44:29,997 INFO L125 PetriNetUnfolderBase]: For 1718/1718 co-relation queries the response was YES. [2023-08-27 01:44:30,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28792 conditions, 12293 events. 8774/12293 cut-off events. For 1718/1718 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 61929 event pairs, 3868 based on Foata normal form. 144/9889 useless extension candidates. Maximal degree in co-relation 28770. Up to 9323 conditions per place. [2023-08-27 01:44:30,054 INFO L140 encePairwiseOnDemand]: 502/505 looper letters, 107 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-27 01:44:30,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 111 transitions, 724 flow [2023-08-27 01:44:30,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:44:30,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:44:30,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 700 transitions. [2023-08-27 01:44:30,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46204620462046203 [2023-08-27 01:44:30,056 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 700 transitions. [2023-08-27 01:44:30,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 700 transitions. [2023-08-27 01:44:30,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:30,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 700 transitions. [2023-08-27 01:44:30,057 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 233.33333333333334) internal successors, (700), 3 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:30,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:30,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:30,059 INFO L175 Difference]: Start difference. First operand has 77 places, 88 transitions, 451 flow. Second operand 3 states and 700 transitions. [2023-08-27 01:44:30,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 111 transitions, 724 flow [2023-08-27 01:44:30,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 111 transitions, 713 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:44:30,071 INFO L231 Difference]: Finished difference. Result has 79 places, 89 transitions, 454 flow [2023-08-27 01:44:30,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=454, PETRI_PLACES=79, PETRI_TRANSITIONS=89} [2023-08-27 01:44:30,072 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 13 predicate places. [2023-08-27 01:44:30,072 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 89 transitions, 454 flow [2023-08-27 01:44:30,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:30,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:30,073 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-27 01:44:30,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-27 01:44:30,073 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:30,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:30,073 INFO L85 PathProgramCache]: Analyzing trace with hash -405591966, now seen corresponding path program 2 times [2023-08-27 01:44:30,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:30,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11924696] [2023-08-27 01:44:30,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:30,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:30,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:30,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:30,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11924696] [2023-08-27 01:44:30,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11924696] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:44:30,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123740816] [2023-08-27 01:44:30,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:44:30,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:30,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:44:30,269 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:44:30,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 01:44:30,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:44:30,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:44:30,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 01:44:30,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:44:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-27 01:44:30,417 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:44:30,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123740816] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:30,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:44:30,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [12] total 14 [2023-08-27 01:44:30,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319287650] [2023-08-27 01:44:30,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:30,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:44:30,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:30,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:44:30,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2023-08-27 01:44:30,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 505 [2023-08-27 01:44:30,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 89 transitions, 454 flow. Second operand has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:30,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:30,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 505 [2023-08-27 01:44:30,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:31,073 INFO L124 PetriNetUnfolderBase]: 7552/10635 cut-off events. [2023-08-27 01:44:31,073 INFO L125 PetriNetUnfolderBase]: For 3240/3240 co-relation queries the response was YES. [2023-08-27 01:44:31,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25751 conditions, 10635 events. 7552/10635 cut-off events. For 3240/3240 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 52517 event pairs, 6308 based on Foata normal form. 2/8773 useless extension candidates. Maximal degree in co-relation 25727. Up to 10453 conditions per place. [2023-08-27 01:44:31,119 INFO L140 encePairwiseOnDemand]: 501/505 looper letters, 83 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2023-08-27 01:44:31,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 592 flow [2023-08-27 01:44:31,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:44:31,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:44:31,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 646 transitions. [2023-08-27 01:44:31,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4264026402640264 [2023-08-27 01:44:31,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 646 transitions. [2023-08-27 01:44:31,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 646 transitions. [2023-08-27 01:44:31,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:31,121 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 646 transitions. [2023-08-27 01:44:31,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 215.33333333333334) internal successors, (646), 3 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:31,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:31,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:31,123 INFO L175 Difference]: Start difference. First operand has 79 places, 89 transitions, 454 flow. Second operand 3 states and 646 transitions. [2023-08-27 01:44:31,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 592 flow [2023-08-27 01:44:31,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 86 transitions, 512 flow, removed 5 selfloop flow, removed 11 redundant places. [2023-08-27 01:44:31,129 INFO L231 Difference]: Finished difference. Result has 67 places, 86 transitions, 346 flow [2023-08-27 01:44:31,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=346, PETRI_PLACES=67, PETRI_TRANSITIONS=86} [2023-08-27 01:44:31,130 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 1 predicate places. [2023-08-27 01:44:31,130 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 86 transitions, 346 flow [2023-08-27 01:44:31,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:31,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:31,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:44:31,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 01:44:31,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:31,336 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:31,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:31,336 INFO L85 PathProgramCache]: Analyzing trace with hash -238288802, now seen corresponding path program 1 times [2023-08-27 01:44:31,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:31,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037800660] [2023-08-27 01:44:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:31,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:31,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:44:31,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:31,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037800660] [2023-08-27 01:44:31,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037800660] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:44:31,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874635477] [2023-08-27 01:44:31,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:31,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:31,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:44:31,801 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:44:31,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 01:44:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:31,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 01:44:31,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:44:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 01:44:32,032 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:44:32,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874635477] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:32,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:44:32,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2023-08-27 01:44:32,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218609170] [2023-08-27 01:44:32,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:32,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:44:32,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:32,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:44:32,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-08-27 01:44:32,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 505 [2023-08-27 01:44:32,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 86 transitions, 346 flow. Second operand has 5 states, 5 states have (on average 199.6) internal successors, (998), 5 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:32,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:32,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 505 [2023-08-27 01:44:32,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:32,985 INFO L124 PetriNetUnfolderBase]: 10880/15327 cut-off events. [2023-08-27 01:44:32,986 INFO L125 PetriNetUnfolderBase]: For 2282/2282 co-relation queries the response was YES. [2023-08-27 01:44:33,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35566 conditions, 15327 events. 10880/15327 cut-off events. For 2282/2282 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 81489 event pairs, 3314 based on Foata normal form. 0/12849 useless extension candidates. Maximal degree in co-relation 35551. Up to 7789 conditions per place. [2023-08-27 01:44:33,044 INFO L140 encePairwiseOnDemand]: 497/505 looper letters, 151 selfloop transitions, 7 changer transitions 0/160 dead transitions. [2023-08-27 01:44:33,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 160 transitions, 854 flow [2023-08-27 01:44:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:44:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:44:33,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1102 transitions. [2023-08-27 01:44:33,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43643564356435643 [2023-08-27 01:44:33,047 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1102 transitions. [2023-08-27 01:44:33,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1102 transitions. [2023-08-27 01:44:33,047 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:33,047 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1102 transitions. [2023-08-27 01:44:33,048 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 220.4) internal successors, (1102), 5 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:33,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 505.0) internal successors, (3030), 6 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:33,051 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 505.0) internal successors, (3030), 6 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:33,051 INFO L175 Difference]: Start difference. First operand has 67 places, 86 transitions, 346 flow. Second operand 5 states and 1102 transitions. [2023-08-27 01:44:33,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 160 transitions, 854 flow [2023-08-27 01:44:33,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 160 transitions, 853 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:44:33,057 INFO L231 Difference]: Finished difference. Result has 72 places, 91 transitions, 392 flow [2023-08-27 01:44:33,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=345, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=72, PETRI_TRANSITIONS=91} [2023-08-27 01:44:33,058 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 6 predicate places. [2023-08-27 01:44:33,058 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 91 transitions, 392 flow [2023-08-27 01:44:33,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 199.6) internal successors, (998), 5 states have internal predecessors, (998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:33,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:33,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:44:33,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 01:44:33,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:33,267 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:33,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:33,267 INFO L85 PathProgramCache]: Analyzing trace with hash -238288801, now seen corresponding path program 1 times [2023-08-27 01:44:33,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:33,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504532006] [2023-08-27 01:44:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:33,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:33,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 01:44:33,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:33,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504532006] [2023-08-27 01:44:33,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504532006] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:33,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:44:33,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 01:44:33,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28088264] [2023-08-27 01:44:33,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:33,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:44:33,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:33,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:44:33,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:44:33,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 505 [2023-08-27 01:44:33,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 91 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:33,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:33,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 505 [2023-08-27 01:44:33,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:34,156 INFO L124 PetriNetUnfolderBase]: 11042/15649 cut-off events. [2023-08-27 01:44:34,157 INFO L125 PetriNetUnfolderBase]: For 5301/5301 co-relation queries the response was YES. [2023-08-27 01:44:34,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38311 conditions, 15649 events. 11042/15649 cut-off events. For 5301/5301 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 84914 event pairs, 5480 based on Foata normal form. 0/13535 useless extension candidates. Maximal degree in co-relation 38293. Up to 9131 conditions per place. [2023-08-27 01:44:34,244 INFO L140 encePairwiseOnDemand]: 502/505 looper letters, 114 selfloop transitions, 2 changer transitions 0/118 dead transitions. [2023-08-27 01:44:34,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 118 transitions, 702 flow [2023-08-27 01:44:34,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:44:34,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:44:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2023-08-27 01:44:34,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745874587458746 [2023-08-27 01:44:34,246 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2023-08-27 01:44:34,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2023-08-27 01:44:34,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:34,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2023-08-27 01:44:34,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:34,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:34,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 505.0) internal successors, (2020), 4 states have internal predecessors, (2020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:34,250 INFO L175 Difference]: Start difference. First operand has 72 places, 91 transitions, 392 flow. Second operand 3 states and 719 transitions. [2023-08-27 01:44:34,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 118 transitions, 702 flow [2023-08-27 01:44:34,257 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 118 transitions, 700 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:44:34,259 INFO L231 Difference]: Finished difference. Result has 74 places, 91 transitions, 394 flow [2023-08-27 01:44:34,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=394, PETRI_PLACES=74, PETRI_TRANSITIONS=91} [2023-08-27 01:44:34,259 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 8 predicate places. [2023-08-27 01:44:34,259 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 91 transitions, 394 flow [2023-08-27 01:44:34,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:34,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:34,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:44:34,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-27 01:44:34,260 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:34,260 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:34,260 INFO L85 PathProgramCache]: Analyzing trace with hash -238288945, now seen corresponding path program 1 times [2023-08-27 01:44:34,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:34,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73993073] [2023-08-27 01:44:34,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:34,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:34,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:44:34,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:34,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73993073] [2023-08-27 01:44:34,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73993073] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:44:34,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839292302] [2023-08-27 01:44:34,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:34,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:34,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:44:34,627 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:44:34,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 01:44:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:34,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 01:44:34,770 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:44:34,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:44:34,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:44:34,859 INFO L322 Elim1Store]: treesize reduction 95, result has 34.0 percent of original size [2023-08-27 01:44:34,860 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 18 treesize of output 54 [2023-08-27 01:44:34,925 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:44:34,964 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 01:44:34,965 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 11 treesize of output 11 [2023-08-27 01:44:34,998 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:44:35,025 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:44:35,060 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:44:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:35,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:44:35,497 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:44:35,497 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 66 treesize of output 54 [2023-08-27 01:44:35,523 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 01:44:35,524 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 5036 treesize of output 4783 [2023-08-27 01:44:35,560 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:44:35,561 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 210 treesize of output 198 [2023-08-27 01:44:35,571 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:44:35,572 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 174 [2023-08-27 01:44:35,586 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 01:44:35,587 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 197 treesize of output 149 [2023-08-27 01:44:35,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:44:35,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839292302] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:44:35,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:44:35,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 8, 8] total 21 [2023-08-27 01:44:35,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108338710] [2023-08-27 01:44:35,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:44:35,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 01:44:35,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:35,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 01:44:35,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=383, Unknown=13, NotChecked=0, Total=506 [2023-08-27 01:44:35,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 505 [2023-08-27 01:44:35,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 91 transitions, 394 flow. Second operand has 23 states, 23 states have (on average 156.69565217391303) internal successors, (3604), 23 states have internal predecessors, (3604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:35,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:35,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 505 [2023-08-27 01:44:35,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:39,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:44:43,273 INFO L124 PetriNetUnfolderBase]: 36672/51413 cut-off events. [2023-08-27 01:44:43,274 INFO L125 PetriNetUnfolderBase]: For 19940/19940 co-relation queries the response was YES. [2023-08-27 01:44:43,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129774 conditions, 51413 events. 36672/51413 cut-off events. For 19940/19940 co-relation queries the response was YES. Maximal size of possible extension queue 1554. Compared 320477 event pairs, 7087 based on Foata normal form. 752/44729 useless extension candidates. Maximal degree in co-relation 129754. Up to 7981 conditions per place. [2023-08-27 01:44:43,547 INFO L140 encePairwiseOnDemand]: 490/505 looper letters, 441 selfloop transitions, 83 changer transitions 0/526 dead transitions. [2023-08-27 01:44:43,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 526 transitions, 2873 flow [2023-08-27 01:44:43,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 01:44:43,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 01:44:43,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 4948 transitions. [2023-08-27 01:44:43,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33786275179242065 [2023-08-27 01:44:43,555 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 4948 transitions. [2023-08-27 01:44:43,555 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 4948 transitions. [2023-08-27 01:44:43,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:43,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 4948 transitions. [2023-08-27 01:44:43,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 170.6206896551724) internal successors, (4948), 29 states have internal predecessors, (4948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:43,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 505.0) internal successors, (15150), 30 states have internal predecessors, (15150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:43,581 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 505.0) internal successors, (15150), 30 states have internal predecessors, (15150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:43,582 INFO L175 Difference]: Start difference. First operand has 74 places, 91 transitions, 394 flow. Second operand 29 states and 4948 transitions. [2023-08-27 01:44:43,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 526 transitions, 2873 flow [2023-08-27 01:44:43,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 526 transitions, 2866 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:44:43,640 INFO L231 Difference]: Finished difference. Result has 120 places, 166 transitions, 1189 flow [2023-08-27 01:44:43,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1189, PETRI_PLACES=120, PETRI_TRANSITIONS=166} [2023-08-27 01:44:43,641 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 54 predicate places. [2023-08-27 01:44:43,641 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 166 transitions, 1189 flow [2023-08-27 01:44:43,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 156.69565217391303) internal successors, (3604), 23 states have internal predecessors, (3604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:43,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:43,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:44:43,651 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 01:44:43,847 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,SelfDestructingSolverStorable16 [2023-08-27 01:44:43,848 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:43,848 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:43,848 INFO L85 PathProgramCache]: Analyzing trace with hash 960549088, now seen corresponding path program 2 times [2023-08-27 01:44:43,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:43,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824509761] [2023-08-27 01:44:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:43,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:43,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:44,352 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:44:44,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:44,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824509761] [2023-08-27 01:44:44,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824509761] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:44:44,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592775824] [2023-08-27 01:44:44,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:44:44,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:44,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:44:44,354 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:44:44,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 01:44:44,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:44:44,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:44:44,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 01:44:44,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:44:44,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:44:44,639 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:44:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 01:44:44,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:44:44,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592775824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:44,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:44:44,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-08-27 01:44:44,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706065396] [2023-08-27 01:44:44,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:44,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 01:44:44,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:44,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 01:44:44,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-27 01:44:44,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 505 [2023-08-27 01:44:44,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 166 transitions, 1189 flow. Second operand has 7 states, 7 states have (on average 188.85714285714286) internal successors, (1322), 7 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:44,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:44,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 505 [2023-08-27 01:44:44,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:50,399 INFO L124 PetriNetUnfolderBase]: 43916/61439 cut-off events. [2023-08-27 01:44:50,399 INFO L125 PetriNetUnfolderBase]: For 162141/162141 co-relation queries the response was YES. [2023-08-27 01:44:50,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197151 conditions, 61439 events. 43916/61439 cut-off events. For 162141/162141 co-relation queries the response was YES. Maximal size of possible extension queue 1874. Compared 386763 event pairs, 15804 based on Foata normal form. 504/53217 useless extension candidates. Maximal degree in co-relation 197111. Up to 31933 conditions per place. [2023-08-27 01:44:50,878 INFO L140 encePairwiseOnDemand]: 497/505 looper letters, 205 selfloop transitions, 45 changer transitions 0/252 dead transitions. [2023-08-27 01:44:50,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 252 transitions, 2124 flow [2023-08-27 01:44:50,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:44:50,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:44:50,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1237 transitions. [2023-08-27 01:44:50,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40825082508250826 [2023-08-27 01:44:50,880 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1237 transitions. [2023-08-27 01:44:50,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1237 transitions. [2023-08-27 01:44:50,881 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:50,881 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1237 transitions. [2023-08-27 01:44:50,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 206.16666666666666) internal successors, (1237), 6 states have internal predecessors, (1237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:50,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 505.0) internal successors, (3535), 7 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:50,885 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 505.0) internal successors, (3535), 7 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:50,885 INFO L175 Difference]: Start difference. First operand has 120 places, 166 transitions, 1189 flow. Second operand 6 states and 1237 transitions. [2023-08-27 01:44:50,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 252 transitions, 2124 flow [2023-08-27 01:44:52,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 252 transitions, 2023 flow, removed 49 selfloop flow, removed 1 redundant places. [2023-08-27 01:44:52,278 INFO L231 Difference]: Finished difference. Result has 126 places, 175 transitions, 1352 flow [2023-08-27 01:44:52,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1352, PETRI_PLACES=126, PETRI_TRANSITIONS=175} [2023-08-27 01:44:52,279 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 60 predicate places. [2023-08-27 01:44:52,279 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 175 transitions, 1352 flow [2023-08-27 01:44:52,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 188.85714285714286) internal successors, (1322), 7 states have internal predecessors, (1322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:52,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:44:52,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:44:52,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 01:44:52,489 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,SelfDestructingSolverStorable17 [2023-08-27 01:44:52,489 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:44:52,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:44:52,490 INFO L85 PathProgramCache]: Analyzing trace with hash 960548945, now seen corresponding path program 2 times [2023-08-27 01:44:52,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:44:52,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914840628] [2023-08-27 01:44:52,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:44:52,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:44:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:44:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:44:52,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:44:52,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914840628] [2023-08-27 01:44:52,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914840628] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:44:52,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818461220] [2023-08-27 01:44:52,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:44:52,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:44:52,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:44:52,942 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:44:52,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 01:44:53,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:44:53,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:44:53,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 01:44:53,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:44:53,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:44:53,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:44:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 01:44:53,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:44:53,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818461220] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:44:53,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:44:53,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-08-27 01:44:53,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560255335] [2023-08-27 01:44:53,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:44:53,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 01:44:53,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:44:53,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 01:44:53,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-27 01:44:53,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 505 [2023-08-27 01:44:53,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 175 transitions, 1352 flow. Second operand has 7 states, 7 states have (on average 189.85714285714286) internal successors, (1329), 7 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:53,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:44:53,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 505 [2023-08-27 01:44:53,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:44:58,759 INFO L124 PetriNetUnfolderBase]: 43254/60489 cut-off events. [2023-08-27 01:44:58,759 INFO L125 PetriNetUnfolderBase]: For 165945/165945 co-relation queries the response was YES. [2023-08-27 01:44:59,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195811 conditions, 60489 events. 43254/60489 cut-off events. For 165945/165945 co-relation queries the response was YES. Maximal size of possible extension queue 1834. Compared 378933 event pairs, 15284 based on Foata normal form. 288/52131 useless extension candidates. Maximal degree in co-relation 195768. Up to 29404 conditions per place. [2023-08-27 01:44:59,246 INFO L140 encePairwiseOnDemand]: 497/505 looper letters, 201 selfloop transitions, 48 changer transitions 0/251 dead transitions. [2023-08-27 01:44:59,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 251 transitions, 2177 flow [2023-08-27 01:44:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:44:59,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:44:59,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1241 transitions. [2023-08-27 01:44:59,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40957095709570956 [2023-08-27 01:44:59,250 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1241 transitions. [2023-08-27 01:44:59,251 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1241 transitions. [2023-08-27 01:44:59,251 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:44:59,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1241 transitions. [2023-08-27 01:44:59,252 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 206.83333333333334) internal successors, (1241), 6 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:59,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 505.0) internal successors, (3535), 7 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:59,256 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 505.0) internal successors, (3535), 7 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:44:59,256 INFO L175 Difference]: Start difference. First operand has 126 places, 175 transitions, 1352 flow. Second operand 6 states and 1241 transitions. [2023-08-27 01:44:59,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 251 transitions, 2177 flow [2023-08-27 01:45:00,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 251 transitions, 2111 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-27 01:45:00,975 INFO L231 Difference]: Finished difference. Result has 128 places, 175 transitions, 1402 flow [2023-08-27 01:45:00,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=1286, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1402, PETRI_PLACES=128, PETRI_TRANSITIONS=175} [2023-08-27 01:45:00,976 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 62 predicate places. [2023-08-27 01:45:00,976 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 175 transitions, 1402 flow [2023-08-27 01:45:00,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 189.85714285714286) internal successors, (1329), 7 states have internal predecessors, (1329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:45:00,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:45:00,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:45:00,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 01:45:01,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:45:01,177 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:45:01,178 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:45:01,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1203134377, now seen corresponding path program 1 times [2023-08-27 01:45:01,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:45:01,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817142139] [2023-08-27 01:45:01,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:45:01,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:45:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:45:01,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:45:01,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:45:01,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817142139] [2023-08-27 01:45:01,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817142139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:45:01,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660248807] [2023-08-27 01:45:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:45:01,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:45:01,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:45:01,606 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:45:01,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 01:45:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:45:01,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 01:45:01,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:45:01,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:45:01,934 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 01:45:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:45:01,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:45:02,039 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:45:02,039 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 46 treesize of output 38 [2023-08-27 01:45:02,058 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 11 treesize of output 5 [2023-08-27 01:45:02,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:45:02,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660248807] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:45:02,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:45:02,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-27 01:45:02,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809882018] [2023-08-27 01:45:02,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:45:02,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 01:45:02,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:45:02,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 01:45:02,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=280, Unknown=2, NotChecked=0, Total=342 [2023-08-27 01:45:02,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 505 [2023-08-27 01:45:02,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 175 transitions, 1402 flow. Second operand has 19 states, 19 states have (on average 167.21052631578948) internal successors, (3177), 19 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:45:02,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:45:02,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 505 [2023-08-27 01:45:02,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:45:04,101 WARN L839 $PredicateComparison]: unable to prove that (and (<= 1 |c_thread2Thread1of1ForFork3_~temp~0#1|) (forall ((v_ArrVal_919 (Array Int Int))) (< 0 (+ 2147483650 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_919) c_~queue1~0.base) (+ c_~queue1~0.offset (* c_~front1~0 4))))))) is different from false [2023-08-27 01:45:11,897 INFO L124 PetriNetUnfolderBase]: 60916/85038 cut-off events. [2023-08-27 01:45:11,897 INFO L125 PetriNetUnfolderBase]: For 271281/271281 co-relation queries the response was YES. [2023-08-27 01:45:12,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280411 conditions, 85038 events. 60916/85038 cut-off events. For 271281/271281 co-relation queries the response was YES. Maximal size of possible extension queue 2475. Compared 554882 event pairs, 15714 based on Foata normal form. 954/73256 useless extension candidates. Maximal degree in co-relation 280369. Up to 15228 conditions per place. [2023-08-27 01:45:12,653 INFO L140 encePairwiseOnDemand]: 476/505 looper letters, 561 selfloop transitions, 138 changer transitions 1/702 dead transitions. [2023-08-27 01:45:12,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 702 transitions, 5221 flow [2023-08-27 01:45:12,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 01:45:12,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 01:45:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 4999 transitions. [2023-08-27 01:45:12,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3666299963329666 [2023-08-27 01:45:12,658 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 4999 transitions. [2023-08-27 01:45:12,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 4999 transitions. [2023-08-27 01:45:12,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:45:12,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 4999 transitions. [2023-08-27 01:45:12,664 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 185.14814814814815) internal successors, (4999), 27 states have internal predecessors, (4999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:45:12,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 505.0) internal successors, (14140), 28 states have internal predecessors, (14140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:45:12,675 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 505.0) internal successors, (14140), 28 states have internal predecessors, (14140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:45:12,675 INFO L175 Difference]: Start difference. First operand has 128 places, 175 transitions, 1402 flow. Second operand 27 states and 4999 transitions. [2023-08-27 01:45:12,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 702 transitions, 5221 flow [2023-08-27 01:45:15,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 702 transitions, 5136 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 01:45:15,543 INFO L231 Difference]: Finished difference. Result has 167 places, 247 transitions, 2555 flow [2023-08-27 01:45:15,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=1327, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2555, PETRI_PLACES=167, PETRI_TRANSITIONS=247} [2023-08-27 01:45:15,544 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 101 predicate places. [2023-08-27 01:45:15,544 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 247 transitions, 2555 flow [2023-08-27 01:45:15,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 167.21052631578948) internal successors, (3177), 19 states have internal predecessors, (3177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:45:15,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:45:15,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:45:15,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 01:45:15,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:45:15,750 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:45:15,750 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:45:15,750 INFO L85 PathProgramCache]: Analyzing trace with hash -109945789, now seen corresponding path program 1 times [2023-08-27 01:45:15,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:45:15,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583032576] [2023-08-27 01:45:15,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:45:15,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:45:15,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:45:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:45:16,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:45:16,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583032576] [2023-08-27 01:45:16,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583032576] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:45:16,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909920839] [2023-08-27 01:45:16,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:45:16,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:45:16,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:45:16,525 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:45:16,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 01:45:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:45:16,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-27 01:45:16,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:45:16,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:45:16,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:45:16,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:45:16,920 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:45:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 01:45:16,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:45:16,998 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_989 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_989) c_~queue1~0.base) (+ c_~queue1~0.offset (* c_~front1~0 4))) 2147483647)) is different from false [2023-08-27 01:45:17,013 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_988 (Array Int Int)) (v_ArrVal_989 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_988) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_989) c_~queue1~0.base) (+ c_~queue1~0.offset (* c_~front1~0 4))) 2147483647)) is different from false [2023-08-27 01:45:17,025 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:45:17,025 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 72 [2023-08-27 01:45:17,030 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 60 treesize of output 48 [2023-08-27 01:45:17,035 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 26 treesize of output 20 [2023-08-27 01:45:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 01:45:17,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909920839] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 01:45:17,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 01:45:17,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8, 7] total 21 [2023-08-27 01:45:17,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176764922] [2023-08-27 01:45:17,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:45:17,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 01:45:17,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:45:17,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 01:45:17,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=358, Unknown=2, NotChecked=78, Total=506 [2023-08-27 01:45:17,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 505 [2023-08-27 01:45:17,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 247 transitions, 2555 flow. Second operand has 8 states, 8 states have (on average 186.75) internal successors, (1494), 8 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:45:17,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:45:17,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 505 [2023-08-27 01:45:17,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:45:27,798 INFO L124 PetriNetUnfolderBase]: 64532/89774 cut-off events. [2023-08-27 01:45:27,798 INFO L125 PetriNetUnfolderBase]: For 516020/516020 co-relation queries the response was YES. [2023-08-27 01:45:28,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 393463 conditions, 89774 events. 64532/89774 cut-off events. For 516020/516020 co-relation queries the response was YES. Maximal size of possible extension queue 2509. Compared 581804 event pairs, 14090 based on Foata normal form. 207/76666 useless extension candidates. Maximal degree in co-relation 393403. Up to 59065 conditions per place. [2023-08-27 01:45:29,052 INFO L140 encePairwiseOnDemand]: 482/505 looper letters, 232 selfloop transitions, 133 changer transitions 0/367 dead transitions. [2023-08-27 01:45:29,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 367 transitions, 4207 flow [2023-08-27 01:45:29,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:45:29,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:45:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1617 transitions. [2023-08-27 01:45:29,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40024752475247527 [2023-08-27 01:45:29,054 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1617 transitions. [2023-08-27 01:45:29,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1617 transitions. [2023-08-27 01:45:29,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:45:29,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1617 transitions. [2023-08-27 01:45:29,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 202.125) internal successors, (1617), 8 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:45:29,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 505.0) internal successors, (4545), 9 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:45:29,058 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 505.0) internal successors, (4545), 9 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:45:29,058 INFO L175 Difference]: Start difference. First operand has 167 places, 247 transitions, 2555 flow. Second operand 8 states and 1617 transitions. [2023-08-27 01:45:29,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 367 transitions, 4207 flow [2023-08-27 01:45:36,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 367 transitions, 4058 flow, removed 70 selfloop flow, removed 3 redundant places. [2023-08-27 01:45:36,671 INFO L231 Difference]: Finished difference. Result has 176 places, 296 transitions, 3523 flow [2023-08-27 01:45:36,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3523, PETRI_PLACES=176, PETRI_TRANSITIONS=296} [2023-08-27 01:45:36,671 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 110 predicate places. [2023-08-27 01:45:36,672 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 296 transitions, 3523 flow [2023-08-27 01:45:36,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.75) internal successors, (1494), 8 states have internal predecessors, (1494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:45:36,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:45:36,672 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:45:36,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 01:45:36,873 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,SelfDestructingSolverStorable20 [2023-08-27 01:45:36,873 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:45:36,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:45:36,873 INFO L85 PathProgramCache]: Analyzing trace with hash -107322116, now seen corresponding path program 1 times [2023-08-27 01:45:36,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:45:36,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810097314] [2023-08-27 01:45:36,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:45:36,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:45:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:45:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:45:38,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:45:38,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810097314] [2023-08-27 01:45:38,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810097314] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:45:38,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372160442] [2023-08-27 01:45:38,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:45:38,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:45:38,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:45:38,160 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:45:38,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 01:45:38,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:45:38,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-27 01:45:38,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:45:38,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:45:38,482 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:45:38,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:45:38,527 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:45:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 01:45:38,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:45:38,629 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1059 (Array Int Int))) (< 0 (+ 2147483649 c_~d1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1059) c_~queue1~0.base) (+ c_~queue1~0.offset (* c_~front1~0 4)))))) is different from false [2023-08-27 01:45:40,700 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:45:40,700 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 84 [2023-08-27 01:45:40,704 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 72 treesize of output 60 [2023-08-27 01:45:40,708 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2023-08-27 01:45:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 01:45:40,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372160442] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 01:45:40,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 01:45:40,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10, 7] total 23 [2023-08-27 01:45:40,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066348810] [2023-08-27 01:45:40,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:45:40,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 01:45:40,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:45:40,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 01:45:40,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=480, Unknown=6, NotChecked=44, Total=600 [2023-08-27 01:45:40,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 505 [2023-08-27 01:45:40,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 296 transitions, 3523 flow. Second operand has 8 states, 8 states have (on average 185.75) internal successors, (1486), 8 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:45:40,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:45:40,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 505 [2023-08-27 01:45:40,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:45:45,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:45:57,838 INFO L124 PetriNetUnfolderBase]: 70247/98060 cut-off events. [2023-08-27 01:45:57,839 INFO L125 PetriNetUnfolderBase]: For 769622/769622 co-relation queries the response was YES. [2023-08-27 01:45:58,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 528777 conditions, 98060 events. 70247/98060 cut-off events. For 769622/769622 co-relation queries the response was YES. Maximal size of possible extension queue 2777. Compared 649158 event pairs, 26952 based on Foata normal form. 533/84435 useless extension candidates. Maximal degree in co-relation 528711. Up to 65276 conditions per place. [2023-08-27 01:45:59,069 INFO L140 encePairwiseOnDemand]: 492/505 looper letters, 343 selfloop transitions, 82 changer transitions 0/427 dead transitions. [2023-08-27 01:45:59,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 427 transitions, 5591 flow [2023-08-27 01:45:59,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:45:59,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:45:59,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1596 transitions. [2023-08-27 01:45:59,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39504950495049507 [2023-08-27 01:45:59,071 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1596 transitions. [2023-08-27 01:45:59,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1596 transitions. [2023-08-27 01:45:59,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:45:59,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1596 transitions. [2023-08-27 01:45:59,073 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 199.5) internal successors, (1596), 8 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:45:59,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 505.0) internal successors, (4545), 9 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:45:59,075 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 505.0) internal successors, (4545), 9 states have internal predecessors, (4545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:45:59,075 INFO L175 Difference]: Start difference. First operand has 176 places, 296 transitions, 3523 flow. Second operand 8 states and 1596 transitions. [2023-08-27 01:45:59,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 427 transitions, 5591 flow [2023-08-27 01:46:12,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 427 transitions, 5488 flow, removed 35 selfloop flow, removed 2 redundant places. [2023-08-27 01:46:12,047 INFO L231 Difference]: Finished difference. Result has 184 places, 316 transitions, 3953 flow [2023-08-27 01:46:12,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=3442, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3953, PETRI_PLACES=184, PETRI_TRANSITIONS=316} [2023-08-27 01:46:12,047 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 118 predicate places. [2023-08-27 01:46:12,047 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 316 transitions, 3953 flow [2023-08-27 01:46:12,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 185.75) internal successors, (1486), 8 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:46:12,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:46:12,048 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:46:12,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 01:46:12,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-27 01:46:12,249 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:46:12,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:46:12,249 INFO L85 PathProgramCache]: Analyzing trace with hash -109945646, now seen corresponding path program 2 times [2023-08-27 01:46:12,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:46:12,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750614326] [2023-08-27 01:46:12,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:46:12,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:46:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:46:13,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:46:13,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:46:13,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750614326] [2023-08-27 01:46:13,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750614326] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:46:13,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29902027] [2023-08-27 01:46:13,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:46:13,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:46:13,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:46:13,619 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:46:13,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 01:46:13,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:46:13,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:46:13,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 01:46:13,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:46:14,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:46:14,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:46:14,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:46:14,090 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:46:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 01:46:14,132 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:46:14,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29902027] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:46:14,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:46:14,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 16 [2023-08-27 01:46:14,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702820462] [2023-08-27 01:46:14,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:46:14,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 01:46:14,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:46:14,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 01:46:14,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2023-08-27 01:46:14,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 505 [2023-08-27 01:46:14,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 316 transitions, 3953 flow. Second operand has 8 states, 8 states have (on average 185.75) internal successors, (1486), 8 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:46:14,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:46:14,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 505 [2023-08-27 01:46:14,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:46:28,438 INFO L124 PetriNetUnfolderBase]: 75095/105009 cut-off events. [2023-08-27 01:46:28,438 INFO L125 PetriNetUnfolderBase]: For 965968/965968 co-relation queries the response was YES. [2023-08-27 01:46:29,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 590542 conditions, 105009 events. 75095/105009 cut-off events. For 965968/965968 co-relation queries the response was YES. Maximal size of possible extension queue 3072. Compared 701014 event pairs, 28318 based on Foata normal form. 1599/92637 useless extension candidates. Maximal degree in co-relation 590472. Up to 68886 conditions per place. [2023-08-27 01:46:29,876 INFO L140 encePairwiseOnDemand]: 498/505 looper letters, 320 selfloop transitions, 90 changer transitions 0/412 dead transitions. [2023-08-27 01:46:29,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 412 transitions, 5526 flow [2023-08-27 01:46:29,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:46:29,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:46:29,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1219 transitions. [2023-08-27 01:46:29,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023102310231023 [2023-08-27 01:46:29,877 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1219 transitions. [2023-08-27 01:46:29,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1219 transitions. [2023-08-27 01:46:29,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:46:29,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1219 transitions. [2023-08-27 01:46:29,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 203.16666666666666) internal successors, (1219), 6 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 01:46:29,880 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 505.0) internal successors, (3535), 7 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:46:29,880 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 505.0) internal successors, (3535), 7 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:46:29,880 INFO L175 Difference]: Start difference. First operand has 184 places, 316 transitions, 3953 flow. Second operand 6 states and 1219 transitions. [2023-08-27 01:46:29,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 412 transitions, 5526 flow [2023-08-27 01:46:43,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 412 transitions, 5427 flow, removed 33 selfloop flow, removed 2 redundant places. [2023-08-27 01:46:43,818 INFO L231 Difference]: Finished difference. Result has 189 places, 316 transitions, 4175 flow [2023-08-27 01:46:43,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=3679, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4175, PETRI_PLACES=189, PETRI_TRANSITIONS=316} [2023-08-27 01:46:43,818 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 123 predicate places. [2023-08-27 01:46:43,818 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 316 transitions, 4175 flow [2023-08-27 01:46:43,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 185.75) internal successors, (1486), 8 states have internal predecessors, (1486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:46:43,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:46:43,819 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:46:43,823 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 01:46:44,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:46:44,020 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:46:44,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:46:44,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1380785285, now seen corresponding path program 2 times [2023-08-27 01:46:44,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:46:44,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814320205] [2023-08-27 01:46:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:46:44,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:46:44,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:46:45,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:46:45,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:46:45,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814320205] [2023-08-27 01:46:45,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814320205] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:46:45,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042635987] [2023-08-27 01:46:45,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:46:45,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:46:45,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:46:45,385 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:46:45,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 01:46:45,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:46:45,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:46:45,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 01:46:45,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:46:45,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:46:45,655 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:46:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 01:46:45,690 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:46:45,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042635987] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:46:45,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:46:45,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 15 [2023-08-27 01:46:45,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659972381] [2023-08-27 01:46:45,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:46:45,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 01:46:45,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:46:45,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 01:46:45,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-08-27 01:46:45,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 505 [2023-08-27 01:46:45,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 316 transitions, 4175 flow. Second operand has 7 states, 7 states have (on average 190.0) internal successors, (1330), 7 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:46:45,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:46:45,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 505 [2023-08-27 01:46:45,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:47:01,058 INFO L124 PetriNetUnfolderBase]: 80387/112302 cut-off events. [2023-08-27 01:47:01,058 INFO L125 PetriNetUnfolderBase]: For 1087681/1087681 co-relation queries the response was YES. [2023-08-27 01:47:02,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 645151 conditions, 112302 events. 80387/112302 cut-off events. For 1087681/1087681 co-relation queries the response was YES. Maximal size of possible extension queue 3357. Compared 755399 event pairs, 36029 based on Foata normal form. 138/97524 useless extension candidates. Maximal degree in co-relation 645078. Up to 73821 conditions per place. [2023-08-27 01:47:03,081 INFO L140 encePairwiseOnDemand]: 497/505 looper letters, 322 selfloop transitions, 70 changer transitions 0/394 dead transitions. [2023-08-27 01:47:03,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 394 transitions, 5632 flow [2023-08-27 01:47:03,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:47:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:47:03,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1242 transitions. [2023-08-27 01:47:03,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099009900990099 [2023-08-27 01:47:03,087 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1242 transitions. [2023-08-27 01:47:03,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1242 transitions. [2023-08-27 01:47:03,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:47:03,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1242 transitions. [2023-08-27 01:47:03,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 207.0) internal successors, (1242), 6 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:47:03,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 505.0) internal successors, (3535), 7 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:47:03,091 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 505.0) internal successors, (3535), 7 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:47:03,091 INFO L175 Difference]: Start difference. First operand has 189 places, 316 transitions, 4175 flow. Second operand 6 states and 1242 transitions. [2023-08-27 01:47:03,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 394 transitions, 5632 flow [2023-08-27 01:47:21,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 394 transitions, 5487 flow, removed 31 selfloop flow, removed 4 redundant places. [2023-08-27 01:47:21,176 INFO L231 Difference]: Finished difference. Result has 192 places, 321 transitions, 4394 flow [2023-08-27 01:47:21,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=4062, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4394, PETRI_PLACES=192, PETRI_TRANSITIONS=321} [2023-08-27 01:47:21,177 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 126 predicate places. [2023-08-27 01:47:21,177 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 321 transitions, 4394 flow [2023-08-27 01:47:21,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 190.0) internal successors, (1330), 7 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:47:21,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:47:21,177 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:47:21,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 01:47:21,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:47:21,378 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:47:21,378 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:47:21,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1358196068, now seen corresponding path program 3 times [2023-08-27 01:47:21,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:47:21,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021099850] [2023-08-27 01:47:21,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:47:21,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:47:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:47:21,789 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 01:47:21,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:47:21,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021099850] [2023-08-27 01:47:21,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021099850] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:47:21,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495252443] [2023-08-27 01:47:21,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:47:21,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:47:21,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:47:21,793 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:47:21,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 01:47:21,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:47:21,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:47:21,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 01:47:21,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:47:21,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:47:21,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:47:22,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:47:22,059 INFO L322 Elim1Store]: treesize reduction 82, result has 35.9 percent of original size [2023-08-27 01:47:22,060 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 4 case distinctions, treesize of input 18 treesize of output 51 [2023-08-27 01:47:22,118 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:47:22,170 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 01:47:22,171 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 11 treesize of output 11 [2023-08-27 01:47:22,214 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:47:22,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:47:22,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:47:22,344 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:47:22,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:47:22,383 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:47:22,428 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 01:47:22,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:47:22,816 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:47:22,816 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 66 treesize of output 54 [2023-08-27 01:47:22,848 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:47:22,849 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 1286 treesize of output 1254 [2023-08-27 01:47:22,871 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:47:22,872 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 352 treesize of output 336 [2023-08-27 01:47:22,889 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:47:22,890 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 189 [2023-08-27 01:47:22,901 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 270 treesize of output 222 [2023-08-27 01:47:22,912 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 222 treesize of output 198 [2023-08-27 01:47:23,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:47:23,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495252443] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:47:23,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:47:23,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-27 01:47:23,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608030112] [2023-08-27 01:47:23,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:47:23,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 01:47:23,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:47:23,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 01:47:23,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=597, Unknown=7, NotChecked=0, Total=702 [2023-08-27 01:47:23,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 505 [2023-08-27 01:47:23,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 321 transitions, 4394 flow. Second operand has 27 states, 27 states have (on average 155.66666666666666) internal successors, (4203), 27 states have internal predecessors, (4203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:47:23,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:47:23,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 505 [2023-08-27 01:47:23,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:47:27,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:47:55,720 INFO L124 PetriNetUnfolderBase]: 136015/189251 cut-off events. [2023-08-27 01:47:55,720 INFO L125 PetriNetUnfolderBase]: For 1698831/1698831 co-relation queries the response was YES. [2023-08-27 01:47:58,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1092304 conditions, 189251 events. 136015/189251 cut-off events. For 1698831/1698831 co-relation queries the response was YES. Maximal size of possible extension queue 5847. Compared 1353993 event pairs, 23392 based on Foata normal form. 2021/164949 useless extension candidates. Maximal degree in co-relation 1092230. Up to 127122 conditions per place. [2023-08-27 01:47:58,829 INFO L140 encePairwiseOnDemand]: 490/505 looper letters, 689 selfloop transitions, 242 changer transitions 3/936 dead transitions. [2023-08-27 01:47:58,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 936 transitions, 12250 flow [2023-08-27 01:47:58,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 01:47:58,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 01:47:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 5264 transitions. [2023-08-27 01:47:58,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3362503992334717 [2023-08-27 01:47:58,834 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 5264 transitions. [2023-08-27 01:47:58,834 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 5264 transitions. [2023-08-27 01:47:58,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:47:58,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 5264 transitions. [2023-08-27 01:47:58,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 169.80645161290323) internal successors, (5264), 31 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:47:58,851 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 505.0) internal successors, (16160), 32 states have internal predecessors, (16160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:47:58,852 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 505.0) internal successors, (16160), 32 states have internal predecessors, (16160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:47:58,852 INFO L175 Difference]: Start difference. First operand has 192 places, 321 transitions, 4394 flow. Second operand 31 states and 5264 transitions. [2023-08-27 01:47:58,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 936 transitions, 12250 flow [2023-08-27 01:48:31,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 936 transitions, 12210 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-27 01:48:31,296 INFO L231 Difference]: Finished difference. Result has 237 places, 458 transitions, 7884 flow [2023-08-27 01:48:31,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=4355, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=7884, PETRI_PLACES=237, PETRI_TRANSITIONS=458} [2023-08-27 01:48:31,297 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 171 predicate places. [2023-08-27 01:48:31,297 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 458 transitions, 7884 flow [2023-08-27 01:48:31,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 155.66666666666666) internal successors, (4203), 27 states have internal predecessors, (4203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:48:31,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:48:31,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:48:31,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 01:48:31,498 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,SelfDestructingSolverStorable24 [2023-08-27 01:48:31,498 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err6ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:48:31,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:48:31,498 INFO L85 PathProgramCache]: Analyzing trace with hash 264086015, now seen corresponding path program 1 times [2023-08-27 01:48:31,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:48:31,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807822942] [2023-08-27 01:48:31,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:48:31,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:48:31,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:48:31,960 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 01:48:31,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:48:31,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807822942] [2023-08-27 01:48:31,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807822942] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:48:31,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603317417] [2023-08-27 01:48:31,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:48:31,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:48:31,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:48:31,962 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:48:31,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 01:48:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:48:32,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 01:48:32,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:48:32,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:48:32,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 01:48:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:48:32,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:48:32,370 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1342 (Array Int Int))) (< 0 (+ 2147483649 c_~d1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_1342) c_~queue1~0.base) (+ c_~queue1~0.offset (* c_~front1~0 4)))))) is different from false [2023-08-27 01:48:32,380 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:48:32,381 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 40 [2023-08-27 01:48:32,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-08-27 01:48:32,567 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:48:32,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603317417] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:48:32,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:48:32,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 01:48:32,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008526287] [2023-08-27 01:48:32,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:48:32,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:48:32,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:48:32,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:48:32,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=287, Unknown=1, NotChecked=34, Total=380 [2023-08-27 01:48:32,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 505 [2023-08-27 01:48:32,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 458 transitions, 7884 flow. Second operand has 20 states, 20 states have (on average 166.4) internal successors, (3328), 20 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:48:32,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:48:32,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 505 [2023-08-27 01:48:32,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:49:22,009 INFO L124 PetriNetUnfolderBase]: 174169/241145 cut-off events. [2023-08-27 01:49:22,010 INFO L125 PetriNetUnfolderBase]: For 3724593/3724593 co-relation queries the response was YES. [2023-08-27 01:49:26,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1537668 conditions, 241145 events. 174169/241145 cut-off events. For 3724593/3724593 co-relation queries the response was YES. Maximal size of possible extension queue 7560. Compared 1757806 event pairs, 55145 based on Foata normal form. 817/208810 useless extension candidates. Maximal degree in co-relation 1537576. Up to 163227 conditions per place. [2023-08-27 01:49:27,368 INFO L140 encePairwiseOnDemand]: 474/505 looper letters, 852 selfloop transitions, 299 changer transitions 1/1154 dead transitions. [2023-08-27 01:49:27,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 1154 transitions, 16814 flow [2023-08-27 01:49:27,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-27 01:49:27,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-27 01:49:27,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 5528 transitions. [2023-08-27 01:49:27,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36488448844884486 [2023-08-27 01:49:27,376 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 5528 transitions. [2023-08-27 01:49:27,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 5528 transitions. [2023-08-27 01:49:27,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:49:27,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 5528 transitions. [2023-08-27 01:49:27,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 184.26666666666668) internal successors, (5528), 30 states have internal predecessors, (5528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:49:27,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 505.0) internal successors, (15655), 31 states have internal predecessors, (15655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:49:27,395 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 505.0) internal successors, (15655), 31 states have internal predecessors, (15655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:49:27,395 INFO L175 Difference]: Start difference. First operand has 237 places, 458 transitions, 7884 flow. Second operand 30 states and 5528 transitions. [2023-08-27 01:49:27,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 1154 transitions, 16814 flow [2023-08-27 01:51:34,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 1154 transitions, 15975 flow, removed 381 selfloop flow, removed 7 redundant places. [2023-08-27 01:51:34,372 INFO L231 Difference]: Finished difference. Result has 272 places, 619 transitions, 10655 flow [2023-08-27 01:51:34,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=505, PETRI_DIFFERENCE_MINUEND_FLOW=7487, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=10655, PETRI_PLACES=272, PETRI_TRANSITIONS=619} [2023-08-27 01:51:34,373 INFO L281 CegarLoopForPetriNet]: 66 programPoint places, 206 predicate places. [2023-08-27 01:51:34,373 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 619 transitions, 10655 flow [2023-08-27 01:51:34,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 166.4) internal successors, (3328), 20 states have internal predecessors, (3328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:51:34,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:51:34,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:51:34,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 01:51:34,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 01:51:34,575 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 42 more)] === [2023-08-27 01:51:34,575 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:51:34,575 INFO L85 PathProgramCache]: Analyzing trace with hash 865545030, now seen corresponding path program 1 times [2023-08-27 01:51:34,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:51:34,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601091523] [2023-08-27 01:51:34,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:51:34,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:51:34,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:51:35,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:51:35,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:51:35,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601091523] [2023-08-27 01:51:35,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601091523] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:51:35,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055918006] [2023-08-27 01:51:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:51:35,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:51:35,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:51:35,081 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:51:35,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 01:51:35,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:51:35,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 01:51:35,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:51:35,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:51:35,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:51:35,349 INFO L322 Elim1Store]: treesize reduction 124, result has 25.3 percent of original size [2023-08-27 01:51:35,350 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 4 case distinctions, treesize of input 36 treesize of output 62 [2023-08-27 01:51:35,410 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:51:35,456 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 01:51:35,456 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-27 01:51:35,496 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:51:35,532 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:51:35,596 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:51:35,672 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 18 treesize of output 20 [2023-08-27 01:51:35,713 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:51:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:51:35,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:51:35,786 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1427 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_1427) c_~queue1~0.base) (+ c_~queue1~0.offset (* c_~front1~0 4))) 2147483647)) is different from false [2023-08-27 01:51:36,130 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:51:36,131 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 72 treesize of output 60 [2023-08-27 01:51:36,155 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:51:36,156 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 40316 treesize of output 39748 [2023-08-27 01:51:36,201 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:51:36,202 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 438 treesize of output 434 [2023-08-27 01:51:36,217 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 586 treesize of output 538 [2023-08-27 01:51:36,230 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 538 treesize of output 442 [2023-08-27 01:51:36,254 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:51:36,255 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 354 treesize of output 338 [2023-08-27 01:51:36,277 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:51:36,277 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 353 treesize of output 313 [2023-08-27 01:51:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:51:37,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055918006] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:51:37,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:51:37,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 10] total 27 [2023-08-27 01:51:37,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314842294] [2023-08-27 01:51:37,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:51:37,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 01:51:37,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:51:37,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 01:51:37,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=630, Unknown=13, NotChecked=52, Total=812 [2023-08-27 01:51:37,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 505 [2023-08-27 01:51:37,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 619 transitions, 10655 flow. Second operand has 29 states, 29 states have (on average 154.6551724137931) internal successors, (4485), 29 states have internal predecessors, (4485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:51:37,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:51:37,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 505 [2023-08-27 01:51:37,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:51:40,549 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:51:42,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:51:44,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1]