/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 08:19:53,207 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 08:19:53,290 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 08:19:53,295 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 08:19:53,296 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 08:19:53,325 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 08:19:53,326 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 08:19:53,326 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 08:19:53,327 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 08:19:53,330 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 08:19:53,331 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 08:19:53,331 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 08:19:53,331 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 08:19:53,332 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 08:19:53,332 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 08:19:53,333 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 08:19:53,333 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 08:19:53,333 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 08:19:53,333 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 08:19:53,334 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 08:19:53,334 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 08:19:53,334 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 08:19:53,334 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 08:19:53,335 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 08:19:53,335 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 08:19:53,335 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 08:19:53,336 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 08:19:53,336 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:19:53,336 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 08:19:53,336 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 08:19:53,337 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 08:19:53,338 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 08:19:53,338 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 08:19:53,338 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 08:19:53,338 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 08:19:53,339 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 08:19:53,662 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 08:19:53,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 08:19:53,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 08:19:53,687 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 08:19:53,688 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 08:19:53,689 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-27 08:19:54,821 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 08:19:55,052 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 08:19:55,052 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons.wvr.c [2023-08-27 08:19:55,059 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27c93ea70/520c26a0fcb14cb3b9b3d03b86bb9cd8/FLAG728e4789f [2023-08-27 08:19:55,071 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/27c93ea70/520c26a0fcb14cb3b9b3d03b86bb9cd8 [2023-08-27 08:19:55,076 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 08:19:55,077 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 08:19:55,080 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 08:19:55,080 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 08:19:55,083 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 08:19:55,084 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:19:55" (1/1) ... [2023-08-27 08:19:55,085 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@784a6d37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:19:55, skipping insertion in model container [2023-08-27 08:19:55,085 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:19:55" (1/1) ... [2023-08-27 08:19:55,112 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 08:19:55,300 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:19:55,311 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 08:19:55,350 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:19:55,356 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 08:19:55,356 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 08:19:55,364 INFO L206 MainTranslator]: Completed translation [2023-08-27 08:19:55,365 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:19:55 WrapperNode [2023-08-27 08:19:55,365 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 08:19:55,366 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 08:19:55,366 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 08:19:55,367 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 08:19:55,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:19:55" (1/1) ... [2023-08-27 08:19:55,389 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:19:55" (1/1) ... [2023-08-27 08:19:55,420 INFO L138 Inliner]: procedures = 25, calls = 51, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 184 [2023-08-27 08:19:55,421 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 08:19:55,421 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 08:19:55,422 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 08:19:55,422 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 08:19:55,429 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:19:55" (1/1) ... [2023-08-27 08:19:55,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:19:55" (1/1) ... [2023-08-27 08:19:55,442 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:19:55" (1/1) ... [2023-08-27 08:19:55,443 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:19:55" (1/1) ... [2023-08-27 08:19:55,451 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:19:55" (1/1) ... [2023-08-27 08:19:55,454 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:19:55" (1/1) ... [2023-08-27 08:19:55,456 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:19:55" (1/1) ... [2023-08-27 08:19:55,457 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:19:55" (1/1) ... [2023-08-27 08:19:55,459 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 08:19:55,460 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 08:19:55,460 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 08:19:55,460 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 08:19:55,470 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:19:55" (1/1) ... [2023-08-27 08:19:55,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:19:55,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:19:55,498 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-27 08:19:55,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-27 08:19:55,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 08:19:55,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 08:19:55,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 08:19:55,523 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 08:19:55,523 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 08:19:55,523 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 08:19:55,523 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 08:19:55,523 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 08:19:55,523 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-27 08:19:55,524 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-27 08:19:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 08:19:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 08:19:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 08:19:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 08:19:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 08:19:55,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 08:19:55,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 08:19:55,526 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 08:19:55,612 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 08:19:55,614 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 08:19:55,948 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 08:19:56,040 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 08:19:56,040 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 08:19:56,042 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:19:56 BoogieIcfgContainer [2023-08-27 08:19:56,042 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 08:19:56,045 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 08:19:56,045 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 08:19:56,048 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 08:19:56,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 08:19:55" (1/3) ... [2023-08-27 08:19:56,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8f50e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:19:56, skipping insertion in model container [2023-08-27 08:19:56,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:19:55" (2/3) ... [2023-08-27 08:19:56,050 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a8f50e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:19:56, skipping insertion in model container [2023-08-27 08:19:56,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:19:56" (3/3) ... [2023-08-27 08:19:56,051 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons.wvr.c [2023-08-27 08:19:56,067 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 08:19:56,068 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-27 08:19:56,068 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 08:19:56,147 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-27 08:19:56,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 165 transitions, 354 flow [2023-08-27 08:19:56,264 INFO L124 PetriNetUnfolderBase]: 11/162 cut-off events. [2023-08-27 08:19:56,268 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 08:19:56,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 162 events. 11/162 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 152 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 132. Up to 3 conditions per place. [2023-08-27 08:19:56,275 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 165 transitions, 354 flow [2023-08-27 08:19:56,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 150 places, 151 transitions, 320 flow [2023-08-27 08:19:56,286 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 08:19:56,298 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 150 places, 151 transitions, 320 flow [2023-08-27 08:19:56,302 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 150 places, 151 transitions, 320 flow [2023-08-27 08:19:56,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 150 places, 151 transitions, 320 flow [2023-08-27 08:19:56,352 INFO L124 PetriNetUnfolderBase]: 11/151 cut-off events. [2023-08-27 08:19:56,353 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 08:19:56,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164 conditions, 151 events. 11/151 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 150 event pairs, 0 based on Foata normal form. 0/130 useless extension candidates. Maximal degree in co-relation 132. Up to 3 conditions per place. [2023-08-27 08:19:56,355 INFO L119 LiptonReduction]: Number of co-enabled transitions 1754 [2023-08-27 08:20:01,936 INFO L134 LiptonReduction]: Checked pairs total: 3984 [2023-08-27 08:20:01,936 INFO L136 LiptonReduction]: Total number of compositions: 150 [2023-08-27 08:20:01,947 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 08:20:01,952 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;@3ebf6a04, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 08:20:01,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-27 08:20:01,955 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 08:20:01,955 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 08:20:01,955 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 08:20:01,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:01,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 08:20:01,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:01,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:01,960 INFO L85 PathProgramCache]: Analyzing trace with hash 21975, now seen corresponding path program 1 times [2023-08-27 08:20:01,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:01,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058557100] [2023-08-27 08:20:01,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:01,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:02,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:02,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058557100] [2023-08-27 08:20:02,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058557100] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:20:02,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:20:02,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:20:02,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783459713] [2023-08-27 08:20:02,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:20:02,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:20:02,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:02,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:20:02,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:20:02,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 315 [2023-08-27 08:20:02,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:02,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:02,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 315 [2023-08-27 08:20:02,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:02,493 INFO L124 PetriNetUnfolderBase]: 762/1155 cut-off events. [2023-08-27 08:20:02,494 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2023-08-27 08:20:02,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2440 conditions, 1155 events. 762/1155 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4950 event pairs, 640 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 2230. Up to 1133 conditions per place. [2023-08-27 08:20:02,506 INFO L140 encePairwiseOnDemand]: 308/315 looper letters, 30 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2023-08-27 08:20:02,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 154 flow [2023-08-27 08:20:02,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:20:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:20:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 442 transitions. [2023-08-27 08:20:02,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4677248677248677 [2023-08-27 08:20:02,525 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 442 transitions. [2023-08-27 08:20:02,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 442 transitions. [2023-08-27 08:20:02,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:02,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 442 transitions. [2023-08-27 08:20:02,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:02,536 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:02,537 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:02,538 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 88 flow. Second operand 3 states and 442 transitions. [2023-08-27 08:20:02,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 154 flow [2023-08-27 08:20:02,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 142 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-27 08:20:02,548 INFO L231 Difference]: Finished difference. Result has 37 places, 35 transitions, 93 flow [2023-08-27 08:20:02,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=37, PETRI_TRANSITIONS=35} [2023-08-27 08:20:02,552 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -5 predicate places. [2023-08-27 08:20:02,552 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 35 transitions, 93 flow [2023-08-27 08:20:02,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:02,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:02,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 08:20:02,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 08:20:02,553 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:02,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:02,553 INFO L85 PathProgramCache]: Analyzing trace with hash 681903, now seen corresponding path program 1 times [2023-08-27 08:20:02,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:02,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890372576] [2023-08-27 08:20:02,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:02,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:02,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:02,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:02,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890372576] [2023-08-27 08:20:02,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890372576] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:02,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389712639] [2023-08-27 08:20:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:02,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:02,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:20:02,665 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:20:02,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 08:20:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:02,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:20:02,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:20:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:02,783 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:20:02,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389712639] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:20:02,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:20:02,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 3 [2023-08-27 08:20:02,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785378261] [2023-08-27 08:20:02,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:20:02,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:20:02,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:02,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:20:02,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 08:20:02,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 315 [2023-08-27 08:20:02,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 35 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:02,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:02,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 315 [2023-08-27 08:20:02,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:02,946 INFO L124 PetriNetUnfolderBase]: 762/1154 cut-off events. [2023-08-27 08:20:02,947 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 08:20:02,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2362 conditions, 1154 events. 762/1154 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4946 event pairs, 640 based on Foata normal form. 0/718 useless extension candidates. Maximal degree in co-relation 2338. Up to 1129 conditions per place. [2023-08-27 08:20:02,954 INFO L140 encePairwiseOnDemand]: 311/315 looper letters, 28 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2023-08-27 08:20:02,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 153 flow [2023-08-27 08:20:02,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:20:02,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:20:02,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 573 transitions. [2023-08-27 08:20:02,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2023-08-27 08:20:02,958 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 573 transitions. [2023-08-27 08:20:02,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 573 transitions. [2023-08-27 08:20:02,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:02,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 573 transitions. [2023-08-27 08:20:02,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.25) internal successors, (573), 4 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:02,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:02,973 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:02,973 INFO L175 Difference]: Start difference. First operand has 37 places, 35 transitions, 93 flow. Second operand 4 states and 573 transitions. [2023-08-27 08:20:02,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 153 flow [2023-08-27 08:20:02,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 34 transitions, 148 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 08:20:02,974 INFO L231 Difference]: Finished difference. Result has 38 places, 34 transitions, 92 flow [2023-08-27 08:20:02,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=38, PETRI_TRANSITIONS=34} [2023-08-27 08:20:02,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -4 predicate places. [2023-08-27 08:20:02,976 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 34 transitions, 92 flow [2023-08-27 08:20:02,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:02,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:02,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 08:20:02,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 08:20:03,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:03,182 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:03,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:03,183 INFO L85 PathProgramCache]: Analyzing trace with hash 681905, now seen corresponding path program 1 times [2023-08-27 08:20:03,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:03,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099466349] [2023-08-27 08:20:03,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:03,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:03,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:03,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099466349] [2023-08-27 08:20:03,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099466349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:03,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308500637] [2023-08-27 08:20:03,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:03,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:03,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:20:03,297 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:20:03,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 08:20:03,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:03,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:20:03,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:20:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:03,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:20:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:03,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308500637] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:20:03,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:20:03,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 08:20:03,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443553155] [2023-08-27 08:20:03,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:20:03,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:20:03,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:03,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:20:03,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 08:20:03,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 315 [2023-08-27 08:20:03,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 92 flow. Second operand has 7 states, 7 states have (on average 136.14285714285714) internal successors, (953), 7 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:03,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:03,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 315 [2023-08-27 08:20:03,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:03,550 INFO L124 PetriNetUnfolderBase]: 765/1160 cut-off events. [2023-08-27 08:20:03,551 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 08:20:03,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2384 conditions, 1160 events. 765/1160 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4956 event pairs, 640 based on Foata normal form. 0/726 useless extension candidates. Maximal degree in co-relation 2338. Up to 1135 conditions per place. [2023-08-27 08:20:03,557 INFO L140 encePairwiseOnDemand]: 311/315 looper letters, 29 selfloop transitions, 9 changer transitions 0/40 dead transitions. [2023-08-27 08:20:03,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 198 flow [2023-08-27 08:20:03,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:20:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:20:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 851 transitions. [2023-08-27 08:20:03,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45026455026455026 [2023-08-27 08:20:03,561 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 851 transitions. [2023-08-27 08:20:03,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 851 transitions. [2023-08-27 08:20:03,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:03,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 851 transitions. [2023-08-27 08:20:03,564 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 141.83333333333334) internal successors, (851), 6 states have internal predecessors, (851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:03,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 315.0) internal successors, (2205), 7 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:03,568 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 315.0) internal successors, (2205), 7 states have internal predecessors, (2205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:03,569 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 92 flow. Second operand 6 states and 851 transitions. [2023-08-27 08:20:03,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 198 flow [2023-08-27 08:20:03,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 189 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:20:03,570 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 150 flow [2023-08-27 08:20:03,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=150, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2023-08-27 08:20:03,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-27 08:20:03,571 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 150 flow [2023-08-27 08:20:03,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 136.14285714285714) internal successors, (953), 7 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:03,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:03,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 08:20:03,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 08:20:03,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-27 08:20:03,778 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:03,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:03,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1160488220, now seen corresponding path program 1 times [2023-08-27 08:20:03,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:03,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797654140] [2023-08-27 08:20:03,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:03,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:03,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:03,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:03,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797654140] [2023-08-27 08:20:03,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797654140] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:20:03,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:20:03,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:20:03,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060300834] [2023-08-27 08:20:03,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:20:03,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:20:03,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:03,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:20:03,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:20:03,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 315 [2023-08-27 08:20:03,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:03,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:03,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 315 [2023-08-27 08:20:03,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:04,010 INFO L124 PetriNetUnfolderBase]: 613/958 cut-off events. [2023-08-27 08:20:04,010 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:20:04,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2001 conditions, 958 events. 613/958 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 4158 event pairs, 273 based on Foata normal form. 0/648 useless extension candidates. Maximal degree in co-relation 1965. Up to 524 conditions per place. [2023-08-27 08:20:04,016 INFO L140 encePairwiseOnDemand]: 312/315 looper letters, 49 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-27 08:20:04,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 278 flow [2023-08-27 08:20:04,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:20:04,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:20:04,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 455 transitions. [2023-08-27 08:20:04,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-08-27 08:20:04,018 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 455 transitions. [2023-08-27 08:20:04,018 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 455 transitions. [2023-08-27 08:20:04,019 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:04,019 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 455 transitions. [2023-08-27 08:20:04,020 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:04,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:04,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:04,023 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 150 flow. Second operand 3 states and 455 transitions. [2023-08-27 08:20:04,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 278 flow [2023-08-27 08:20:04,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 257 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 08:20:04,030 INFO L231 Difference]: Finished difference. Result has 44 places, 39 transitions, 131 flow [2023-08-27 08:20:04,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=44, PETRI_TRANSITIONS=39} [2023-08-27 08:20:04,032 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-27 08:20:04,032 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 39 transitions, 131 flow [2023-08-27 08:20:04,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 139.0) internal successors, (417), 3 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:04,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:04,033 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 08:20:04,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 08:20:04,034 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:04,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:04,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1159590951, now seen corresponding path program 2 times [2023-08-27 08:20:04,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:04,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164103035] [2023-08-27 08:20:04,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:04,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:04,164 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:04,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:04,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164103035] [2023-08-27 08:20:04,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164103035] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:04,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060814750] [2023-08-27 08:20:04,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:20:04,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:04,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:20:04,169 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:20:04,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 08:20:04,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:20:04,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:20:04,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:20:04,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:20:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:20:04,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:20:04,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060814750] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:20:04,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:20:04,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 08:20:04,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361867170] [2023-08-27 08:20:04,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:20:04,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:20:04,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:04,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:20:04,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:20:04,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 315 [2023-08-27 08:20:04,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 39 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:04,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:04,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 315 [2023-08-27 08:20:04,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:04,374 INFO L124 PetriNetUnfolderBase]: 670/1014 cut-off events. [2023-08-27 08:20:04,374 INFO L125 PetriNetUnfolderBase]: For 158/158 co-relation queries the response was YES. [2023-08-27 08:20:04,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2239 conditions, 1014 events. 670/1014 cut-off events. For 158/158 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4220 event pairs, 548 based on Foata normal form. 1/805 useless extension candidates. Maximal degree in co-relation 2213. Up to 995 conditions per place. [2023-08-27 08:20:04,380 INFO L140 encePairwiseOnDemand]: 313/315 looper letters, 35 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-27 08:20:04,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 38 transitions, 193 flow [2023-08-27 08:20:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:20:04,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:20:04,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 437 transitions. [2023-08-27 08:20:04,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4624338624338624 [2023-08-27 08:20:04,382 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 437 transitions. [2023-08-27 08:20:04,382 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 437 transitions. [2023-08-27 08:20:04,382 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:04,382 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 437 transitions. [2023-08-27 08:20:04,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:04,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:04,386 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:04,386 INFO L175 Difference]: Start difference. First operand has 44 places, 39 transitions, 131 flow. Second operand 3 states and 437 transitions. [2023-08-27 08:20:04,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 38 transitions, 193 flow [2023-08-27 08:20:04,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 173 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-27 08:20:04,389 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 103 flow [2023-08-27 08:20:04,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2023-08-27 08:20:04,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-27 08:20:04,391 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 103 flow [2023-08-27 08:20:04,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:04,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:04,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 08:20:04,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 08:20:04,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:04,596 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:04,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:04,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1160488206, now seen corresponding path program 1 times [2023-08-27 08:20:04,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:04,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009544137] [2023-08-27 08:20:04,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:04,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:04,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:04,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:04,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009544137] [2023-08-27 08:20:04,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009544137] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:20:04,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:20:04,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:20:04,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837773682] [2023-08-27 08:20:04,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:20:04,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:20:04,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:04,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:20:04,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:20:04,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 315 [2023-08-27 08:20:04,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:04,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:04,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 315 [2023-08-27 08:20:04,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:04,770 INFO L124 PetriNetUnfolderBase]: 518/812 cut-off events. [2023-08-27 08:20:04,770 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 08:20:04,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1677 conditions, 812 events. 518/812 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3444 event pairs, 181 based on Foata normal form. 0/576 useless extension candidates. Maximal degree in co-relation 1669. Up to 476 conditions per place. [2023-08-27 08:20:04,774 INFO L140 encePairwiseOnDemand]: 311/315 looper letters, 46 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-08-27 08:20:04,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 227 flow [2023-08-27 08:20:04,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:20:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:20:04,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 574 transitions. [2023-08-27 08:20:04,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45555555555555555 [2023-08-27 08:20:04,777 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 574 transitions. [2023-08-27 08:20:04,777 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 574 transitions. [2023-08-27 08:20:04,777 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:04,777 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 574 transitions. [2023-08-27 08:20:04,778 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:04,780 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:04,781 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:04,781 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 103 flow. Second operand 4 states and 574 transitions. [2023-08-27 08:20:04,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 227 flow [2023-08-27 08:20:04,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 50 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:20:04,782 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 106 flow [2023-08-27 08:20:04,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2023-08-27 08:20:04,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -2 predicate places. [2023-08-27 08:20:04,783 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 106 flow [2023-08-27 08:20:04,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:04,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:04,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 08:20:04,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 08:20:04,784 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:04,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:04,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1160488320, now seen corresponding path program 1 times [2023-08-27 08:20:04,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:04,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686704423] [2023-08-27 08:20:04,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:04,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:04,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:04,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:04,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686704423] [2023-08-27 08:20:04,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686704423] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:20:04,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:20:04,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:20:04,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617193835] [2023-08-27 08:20:04,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:20:04,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:20:04,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:04,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:20:04,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:20:04,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 128 out of 315 [2023-08-27 08:20:04,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:04,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:04,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 128 of 315 [2023-08-27 08:20:04,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:04,990 INFO L124 PetriNetUnfolderBase]: 667/1041 cut-off events. [2023-08-27 08:20:04,991 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2023-08-27 08:20:04,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 1041 events. 667/1041 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 4584 event pairs, 549 based on Foata normal form. 20/873 useless extension candidates. Maximal degree in co-relation 2250. Up to 852 conditions per place. [2023-08-27 08:20:04,996 INFO L140 encePairwiseOnDemand]: 306/315 looper letters, 48 selfloop transitions, 3 changer transitions 1/54 dead transitions. [2023-08-27 08:20:04,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 54 transitions, 252 flow [2023-08-27 08:20:04,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:20:04,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:20:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 564 transitions. [2023-08-27 08:20:04,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2023-08-27 08:20:04,998 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 564 transitions. [2023-08-27 08:20:04,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 564 transitions. [2023-08-27 08:20:04,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:04,999 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 564 transitions. [2023-08-27 08:20:05,000 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 141.0) internal successors, (564), 4 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:05,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:05,002 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:05,002 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 106 flow. Second operand 4 states and 564 transitions. [2023-08-27 08:20:05,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 54 transitions, 252 flow [2023-08-27 08:20:05,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 54 transitions, 244 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 08:20:05,004 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 119 flow [2023-08-27 08:20:05,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=119, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-27 08:20:05,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-27 08:20:05,005 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 119 flow [2023-08-27 08:20:05,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 129.25) internal successors, (517), 4 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:05,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:05,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:20:05,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 08:20:05,006 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:05,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:05,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1588477864, now seen corresponding path program 1 times [2023-08-27 08:20:05,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:05,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793784668] [2023-08-27 08:20:05,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:05,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:05,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:05,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793784668] [2023-08-27 08:20:05,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793784668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:05,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521403597] [2023-08-27 08:20:05,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:05,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:05,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:20:05,086 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:20:05,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 08:20:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:05,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:20:05,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:20:05,180 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 08:20:05,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:20:05,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521403597] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:20:05,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:20:05,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 08:20:05,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461715361] [2023-08-27 08:20:05,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:20:05,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:20:05,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:05,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:20:05,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:20:05,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 315 [2023-08-27 08:20:05,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 119 flow. Second operand has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:05,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:05,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 315 [2023-08-27 08:20:05,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:05,282 INFO L124 PetriNetUnfolderBase]: 524/820 cut-off events. [2023-08-27 08:20:05,282 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-08-27 08:20:05,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1805 conditions, 820 events. 524/820 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3440 event pairs, 409 based on Foata normal form. 0/657 useless extension candidates. Maximal degree in co-relation 1795. Up to 794 conditions per place. [2023-08-27 08:20:05,286 INFO L140 encePairwiseOnDemand]: 312/315 looper letters, 32 selfloop transitions, 1 changer transitions 0/35 dead transitions. [2023-08-27 08:20:05,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 177 flow [2023-08-27 08:20:05,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:20:05,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:20:05,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 447 transitions. [2023-08-27 08:20:05,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.473015873015873 [2023-08-27 08:20:05,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 447 transitions. [2023-08-27 08:20:05,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 447 transitions. [2023-08-27 08:20:05,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:05,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 447 transitions. [2023-08-27 08:20:05,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:05,291 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:05,292 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:05,292 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 119 flow. Second operand 3 states and 447 transitions. [2023-08-27 08:20:05,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 177 flow [2023-08-27 08:20:05,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:20:05,293 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 108 flow [2023-08-27 08:20:05,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2023-08-27 08:20:05,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-27 08:20:05,294 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 108 flow [2023-08-27 08:20:05,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:05,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:05,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:20:05,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 08:20:05,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:05,501 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:05,501 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:05,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1993377049, now seen corresponding path program 1 times [2023-08-27 08:20:05,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:05,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832005457] [2023-08-27 08:20:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:05,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:05,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:05,577 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 08:20:05,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:05,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832005457] [2023-08-27 08:20:05,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832005457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:20:05,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:20:05,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:20:05,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218829983] [2023-08-27 08:20:05,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:20:05,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:20:05,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:05,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:20:05,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:20:05,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 315 [2023-08-27 08:20:05,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:05,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:05,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 315 [2023-08-27 08:20:05,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:05,681 INFO L124 PetriNetUnfolderBase]: 508/839 cut-off events. [2023-08-27 08:20:05,682 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2023-08-27 08:20:05,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1854 conditions, 839 events. 508/839 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3526 event pairs, 250 based on Foata normal form. 22/733 useless extension candidates. Maximal degree in co-relation 1844. Up to 467 conditions per place. [2023-08-27 08:20:05,686 INFO L140 encePairwiseOnDemand]: 310/315 looper letters, 48 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-27 08:20:05,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 249 flow [2023-08-27 08:20:05,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:20:05,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:20:05,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 453 transitions. [2023-08-27 08:20:05,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793650793650794 [2023-08-27 08:20:05,688 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 453 transitions. [2023-08-27 08:20:05,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 453 transitions. [2023-08-27 08:20:05,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:05,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 453 transitions. [2023-08-27 08:20:05,689 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:05,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:05,691 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 315.0) internal successors, (1260), 4 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:05,691 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 108 flow. Second operand 3 states and 453 transitions. [2023-08-27 08:20:05,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 249 flow [2023-08-27 08:20:05,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:20:05,692 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 125 flow [2023-08-27 08:20:05,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-27 08:20:05,693 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -1 predicate places. [2023-08-27 08:20:05,693 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 125 flow [2023-08-27 08:20:05,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:05,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:05,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:20:05,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 08:20:05,694 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:05,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:05,694 INFO L85 PathProgramCache]: Analyzing trace with hash 777174418, now seen corresponding path program 1 times [2023-08-27 08:20:05,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:05,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463191840] [2023-08-27 08:20:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:05,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:06,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:06,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463191840] [2023-08-27 08:20:06,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463191840] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:06,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593530479] [2023-08-27 08:20:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:06,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:06,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:20:06,247 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:20:06,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 08:20:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:06,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 08:20:06,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:20:06,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:06,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:20:06,554 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:20:06,554 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-27 08:20:06,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:06,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593530479] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:20:06,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:20:06,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-08-27 08:20:06,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925513006] [2023-08-27 08:20:06,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:20:06,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 08:20:06,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:06,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 08:20:06,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:20:06,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 315 [2023-08-27 08:20:06,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 125 flow. Second operand has 15 states, 15 states have (on average 104.0) internal successors, (1560), 15 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:06,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:06,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 315 [2023-08-27 08:20:06,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:07,565 INFO L124 PetriNetUnfolderBase]: 1582/2549 cut-off events. [2023-08-27 08:20:07,565 INFO L125 PetriNetUnfolderBase]: For 637/637 co-relation queries the response was YES. [2023-08-27 08:20:07,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6255 conditions, 2549 events. 1582/2549 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 13343 event pairs, 451 based on Foata normal form. 0/2145 useless extension candidates. Maximal degree in co-relation 6243. Up to 591 conditions per place. [2023-08-27 08:20:07,579 INFO L140 encePairwiseOnDemand]: 305/315 looper letters, 138 selfloop transitions, 29 changer transitions 0/169 dead transitions. [2023-08-27 08:20:07,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 169 transitions, 839 flow [2023-08-27 08:20:07,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 08:20:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 08:20:07,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1495 transitions. [2023-08-27 08:20:07,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2023-08-27 08:20:07,584 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1495 transitions. [2023-08-27 08:20:07,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1495 transitions. [2023-08-27 08:20:07,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:07,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1495 transitions. [2023-08-27 08:20:07,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 115.0) internal successors, (1495), 13 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:07,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 315.0) internal successors, (4410), 14 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:07,596 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 315.0) internal successors, (4410), 14 states have internal predecessors, (4410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:07,596 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 125 flow. Second operand 13 states and 1495 transitions. [2023-08-27 08:20:07,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 169 transitions, 839 flow [2023-08-27 08:20:07,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 169 transitions, 791 flow, removed 22 selfloop flow, removed 1 redundant places. [2023-08-27 08:20:07,601 INFO L231 Difference]: Finished difference. Result has 59 places, 64 transitions, 339 flow [2023-08-27 08:20:07,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=339, PETRI_PLACES=59, PETRI_TRANSITIONS=64} [2023-08-27 08:20:07,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2023-08-27 08:20:07,602 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 64 transitions, 339 flow [2023-08-27 08:20:07,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 104.0) internal successors, (1560), 15 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:07,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:07,603 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:20:07,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 08:20:07,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-27 08:20:07,810 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:07,810 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:07,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1726265177, now seen corresponding path program 1 times [2023-08-27 08:20:07,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:07,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524614597] [2023-08-27 08:20:07,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:07,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:08,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:08,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524614597] [2023-08-27 08:20:08,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524614597] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:08,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500983529] [2023-08-27 08:20:08,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:08,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:08,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:20:08,817 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:20:08,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 08:20:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:08,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-27 08:20:08,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:20:09,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:20:09,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:20:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:20:09,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:20:09,133 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:20:09,134 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 08:20:09,139 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 08:20:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:20:09,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500983529] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:09,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 08:20:09,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 15 [2023-08-27 08:20:09,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135026276] [2023-08-27 08:20:09,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:20:09,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 08:20:09,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:09,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 08:20:09,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=223, Unknown=4, NotChecked=0, Total=272 [2023-08-27 08:20:09,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 315 [2023-08-27 08:20:09,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 64 transitions, 339 flow. Second operand has 6 states, 6 states have (on average 119.66666666666667) internal successors, (718), 6 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:09,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:09,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 315 [2023-08-27 08:20:09,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:09,620 INFO L124 PetriNetUnfolderBase]: 1677/2704 cut-off events. [2023-08-27 08:20:09,620 INFO L125 PetriNetUnfolderBase]: For 3768/3776 co-relation queries the response was YES. [2023-08-27 08:20:09,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7779 conditions, 2704 events. 1677/2704 cut-off events. For 3768/3776 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 14296 event pairs, 567 based on Foata normal form. 0/2373 useless extension candidates. Maximal degree in co-relation 7759. Up to 1496 conditions per place. [2023-08-27 08:20:09,638 INFO L140 encePairwiseOnDemand]: 308/315 looper letters, 86 selfloop transitions, 21 changer transitions 0/109 dead transitions. [2023-08-27 08:20:09,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 109 transitions, 719 flow [2023-08-27 08:20:09,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:20:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:20:09,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 659 transitions. [2023-08-27 08:20:09,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4184126984126984 [2023-08-27 08:20:09,641 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 659 transitions. [2023-08-27 08:20:09,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 659 transitions. [2023-08-27 08:20:09,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:09,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 659 transitions. [2023-08-27 08:20:09,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.8) internal successors, (659), 5 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:09,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:09,645 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:09,646 INFO L175 Difference]: Start difference. First operand has 59 places, 64 transitions, 339 flow. Second operand 5 states and 659 transitions. [2023-08-27 08:20:09,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 109 transitions, 719 flow [2023-08-27 08:20:09,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 109 transitions, 695 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-27 08:20:09,656 INFO L231 Difference]: Finished difference. Result has 63 places, 73 transitions, 455 flow [2023-08-27 08:20:09,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=455, PETRI_PLACES=63, PETRI_TRANSITIONS=73} [2023-08-27 08:20:09,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2023-08-27 08:20:09,656 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 73 transitions, 455 flow [2023-08-27 08:20:09,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.66666666666667) internal successors, (718), 6 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:09,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:09,657 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:20:09,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 08:20:09,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:09,865 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:09,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:09,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1677394953, now seen corresponding path program 1 times [2023-08-27 08:20:09,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:09,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370790506] [2023-08-27 08:20:09,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:09,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:09,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:10,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:10,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:10,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370790506] [2023-08-27 08:20:10,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370790506] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:10,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147143410] [2023-08-27 08:20:10,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:10,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:10,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:20:10,441 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:20:10,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 08:20:10,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:10,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 08:20:10,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:20:10,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 08:20:10,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:20:10,658 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 08:20:10,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:20:10,749 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 08:20:10,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:20:10,833 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 08:20:10,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:10,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:20:10,887 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_374 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_374) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2023-08-27 08:20:15,107 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:20:15,108 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 34 treesize of output 35 [2023-08-27 08:20:15,119 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:20:15,120 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 341 treesize of output 325 [2023-08-27 08:20:15,129 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 152 treesize of output 128 [2023-08-27 08:20:15,137 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 61 treesize of output 55 [2023-08-27 08:20:15,145 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 54 [2023-08-27 08:20:15,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:15,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147143410] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:20:15,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:20:15,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 08:20:15,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413553770] [2023-08-27 08:20:15,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:20:15,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:20:15,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:15,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:20:15,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=282, Unknown=1, NotChecked=34, Total=380 [2023-08-27 08:20:15,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 315 [2023-08-27 08:20:15,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 73 transitions, 455 flow. Second operand has 20 states, 20 states have (on average 100.65) internal successors, (2013), 20 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:15,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:15,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 315 [2023-08-27 08:20:15,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:22,169 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 08:20:23,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:20:23,338 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ c_~queue~0.offset (* c_~front~0 4)))) (and (forall ((v_ArrVal_374 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_374) c_~queue~0.base) .cse0)) 2147483648)) (or (<= c_~n~0 c_~back~0) (forall ((v_ArrVal_373 (Array Int Int)) (v_ArrVal_374 (Array Int Int))) (< (+ (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_373) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_374) c_~queue~0.base) .cse0) c_~d~0) 2147483648)) (< c_~back~0 0)))) is different from false [2023-08-27 08:20:23,627 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_374 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_374) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)))) (and .cse0 (or (<= c_~n~0 c_~back~0) .cse0 (< c_~back~0 0)))) is different from false [2023-08-27 08:20:24,440 INFO L124 PetriNetUnfolderBase]: 2591/4072 cut-off events. [2023-08-27 08:20:24,441 INFO L125 PetriNetUnfolderBase]: For 9082/9082 co-relation queries the response was YES. [2023-08-27 08:20:24,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12783 conditions, 4072 events. 2591/4072 cut-off events. For 9082/9082 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 22351 event pairs, 796 based on Foata normal form. 0/3580 useless extension candidates. Maximal degree in co-relation 12760. Up to 2050 conditions per place. [2023-08-27 08:20:24,465 INFO L140 encePairwiseOnDemand]: 298/315 looper letters, 142 selfloop transitions, 67 changer transitions 2/213 dead transitions. [2023-08-27 08:20:24,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 213 transitions, 1555 flow [2023-08-27 08:20:24,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 08:20:24,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 08:20:24,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1644 transitions. [2023-08-27 08:20:24,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34793650793650793 [2023-08-27 08:20:24,471 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1644 transitions. [2023-08-27 08:20:24,471 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1644 transitions. [2023-08-27 08:20:24,472 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:24,472 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1644 transitions. [2023-08-27 08:20:24,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 109.6) internal successors, (1644), 15 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:24,481 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 315.0) internal successors, (5040), 16 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:24,482 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 315.0) internal successors, (5040), 16 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:24,482 INFO L175 Difference]: Start difference. First operand has 63 places, 73 transitions, 455 flow. Second operand 15 states and 1644 transitions. [2023-08-27 08:20:24,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 213 transitions, 1555 flow [2023-08-27 08:20:24,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 213 transitions, 1528 flow, removed 10 selfloop flow, removed 1 redundant places. [2023-08-27 08:20:24,501 INFO L231 Difference]: Finished difference. Result has 83 places, 127 transitions, 1146 flow [2023-08-27 08:20:24,501 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1146, PETRI_PLACES=83, PETRI_TRANSITIONS=127} [2023-08-27 08:20:24,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2023-08-27 08:20:24,502 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 127 transitions, 1146 flow [2023-08-27 08:20:24,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 100.65) internal successors, (2013), 20 states have internal predecessors, (2013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:24,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:24,503 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:20:24,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-27 08:20:24,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:24,709 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:24,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:24,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1753731374, now seen corresponding path program 1 times [2023-08-27 08:20:24,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:24,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154771007] [2023-08-27 08:20:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:24,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:25,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:25,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154771007] [2023-08-27 08:20:25,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154771007] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:25,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637719964] [2023-08-27 08:20:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:25,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:25,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:20:25,477 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:20:25,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 08:20:25,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:25,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-27 08:20:25,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:20:25,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:20:25,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:20:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:20:25,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:20:25,900 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:20:25,900 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 08:20:25,907 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 08:20:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:20:26,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637719964] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:26,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 08:20:26,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 15 [2023-08-27 08:20:26,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271416692] [2023-08-27 08:20:26,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:20:26,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 08:20:26,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:26,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 08:20:26,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=221, Unknown=2, NotChecked=0, Total=272 [2023-08-27 08:20:26,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 315 [2023-08-27 08:20:26,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 127 transitions, 1146 flow. Second operand has 6 states, 6 states have (on average 119.83333333333333) internal successors, (719), 6 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 08:20:26,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:26,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 315 [2023-08-27 08:20:26,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:26,839 INFO L124 PetriNetUnfolderBase]: 3339/5217 cut-off events. [2023-08-27 08:20:26,839 INFO L125 PetriNetUnfolderBase]: For 21759/21807 co-relation queries the response was YES. [2023-08-27 08:20:26,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23167 conditions, 5217 events. 3339/5217 cut-off events. For 21759/21807 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 28995 event pairs, 1054 based on Foata normal form. 100/4680 useless extension candidates. Maximal degree in co-relation 23136. Up to 3334 conditions per place. [2023-08-27 08:20:26,871 INFO L140 encePairwiseOnDemand]: 308/315 looper letters, 167 selfloop transitions, 36 changer transitions 0/205 dead transitions. [2023-08-27 08:20:26,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 205 transitions, 2031 flow [2023-08-27 08:20:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:20:26,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:20:26,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 666 transitions. [2023-08-27 08:20:26,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4228571428571429 [2023-08-27 08:20:26,874 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 666 transitions. [2023-08-27 08:20:26,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 666 transitions. [2023-08-27 08:20:26,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:26,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 666 transitions. [2023-08-27 08:20:26,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.2) internal successors, (666), 5 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:26,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:26,879 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 315.0) internal successors, (1890), 6 states have internal predecessors, (1890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:26,879 INFO L175 Difference]: Start difference. First operand has 83 places, 127 transitions, 1146 flow. Second operand 5 states and 666 transitions. [2023-08-27 08:20:26,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 205 transitions, 2031 flow [2023-08-27 08:20:26,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 205 transitions, 1901 flow, removed 60 selfloop flow, removed 4 redundant places. [2023-08-27 08:20:26,925 INFO L231 Difference]: Finished difference. Result has 84 places, 137 transitions, 1259 flow [2023-08-27 08:20:26,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1259, PETRI_PLACES=84, PETRI_TRANSITIONS=137} [2023-08-27 08:20:26,927 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2023-08-27 08:20:26,927 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 137 transitions, 1259 flow [2023-08-27 08:20:26,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.83333333333333) internal successors, (719), 6 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 08:20:26,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:26,927 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:20:26,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 08:20:27,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-27 08:20:27,132 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:27,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:27,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1702554750, now seen corresponding path program 2 times [2023-08-27 08:20:27,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:27,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545758039] [2023-08-27 08:20:27,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:27,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:28,174 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:28,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:28,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545758039] [2023-08-27 08:20:28,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545758039] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:28,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371685222] [2023-08-27 08:20:28,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:20:28,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:28,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:20:28,176 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:20:28,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 08:20:28,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:20:28,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:20:28,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 08:20:28,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:20:28,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:20:28,398 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:20:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:20:28,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:20:28,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371685222] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:20:28,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:20:28,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-08-27 08:20:28,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930756441] [2023-08-27 08:20:28,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:20:28,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 08:20:28,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:28,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 08:20:28,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2023-08-27 08:20:28,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 315 [2023-08-27 08:20:28,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 137 transitions, 1259 flow. Second operand has 6 states, 6 states have (on average 119.66666666666667) internal successors, (718), 6 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:28,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:28,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 315 [2023-08-27 08:20:28,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:28,989 INFO L124 PetriNetUnfolderBase]: 3330/5208 cut-off events. [2023-08-27 08:20:28,989 INFO L125 PetriNetUnfolderBase]: For 18836/18884 co-relation queries the response was YES. [2023-08-27 08:20:28,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23387 conditions, 5208 events. 3330/5208 cut-off events. For 18836/18884 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 28953 event pairs, 894 based on Foata normal form. 9/4580 useless extension candidates. Maximal degree in co-relation 23355. Up to 3554 conditions per place. [2023-08-27 08:20:29,028 INFO L140 encePairwiseOnDemand]: 310/315 looper letters, 130 selfloop transitions, 37 changer transitions 0/169 dead transitions. [2023-08-27 08:20:29,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 169 transitions, 1722 flow [2023-08-27 08:20:29,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:20:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:20:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 531 transitions. [2023-08-27 08:20:29,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2023-08-27 08:20:29,030 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 531 transitions. [2023-08-27 08:20:29,030 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 531 transitions. [2023-08-27 08:20:29,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:29,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 531 transitions. [2023-08-27 08:20:29,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.75) internal successors, (531), 4 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:29,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:29,033 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:29,034 INFO L175 Difference]: Start difference. First operand has 84 places, 137 transitions, 1259 flow. Second operand 4 states and 531 transitions. [2023-08-27 08:20:29,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 169 transitions, 1722 flow [2023-08-27 08:20:29,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 169 transitions, 1651 flow, removed 8 selfloop flow, removed 3 redundant places. [2023-08-27 08:20:29,071 INFO L231 Difference]: Finished difference. Result has 84 places, 132 transitions, 1211 flow [2023-08-27 08:20:29,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1211, PETRI_PLACES=84, PETRI_TRANSITIONS=132} [2023-08-27 08:20:29,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2023-08-27 08:20:29,072 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 132 transitions, 1211 flow [2023-08-27 08:20:29,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 119.66666666666667) internal successors, (718), 6 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:29,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:29,072 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:20:29,083 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-27 08:20:29,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-27 08:20:29,278 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:29,278 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:29,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1974611101, now seen corresponding path program 2 times [2023-08-27 08:20:29,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:29,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736209701] [2023-08-27 08:20:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:29,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:29,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:29,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736209701] [2023-08-27 08:20:29,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736209701] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:29,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522852117] [2023-08-27 08:20:29,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:20:29,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:29,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:20:29,961 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:20:29,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 08:20:30,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:20:30,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:20:30,067 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 08:20:30,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:20:30,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:20:30,235 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:20:30,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:20:30,287 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:20:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:20:30,317 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:20:30,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522852117] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:20:30,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:20:30,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-27 08:20:30,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583263603] [2023-08-27 08:20:30,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:20:30,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:20:30,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:30,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:20:30,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-08-27 08:20:30,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 315 [2023-08-27 08:20:30,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 132 transitions, 1211 flow. Second operand has 7 states, 7 states have (on average 116.57142857142857) internal successors, (816), 7 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:30,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:30,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 315 [2023-08-27 08:20:30,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:30,925 INFO L124 PetriNetUnfolderBase]: 3324/5246 cut-off events. [2023-08-27 08:20:30,925 INFO L125 PetriNetUnfolderBase]: For 19553/19553 co-relation queries the response was YES. [2023-08-27 08:20:30,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23299 conditions, 5246 events. 3324/5246 cut-off events. For 19553/19553 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29706 event pairs, 1201 based on Foata normal form. 0/4677 useless extension candidates. Maximal degree in co-relation 23267. Up to 3371 conditions per place. [2023-08-27 08:20:30,953 INFO L140 encePairwiseOnDemand]: 310/315 looper letters, 114 selfloop transitions, 42 changer transitions 0/158 dead transitions. [2023-08-27 08:20:30,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 158 transitions, 1634 flow [2023-08-27 08:20:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:20:30,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:20:30,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 519 transitions. [2023-08-27 08:20:30,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2023-08-27 08:20:30,955 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 519 transitions. [2023-08-27 08:20:30,955 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 519 transitions. [2023-08-27 08:20:30,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:30,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 519 transitions. [2023-08-27 08:20:30,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.75) internal successors, (519), 4 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:30,958 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:30,959 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:30,959 INFO L175 Difference]: Start difference. First operand has 84 places, 132 transitions, 1211 flow. Second operand 4 states and 519 transitions. [2023-08-27 08:20:30,959 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 158 transitions, 1634 flow [2023-08-27 08:20:30,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 158 transitions, 1560 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 08:20:30,995 INFO L231 Difference]: Finished difference. Result has 85 places, 129 transitions, 1244 flow [2023-08-27 08:20:30,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=1083, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1244, PETRI_PLACES=85, PETRI_TRANSITIONS=129} [2023-08-27 08:20:30,995 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2023-08-27 08:20:30,995 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 129 transitions, 1244 flow [2023-08-27 08:20:30,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.57142857142857) internal successors, (816), 7 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:30,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:30,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:20:31,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 08:20:31,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 08:20:31,201 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:31,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:31,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1108463734, now seen corresponding path program 2 times [2023-08-27 08:20:31,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:31,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074732821] [2023-08-27 08:20:31,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:31,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:31,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:31,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:31,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074732821] [2023-08-27 08:20:31,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074732821] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:31,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493332347] [2023-08-27 08:20:31,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:20:31,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:31,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:20:31,693 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:20:31,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 08:20:31,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:20:31,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:20:31,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 08:20:31,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:20:32,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:20:32,000 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:20:32,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:20:32,053 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:20:32,080 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 08:20:32,080 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:20:32,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493332347] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:20:32,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:20:32,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-08-27 08:20:32,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673364202] [2023-08-27 08:20:32,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:20:32,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:20:32,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:32,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:20:32,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-08-27 08:20:32,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 315 [2023-08-27 08:20:32,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 129 transitions, 1244 flow. Second operand has 7 states, 7 states have (on average 116.57142857142857) internal successors, (816), 7 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:32,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:32,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 315 [2023-08-27 08:20:32,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:32,665 INFO L124 PetriNetUnfolderBase]: 3224/5146 cut-off events. [2023-08-27 08:20:32,666 INFO L125 PetriNetUnfolderBase]: For 22067/22067 co-relation queries the response was YES. [2023-08-27 08:20:32,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22919 conditions, 5146 events. 3224/5146 cut-off events. For 22067/22067 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 29442 event pairs, 1201 based on Foata normal form. 100/4677 useless extension candidates. Maximal degree in co-relation 22886. Up to 3366 conditions per place. [2023-08-27 08:20:32,695 INFO L140 encePairwiseOnDemand]: 311/315 looper letters, 114 selfloop transitions, 37 changer transitions 0/153 dead transitions. [2023-08-27 08:20:32,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 153 transitions, 1591 flow [2023-08-27 08:20:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:20:32,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:20:32,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 518 transitions. [2023-08-27 08:20:32,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2023-08-27 08:20:32,697 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 518 transitions. [2023-08-27 08:20:32,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 518 transitions. [2023-08-27 08:20:32,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:32,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 518 transitions. [2023-08-27 08:20:32,699 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 129.5) internal successors, (518), 4 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:32,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:32,700 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:32,700 INFO L175 Difference]: Start difference. First operand has 85 places, 129 transitions, 1244 flow. Second operand 4 states and 518 transitions. [2023-08-27 08:20:32,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 153 transitions, 1591 flow [2023-08-27 08:20:32,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 153 transitions, 1545 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-27 08:20:32,734 INFO L231 Difference]: Finished difference. Result has 85 places, 124 transitions, 1182 flow [2023-08-27 08:20:32,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1182, PETRI_PLACES=85, PETRI_TRANSITIONS=124} [2023-08-27 08:20:32,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2023-08-27 08:20:32,735 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 124 transitions, 1182 flow [2023-08-27 08:20:32,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 116.57142857142857) internal successors, (816), 7 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:32,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:32,736 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:20:32,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 08:20:32,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-27 08:20:32,940 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:32,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:32,941 INFO L85 PathProgramCache]: Analyzing trace with hash 814084014, now seen corresponding path program 1 times [2023-08-27 08:20:32,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:32,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500158725] [2023-08-27 08:20:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:32,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:32,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:33,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:33,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500158725] [2023-08-27 08:20:33,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500158725] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:33,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409323696] [2023-08-27 08:20:33,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:33,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:33,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:20:33,053 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:20:33,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 08:20:33,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:33,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 08:20:33,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:20:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:33,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:20:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:33,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409323696] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:20:33,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:20:33,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-27 08:20:33,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568402238] [2023-08-27 08:20:33,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:20:33,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 08:20:33,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:33,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 08:20:33,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:20:33,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 315 [2023-08-27 08:20:33,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 124 transitions, 1182 flow. Second operand has 12 states, 12 states have (on average 128.5) internal successors, (1542), 12 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:33,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:33,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 315 [2023-08-27 08:20:33,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:33,940 INFO L124 PetriNetUnfolderBase]: 2307/3743 cut-off events. [2023-08-27 08:20:33,941 INFO L125 PetriNetUnfolderBase]: For 14097/14097 co-relation queries the response was YES. [2023-08-27 08:20:33,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16347 conditions, 3743 events. 2307/3743 cut-off events. For 14097/14097 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 21068 event pairs, 1351 based on Foata normal form. 90/3406 useless extension candidates. Maximal degree in co-relation 16315. Up to 2527 conditions per place. [2023-08-27 08:20:33,963 INFO L140 encePairwiseOnDemand]: 311/315 looper letters, 140 selfloop transitions, 8 changer transitions 1/151 dead transitions. [2023-08-27 08:20:33,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 151 transitions, 1481 flow [2023-08-27 08:20:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:20:33,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:20:33,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 967 transitions. [2023-08-27 08:20:33,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4385487528344671 [2023-08-27 08:20:33,966 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 967 transitions. [2023-08-27 08:20:33,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 967 transitions. [2023-08-27 08:20:33,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:33,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 967 transitions. [2023-08-27 08:20:33,969 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 138.14285714285714) internal successors, (967), 7 states have internal predecessors, (967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:33,971 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 315.0) internal successors, (2520), 8 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:33,971 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 315.0) internal successors, (2520), 8 states have internal predecessors, (2520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:33,971 INFO L175 Difference]: Start difference. First operand has 85 places, 124 transitions, 1182 flow. Second operand 7 states and 967 transitions. [2023-08-27 08:20:33,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 151 transitions, 1481 flow [2023-08-27 08:20:33,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 151 transitions, 1387 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-27 08:20:33,993 INFO L231 Difference]: Finished difference. Result has 84 places, 105 transitions, 900 flow [2023-08-27 08:20:33,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=884, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=900, PETRI_PLACES=84, PETRI_TRANSITIONS=105} [2023-08-27 08:20:33,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2023-08-27 08:20:33,994 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 105 transitions, 900 flow [2023-08-27 08:20:33,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 128.5) internal successors, (1542), 12 states have internal predecessors, (1542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:33,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:33,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:20:34,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 08:20:34,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-27 08:20:34,200 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:34,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:34,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1365146178, now seen corresponding path program 1 times [2023-08-27 08:20:34,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:34,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916063617] [2023-08-27 08:20:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:34,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:20:34,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:34,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916063617] [2023-08-27 08:20:34,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916063617] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:20:34,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:20:34,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:20:34,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434511572] [2023-08-27 08:20:34,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:20:34,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:20:34,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:34,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:20:34,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:20:34,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 315 [2023-08-27 08:20:34,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 105 transitions, 900 flow. Second operand has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:34,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:34,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 315 [2023-08-27 08:20:34,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:34,850 INFO L124 PetriNetUnfolderBase]: 3368/5461 cut-off events. [2023-08-27 08:20:34,850 INFO L125 PetriNetUnfolderBase]: For 19427/19427 co-relation queries the response was YES. [2023-08-27 08:20:34,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23358 conditions, 5461 events. 3368/5461 cut-off events. For 19427/19427 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 32673 event pairs, 1226 based on Foata normal form. 84/4953 useless extension candidates. Maximal degree in co-relation 23328. Up to 3642 conditions per place. [2023-08-27 08:20:34,882 INFO L140 encePairwiseOnDemand]: 310/315 looper letters, 142 selfloop transitions, 32 changer transitions 0/176 dead transitions. [2023-08-27 08:20:34,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 176 transitions, 1792 flow [2023-08-27 08:20:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:20:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:20:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 623 transitions. [2023-08-27 08:20:34,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49444444444444446 [2023-08-27 08:20:34,885 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 623 transitions. [2023-08-27 08:20:34,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 623 transitions. [2023-08-27 08:20:34,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:34,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 623 transitions. [2023-08-27 08:20:34,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:34,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:34,888 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 315.0) internal successors, (1575), 5 states have internal predecessors, (1575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:34,888 INFO L175 Difference]: Start difference. First operand has 84 places, 105 transitions, 900 flow. Second operand 4 states and 623 transitions. [2023-08-27 08:20:34,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 176 transitions, 1792 flow [2023-08-27 08:20:34,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 176 transitions, 1772 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-27 08:20:34,911 INFO L231 Difference]: Finished difference. Result has 84 places, 123 transitions, 1291 flow [2023-08-27 08:20:34,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=864, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1291, PETRI_PLACES=84, PETRI_TRANSITIONS=123} [2023-08-27 08:20:34,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2023-08-27 08:20:34,912 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 123 transitions, 1291 flow [2023-08-27 08:20:34,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:34,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:34,912 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:20:34,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-27 08:20:34,913 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:34,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:34,913 INFO L85 PathProgramCache]: Analyzing trace with hash 408868978, now seen corresponding path program 2 times [2023-08-27 08:20:34,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:34,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231034936] [2023-08-27 08:20:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:34,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:35,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:35,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:35,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231034936] [2023-08-27 08:20:35,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231034936] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:35,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599424488] [2023-08-27 08:20:35,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:20:35,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:35,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:20:35,553 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:20:35,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 08:20:35,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:20:35,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:20:35,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 08:20:35,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:20:36,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:36,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:20:36,437 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:20:36,438 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2023-08-27 08:20:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:36,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599424488] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:20:36,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:20:36,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-27 08:20:36,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343669693] [2023-08-27 08:20:36,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:20:36,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 08:20:36,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:36,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 08:20:36,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2023-08-27 08:20:36,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 315 [2023-08-27 08:20:36,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 123 transitions, 1291 flow. Second operand has 26 states, 26 states have (on average 109.73076923076923) internal successors, (2853), 26 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:36,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:36,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 315 [2023-08-27 08:20:36,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:41,258 INFO L124 PetriNetUnfolderBase]: 7658/12570 cut-off events. [2023-08-27 08:20:41,258 INFO L125 PetriNetUnfolderBase]: For 71218/71218 co-relation queries the response was YES. [2023-08-27 08:20:41,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57932 conditions, 12570 events. 7658/12570 cut-off events. For 71218/71218 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 87547 event pairs, 1892 based on Foata normal form. 122/11295 useless extension candidates. Maximal degree in co-relation 57901. Up to 7691 conditions per place. [2023-08-27 08:20:41,323 INFO L140 encePairwiseOnDemand]: 305/315 looper letters, 469 selfloop transitions, 150 changer transitions 1/622 dead transitions. [2023-08-27 08:20:41,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 622 transitions, 6050 flow [2023-08-27 08:20:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-27 08:20:41,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-27 08:20:41,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4572 transitions. [2023-08-27 08:20:41,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3819548872180451 [2023-08-27 08:20:41,333 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4572 transitions. [2023-08-27 08:20:41,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4572 transitions. [2023-08-27 08:20:41,337 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:41,337 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4572 transitions. [2023-08-27 08:20:41,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 120.3157894736842) internal successors, (4572), 38 states have internal predecessors, (4572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:41,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 315.0) internal successors, (12285), 39 states have internal predecessors, (12285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:41,363 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 315.0) internal successors, (12285), 39 states have internal predecessors, (12285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:41,363 INFO L175 Difference]: Start difference. First operand has 84 places, 123 transitions, 1291 flow. Second operand 38 states and 4572 transitions. [2023-08-27 08:20:41,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 622 transitions, 6050 flow [2023-08-27 08:20:41,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 622 transitions, 5820 flow, removed 115 selfloop flow, removed 0 redundant places. [2023-08-27 08:20:41,435 INFO L231 Difference]: Finished difference. Result has 142 places, 244 transitions, 3298 flow [2023-08-27 08:20:41,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=1249, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3298, PETRI_PLACES=142, PETRI_TRANSITIONS=244} [2023-08-27 08:20:41,435 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2023-08-27 08:20:41,435 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 244 transitions, 3298 flow [2023-08-27 08:20:41,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 109.73076923076923) internal successors, (2853), 26 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:41,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:41,437 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:20:41,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 08:20:41,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:41,643 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:41,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:41,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1791017121, now seen corresponding path program 1 times [2023-08-27 08:20:41,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:41,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412702304] [2023-08-27 08:20:41,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:41,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:41,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:42,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:42,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:42,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412702304] [2023-08-27 08:20:42,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412702304] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:42,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732274962] [2023-08-27 08:20:42,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:42,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:42,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:20:42,606 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:20:42,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 08:20:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:42,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 08:20:42,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:20:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:43,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:20:43,095 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:20:43,095 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-27 08:20:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:43,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732274962] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:20:43,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:20:43,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 26 [2023-08-27 08:20:43,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238514950] [2023-08-27 08:20:43,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:20:43,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:20:43,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:43,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:20:43,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2023-08-27 08:20:43,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 315 [2023-08-27 08:20:43,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 244 transitions, 3298 flow. Second operand has 28 states, 28 states have (on average 99.71428571428571) internal successors, (2792), 28 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:43,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:43,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 315 [2023-08-27 08:20:43,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:48,195 INFO L124 PetriNetUnfolderBase]: 9004/15286 cut-off events. [2023-08-27 08:20:48,196 INFO L125 PetriNetUnfolderBase]: For 167550/167734 co-relation queries the response was YES. [2023-08-27 08:20:48,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71418 conditions, 15286 events. 9004/15286 cut-off events. For 167550/167734 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 117401 event pairs, 1974 based on Foata normal form. 814/14326 useless extension candidates. Maximal degree in co-relation 71364. Up to 9646 conditions per place. [2023-08-27 08:20:48,360 INFO L140 encePairwiseOnDemand]: 303/315 looper letters, 461 selfloop transitions, 177 changer transitions 1/641 dead transitions. [2023-08-27 08:20:48,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 641 transitions, 6644 flow [2023-08-27 08:20:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-27 08:20:48,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-27 08:20:48,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3368 transitions. [2023-08-27 08:20:48,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3564021164021164 [2023-08-27 08:20:48,373 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3368 transitions. [2023-08-27 08:20:48,373 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3368 transitions. [2023-08-27 08:20:48,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:20:48,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3368 transitions. [2023-08-27 08:20:48,378 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 112.26666666666667) internal successors, (3368), 30 states have internal predecessors, (3368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:48,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 315.0) internal successors, (9765), 31 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:48,388 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 315.0) internal successors, (9765), 31 states have internal predecessors, (9765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:48,388 INFO L175 Difference]: Start difference. First operand has 142 places, 244 transitions, 3298 flow. Second operand 30 states and 3368 transitions. [2023-08-27 08:20:48,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 641 transitions, 6644 flow [2023-08-27 08:20:48,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 641 transitions, 6000 flow, removed 285 selfloop flow, removed 10 redundant places. [2023-08-27 08:20:48,705 INFO L231 Difference]: Finished difference. Result has 172 places, 282 transitions, 3681 flow [2023-08-27 08:20:48,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=2084, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3681, PETRI_PLACES=172, PETRI_TRANSITIONS=282} [2023-08-27 08:20:48,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2023-08-27 08:20:48,706 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 282 transitions, 3681 flow [2023-08-27 08:20:48,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 99.71428571428571) internal successors, (2792), 28 states have internal predecessors, (2792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:48,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:20:48,707 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:20:48,714 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 08:20:48,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:48,914 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:20:48,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:20:48,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1317162408, now seen corresponding path program 1 times [2023-08-27 08:20:48,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:20:48,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416880213] [2023-08-27 08:20:48,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:48,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:20:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:20:50,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:20:50,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416880213] [2023-08-27 08:20:50,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416880213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:20:50,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320194163] [2023-08-27 08:20:50,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:20:50,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:20:50,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:20:50,459 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:20:50,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 08:20:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:20:50,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 08:20:50,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:20:50,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:20:50,951 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-27 08:20:51,007 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:20:51,007 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:20:51,047 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_773 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_773) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2023-08-27 08:20:51,244 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:20:51,244 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 79 treesize of output 73 [2023-08-27 08:20:51,253 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 10 [2023-08-27 08:20:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:20:51,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320194163] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:20:51,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:20:51,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2023-08-27 08:20:51,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430885276] [2023-08-27 08:20:51,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:20:51,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:20:51,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:20:51,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:20:51,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=623, Unknown=3, NotChecked=50, Total=756 [2023-08-27 08:20:51,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 315 [2023-08-27 08:20:51,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 282 transitions, 3681 flow. Second operand has 28 states, 28 states have (on average 105.75) internal successors, (2961), 28 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:20:51,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:20:51,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 315 [2023-08-27 08:20:51,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:20:56,076 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 08:20:58,783 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 08:21:02,175 INFO L124 PetriNetUnfolderBase]: 13178/22157 cut-off events. [2023-08-27 08:21:02,176 INFO L125 PetriNetUnfolderBase]: For 222984/222984 co-relation queries the response was YES. [2023-08-27 08:21:02,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113215 conditions, 22157 events. 13178/22157 cut-off events. For 222984/222984 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 173722 event pairs, 4008 based on Foata normal form. 0/19632 useless extension candidates. Maximal degree in co-relation 113152. Up to 13667 conditions per place. [2023-08-27 08:21:02,316 INFO L140 encePairwiseOnDemand]: 297/315 looper letters, 431 selfloop transitions, 256 changer transitions 0/689 dead transitions. [2023-08-27 08:21:02,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 689 transitions, 9010 flow [2023-08-27 08:21:02,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 08:21:02,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 08:21:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3581 transitions. [2023-08-27 08:21:02,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3667178699436764 [2023-08-27 08:21:02,322 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3581 transitions. [2023-08-27 08:21:02,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3581 transitions. [2023-08-27 08:21:02,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:21:02,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3581 transitions. [2023-08-27 08:21:02,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 115.51612903225806) internal successors, (3581), 31 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:02,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 315.0) internal successors, (10080), 32 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:02,336 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 315.0) internal successors, (10080), 32 states have internal predecessors, (10080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:02,336 INFO L175 Difference]: Start difference. First operand has 172 places, 282 transitions, 3681 flow. Second operand 31 states and 3581 transitions. [2023-08-27 08:21:02,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 689 transitions, 9010 flow [2023-08-27 08:21:03,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 689 transitions, 7743 flow, removed 499 selfloop flow, removed 12 redundant places. [2023-08-27 08:21:03,321 INFO L231 Difference]: Finished difference. Result has 201 places, 428 transitions, 5927 flow [2023-08-27 08:21:03,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=3133, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=5927, PETRI_PLACES=201, PETRI_TRANSITIONS=428} [2023-08-27 08:21:03,321 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2023-08-27 08:21:03,321 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 428 transitions, 5927 flow [2023-08-27 08:21:03,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 105.75) internal successors, (2961), 28 states have internal predecessors, (2961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:03,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:21:03,322 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:21:03,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 08:21:03,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:21:03,525 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:21:03,525 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:21:03,525 INFO L85 PathProgramCache]: Analyzing trace with hash -451546491, now seen corresponding path program 2 times [2023-08-27 08:21:03,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:21:03,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465985156] [2023-08-27 08:21:03,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:21:03,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:21:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:21:04,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:21:04,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:21:04,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465985156] [2023-08-27 08:21:04,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465985156] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:21:04,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476283152] [2023-08-27 08:21:04,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:21:04,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:21:04,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:21:04,457 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:21:04,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 08:21:04,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:21:04,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:21:04,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-27 08:21:04,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:21:04,664 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-27 08:21:04,751 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2023-08-27 08:21:04,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:21:04,856 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-08-27 08:21:04,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:21:04,997 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-08-27 08:21:05,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:21:05,429 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 44 treesize of output 42 [2023-08-27 08:21:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:21:05,630 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:21:05,735 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_828 (Array Int Int))) (< 0 (+ |c_thread2Thread1of1ForFork1_~temp~0#1| 2147483649 c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_828) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))))) is different from false [2023-08-27 08:21:06,369 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:21:06,369 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 119 treesize of output 84 [2023-08-27 08:21:06,407 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:21:06,408 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2047 treesize of output 1876 [2023-08-27 08:21:06,430 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 211 treesize of output 183 [2023-08-27 08:21:06,457 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:21:06,458 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 250 treesize of output 216 [2023-08-27 08:21:06,481 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:21:06,483 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 135 treesize of output 127 [2023-08-27 08:21:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:21:08,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476283152] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:21:08,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:21:08,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 08:21:08,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497354570] [2023-08-27 08:21:08,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:21:08,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 08:21:08,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:21:08,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 08:21:08,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=813, Unknown=6, NotChecked=58, Total=992 [2023-08-27 08:21:08,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 315 [2023-08-27 08:21:08,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 428 transitions, 5927 flow. Second operand has 32 states, 32 states have (on average 99.5) internal successors, (3184), 32 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:08,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:21:08,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 315 [2023-08-27 08:21:08,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:21:14,476 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 08:21:16,503 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:21:20,714 WARN L539 Checker$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 08:21:22,724 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 08:21:27,742 INFO L124 PetriNetUnfolderBase]: 14299/24023 cut-off events. [2023-08-27 08:21:27,742 INFO L125 PetriNetUnfolderBase]: For 286424/286758 co-relation queries the response was YES. [2023-08-27 08:21:27,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160175 conditions, 24023 events. 14299/24023 cut-off events. For 286424/286758 co-relation queries the response was YES. Maximal size of possible extension queue 1256. Compared 193361 event pairs, 6243 based on Foata normal form. 76/21374 useless extension candidates. Maximal degree in co-relation 160107. Up to 14797 conditions per place. [2023-08-27 08:21:27,945 INFO L140 encePairwiseOnDemand]: 298/315 looper letters, 526 selfloop transitions, 180 changer transitions 1/709 dead transitions. [2023-08-27 08:21:27,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 709 transitions, 10167 flow [2023-08-27 08:21:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 08:21:27,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 08:21:27,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3147 transitions. [2023-08-27 08:21:27,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3444991789819376 [2023-08-27 08:21:27,948 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3147 transitions. [2023-08-27 08:21:27,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3147 transitions. [2023-08-27 08:21:27,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:21:27,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3147 transitions. [2023-08-27 08:21:27,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 108.51724137931035) internal successors, (3147), 29 states have internal predecessors, (3147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:27,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 315.0) internal successors, (9450), 30 states have internal predecessors, (9450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:27,960 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 315.0) internal successors, (9450), 30 states have internal predecessors, (9450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:27,960 INFO L175 Difference]: Start difference. First operand has 201 places, 428 transitions, 5927 flow. Second operand 29 states and 3147 transitions. [2023-08-27 08:21:27,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 709 transitions, 10167 flow [2023-08-27 08:21:29,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 709 transitions, 9324 flow, removed 403 selfloop flow, removed 6 redundant places. [2023-08-27 08:21:29,911 INFO L231 Difference]: Finished difference. Result has 237 places, 490 transitions, 6764 flow [2023-08-27 08:21:29,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=5091, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=6764, PETRI_PLACES=237, PETRI_TRANSITIONS=490} [2023-08-27 08:21:29,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2023-08-27 08:21:29,912 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 490 transitions, 6764 flow [2023-08-27 08:21:29,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 99.5) internal successors, (3184), 32 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:29,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:21:29,913 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:21:29,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 08:21:30,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-27 08:21:30,113 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:21:30,114 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:21:30,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1792408341, now seen corresponding path program 2 times [2023-08-27 08:21:30,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:21:30,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011224041] [2023-08-27 08:21:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:21:30,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:21:30,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:21:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:21:31,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:21:31,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011224041] [2023-08-27 08:21:31,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011224041] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:21:31,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104564751] [2023-08-27 08:21:31,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:21:31,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:21:31,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:21:31,548 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:21:31,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 08:21:31,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:21:31,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:21:31,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 08:21:31,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:21:31,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:21:31,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:21:31,888 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 08:21:31,888 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-08-27 08:21:31,910 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:21:31,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104564751] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:21:31,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:21:31,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 18 [2023-08-27 08:21:31,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442155453] [2023-08-27 08:21:31,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:21:31,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:21:31,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:21:31,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:21:31,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-08-27 08:21:31,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 315 [2023-08-27 08:21:31,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 490 transitions, 6764 flow. Second operand has 20 states, 20 states have (on average 102.7) internal successors, (2054), 20 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:31,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:21:31,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 315 [2023-08-27 08:21:31,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:21:38,548 INFO L124 PetriNetUnfolderBase]: 16962/28498 cut-off events. [2023-08-27 08:21:38,548 INFO L125 PetriNetUnfolderBase]: For 402046/402142 co-relation queries the response was YES. [2023-08-27 08:21:38,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210299 conditions, 28498 events. 16962/28498 cut-off events. For 402046/402142 co-relation queries the response was YES. Maximal size of possible extension queue 1428. Compared 233893 event pairs, 5247 based on Foata normal form. 91/25310 useless extension candidates. Maximal degree in co-relation 210217. Up to 16714 conditions per place. [2023-08-27 08:21:38,876 INFO L140 encePairwiseOnDemand]: 305/315 looper letters, 477 selfloop transitions, 428 changer transitions 0/907 dead transitions. [2023-08-27 08:21:38,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 907 transitions, 13610 flow [2023-08-27 08:21:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 08:21:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 08:21:38,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2255 transitions. [2023-08-27 08:21:38,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35793650793650794 [2023-08-27 08:21:38,879 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2255 transitions. [2023-08-27 08:21:38,879 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2255 transitions. [2023-08-27 08:21:38,880 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:21:38,880 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2255 transitions. [2023-08-27 08:21:38,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 112.75) internal successors, (2255), 20 states have internal predecessors, (2255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:38,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 315.0) internal successors, (6615), 21 states have internal predecessors, (6615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:38,887 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 315.0) internal successors, (6615), 21 states have internal predecessors, (6615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:38,887 INFO L175 Difference]: Start difference. First operand has 237 places, 490 transitions, 6764 flow. Second operand 20 states and 2255 transitions. [2023-08-27 08:21:38,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 907 transitions, 13610 flow [2023-08-27 08:21:40,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 907 transitions, 12979 flow, removed 276 selfloop flow, removed 10 redundant places. [2023-08-27 08:21:40,879 INFO L231 Difference]: Finished difference. Result has 253 places, 650 transitions, 9972 flow [2023-08-27 08:21:40,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=6228, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=9972, PETRI_PLACES=253, PETRI_TRANSITIONS=650} [2023-08-27 08:21:40,880 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2023-08-27 08:21:40,880 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 650 transitions, 9972 flow [2023-08-27 08:21:40,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 102.7) internal successors, (2054), 20 states have internal predecessors, (2054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:40,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:21:40,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:21:40,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 08:21:41,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:21:41,085 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:21:41,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:21:41,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1493265186, now seen corresponding path program 2 times [2023-08-27 08:21:41,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:21:41,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909421362] [2023-08-27 08:21:41,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:21:41,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:21:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:21:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:21:41,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:21:41,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909421362] [2023-08-27 08:21:41,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909421362] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:21:41,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151315717] [2023-08-27 08:21:41,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:21:41,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:21:41,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:21:41,929 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:21:41,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 08:21:42,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:21:42,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:21:42,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-27 08:21:42,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:21:42,253 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-27 08:21:42,318 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 08:21:42,378 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:21:42,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:21:42,516 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 08:21:42,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:21:42,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-27 08:21:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:21:42,944 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:21:43,997 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:21:43,997 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 152 treesize of output 97 [2023-08-27 08:21:44,052 INFO L322 Elim1Store]: treesize reduction 18, result has 60.0 percent of original size [2023-08-27 08:21:44,053 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1018 treesize of output 931 [2023-08-27 08:21:44,074 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:21:44,074 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:21:44,082 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:21:44,083 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 263 treesize of output 223 [2023-08-27 08:21:44,100 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:21:44,102 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:21:44,121 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:21:44,121 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 166 treesize of output 161 [2023-08-27 08:21:44,136 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 142 treesize of output 118 [2023-08-27 08:21:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:21:45,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151315717] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:21:45,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:21:45,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 08:21:45,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159669997] [2023-08-27 08:21:45,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:21:45,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 08:21:45,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:21:45,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 08:21:45,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=801, Unknown=4, NotChecked=0, Total=992 [2023-08-27 08:21:45,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 315 [2023-08-27 08:21:45,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 650 transitions, 9972 flow. Second operand has 32 states, 32 states have (on average 99.5) internal successors, (3184), 32 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:45,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:21:45,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 315 [2023-08-27 08:21:45,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:21:55,629 INFO L124 PetriNetUnfolderBase]: 17585/29653 cut-off events. [2023-08-27 08:21:55,630 INFO L125 PetriNetUnfolderBase]: For 436017/436089 co-relation queries the response was YES. [2023-08-27 08:21:55,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 222948 conditions, 29653 events. 17585/29653 cut-off events. For 436017/436089 co-relation queries the response was YES. Maximal size of possible extension queue 1465. Compared 245252 event pairs, 6789 based on Foata normal form. 63/26401 useless extension candidates. Maximal degree in co-relation 222861. Up to 17247 conditions per place. [2023-08-27 08:21:55,968 INFO L140 encePairwiseOnDemand]: 304/315 looper letters, 696 selfloop transitions, 213 changer transitions 3/914 dead transitions. [2023-08-27 08:21:55,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 914 transitions, 14607 flow [2023-08-27 08:21:55,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 08:21:55,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 08:21:55,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3445 transitions. [2023-08-27 08:21:55,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.341765873015873 [2023-08-27 08:21:55,974 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3445 transitions. [2023-08-27 08:21:55,974 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3445 transitions. [2023-08-27 08:21:55,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:21:55,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3445 transitions. [2023-08-27 08:21:55,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 107.65625) internal successors, (3445), 32 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:55,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 315.0) internal successors, (10395), 33 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:55,987 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 315.0) internal successors, (10395), 33 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:55,987 INFO L175 Difference]: Start difference. First operand has 253 places, 650 transitions, 9972 flow. Second operand 32 states and 3445 transitions. [2023-08-27 08:21:55,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 914 transitions, 14607 flow [2023-08-27 08:21:59,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 914 transitions, 13754 flow, removed 400 selfloop flow, removed 8 redundant places. [2023-08-27 08:21:59,334 INFO L231 Difference]: Finished difference. Result has 288 places, 678 transitions, 10223 flow [2023-08-27 08:21:59,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=9122, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10223, PETRI_PLACES=288, PETRI_TRANSITIONS=678} [2023-08-27 08:21:59,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2023-08-27 08:21:59,335 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 678 transitions, 10223 flow [2023-08-27 08:21:59,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 99.5) internal successors, (3184), 32 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:21:59,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:21:59,336 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:21:59,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-27 08:21:59,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:21:59,541 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:21:59,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:21:59,541 INFO L85 PathProgramCache]: Analyzing trace with hash -143508346, now seen corresponding path program 3 times [2023-08-27 08:21:59,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:21:59,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584041983] [2023-08-27 08:21:59,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:21:59,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:21:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:22:00,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:22:00,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:22:00,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584041983] [2023-08-27 08:22:00,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584041983] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:22:00,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550026648] [2023-08-27 08:22:00,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:22:00,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:22:00,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:22:00,269 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:22:00,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-27 08:22:00,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:22:00,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:22:00,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 08:22:00,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:22:00,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:22:00,695 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 08:22:00,773 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2023-08-27 08:22:00,918 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:22:00,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:22:00,992 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:22:00,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-27 08:22:01,432 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:22:01,433 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 84 treesize of output 76 [2023-08-27 08:22:01,439 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 63 treesize of output 57 [2023-08-27 08:22:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:22:01,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550026648] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:22:01,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:22:01,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-27 08:22:01,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201362166] [2023-08-27 08:22:01,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:22:01,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 08:22:01,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:22:01,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 08:22:01,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=697, Unknown=1, NotChecked=0, Total=812 [2023-08-27 08:22:01,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 315 [2023-08-27 08:22:01,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 678 transitions, 10223 flow. Second operand has 29 states, 29 states have (on average 105.65517241379311) internal successors, (3064), 29 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:01,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:22:01,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 315 [2023-08-27 08:22:01,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:22:12,095 INFO L124 PetriNetUnfolderBase]: 18343/31135 cut-off events. [2023-08-27 08:22:12,096 INFO L125 PetriNetUnfolderBase]: For 422603/422651 co-relation queries the response was YES. [2023-08-27 08:22:12,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231055 conditions, 31135 events. 18343/31135 cut-off events. For 422603/422651 co-relation queries the response was YES. Maximal size of possible extension queue 1570. Compared 261225 event pairs, 5104 based on Foata normal form. 0/27716 useless extension candidates. Maximal degree in co-relation 230959. Up to 18238 conditions per place. [2023-08-27 08:22:12,535 INFO L140 encePairwiseOnDemand]: 304/315 looper letters, 736 selfloop transitions, 259 changer transitions 8/1005 dead transitions. [2023-08-27 08:22:12,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 1005 transitions, 15369 flow [2023-08-27 08:22:12,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 08:22:12,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 08:22:12,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3689 transitions. [2023-08-27 08:22:12,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3659722222222222 [2023-08-27 08:22:12,635 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3689 transitions. [2023-08-27 08:22:12,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3689 transitions. [2023-08-27 08:22:12,636 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:22:12,636 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3689 transitions. [2023-08-27 08:22:12,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 115.28125) internal successors, (3689), 32 states have internal predecessors, (3689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:12,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 315.0) internal successors, (10395), 33 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:12,645 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 315.0) internal successors, (10395), 33 states have internal predecessors, (10395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:12,645 INFO L175 Difference]: Start difference. First operand has 288 places, 678 transitions, 10223 flow. Second operand 32 states and 3689 transitions. [2023-08-27 08:22:12,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 1005 transitions, 15369 flow [2023-08-27 08:22:15,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 1005 transitions, 14931 flow, removed 95 selfloop flow, removed 14 redundant places. [2023-08-27 08:22:15,106 INFO L231 Difference]: Finished difference. Result has 313 places, 699 transitions, 10935 flow [2023-08-27 08:22:15,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=9777, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=10935, PETRI_PLACES=313, PETRI_TRANSITIONS=699} [2023-08-27 08:22:15,107 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2023-08-27 08:22:15,107 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 699 transitions, 10935 flow [2023-08-27 08:22:15,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 105.65517241379311) internal successors, (3064), 29 states have internal predecessors, (3064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:15,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:22:15,108 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:22:15,112 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-27 08:22:15,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:22:15,308 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:22:15,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:22:15,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1123080032, now seen corresponding path program 3 times [2023-08-27 08:22:15,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:22:15,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586598234] [2023-08-27 08:22:15,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:22:15,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:22:15,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:22:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:22:15,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:22:15,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586598234] [2023-08-27 08:22:15,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586598234] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:22:15,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626469096] [2023-08-27 08:22:15,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:22:15,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:22:15,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:22:15,865 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:22:15,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-27 08:22:15,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:22:15,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:22:15,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 08:22:15,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:22:16,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:22:16,415 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:22:16,666 INFO L322 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2023-08-27 08:22:16,667 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 43 [2023-08-27 08:22:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:22:17,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626469096] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:22:17,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:22:17,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-27 08:22:17,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990283256] [2023-08-27 08:22:17,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:22:17,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 08:22:17,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:22:17,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 08:22:17,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2023-08-27 08:22:17,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 315 [2023-08-27 08:22:17,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 699 transitions, 10935 flow. Second operand has 26 states, 26 states have (on average 109.73076923076923) internal successors, (2853), 26 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:17,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:22:17,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 315 [2023-08-27 08:22:17,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:22:25,385 INFO L124 PetriNetUnfolderBase]: 18548/31095 cut-off events. [2023-08-27 08:22:25,385 INFO L125 PetriNetUnfolderBase]: For 443911/445043 co-relation queries the response was YES. [2023-08-27 08:22:25,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 237453 conditions, 31095 events. 18548/31095 cut-off events. For 443911/445043 co-relation queries the response was YES. Maximal size of possible extension queue 1648. Compared 260642 event pairs, 11184 based on Foata normal form. 41/27496 useless extension candidates. Maximal degree in co-relation 237351. Up to 23192 conditions per place. [2023-08-27 08:22:25,833 INFO L140 encePairwiseOnDemand]: 305/315 looper letters, 702 selfloop transitions, 153 changer transitions 0/857 dead transitions. [2023-08-27 08:22:25,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 857 transitions, 14043 flow [2023-08-27 08:22:25,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 08:22:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 08:22:25,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2032 transitions. [2023-08-27 08:22:25,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794584500466853 [2023-08-27 08:22:25,836 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2032 transitions. [2023-08-27 08:22:25,836 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2032 transitions. [2023-08-27 08:22:25,836 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:22:25,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2032 transitions. [2023-08-27 08:22:25,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 119.52941176470588) internal successors, (2032), 17 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:25,842 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 315.0) internal successors, (5670), 18 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:25,842 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 315.0) internal successors, (5670), 18 states have internal predecessors, (5670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:25,842 INFO L175 Difference]: Start difference. First operand has 313 places, 699 transitions, 10935 flow. Second operand 17 states and 2032 transitions. [2023-08-27 08:22:25,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 857 transitions, 14043 flow [2023-08-27 08:22:28,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 857 transitions, 13649 flow, removed 152 selfloop flow, removed 10 redundant places. [2023-08-27 08:22:28,550 INFO L231 Difference]: Finished difference. Result has 320 places, 703 transitions, 11007 flow [2023-08-27 08:22:28,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=10521, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=11007, PETRI_PLACES=320, PETRI_TRANSITIONS=703} [2023-08-27 08:22:28,551 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2023-08-27 08:22:28,551 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 703 transitions, 11007 flow [2023-08-27 08:22:28,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 109.73076923076923) internal successors, (2853), 26 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:28,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:22:28,552 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:22:28,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-08-27 08:22:28,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 08:22:28,756 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:22:28,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:22:28,757 INFO L85 PathProgramCache]: Analyzing trace with hash 735245760, now seen corresponding path program 4 times [2023-08-27 08:22:28,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:22:28,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062693464] [2023-08-27 08:22:28,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:22:28,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:22:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:22:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:22:29,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:22:29,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062693464] [2023-08-27 08:22:29,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062693464] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:22:29,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700407300] [2023-08-27 08:22:29,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:22:29,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:22:29,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:22:29,748 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:22:29,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-27 08:22:29,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:22:29,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:22:29,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 08:22:29,859 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:22:29,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:22:29,989 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 08:22:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:22:30,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:22:30,348 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:22:30,349 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 100 [2023-08-27 08:22:30,370 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:22:30,371 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 47 [2023-08-27 08:22:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:22:30,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700407300] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:22:30,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:22:30,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2023-08-27 08:22:30,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109385468] [2023-08-27 08:22:30,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:22:30,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 08:22:30,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:22:30,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 08:22:30,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=569, Unknown=2, NotChecked=0, Total=650 [2023-08-27 08:22:30,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 315 [2023-08-27 08:22:30,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 703 transitions, 11007 flow. Second operand has 26 states, 26 states have (on average 102.6923076923077) internal successors, (2670), 26 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:30,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:22:30,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 315 [2023-08-27 08:22:30,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:22:33,579 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 08:22:35,597 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 08:22:42,934 INFO L124 PetriNetUnfolderBase]: 19458/32751 cut-off events. [2023-08-27 08:22:42,935 INFO L125 PetriNetUnfolderBase]: For 458724/459452 co-relation queries the response was YES. [2023-08-27 08:22:43,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248225 conditions, 32751 events. 19458/32751 cut-off events. For 458724/459452 co-relation queries the response was YES. Maximal size of possible extension queue 1666. Compared 274339 event pairs, 8545 based on Foata normal form. 34/28990 useless extension candidates. Maximal degree in co-relation 248121. Up to 26207 conditions per place. [2023-08-27 08:22:43,432 INFO L140 encePairwiseOnDemand]: 305/315 looper letters, 670 selfloop transitions, 277 changer transitions 0/949 dead transitions. [2023-08-27 08:22:43,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 949 transitions, 15882 flow [2023-08-27 08:22:43,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 08:22:43,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 08:22:43,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2327 transitions. [2023-08-27 08:22:43,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35177626606198037 [2023-08-27 08:22:43,435 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2327 transitions. [2023-08-27 08:22:43,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2327 transitions. [2023-08-27 08:22:43,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:22:43,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2327 transitions. [2023-08-27 08:22:43,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 110.80952380952381) internal successors, (2327), 21 states have internal predecessors, (2327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:43,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 315.0) internal successors, (6930), 22 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:43,442 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 315.0) internal successors, (6930), 22 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:43,442 INFO L175 Difference]: Start difference. First operand has 320 places, 703 transitions, 11007 flow. Second operand 21 states and 2327 transitions. [2023-08-27 08:22:43,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 949 transitions, 15882 flow [2023-08-27 08:22:46,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 949 transitions, 15667 flow, removed 36 selfloop flow, removed 10 redundant places. [2023-08-27 08:22:46,143 INFO L231 Difference]: Finished difference. Result has 340 places, 761 transitions, 12732 flow [2023-08-27 08:22:46,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=10723, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=12732, PETRI_PLACES=340, PETRI_TRANSITIONS=761} [2023-08-27 08:22:46,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2023-08-27 08:22:46,144 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 761 transitions, 12732 flow [2023-08-27 08:22:46,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 102.6923076923077) internal successors, (2670), 26 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:46,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:22:46,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:22:46,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-27 08:22:46,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-27 08:22:46,345 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:22:46,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:22:46,345 INFO L85 PathProgramCache]: Analyzing trace with hash -7892027, now seen corresponding path program 3 times [2023-08-27 08:22:46,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:22:46,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299724841] [2023-08-27 08:22:46,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:22:46,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:22:46,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:22:47,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:22:47,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:22:47,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299724841] [2023-08-27 08:22:47,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299724841] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:22:47,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051789698] [2023-08-27 08:22:47,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:22:47,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:22:47,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:22:47,252 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:22:47,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-27 08:22:47,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:22:47,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:22:47,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-27 08:22:47,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:22:47,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:22:47,545 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:22:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 08:22:47,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:22:47,701 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:22:47,701 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 38 [2023-08-27 08:22:47,705 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 08:22:47,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 08:22:47,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051789698] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:22:47,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:22:47,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 23 [2023-08-27 08:22:47,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277579318] [2023-08-27 08:22:47,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:22:47,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 08:22:47,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:22:47,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 08:22:47,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=530, Unknown=2, NotChecked=0, Total=600 [2023-08-27 08:22:47,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 315 [2023-08-27 08:22:47,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 761 transitions, 12732 flow. Second operand has 25 states, 25 states have (on average 99.88) internal successors, (2497), 25 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:47,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:22:47,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 315 [2023-08-27 08:22:47,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:22:57,527 INFO L124 PetriNetUnfolderBase]: 20542/34562 cut-off events. [2023-08-27 08:22:57,527 INFO L125 PetriNetUnfolderBase]: For 540730/540730 co-relation queries the response was YES. [2023-08-27 08:22:58,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265800 conditions, 34562 events. 20542/34562 cut-off events. For 540730/540730 co-relation queries the response was YES. Maximal size of possible extension queue 1723. Compared 290262 event pairs, 4120 based on Foata normal form. 81/30834 useless extension candidates. Maximal degree in co-relation 265686. Up to 20017 conditions per place. [2023-08-27 08:22:58,301 INFO L140 encePairwiseOnDemand]: 303/315 looper letters, 612 selfloop transitions, 408 changer transitions 2/1024 dead transitions. [2023-08-27 08:22:58,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1024 transitions, 17480 flow [2023-08-27 08:22:58,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 08:22:58,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 08:22:58,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 2332 transitions. [2023-08-27 08:22:58,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3525321239606954 [2023-08-27 08:22:58,304 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 2332 transitions. [2023-08-27 08:22:58,304 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 2332 transitions. [2023-08-27 08:22:58,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:22:58,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 2332 transitions. [2023-08-27 08:22:58,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 111.04761904761905) internal successors, (2332), 21 states have internal predecessors, (2332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:58,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 315.0) internal successors, (6930), 22 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:58,312 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 315.0) internal successors, (6930), 22 states have internal predecessors, (6930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:22:58,312 INFO L175 Difference]: Start difference. First operand has 340 places, 761 transitions, 12732 flow. Second operand 21 states and 2332 transitions. [2023-08-27 08:22:58,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1024 transitions, 17480 flow [2023-08-27 08:23:01,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1024 transitions, 17047 flow, removed 162 selfloop flow, removed 7 redundant places. [2023-08-27 08:23:01,785 INFO L231 Difference]: Finished difference. Result has 355 places, 790 transitions, 13948 flow [2023-08-27 08:23:01,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=12266, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=382, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=13948, PETRI_PLACES=355, PETRI_TRANSITIONS=790} [2023-08-27 08:23:01,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2023-08-27 08:23:01,791 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 790 transitions, 13948 flow [2023-08-27 08:23:01,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 99.88) internal successors, (2497), 25 states have internal predecessors, (2497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:23:01,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:23:01,792 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:23:01,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-27 08:23:01,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-27 08:23:01,992 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:23:01,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:23:01,993 INFO L85 PathProgramCache]: Analyzing trace with hash 163288705, now seen corresponding path program 3 times [2023-08-27 08:23:01,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:23:01,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595603707] [2023-08-27 08:23:01,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:23:01,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:23:02,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:23:02,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:23:02,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:23:02,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595603707] [2023-08-27 08:23:02,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595603707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:23:02,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18317741] [2023-08-27 08:23:02,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:23:02,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:23:02,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:23:02,752 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:23:02,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-27 08:23:02,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:23:02,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:23:02,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 08:23:02,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:23:03,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:23:03,113 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:23:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:23:03,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:23:03,521 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:23:03,521 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 08:23:03,526 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 15 treesize of output 9 [2023-08-27 08:23:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:23:03,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18317741] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:23:03,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:23:03,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-27 08:23:03,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873307777] [2023-08-27 08:23:03,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:23:03,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 08:23:03,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:23:03,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 08:23:03,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=670, Unknown=1, NotChecked=0, Total=812 [2023-08-27 08:23:03,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 315 [2023-08-27 08:23:03,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 790 transitions, 13948 flow. Second operand has 29 states, 29 states have (on average 102.55172413793103) internal successors, (2974), 29 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:23:03,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:23:03,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 315 [2023-08-27 08:23:03,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:23:17,417 INFO L124 PetriNetUnfolderBase]: 21399/36424 cut-off events. [2023-08-27 08:23:17,417 INFO L125 PetriNetUnfolderBase]: For 586885/587029 co-relation queries the response was YES. [2023-08-27 08:23:17,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283289 conditions, 36424 events. 21399/36424 cut-off events. For 586885/587029 co-relation queries the response was YES. Maximal size of possible extension queue 1880. Compared 313729 event pairs, 7799 based on Foata normal form. 224/32701 useless extension candidates. Maximal degree in co-relation 283173. Up to 21344 conditions per place. [2023-08-27 08:23:18,061 INFO L140 encePairwiseOnDemand]: 306/315 looper letters, 800 selfloop transitions, 294 changer transitions 5/1101 dead transitions. [2023-08-27 08:23:18,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1101 transitions, 19104 flow [2023-08-27 08:23:18,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 08:23:18,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 08:23:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3800 transitions. [2023-08-27 08:23:18,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35480859010270777 [2023-08-27 08:23:18,065 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3800 transitions. [2023-08-27 08:23:18,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3800 transitions. [2023-08-27 08:23:18,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:23:18,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3800 transitions. [2023-08-27 08:23:18,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 111.76470588235294) internal successors, (3800), 34 states have internal predecessors, (3800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:23:18,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 315.0) internal successors, (11025), 35 states have internal predecessors, (11025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:23:18,077 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 315.0) internal successors, (11025), 35 states have internal predecessors, (11025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:23:18,078 INFO L175 Difference]: Start difference. First operand has 355 places, 790 transitions, 13948 flow. Second operand 34 states and 3800 transitions. [2023-08-27 08:23:18,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1101 transitions, 19104 flow [2023-08-27 08:23:22,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1101 transitions, 18491 flow, removed 138 selfloop flow, removed 13 redundant places. [2023-08-27 08:23:22,214 INFO L231 Difference]: Finished difference. Result has 377 places, 809 transitions, 14301 flow [2023-08-27 08:23:22,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=13243, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=784, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=14301, PETRI_PLACES=377, PETRI_TRANSITIONS=809} [2023-08-27 08:23:22,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2023-08-27 08:23:22,216 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 809 transitions, 14301 flow [2023-08-27 08:23:22,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 102.55172413793103) internal successors, (2974), 29 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:23:22,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:23:22,217 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:23:22,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-27 08:23:22,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:23:22,421 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:23:22,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:23:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash -441554282, now seen corresponding path program 4 times [2023-08-27 08:23:22,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:23:22,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471073726] [2023-08-27 08:23:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:23:22,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:23:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:23:23,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:23:23,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:23:23,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471073726] [2023-08-27 08:23:23,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471073726] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:23:23,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325986740] [2023-08-27 08:23:23,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:23:23,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:23:23,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:23:23,750 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:23:23,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-27 08:23:23,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:23:23,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:23:23,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 08:23:23,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:23:24,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:23:24,093 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:23:24,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:23:24,157 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:23:24,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:23:24,313 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:23:24,538 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1217 (Array Int Int)) (v_ArrVal_1216 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1216) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1217) c_~queue~0.base))) (or (< (let ((.cse1 (* c_~front~0 4))) (+ c_~d~0 (select .cse0 (+ c_~queue~0.offset .cse1)) (select .cse0 (+ c_~queue~0.offset .cse1 4)))) 2147483648) (not (= (select .cse0 (+ c_~queue~0.offset (* c_~back~0 4))) 1))))) is different from false [2023-08-27 08:23:24,574 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:23:24,574 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 404 treesize of output 380 [2023-08-27 08:23:24,598 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:23:24,598 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 108 treesize of output 106 [2023-08-27 08:23:24,615 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:23:24,615 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 113 treesize of output 91 [2023-08-27 08:23:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 1 not checked. [2023-08-27 08:23:25,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325986740] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:23:25,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:23:25,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 29 [2023-08-27 08:23:25,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447971962] [2023-08-27 08:23:25,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:23:25,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 08:23:25,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:23:25,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 08:23:25,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=762, Unknown=5, NotChecked=56, Total=930 [2023-08-27 08:23:25,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 315 [2023-08-27 08:23:25,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 809 transitions, 14301 flow. Second operand has 31 states, 31 states have (on average 102.58064516129032) internal successors, (3180), 31 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:23:25,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:23:25,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 315 [2023-08-27 08:23:25,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:23:28,736 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 08:23:30,838 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:23:33,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:23:36,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:23:39,024 WARN L539 Checker$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 08:23:43,506 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 08:23:53,372 INFO L124 PetriNetUnfolderBase]: 27656/46438 cut-off events. [2023-08-27 08:23:53,372 INFO L125 PetriNetUnfolderBase]: For 834621/834741 co-relation queries the response was YES. [2023-08-27 08:23:54,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 369633 conditions, 46438 events. 27656/46438 cut-off events. For 834621/834741 co-relation queries the response was YES. Maximal size of possible extension queue 2454. Compared 403485 event pairs, 6110 based on Foata normal form. 250/41780 useless extension candidates. Maximal degree in co-relation 369516. Up to 27169 conditions per place. [2023-08-27 08:23:54,257 INFO L140 encePairwiseOnDemand]: 300/315 looper letters, 688 selfloop transitions, 704 changer transitions 0/1394 dead transitions. [2023-08-27 08:23:54,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 1394 transitions, 24983 flow [2023-08-27 08:23:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 08:23:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 08:23:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4083 transitions. [2023-08-27 08:23:54,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36005291005291007 [2023-08-27 08:23:54,261 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4083 transitions. [2023-08-27 08:23:54,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4083 transitions. [2023-08-27 08:23:54,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:23:54,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4083 transitions. [2023-08-27 08:23:54,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 113.41666666666667) internal successors, (4083), 36 states have internal predecessors, (4083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:23:54,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 315.0) internal successors, (11655), 37 states have internal predecessors, (11655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:23:54,273 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 315.0) internal successors, (11655), 37 states have internal predecessors, (11655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:23:54,273 INFO L175 Difference]: Start difference. First operand has 377 places, 809 transitions, 14301 flow. Second operand 36 states and 4083 transitions. [2023-08-27 08:23:54,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 1394 transitions, 24983 flow [2023-08-27 08:23:59,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 1394 transitions, 24379 flow, removed 73 selfloop flow, removed 20 redundant places. [2023-08-27 08:23:59,837 INFO L231 Difference]: Finished difference. Result has 409 places, 1033 transitions, 20490 flow [2023-08-27 08:23:59,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=13719, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=806, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=512, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=20490, PETRI_PLACES=409, PETRI_TRANSITIONS=1033} [2023-08-27 08:23:59,839 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2023-08-27 08:23:59,839 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 1033 transitions, 20490 flow [2023-08-27 08:23:59,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 102.58064516129032) internal successors, (3180), 31 states have internal predecessors, (3180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:23:59,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:23:59,839 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:23:59,845 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-27 08:24:00,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:24:00,044 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:24:00,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:24:00,045 INFO L85 PathProgramCache]: Analyzing trace with hash 706881931, now seen corresponding path program 1 times [2023-08-27 08:24:00,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:24:00,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392322687] [2023-08-27 08:24:00,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:24:00,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:24:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:24:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:24:00,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:24:00,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392322687] [2023-08-27 08:24:00,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392322687] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:24:00,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757911901] [2023-08-27 08:24:00,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:24:00,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:24:00,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:24:00,785 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:24:00,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-27 08:24:00,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:24:00,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 08:24:00,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:24:01,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:24:01,310 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:24:01,359 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:24:01,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:24:01,444 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:24:01,445 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 08:24:01,451 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 08:24:01,802 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:24:01,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757911901] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:24:01,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:24:01,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-27 08:24:01,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372836554] [2023-08-27 08:24:01,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:24:01,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 08:24:01,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:24:01,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 08:24:01,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=689, Unknown=2, NotChecked=0, Total=812 [2023-08-27 08:24:01,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 315 [2023-08-27 08:24:01,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 1033 transitions, 20490 flow. Second operand has 29 states, 29 states have (on average 105.75862068965517) internal successors, (3067), 29 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:24:01,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:24:01,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 315 [2023-08-27 08:24:01,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:24:09,657 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 08:24:25,466 INFO L124 PetriNetUnfolderBase]: 32796/54878 cut-off events. [2023-08-27 08:24:25,466 INFO L125 PetriNetUnfolderBase]: For 1474405/1474495 co-relation queries the response was YES. [2023-08-27 08:24:26,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 508033 conditions, 54878 events. 32796/54878 cut-off events. For 1474405/1474495 co-relation queries the response was YES. Maximal size of possible extension queue 2655. Compared 484479 event pairs, 9922 based on Foata normal form. 203/54381 useless extension candidates. Maximal degree in co-relation 507906. Up to 31978 conditions per place. [2023-08-27 08:24:26,692 INFO L140 encePairwiseOnDemand]: 305/315 looper letters, 1218 selfloop transitions, 395 changer transitions 7/1622 dead transitions. [2023-08-27 08:24:26,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 1622 transitions, 31365 flow [2023-08-27 08:24:26,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 08:24:26,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 08:24:26,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 4319 transitions. [2023-08-27 08:24:26,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3705705705705706 [2023-08-27 08:24:26,697 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 4319 transitions. [2023-08-27 08:24:26,697 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 4319 transitions. [2023-08-27 08:24:26,698 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:24:26,698 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 4319 transitions. [2023-08-27 08:24:26,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 116.72972972972973) internal successors, (4319), 37 states have internal predecessors, (4319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:24:26,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 315.0) internal successors, (11970), 38 states have internal predecessors, (11970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:24:26,712 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 315.0) internal successors, (11970), 38 states have internal predecessors, (11970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:24:26,712 INFO L175 Difference]: Start difference. First operand has 409 places, 1033 transitions, 20490 flow. Second operand 37 states and 4319 transitions. [2023-08-27 08:24:26,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 1622 transitions, 31365 flow [2023-08-27 08:24:46,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 1622 transitions, 30303 flow, removed 498 selfloop flow, removed 8 redundant places. [2023-08-27 08:24:46,549 INFO L231 Difference]: Finished difference. Result has 446 places, 1167 transitions, 23634 flow [2023-08-27 08:24:46,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=19388, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=23634, PETRI_PLACES=446, PETRI_TRANSITIONS=1167} [2023-08-27 08:24:46,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2023-08-27 08:24:46,550 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 1167 transitions, 23634 flow [2023-08-27 08:24:46,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 105.75862068965517) internal successors, (3067), 29 states have internal predecessors, (3067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:24:46,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:24:46,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:24:46,558 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-27 08:24:46,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-08-27 08:24:46,756 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:24:46,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:24:46,757 INFO L85 PathProgramCache]: Analyzing trace with hash -152430742, now seen corresponding path program 1 times [2023-08-27 08:24:46,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:24:46,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114886221] [2023-08-27 08:24:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:24:46,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:24:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:24:47,722 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:24:47,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:24:47,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114886221] [2023-08-27 08:24:47,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114886221] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:24:47,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093176571] [2023-08-27 08:24:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:24:47,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:24:47,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:24:47,724 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:24:47,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-27 08:24:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:24:47,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 08:24:47,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:24:48,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:24:48,013 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:24:48,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:24:48,209 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-27 08:24:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:24:48,242 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:24:48,274 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1316 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1316) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)) is different from false [2023-08-27 08:24:48,534 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:24:48,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 280 treesize of output 249 [2023-08-27 08:24:48,546 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 87 treesize of output 73 [2023-08-27 08:24:48,566 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:24:48,567 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 63 [2023-08-27 08:24:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2023-08-27 08:24:48,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093176571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:24:48,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:24:48,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 27 [2023-08-27 08:24:48,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815548750] [2023-08-27 08:24:48,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:24:48,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 08:24:48,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:24:48,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 08:24:48,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=669, Unknown=5, NotChecked=52, Total=812 [2023-08-27 08:24:48,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 315 [2023-08-27 08:24:48,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 1167 transitions, 23634 flow. Second operand has 29 states, 29 states have (on average 99.72413793103448) internal successors, (2892), 29 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:24:48,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:24:48,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 315 [2023-08-27 08:24:48,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:24:58,030 WARN L234 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 92 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:25:00,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:25:06,109 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 08:25:06,514 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse5 (* c_~front~0 4))) (let ((.cse0 (+ c_~queue~0.offset .cse5)) (.cse4 (select |c_#memory_int| c_~queue~0.base)) (.cse7 (+ c_~queue~0.offset (* c_~back~0 4)))) (let ((.cse1 (not (= (select .cse4 .cse7) 1))) (.cse3 (select .cse4 .cse0)) (.cse2 (+ c_~queue~0.offset .cse5 4))) (and (or (forall ((v_ArrVal_1316 (Array Int Int))) (< (+ |c_thread2Thread1of1ForFork1_~temp~0#1| c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1316) c_~queue~0.base) .cse0)) 2147483648)) .cse1) (or (forall ((v_ArrVal_1316 (Array Int Int))) (< (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1316) c_~queue~0.base) .cse2) c_~d~0 .cse3) 2147483648)) .cse1) (= (select .cse4 .cse5) 1) (<= (+ c_~queue~0.base 2) |c_ULTIMATE.start_main_~#t3~0#1.base|) (forall ((v_ArrVal_1316 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1316) c_~queue~0.base) .cse0)) 2147483648)) (<= c_~d~0 1) (= c_~queue~0.offset 0) (= (select .cse4 (+ c_~queue~0.offset .cse5 (- 4))) 1) (= .cse3 1) (forall ((v_ArrVal_1316 (Array Int Int)) (v_ArrVal_1315 (Array Int Int))) (let ((.cse8 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1315))) (let ((.cse6 (select .cse8 c_~queue~0.base))) (or (not (= (select .cse6 .cse7) 1)) (< (+ (select (select (store .cse8 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1316) c_~queue~0.base) .cse2) c_~d~0 (select .cse6 .cse0)) 2147483648))))) (not (= c_~queue~0.base |c_ULTIMATE.start_main_~#t3~0#1.base|)))))) is different from false [2023-08-27 08:25:09,734 WARN L539 Checker$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 08:25:13,258 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 08:25:13,943 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_1316 (Array Int Int))) (< (+ c_~d~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1316) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4)))) 2147483648)))) (and .cse0 (or .cse0 (not (= (select (select |c_#memory_int| c_~queue~0.base) (+ c_~queue~0.offset (* c_~back~0 4))) 1))))) is different from false [2023-08-27 08:25:15,997 WARN L539 Checker$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 08:25:22,536 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 08:25:36,393 INFO L124 PetriNetUnfolderBase]: 38092/63482 cut-off events. [2023-08-27 08:25:36,393 INFO L125 PetriNetUnfolderBase]: For 1716948/1716948 co-relation queries the response was YES. [2023-08-27 08:25:37,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589815 conditions, 63482 events. 38092/63482 cut-off events. For 1716948/1716948 co-relation queries the response was YES. Maximal size of possible extension queue 2861. Compared 562090 event pairs, 7850 based on Foata normal form. 264/62915 useless extension candidates. Maximal degree in co-relation 589679. Up to 37226 conditions per place. [2023-08-27 08:25:38,098 INFO L140 encePairwiseOnDemand]: 296/315 looper letters, 805 selfloop transitions, 1006 changer transitions 32/1845 dead transitions. [2023-08-27 08:25:38,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 1845 transitions, 37630 flow [2023-08-27 08:25:38,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-27 08:25:38,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-27 08:25:38,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4828 transitions. [2023-08-27 08:25:38,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34834054834054834 [2023-08-27 08:25:38,104 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4828 transitions. [2023-08-27 08:25:38,104 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4828 transitions. [2023-08-27 08:25:38,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:25:38,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4828 transitions. [2023-08-27 08:25:38,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 109.72727272727273) internal successors, (4828), 44 states have internal predecessors, (4828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:25:38,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 315.0) internal successors, (14175), 45 states have internal predecessors, (14175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:25:38,118 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 315.0) internal successors, (14175), 45 states have internal predecessors, (14175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:25:38,118 INFO L175 Difference]: Start difference. First operand has 446 places, 1167 transitions, 23634 flow. Second operand 44 states and 4828 transitions. [2023-08-27 08:25:38,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 1845 transitions, 37630 flow [2023-08-27 08:25:54,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 1845 transitions, 37204 flow, removed 142 selfloop flow, removed 14 redundant places. [2023-08-27 08:25:54,670 INFO L231 Difference]: Finished difference. Result has 492 places, 1453 transitions, 32118 flow [2023-08-27 08:25:54,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=23069, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=747, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=32118, PETRI_PLACES=492, PETRI_TRANSITIONS=1453} [2023-08-27 08:25:54,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2023-08-27 08:25:54,671 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 1453 transitions, 32118 flow [2023-08-27 08:25:54,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 99.72413793103448) internal successors, (2892), 29 states have internal predecessors, (2892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:25:54,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:25:54,671 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:25:54,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-27 08:25:54,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-08-27 08:25:54,872 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:25:54,872 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:25:54,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1451011060, now seen corresponding path program 5 times [2023-08-27 08:25:54,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:25:54,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052136693] [2023-08-27 08:25:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:25:54,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:25:54,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:25:55,596 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:25:55,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:25:55,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052136693] [2023-08-27 08:25:55,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052136693] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:25:55,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26157352] [2023-08-27 08:25:55,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:25:55,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:25:55,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:25:55,605 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:25:55,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-27 08:25:55,764 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:25:55,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:25:55,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 08:25:55,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:25:55,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:25:55,954 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:25:56,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:25:56,121 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:25:56,326 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:25:56,327 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 100 [2023-08-27 08:25:56,342 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:25:56,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 47 [2023-08-27 08:25:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:25:56,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26157352] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:25:56,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:25:56,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 24 [2023-08-27 08:25:56,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547275328] [2023-08-27 08:25:56,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:25:56,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 08:25:56,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:25:56,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 08:25:56,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=568, Unknown=2, NotChecked=0, Total=650 [2023-08-27 08:25:56,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 315 [2023-08-27 08:25:56,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 1453 transitions, 32118 flow. Second operand has 26 states, 26 states have (on average 105.8076923076923) internal successors, (2751), 26 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:25:56,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:25:56,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 315 [2023-08-27 08:25:56,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:26:15,300 WARN L234 SmtUtils]: Spent 18.21s on a formula simplification. DAG size of input: 52 DAG size of output: 50 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:26:17,777 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 08:26:19,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:26:22,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:26:48,335 INFO L124 PetriNetUnfolderBase]: 39241/65210 cut-off events. [2023-08-27 08:26:48,335 INFO L125 PetriNetUnfolderBase]: For 2651649/2655403 co-relation queries the response was YES. [2023-08-27 08:26:49,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786292 conditions, 65210 events. 39241/65210 cut-off events. For 2651649/2655403 co-relation queries the response was YES. Maximal size of possible extension queue 2960. Compared 583398 event pairs, 17170 based on Foata normal form. 76/64287 useless extension candidates. Maximal degree in co-relation 786138. Up to 50675 conditions per place. [2023-08-27 08:26:50,235 INFO L140 encePairwiseOnDemand]: 305/315 looper letters, 1466 selfloop transitions, 308 changer transitions 1/1777 dead transitions. [2023-08-27 08:26:50,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 1777 transitions, 40830 flow [2023-08-27 08:26:50,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 08:26:50,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 08:26:50,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2576 transitions. [2023-08-27 08:26:50,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3717171717171717 [2023-08-27 08:26:50,238 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2576 transitions. [2023-08-27 08:26:50,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2576 transitions. [2023-08-27 08:26:50,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:26:50,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2576 transitions. [2023-08-27 08:26:50,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 117.0909090909091) internal successors, (2576), 22 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:26:50,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 315.0) internal successors, (7245), 23 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:26:50,246 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 315.0) internal successors, (7245), 23 states have internal predecessors, (7245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:26:50,246 INFO L175 Difference]: Start difference. First operand has 492 places, 1453 transitions, 32118 flow. Second operand 22 states and 2576 transitions. [2023-08-27 08:26:50,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 1777 transitions, 40830 flow [2023-08-27 08:27:23,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 1777 transitions, 38358 flow, removed 987 selfloop flow, removed 21 redundant places. [2023-08-27 08:27:23,431 INFO L231 Difference]: Finished difference. Result has 497 places, 1484 transitions, 31242 flow [2023-08-27 08:27:23,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=29773, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=31242, PETRI_PLACES=497, PETRI_TRANSITIONS=1484} [2023-08-27 08:27:23,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2023-08-27 08:27:23,432 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 1484 transitions, 31242 flow [2023-08-27 08:27:23,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 105.8076923076923) internal successors, (2751), 26 states have internal predecessors, (2751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:27:23,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:27:23,433 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:27:23,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-27 08:27:23,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:27:23,633 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:27:23,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:27:23,634 INFO L85 PathProgramCache]: Analyzing trace with hash -414009830, now seen corresponding path program 6 times [2023-08-27 08:27:23,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:27:23,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164859218] [2023-08-27 08:27:23,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:27:23,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:27:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:27:24,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:27:24,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:27:24,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164859218] [2023-08-27 08:27:24,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164859218] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:27:24,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918192210] [2023-08-27 08:27:24,630 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:27:24,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:27:24,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:27:24,631 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:27:24,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-27 08:27:24,764 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 08:27:24,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:27:24,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 08:27:24,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:27:25,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:27:25,100 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2023-08-27 08:27:25,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:27:25,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:27:25,816 INFO L322 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2023-08-27 08:27:25,817 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 74 [2023-08-27 08:27:25,834 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 08:27:25,834 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2023-08-27 08:27:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:27:26,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918192210] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:27:26,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:27:26,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 29 [2023-08-27 08:27:26,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865347012] [2023-08-27 08:27:26,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:27:26,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 08:27:26,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:27:26,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 08:27:26,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=804, Unknown=1, NotChecked=0, Total=930 [2023-08-27 08:27:26,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 315 [2023-08-27 08:27:26,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 1484 transitions, 31242 flow. Second operand has 31 states, 31 states have (on average 97.64516129032258) internal successors, (3027), 31 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:27:26,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:27:26,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 315 [2023-08-27 08:27:26,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:27:46,950 WARN L234 SmtUtils]: Spent 16.40s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:28:18,320 WARN L234 SmtUtils]: Spent 20.37s on a formula simplification. DAG size of input: 72 DAG size of output: 71 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:28:48,715 WARN L234 SmtUtils]: Spent 18.26s on a formula simplification. DAG size of input: 73 DAG size of output: 72 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:29:03,088 INFO L124 PetriNetUnfolderBase]: 50738/82618 cut-off events. [2023-08-27 08:29:03,088 INFO L125 PetriNetUnfolderBase]: For 3135746/3135746 co-relation queries the response was YES. [2023-08-27 08:29:05,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 943449 conditions, 82618 events. 50738/82618 cut-off events. For 3135746/3135746 co-relation queries the response was YES. Maximal size of possible extension queue 3086. Compared 720697 event pairs, 26307 based on Foata normal form. 44/81895 useless extension candidates. Maximal degree in co-relation 943295. Up to 68292 conditions per place. [2023-08-27 08:29:05,580 INFO L140 encePairwiseOnDemand]: 304/315 looper letters, 1756 selfloop transitions, 484 changer transitions 19/2260 dead transitions. [2023-08-27 08:29:05,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 2260 transitions, 49405 flow [2023-08-27 08:29:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-27 08:29:05,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-27 08:29:05,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 5894 transitions. [2023-08-27 08:29:05,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3341269841269841 [2023-08-27 08:29:05,585 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 5894 transitions. [2023-08-27 08:29:05,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 5894 transitions. [2023-08-27 08:29:05,586 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:05,586 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 5894 transitions. [2023-08-27 08:29:05,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 105.25) internal successors, (5894), 56 states have internal predecessors, (5894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:05,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 315.0) internal successors, (17955), 57 states have internal predecessors, (17955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:05,600 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 315.0) internal successors, (17955), 57 states have internal predecessors, (17955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:05,600 INFO L175 Difference]: Start difference. First operand has 497 places, 1484 transitions, 31242 flow. Second operand 56 states and 5894 transitions. [2023-08-27 08:29:05,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 2260 transitions, 49405 flow [2023-08-27 08:29:31,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 2260 transitions, 48669 flow, removed 150 selfloop flow, removed 10 redundant places. [2023-08-27 08:29:31,295 INFO L231 Difference]: Finished difference. Result has 561 places, 1809 transitions, 39979 flow [2023-08-27 08:29:31,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=30609, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=39979, PETRI_PLACES=561, PETRI_TRANSITIONS=1809} [2023-08-27 08:29:31,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 519 predicate places. [2023-08-27 08:29:31,297 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 1809 transitions, 39979 flow [2023-08-27 08:29:31,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 97.64516129032258) internal successors, (3027), 31 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:31,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:31,297 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:29:31,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-27 08:29:31,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:31,498 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:29:31,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:31,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1359514874, now seen corresponding path program 7 times [2023-08-27 08:29:31,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:31,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361566161] [2023-08-27 08:29:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:31,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:31,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:29:32,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:32,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361566161] [2023-08-27 08:29:32,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361566161] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:32,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129313340] [2023-08-27 08:29:32,340 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:29:32,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:32,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:32,345 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:29:32,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-27 08:29:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:32,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-27 08:29:32,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:29:32,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:29:32,760 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 08:29:32,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:29:32,982 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2023-08-27 08:29:33,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:29:33,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:29:35,590 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 08:29:35,590 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 154 treesize of output 157 [2023-08-27 08:29:35,601 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 67 [2023-08-27 08:29:35,621 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:29:35,621 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 63 [2023-08-27 08:29:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:29:36,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129313340] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:29:36,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:29:36,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 08:29:36,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301513540] [2023-08-27 08:29:36,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:29:36,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 08:29:36,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:36,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 08:29:36,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=852, Unknown=6, NotChecked=0, Total=992 [2023-08-27 08:29:36,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 315 [2023-08-27 08:29:36,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 1809 transitions, 39979 flow. Second operand has 32 states, 32 states have (on average 102.5) internal successors, (3280), 32 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:36,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:36,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 315 [2023-08-27 08:29:36,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:11,811 INFO L124 PetriNetUnfolderBase]: 40848/69012 cut-off events. [2023-08-27 08:30:11,812 INFO L125 PetriNetUnfolderBase]: For 4468564/4471836 co-relation queries the response was YES. [2023-08-27 08:30:13,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 947975 conditions, 69012 events. 40848/69012 cut-off events. For 4468564/4471836 co-relation queries the response was YES. Maximal size of possible extension queue 3181. Compared 636954 event pairs, 19966 based on Foata normal form. 76/68283 useless extension candidates. Maximal degree in co-relation 947802. Up to 54394 conditions per place. [2023-08-27 08:30:13,970 INFO L140 encePairwiseOnDemand]: 307/315 looper letters, 1493 selfloop transitions, 418 changer transitions 7/1920 dead transitions. [2023-08-27 08:30:13,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 1920 transitions, 46062 flow [2023-08-27 08:30:13,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 08:30:13,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 08:30:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1574 transitions. [2023-08-27 08:30:13,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3569160997732426 [2023-08-27 08:30:13,972 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1574 transitions. [2023-08-27 08:30:13,972 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1574 transitions. [2023-08-27 08:30:13,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:13,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1574 transitions. [2023-08-27 08:30:13,973 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 112.42857142857143) internal successors, (1574), 14 states have internal predecessors, (1574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:13,975 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 315.0) internal successors, (4725), 15 states have internal predecessors, (4725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:13,975 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 315.0) internal successors, (4725), 15 states have internal predecessors, (4725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:13,975 INFO L175 Difference]: Start difference. First operand has 561 places, 1809 transitions, 39979 flow. Second operand 14 states and 1574 transitions. [2023-08-27 08:30:13,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 1920 transitions, 46062 flow [2023-08-27 08:30:40,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 566 places, 1920 transitions, 45561 flow, removed 154 selfloop flow, removed 7 redundant places. [2023-08-27 08:30:41,015 INFO L231 Difference]: Finished difference. Result has 566 places, 1802 transitions, 40233 flow [2023-08-27 08:30:41,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=39405, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1803, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=40233, PETRI_PLACES=566, PETRI_TRANSITIONS=1802} [2023-08-27 08:30:41,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 524 predicate places. [2023-08-27 08:30:41,017 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 1802 transitions, 40233 flow [2023-08-27 08:30:41,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 102.5) internal successors, (3280), 32 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:41,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:41,018 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:41,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-27 08:30:41,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:41,218 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:30:41,218 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:41,219 INFO L85 PathProgramCache]: Analyzing trace with hash 808715383, now seen corresponding path program 4 times [2023-08-27 08:30:41,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:41,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066524363] [2023-08-27 08:30:41,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:41,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:41,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:42,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:42,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:42,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066524363] [2023-08-27 08:30:42,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066524363] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:42,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83191795] [2023-08-27 08:30:42,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:30:42,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:42,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:42,036 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:30:42,037 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-27 08:30:42,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:30:42,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:30:42,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-27 08:30:42,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:42,231 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-27 08:30:42,279 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2023-08-27 08:30:42,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:30:42,355 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2023-08-27 08:30:42,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:30:42,615 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 33 treesize of output 33 [2023-08-27 08:30:42,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:30:42,721 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 33 treesize of output 33 [2023-08-27 08:30:42,944 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:42,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:30:45,732 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:30:45,733 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 119 treesize of output 84 [2023-08-27 08:30:45,764 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:30:45,765 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1989 treesize of output 1882 [2023-08-27 08:30:45,802 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:30:45,803 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 128 treesize of output 126 [2023-08-27 08:30:45,813 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 89 treesize of output 63 [2023-08-27 08:30:45,824 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:30:45,824 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 110 treesize of output 58 [2023-08-27 08:30:46,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:46,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83191795] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:30:46,575 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:30:46,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 08:30:46,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764266635] [2023-08-27 08:30:46,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:30:46,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 08:30:46,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:46,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 08:30:46,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=863, Unknown=4, NotChecked=0, Total=992 [2023-08-27 08:30:46,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 315 [2023-08-27 08:30:46,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 1802 transitions, 40233 flow. Second operand has 32 states, 32 states have (on average 99.5) internal successors, (3184), 32 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:46,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:46,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 315 [2023-08-27 08:30:46,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:52,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:30:54,193 WARN L539 Checker$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 08:30:56,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:30:58,764 WARN L539 Checker$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 08:31:00,812 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:31:09,096 WARN L539 Checker$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 08:31:11,798 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:31:13,865 WARN L539 Checker$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 08:31:16,426 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 08:31:51,605 INFO L124 PetriNetUnfolderBase]: 41307/70103 cut-off events. [2023-08-27 08:31:51,605 INFO L125 PetriNetUnfolderBase]: For 4576198/4577648 co-relation queries the response was YES. [2023-08-27 08:31:53,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959610 conditions, 70103 events. 41307/70103 cut-off events. For 4576198/4577648 co-relation queries the response was YES. Maximal size of possible extension queue 3359. Compared 652746 event pairs, 19185 based on Foata normal form. 30/69475 useless extension candidates. Maximal degree in co-relation 959437. Up to 52784 conditions per place. [2023-08-27 08:31:53,976 INFO L140 encePairwiseOnDemand]: 304/315 looper letters, 1614 selfloop transitions, 466 changer transitions 14/2096 dead transitions. [2023-08-27 08:31:53,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 2096 transitions, 50637 flow [2023-08-27 08:31:53,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 08:31:53,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 08:31:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3155 transitions. [2023-08-27 08:31:53,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34537493158182814 [2023-08-27 08:31:53,979 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3155 transitions. [2023-08-27 08:31:53,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3155 transitions. [2023-08-27 08:31:53,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:31:53,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3155 transitions. [2023-08-27 08:31:53,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 108.79310344827586) internal successors, (3155), 29 states have internal predecessors, (3155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:31:53,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 315.0) internal successors, (9450), 30 states have internal predecessors, (9450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:31:53,987 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 315.0) internal successors, (9450), 30 states have internal predecessors, (9450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:31:53,987 INFO L175 Difference]: Start difference. First operand has 566 places, 1802 transitions, 40233 flow. Second operand 29 states and 3155 transitions. [2023-08-27 08:31:53,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 2096 transitions, 50637 flow [2023-08-27 08:32:20,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 584 places, 2096 transitions, 50014 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-27 08:32:20,194 INFO L231 Difference]: Finished difference. Result has 589 places, 1835 transitions, 41305 flow [2023-08-27 08:32:20,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=315, PETRI_DIFFERENCE_MINUEND_FLOW=39582, PETRI_DIFFERENCE_MINUEND_PLACES=556, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1800, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=432, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=41305, PETRI_PLACES=589, PETRI_TRANSITIONS=1835} [2023-08-27 08:32:20,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 547 predicate places. [2023-08-27 08:32:20,196 INFO L495 AbstractCegarLoop]: Abstraction has has 589 places, 1835 transitions, 41305 flow [2023-08-27 08:32:20,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 99.5) internal successors, (3184), 32 states have internal predecessors, (3184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:32:20,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:32:20,197 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:32:20,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-27 08:32:20,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-27 08:32:20,403 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 19 more)] === [2023-08-27 08:32:20,403 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:32:20,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1168376958, now seen corresponding path program 5 times [2023-08-27 08:32:20,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:32:20,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594633151] [2023-08-27 08:32:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:32:20,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:32:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:32:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:32:22,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:32:22,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594633151] [2023-08-27 08:32:22,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594633151] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:32:22,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212574078] [2023-08-27 08:32:22,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:32:22,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:32:22,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:32:22,229 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:32:22,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-27 08:32:22,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:32:22,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:32:22,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 08:32:22,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:32:22,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:32:22,747 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-27 08:32:22,933 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:32:22,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:32:23,279 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:32:23,279 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 79 [2023-08-27 08:32:23,324 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:32:23,324 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 6 [2023-08-27 08:32:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:32:23,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212574078] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:32:23,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:32:23,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 28 [2023-08-27 08:32:23,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835712928] [2023-08-27 08:32:23,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:32:23,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 08:32:23,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:32:23,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 08:32:23,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=771, Unknown=5, NotChecked=0, Total=870 [2023-08-27 08:32:23,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 315 [2023-08-27 08:32:23,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 589 places, 1835 transitions, 41305 flow. Second operand has 30 states, 30 states have (on average 105.6) internal successors, (3168), 30 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:32:23,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:32:23,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 315 [2023-08-27 08:32:23,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-27 08:32:32,822 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 08:32:32,823 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Timeout while monitored process is still running, waiting 1000 ms for graceful end