/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-send-receive-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 08:29:36,729 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 08:29:36,804 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 08:29:36,809 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 08:29:36,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 08:29:36,843 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 08:29:36,844 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 08:29:36,849 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 08:29:36,850 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 08:29:36,850 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 08:29:36,850 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 08:29:36,851 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 08:29:36,851 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 08:29:36,851 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 08:29:36,852 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 08:29:36,852 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 08:29:36,852 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 08:29:36,852 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 08:29:36,853 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 08:29:36,853 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 08:29:36,853 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 08:29:36,854 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 08:29:36,854 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 08:29:36,854 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 08:29:36,854 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 08:29:36,855 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 08:29:36,855 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 08:29:36,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:29:36,856 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 08:29:36,856 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 08:29:36,856 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 08:29:36,856 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 08:29:36,857 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 08:29:36,857 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 08:29:36,857 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 08:29:36,857 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 08:29:37,161 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 08:29:37,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 08:29:37,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 08:29:37,183 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 08:29:37,183 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 08:29:37,185 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-27 08:29:38,405 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 08:29:38,632 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 08:29:38,632 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-send-receive-alt.wvr.c [2023-08-27 08:29:38,639 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1307d29c/8f688c20c0da428585c66ccfaf0c8eac/FLAG4571063b1 [2023-08-27 08:29:38,650 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1307d29c/8f688c20c0da428585c66ccfaf0c8eac [2023-08-27 08:29:38,652 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 08:29:38,653 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 08:29:38,654 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 08:29:38,654 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 08:29:38,657 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 08:29:38,657 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:29:38" (1/1) ... [2023-08-27 08:29:38,658 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67da2d7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:29:38, skipping insertion in model container [2023-08-27 08:29:38,658 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:29:38" (1/1) ... [2023-08-27 08:29:38,678 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 08:29:38,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:29:38,829 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 08:29:38,848 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:29:38,855 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 08:29:38,855 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 08:29:38,861 INFO L206 MainTranslator]: Completed translation [2023-08-27 08:29:38,862 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:29:38 WrapperNode [2023-08-27 08:29:38,862 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 08:29:38,863 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 08:29:38,863 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 08:29:38,863 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 08:29:38,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:29:38" (1/1) ... [2023-08-27 08:29:38,875 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:29:38" (1/1) ... [2023-08-27 08:29:38,895 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 160 [2023-08-27 08:29:38,896 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 08:29:38,896 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 08:29:38,897 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 08:29:38,897 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 08:29:38,904 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:29:38" (1/1) ... [2023-08-27 08:29:38,904 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:29:38" (1/1) ... [2023-08-27 08:29:38,906 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:29:38" (1/1) ... [2023-08-27 08:29:38,907 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:29:38" (1/1) ... [2023-08-27 08:29:38,913 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:29:38" (1/1) ... [2023-08-27 08:29:38,916 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:29:38" (1/1) ... [2023-08-27 08:29:38,917 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:29:38" (1/1) ... [2023-08-27 08:29:38,918 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:29:38" (1/1) ... [2023-08-27 08:29:38,920 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 08:29:38,921 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 08:29:38,921 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 08:29:38,921 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 08:29:38,922 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:29:38" (1/1) ... [2023-08-27 08:29:38,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:29:38,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:38,950 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 08:29:38,968 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 08:29:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 08:29:38,995 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 08:29:38,995 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 08:29:38,996 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 08:29:38,996 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 08:29:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 08:29:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 08:29:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 08:29:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 08:29:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 08:29:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 08:29:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 08:29:38,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 08:29:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 08:29:38,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 08:29:39,000 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 08:29:39,108 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 08:29:39,112 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 08:29:39,401 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 08:29:39,529 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 08:29:39,529 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 08:29:39,531 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:29:39 BoogieIcfgContainer [2023-08-27 08:29:39,531 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 08:29:39,533 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 08:29:39,533 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 08:29:39,536 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 08:29:39,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 08:29:38" (1/3) ... [2023-08-27 08:29:39,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@381afb21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:29:39, skipping insertion in model container [2023-08-27 08:29:39,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:29:38" (2/3) ... [2023-08-27 08:29:39,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@381afb21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:29:39, skipping insertion in model container [2023-08-27 08:29:39,538 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:29:39" (3/3) ... [2023-08-27 08:29:39,539 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-send-receive-alt.wvr.c [2023-08-27 08:29:39,554 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 08:29:39,555 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-08-27 08:29:39,555 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 08:29:39,617 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 08:29:39,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 137 places, 141 transitions, 298 flow [2023-08-27 08:29:39,732 INFO L124 PetriNetUnfolderBase]: 11/139 cut-off events. [2023-08-27 08:29:39,732 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:29:39,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 139 events. 11/139 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 131 event pairs, 0 based on Foata normal form. 0/117 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-08-27 08:29:39,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 137 places, 141 transitions, 298 flow [2023-08-27 08:29:39,749 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 130 transitions, 272 flow [2023-08-27 08:29:39,753 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 08:29:39,765 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 126 places, 130 transitions, 272 flow [2023-08-27 08:29:39,771 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 126 places, 130 transitions, 272 flow [2023-08-27 08:29:39,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 130 transitions, 272 flow [2023-08-27 08:29:39,807 INFO L124 PetriNetUnfolderBase]: 11/130 cut-off events. [2023-08-27 08:29:39,808 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:29:39,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139 conditions, 130 events. 11/130 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 127 event pairs, 0 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 90. Up to 2 conditions per place. [2023-08-27 08:29:39,810 INFO L119 LiptonReduction]: Number of co-enabled transitions 1184 [2023-08-27 08:29:44,641 INFO L134 LiptonReduction]: Checked pairs total: 1476 [2023-08-27 08:29:44,641 INFO L136 LiptonReduction]: Total number of compositions: 146 [2023-08-27 08:29:44,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 08:29:44,671 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;@51b2e1bc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 08:29:44,672 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-08-27 08:29:44,675 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 08:29:44,675 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 08:29:44,675 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 08:29:44,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:44,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 08:29:44,676 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:29:44,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:44,681 INFO L85 PathProgramCache]: Analyzing trace with hash 20739, now seen corresponding path program 1 times [2023-08-27 08:29:44,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:44,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806109352] [2023-08-27 08:29:44,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:44,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:44,987 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 08:29:44,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:44,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806109352] [2023-08-27 08:29:44,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806109352] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:29:44,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:29:44,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:29:44,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417977957] [2023-08-27 08:29:44,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:29:44,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:29:45,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:45,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:29:45,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:29:45,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 287 [2023-08-27 08:29:45,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 64 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:45,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 287 [2023-08-27 08:29:45,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:45,096 INFO L124 PetriNetUnfolderBase]: 109/186 cut-off events. [2023-08-27 08:29:45,096 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-27 08:29:45,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 389 conditions, 186 events. 109/186 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 615 event pairs, 63 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 305. Up to 181 conditions per place. [2023-08-27 08:29:45,099 INFO L140 encePairwiseOnDemand]: 279/287 looper letters, 21 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2023-08-27 08:29:45,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 110 flow [2023-08-27 08:29:45,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:29:45,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:29:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 359 transitions. [2023-08-27 08:29:45,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169570267131243 [2023-08-27 08:29:45,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 359 transitions. [2023-08-27 08:29:45,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 359 transitions. [2023-08-27 08:29:45,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:45,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 359 transitions. [2023-08-27 08:29:45,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.66666666666667) internal successors, (359), 3 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,125 INFO L175 Difference]: Start difference. First operand has 30 places, 26 transitions, 64 flow. Second operand 3 states and 359 transitions. [2023-08-27 08:29:45,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 110 flow [2023-08-27 08:29:45,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 25 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 08:29:45,128 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 71 flow [2023-08-27 08:29:45,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-08-27 08:29:45,134 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -4 predicate places. [2023-08-27 08:29:45,134 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 71 flow [2023-08-27 08:29:45,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:45,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 08:29:45,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 08:29:45,136 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:29:45,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:45,144 INFO L85 PathProgramCache]: Analyzing trace with hash 644222, now seen corresponding path program 1 times [2023-08-27 08:29:45,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:45,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778054536] [2023-08-27 08:29:45,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:45,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:45,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:45,216 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 08:29:45,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:45,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778054536] [2023-08-27 08:29:45,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778054536] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:45,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542878773] [2023-08-27 08:29:45,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:45,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:45,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:45,221 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 08:29:45,243 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 08:29:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:45,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:29:45,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:29:45,331 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 08:29:45,331 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:29:45,346 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 08:29:45,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542878773] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:29:45,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:29:45,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 08:29:45,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341941625] [2023-08-27 08:29:45,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:29:45,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 08:29:45,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:45,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 08:29:45,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 08:29:45,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 287 [2023-08-27 08:29:45,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 71 flow. Second operand has 7 states, 7 states have (on average 111.14285714285714) internal successors, (778), 7 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:45,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 287 [2023-08-27 08:29:45,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:45,477 INFO L124 PetriNetUnfolderBase]: 115/195 cut-off events. [2023-08-27 08:29:45,477 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 08:29:45,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 413 conditions, 195 events. 115/195 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 636 event pairs, 63 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 359. Up to 183 conditions per place. [2023-08-27 08:29:45,480 INFO L140 encePairwiseOnDemand]: 282/287 looper letters, 20 selfloop transitions, 13 changer transitions 0/34 dead transitions. [2023-08-27 08:29:45,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 173 flow [2023-08-27 08:29:45,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 08:29:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 08:29:45,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 806 transitions. [2023-08-27 08:29:45,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011946241911399 [2023-08-27 08:29:45,486 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 806 transitions. [2023-08-27 08:29:45,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 806 transitions. [2023-08-27 08:29:45,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:45,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 806 transitions. [2023-08-27 08:29:45,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.14285714285714) internal successors, (806), 7 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 287.0) internal successors, (2296), 8 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,499 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 287.0) internal successors, (2296), 8 states have internal predecessors, (2296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,503 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 71 flow. Second operand 7 states and 806 transitions. [2023-08-27 08:29:45,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 173 flow [2023-08-27 08:29:45,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 168 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 08:29:45,505 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 150 flow [2023-08-27 08:29:45,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-08-27 08:29:45,506 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-08-27 08:29:45,506 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 150 flow [2023-08-27 08:29:45,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.14285714285714) internal successors, (778), 7 states have internal predecessors, (778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:45,507 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-27 08:29:45,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 08:29:45,713 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 08:29:45,714 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:29:45,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:45,714 INFO L85 PathProgramCache]: Analyzing trace with hash 19971843, now seen corresponding path program 1 times [2023-08-27 08:29:45,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:45,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380921202] [2023-08-27 08:29:45,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:45,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:45,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:29:45,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:45,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380921202] [2023-08-27 08:29:45,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380921202] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:29:45,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:29:45,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:29:45,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94317312] [2023-08-27 08:29:45,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:29:45,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:29:45,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:45,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:29:45,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:29:45,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 287 [2023-08-27 08:29:45,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 150 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:45,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 287 [2023-08-27 08:29:45,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:45,816 INFO L124 PetriNetUnfolderBase]: 112/191 cut-off events. [2023-08-27 08:29:45,817 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 08:29:45,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 421 conditions, 191 events. 112/191 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 624 event pairs, 63 based on Foata normal form. 0/88 useless extension candidates. Maximal degree in co-relation 385. Up to 180 conditions per place. [2023-08-27 08:29:45,818 INFO L140 encePairwiseOnDemand]: 284/287 looper letters, 23 selfloop transitions, 6 changer transitions 0/30 dead transitions. [2023-08-27 08:29:45,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 181 flow [2023-08-27 08:29:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:29:45,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:29:45,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 352 transitions. [2023-08-27 08:29:45,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4088269454123113 [2023-08-27 08:29:45,820 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 352 transitions. [2023-08-27 08:29:45,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 352 transitions. [2023-08-27 08:29:45,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:45,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 352 transitions. [2023-08-27 08:29:45,821 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,823 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,823 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,823 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 150 flow. Second operand 3 states and 352 transitions. [2023-08-27 08:29:45,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 181 flow [2023-08-27 08:29:45,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 160 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 08:29:45,826 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 114 flow [2023-08-27 08:29:45,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-27 08:29:45,827 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-27 08:29:45,828 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 114 flow [2023-08-27 08:29:45,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:45,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 08:29:45,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-27 08:29:45,830 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:29:45,830 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:45,830 INFO L85 PathProgramCache]: Analyzing trace with hash 19961701, now seen corresponding path program 1 times [2023-08-27 08:29:45,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:45,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181948630] [2023-08-27 08:29:45,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:45,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:45,921 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 08:29:45,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:45,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181948630] [2023-08-27 08:29:45,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181948630] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:29:45,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:29:45,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:29:45,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243347296] [2023-08-27 08:29:45,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:29:45,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:29:45,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:45,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:29:45,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:29:45,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 287 [2023-08-27 08:29:45,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:45,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:45,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 287 [2023-08-27 08:29:45,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:46,014 INFO L124 PetriNetUnfolderBase]: 100/189 cut-off events. [2023-08-27 08:29:46,014 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-08-27 08:29:46,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 189 events. 100/189 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 674 event pairs, 39 based on Foata normal form. 0/103 useless extension candidates. Maximal degree in co-relation 380. Up to 125 conditions per place. [2023-08-27 08:29:46,017 INFO L140 encePairwiseOnDemand]: 281/287 looper letters, 37 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-27 08:29:46,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 214 flow [2023-08-27 08:29:46,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:29:46,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:29:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 365 transitions. [2023-08-27 08:29:46,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42392566782810687 [2023-08-27 08:29:46,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 365 transitions. [2023-08-27 08:29:46,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 365 transitions. [2023-08-27 08:29:46,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:46,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 365 transitions. [2023-08-27 08:29:46,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,023 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 114 flow. Second operand 3 states and 365 transitions. [2023-08-27 08:29:46,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 214 flow [2023-08-27 08:29:46,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:29:46,025 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 120 flow [2023-08-27 08:29:46,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2023-08-27 08:29:46,027 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2023-08-27 08:29:46,027 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 120 flow [2023-08-27 08:29:46,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:46,028 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 08:29:46,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 08:29:46,028 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:29:46,029 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:46,029 INFO L85 PathProgramCache]: Analyzing trace with hash 2013113614, now seen corresponding path program 2 times [2023-08-27 08:29:46,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:46,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403434852] [2023-08-27 08:29:46,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:46,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:46,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:46,105 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 08:29:46,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:46,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403434852] [2023-08-27 08:29:46,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403434852] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:46,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212226339] [2023-08-27 08:29:46,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:29:46,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:46,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:46,107 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 08:29:46,154 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 08:29:46,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:29:46,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:29:46,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:29:46,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:29:46,215 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 08:29:46,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:29:46,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212226339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:29:46,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:29:46,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 08:29:46,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391605219] [2023-08-27 08:29:46,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:29:46,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:29:46,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:46,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:29:46,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:29:46,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 287 [2023-08-27 08:29:46,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:46,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 287 [2023-08-27 08:29:46,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:46,261 INFO L124 PetriNetUnfolderBase]: 100/188 cut-off events. [2023-08-27 08:29:46,262 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-27 08:29:46,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 188 events. 100/188 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 677 event pairs, 75 based on Foata normal form. 1/128 useless extension candidates. Maximal degree in co-relation 433. Up to 186 conditions per place. [2023-08-27 08:29:46,263 INFO L140 encePairwiseOnDemand]: 285/287 looper letters, 28 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-27 08:29:46,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 168 flow [2023-08-27 08:29:46,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:29:46,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:29:46,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 354 transitions. [2023-08-27 08:29:46,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2023-08-27 08:29:46,265 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 354 transitions. [2023-08-27 08:29:46,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 354 transitions. [2023-08-27 08:29:46,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:46,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 354 transitions. [2023-08-27 08:29:46,266 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,268 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,268 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 120 flow. Second operand 3 states and 354 transitions. [2023-08-27 08:29:46,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 168 flow [2023-08-27 08:29:46,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 150 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-27 08:29:46,270 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 94 flow [2023-08-27 08:29:46,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2023-08-27 08:29:46,271 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2023-08-27 08:29:46,271 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 94 flow [2023-08-27 08:29:46,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:46,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:29:46,280 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 08:29:46,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:46,478 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:29:46,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:46,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1974221235, now seen corresponding path program 1 times [2023-08-27 08:29:46,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:46,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384095456] [2023-08-27 08:29:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:46,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:46,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:46,565 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 08:29:46,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:46,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384095456] [2023-08-27 08:29:46,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384095456] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:29:46,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:29:46,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:29:46,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535839309] [2023-08-27 08:29:46,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:29:46,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:29:46,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:46,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:29:46,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 08:29:46,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 287 [2023-08-27 08:29:46,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 94 flow. Second operand has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:46,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 287 [2023-08-27 08:29:46,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:46,637 INFO L124 PetriNetUnfolderBase]: 108/217 cut-off events. [2023-08-27 08:29:46,637 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-27 08:29:46,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 500 conditions, 217 events. 108/217 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 834 event pairs, 84 based on Foata normal form. 6/162 useless extension candidates. Maximal degree in co-relation 490. Up to 185 conditions per place. [2023-08-27 08:29:46,639 INFO L140 encePairwiseOnDemand]: 281/287 looper letters, 36 selfloop transitions, 3 changer transitions 0/40 dead transitions. [2023-08-27 08:29:46,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 40 transitions, 196 flow [2023-08-27 08:29:46,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:29:46,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:29:46,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 443 transitions. [2023-08-27 08:29:46,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3858885017421603 [2023-08-27 08:29:46,641 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 443 transitions. [2023-08-27 08:29:46,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 443 transitions. [2023-08-27 08:29:46,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:46,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 443 transitions. [2023-08-27 08:29:46,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,645 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,645 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 94 flow. Second operand 4 states and 443 transitions. [2023-08-27 08:29:46,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 40 transitions, 196 flow [2023-08-27 08:29:46,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 40 transitions, 195 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:29:46,646 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 106 flow [2023-08-27 08:29:46,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-27 08:29:46,647 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-27 08:29:46,647 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 106 flow [2023-08-27 08:29:46,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.5) internal successors, (414), 4 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:46,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:29:46,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 08:29:46,648 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:29:46,648 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:46,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1564171331, now seen corresponding path program 1 times [2023-08-27 08:29:46,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:46,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130187473] [2023-08-27 08:29:46,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:46,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:46,719 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 08:29:46,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:46,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130187473] [2023-08-27 08:29:46,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130187473] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:46,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466379718] [2023-08-27 08:29:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:46,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:46,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:46,721 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 08:29:46,744 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 08:29:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:46,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:29:46,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:29:46,813 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 08:29:46,813 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:29:46,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466379718] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:29:46,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:29:46,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 08:29:46,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580960668] [2023-08-27 08:29:46,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:29:46,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:29:46,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:46,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:29:46,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:29:46,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 287 [2023-08-27 08:29:46,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:46,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 287 [2023-08-27 08:29:46,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:46,850 INFO L124 PetriNetUnfolderBase]: 56/125 cut-off events. [2023-08-27 08:29:46,850 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-27 08:29:46,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 304 conditions, 125 events. 56/125 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 388 event pairs, 38 based on Foata normal form. 16/132 useless extension candidates. Maximal degree in co-relation 292. Up to 121 conditions per place. [2023-08-27 08:29:46,851 INFO L140 encePairwiseOnDemand]: 283/287 looper letters, 25 selfloop transitions, 1 changer transitions 0/27 dead transitions. [2023-08-27 08:29:46,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 27 transitions, 146 flow [2023-08-27 08:29:46,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:29:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:29:46,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-08-27 08:29:46,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42044134727061555 [2023-08-27 08:29:46,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-08-27 08:29:46,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-08-27 08:29:46,853 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:46,853 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-08-27 08:29:46,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,855 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 287.0) internal successors, (1148), 4 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,855 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 106 flow. Second operand 3 states and 362 transitions. [2023-08-27 08:29:46,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 27 transitions, 146 flow [2023-08-27 08:29:46,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 27 transitions, 141 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:29:46,857 INFO L231 Difference]: Finished difference. Result has 30 places, 27 transitions, 91 flow [2023-08-27 08:29:46,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=30, PETRI_TRANSITIONS=27} [2023-08-27 08:29:46,857 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 0 predicate places. [2023-08-27 08:29:46,857 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 27 transitions, 91 flow [2023-08-27 08:29:46,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 116.33333333333333) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:46,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:46,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:29:46,867 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 08:29:47,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:47,064 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:29:47,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:47,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1244671710, now seen corresponding path program 1 times [2023-08-27 08:29:47,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:47,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738425974] [2023-08-27 08:29:47,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:47,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:47,562 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 08:29:47,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:47,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738425974] [2023-08-27 08:29:47,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738425974] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:47,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811237469] [2023-08-27 08:29:47,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:47,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:47,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:47,567 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 08:29:47,593 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 08:29:47,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:47,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 08:29:47,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:29:47,738 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 08:29:47,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:29:47,829 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 20 treesize of output 22 [2023-08-27 08:29:47,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:29:47,903 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 20 treesize of output 22 [2023-08-27 08:29:48,013 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 08:29:48,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:29:50,273 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:29:50,274 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 32 treesize of output 33 [2023-08-27 08:29:50,290 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:29:50,290 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 93 treesize of output 85 [2023-08-27 08:29:50,298 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2023-08-27 08:29:50,309 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 26 [2023-08-27 08:29:50,412 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 08:29:50,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811237469] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:29:50,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:29:50,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-27 08:29:50,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595145771] [2023-08-27 08:29:50,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:29:50,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:29:50,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:50,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:29:50,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=224, Unknown=1, NotChecked=0, Total=272 [2023-08-27 08:29:50,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 08:29:50,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 91 flow. Second operand has 17 states, 17 states have (on average 76.58823529411765) internal successors, (1302), 17 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:50,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:50,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 08:29:50,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:51,979 INFO L124 PetriNetUnfolderBase]: 222/435 cut-off events. [2023-08-27 08:29:51,980 INFO L125 PetriNetUnfolderBase]: For 64/64 co-relation queries the response was YES. [2023-08-27 08:29:51,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 435 events. 222/435 cut-off events. For 64/64 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 1851 event pairs, 30 based on Foata normal form. 4/406 useless extension candidates. Maximal degree in co-relation 1029. Up to 125 conditions per place. [2023-08-27 08:29:51,982 INFO L140 encePairwiseOnDemand]: 277/287 looper letters, 67 selfloop transitions, 20 changer transitions 32/119 dead transitions. [2023-08-27 08:29:51,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 119 transitions, 577 flow [2023-08-27 08:29:51,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 08:29:51,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 08:29:51,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1399 transitions. [2023-08-27 08:29:51,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28673908587825375 [2023-08-27 08:29:51,988 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1399 transitions. [2023-08-27 08:29:51,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1399 transitions. [2023-08-27 08:29:51,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:51,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1399 transitions. [2023-08-27 08:29:51,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 82.29411764705883) internal successors, (1399), 17 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:51,999 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 287.0) internal successors, (5166), 18 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:52,000 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 287.0) internal successors, (5166), 18 states have internal predecessors, (5166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:52,000 INFO L175 Difference]: Start difference. First operand has 30 places, 27 transitions, 91 flow. Second operand 17 states and 1399 transitions. [2023-08-27 08:29:52,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 119 transitions, 577 flow [2023-08-27 08:29:52,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 119 transitions, 576 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:29:52,005 INFO L231 Difference]: Finished difference. Result has 55 places, 40 transitions, 238 flow [2023-08-27 08:29:52,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=238, PETRI_PLACES=55, PETRI_TRANSITIONS=40} [2023-08-27 08:29:52,007 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2023-08-27 08:29:52,007 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 40 transitions, 238 flow [2023-08-27 08:29:52,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 76.58823529411765) internal successors, (1302), 17 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:52,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:52,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:29:52,015 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 08:29:52,215 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 08:29:52,215 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:29:52,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:52,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1244671711, now seen corresponding path program 1 times [2023-08-27 08:29:52,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:52,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227543518] [2023-08-27 08:29:52,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:52,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:52,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:52,639 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 08:29:52,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:52,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227543518] [2023-08-27 08:29:52,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227543518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:52,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437014399] [2023-08-27 08:29:52,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:52,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:52,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:52,641 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 08:29:52,665 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 08:29:52,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:52,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 08:29:52,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:29:52,793 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 08:29:52,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:29:52,845 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 08:29:52,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:29:52,896 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 08:29:52,959 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 08:29:52,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:29:55,155 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:29:55,155 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 31 treesize of output 32 [2023-08-27 08:29:55,173 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:29:55,174 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 173 treesize of output 157 [2023-08-27 08:29:55,181 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 31 treesize of output 25 [2023-08-27 08:29:55,217 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2023-08-27 08:29:55,248 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 08:29:55,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437014399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:29:55,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:29:55,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-27 08:29:55,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107542432] [2023-08-27 08:29:55,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:29:55,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:29:55,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:55,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:29:55,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:29:55,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 08:29:55,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 40 transitions, 238 flow. Second operand has 17 states, 17 states have (on average 76.58823529411765) internal successors, (1302), 17 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:55,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:55,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 08:29:55,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:56,302 INFO L124 PetriNetUnfolderBase]: 189/374 cut-off events. [2023-08-27 08:29:56,302 INFO L125 PetriNetUnfolderBase]: For 426/426 co-relation queries the response was YES. [2023-08-27 08:29:56,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1190 conditions, 374 events. 189/374 cut-off events. For 426/426 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1550 event pairs, 26 based on Foata normal form. 16/389 useless extension candidates. Maximal degree in co-relation 1167. Up to 107 conditions per place. [2023-08-27 08:29:56,305 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 68 selfloop transitions, 20 changer transitions 16/104 dead transitions. [2023-08-27 08:29:56,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 104 transitions, 669 flow [2023-08-27 08:29:56,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 08:29:56,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 08:29:56,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1228 transitions. [2023-08-27 08:29:56,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28524970963995355 [2023-08-27 08:29:56,309 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1228 transitions. [2023-08-27 08:29:56,309 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1228 transitions. [2023-08-27 08:29:56,310 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:56,310 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1228 transitions. [2023-08-27 08:29:56,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 81.86666666666666) internal successors, (1228), 15 states have internal predecessors, (1228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:56,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 287.0) internal successors, (4592), 16 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:56,319 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 287.0) internal successors, (4592), 16 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:56,319 INFO L175 Difference]: Start difference. First operand has 55 places, 40 transitions, 238 flow. Second operand 15 states and 1228 transitions. [2023-08-27 08:29:56,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 104 transitions, 669 flow [2023-08-27 08:29:56,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 104 transitions, 630 flow, removed 12 selfloop flow, removed 7 redundant places. [2023-08-27 08:29:56,324 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 278 flow [2023-08-27 08:29:56,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=278, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-08-27 08:29:56,325 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 30 predicate places. [2023-08-27 08:29:56,325 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 278 flow [2023-08-27 08:29:56,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 76.58823529411765) internal successors, (1302), 17 states have internal predecessors, (1302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:56,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:56,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:29:56,333 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 08:29:56,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:56,529 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:29:56,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:56,529 INFO L85 PathProgramCache]: Analyzing trace with hash -69881948, now seen corresponding path program 1 times [2023-08-27 08:29:56,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:56,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844551452] [2023-08-27 08:29:56,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:56,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:56,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:29:56,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:56,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844551452] [2023-08-27 08:29:56,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844551452] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:56,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491447351] [2023-08-27 08:29:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:56,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:56,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:56,661 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 08:29:56,683 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 08:29:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:56,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 08:29:56,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:29:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:29:56,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:29:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:29:56,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491447351] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:29:56,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:29:56,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-27 08:29:56,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780468452] [2023-08-27 08:29:56,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:29:56,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:29:56,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:56,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:29:56,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:29:56,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 287 [2023-08-27 08:29:56,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 278 flow. Second operand has 17 states, 17 states have (on average 99.58823529411765) internal successors, (1693), 17 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:56,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:56,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 287 [2023-08-27 08:29:56,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:57,131 INFO L124 PetriNetUnfolderBase]: 171/356 cut-off events. [2023-08-27 08:29:57,132 INFO L125 PetriNetUnfolderBase]: For 689/689 co-relation queries the response was YES. [2023-08-27 08:29:57,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 356 events. 171/356 cut-off events. For 689/689 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1576 event pairs, 59 based on Foata normal form. 40/383 useless extension candidates. Maximal degree in co-relation 1114. Up to 154 conditions per place. [2023-08-27 08:29:57,134 INFO L140 encePairwiseOnDemand]: 280/287 looper letters, 47 selfloop transitions, 9 changer transitions 9/67 dead transitions. [2023-08-27 08:29:57,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 453 flow [2023-08-27 08:29:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 08:29:57,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 08:29:57,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 844 transitions. [2023-08-27 08:29:57,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.367595818815331 [2023-08-27 08:29:57,137 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 844 transitions. [2023-08-27 08:29:57,137 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 844 transitions. [2023-08-27 08:29:57,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:57,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 844 transitions. [2023-08-27 08:29:57,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 105.5) internal successors, (844), 8 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:57,143 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:57,143 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 287.0) internal successors, (2583), 9 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:57,143 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 278 flow. Second operand 8 states and 844 transitions. [2023-08-27 08:29:57,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 453 flow [2023-08-27 08:29:57,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 67 transitions, 412 flow, removed 6 selfloop flow, removed 13 redundant places. [2023-08-27 08:29:57,148 INFO L231 Difference]: Finished difference. Result has 56 places, 37 transitions, 226 flow [2023-08-27 08:29:57,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=226, PETRI_PLACES=56, PETRI_TRANSITIONS=37} [2023-08-27 08:29:57,149 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2023-08-27 08:29:57,149 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 37 transitions, 226 flow [2023-08-27 08:29:57,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 99.58823529411765) internal successors, (1693), 17 states have internal predecessors, (1693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:57,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:57,150 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:29:57,157 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 08:29:57,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:57,356 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:29:57,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:57,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1414004958, now seen corresponding path program 2 times [2023-08-27 08:29:57,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:57,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807446235] [2023-08-27 08:29:57,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:57,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:29:58,443 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 08:29:58,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:29:58,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807446235] [2023-08-27 08:29:58,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807446235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:29:58,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004147410] [2023-08-27 08:29:58,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:29:58,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:58,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:29:58,445 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 08:29:58,465 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 08:29:58,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:29:58,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:29:58,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:29:58,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:29:58,632 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 08:29:58,633 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:29:58,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004147410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:29:58,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:29:58,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2023-08-27 08:29:58,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255363559] [2023-08-27 08:29:58,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:29:58,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:29:58,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:29:58,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:29:58,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:29:58,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 287 [2023-08-27 08:29:58,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 37 transitions, 226 flow. Second operand has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 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 08:29:58,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:29:58,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 287 [2023-08-27 08:29:58,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:29:58,730 INFO L124 PetriNetUnfolderBase]: 193/396 cut-off events. [2023-08-27 08:29:58,730 INFO L125 PetriNetUnfolderBase]: For 693/693 co-relation queries the response was YES. [2023-08-27 08:29:58,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1288 conditions, 396 events. 193/396 cut-off events. For 693/693 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1747 event pairs, 45 based on Foata normal form. 4/391 useless extension candidates. Maximal degree in co-relation 1266. Up to 171 conditions per place. [2023-08-27 08:29:58,732 INFO L140 encePairwiseOnDemand]: 283/287 looper letters, 44 selfloop transitions, 8 changer transitions 0/54 dead transitions. [2023-08-27 08:29:58,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 54 transitions, 404 flow [2023-08-27 08:29:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:29:58,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:29:58,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 444 transitions. [2023-08-27 08:29:58,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2023-08-27 08:29:58,735 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 444 transitions. [2023-08-27 08:29:58,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 444 transitions. [2023-08-27 08:29:58,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:29:58,735 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 444 transitions. [2023-08-27 08:29:58,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 111.0) internal successors, (444), 4 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:58,739 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:58,739 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:29:58,739 INFO L175 Difference]: Start difference. First operand has 56 places, 37 transitions, 226 flow. Second operand 4 states and 444 transitions. [2023-08-27 08:29:58,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 54 transitions, 404 flow [2023-08-27 08:29:58,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 54 transitions, 386 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-27 08:29:58,745 INFO L231 Difference]: Finished difference. Result has 55 places, 38 transitions, 247 flow [2023-08-27 08:29:58,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=55, PETRI_TRANSITIONS=38} [2023-08-27 08:29:58,745 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 25 predicate places. [2023-08-27 08:29:58,746 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 38 transitions, 247 flow [2023-08-27 08:29:58,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 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 08:29:58,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:29:58,746 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:29:58,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 08:29:58,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:29:58,952 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:29:58,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:29:58,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1414004959, now seen corresponding path program 2 times [2023-08-27 08:29:58,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:29:58,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368909927] [2023-08-27 08:29:58,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:29:58,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:29:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:00,439 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 08:30:00,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:00,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368909927] [2023-08-27 08:30:00,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368909927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:00,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657446090] [2023-08-27 08:30:00,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:30:00,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:00,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:00,445 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 08:30:00,469 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 08:30:00,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:30:00,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:30:00,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:30:00,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:00,654 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 08:30:00,654 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:30:00,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657446090] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:30:00,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:30:00,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 9 [2023-08-27 08:30:00,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859766923] [2023-08-27 08:30:00,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:30:00,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 08:30:00,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:00,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 08:30:00,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-08-27 08:30:00,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 287 [2023-08-27 08:30:00,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 38 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 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 08:30:00,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:00,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 287 [2023-08-27 08:30:00,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:00,752 INFO L124 PetriNetUnfolderBase]: 187/386 cut-off events. [2023-08-27 08:30:00,752 INFO L125 PetriNetUnfolderBase]: For 621/621 co-relation queries the response was YES. [2023-08-27 08:30:00,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 386 events. 187/386 cut-off events. For 621/621 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1697 event pairs, 43 based on Foata normal form. 4/381 useless extension candidates. Maximal degree in co-relation 1229. Up to 171 conditions per place. [2023-08-27 08:30:00,755 INFO L140 encePairwiseOnDemand]: 283/287 looper letters, 43 selfloop transitions, 8 changer transitions 0/53 dead transitions. [2023-08-27 08:30:00,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 401 flow [2023-08-27 08:30:00,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:30:00,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:30:00,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 443 transitions. [2023-08-27 08:30:00,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3858885017421603 [2023-08-27 08:30:00,757 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 443 transitions. [2023-08-27 08:30:00,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 443 transitions. [2023-08-27 08:30:00,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:00,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 443 transitions. [2023-08-27 08:30:00,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 110.75) internal successors, (443), 4 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:00,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:00,760 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:00,760 INFO L175 Difference]: Start difference. First operand has 55 places, 38 transitions, 247 flow. Second operand 4 states and 443 transitions. [2023-08-27 08:30:00,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 401 flow [2023-08-27 08:30:00,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 390 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 08:30:00,764 INFO L231 Difference]: Finished difference. Result has 57 places, 38 transitions, 261 flow [2023-08-27 08:30:00,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=261, PETRI_PLACES=57, PETRI_TRANSITIONS=38} [2023-08-27 08:30:00,765 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 27 predicate places. [2023-08-27 08:30:00,766 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 38 transitions, 261 flow [2023-08-27 08:30:00,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 104.0) internal successors, (416), 4 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 08:30:00,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:00,766 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:00,772 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 08:30:00,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-27 08:30:00,972 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:30:00,973 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:00,973 INFO L85 PathProgramCache]: Analyzing trace with hash -979582188, now seen corresponding path program 2 times [2023-08-27 08:30:00,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:00,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852035445] [2023-08-27 08:30:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:00,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:01,073 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:30:01,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:01,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852035445] [2023-08-27 08:30:01,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852035445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:01,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582710339] [2023-08-27 08:30:01,074 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:30:01,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:01,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:01,075 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 08:30:01,088 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 08:30:01,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:30:01,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:30:01,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 08:30:01,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:01,254 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 130 treesize of output 98 [2023-08-27 08:30:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:30:01,288 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:30:01,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582710339] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:30:01,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:30:01,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-27 08:30:01,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181941547] [2023-08-27 08:30:01,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:30:01,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:30:01,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:01,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:30:01,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-27 08:30:01,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 287 [2023-08-27 08:30:01,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 38 transitions, 261 flow. Second operand has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 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 08:30:01,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:01,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 287 [2023-08-27 08:30:01,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:01,403 INFO L124 PetriNetUnfolderBase]: 271/548 cut-off events. [2023-08-27 08:30:01,403 INFO L125 PetriNetUnfolderBase]: For 1262/1262 co-relation queries the response was YES. [2023-08-27 08:30:01,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1848 conditions, 548 events. 271/548 cut-off events. For 1262/1262 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2639 event pairs, 71 based on Foata normal form. 12/551 useless extension candidates. Maximal degree in co-relation 1824. Up to 252 conditions per place. [2023-08-27 08:30:01,407 INFO L140 encePairwiseOnDemand]: 282/287 looper letters, 45 selfloop transitions, 12 changer transitions 0/59 dead transitions. [2023-08-27 08:30:01,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 503 flow [2023-08-27 08:30:01,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 08:30:01,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 08:30:01,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2023-08-27 08:30:01,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42770034843205573 [2023-08-27 08:30:01,410 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2023-08-27 08:30:01,410 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2023-08-27 08:30:01,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:01,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2023-08-27 08:30:01,412 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:01,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:01,414 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 287.0) internal successors, (1435), 5 states have internal predecessors, (1435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:01,414 INFO L175 Difference]: Start difference. First operand has 57 places, 38 transitions, 261 flow. Second operand 4 states and 491 transitions. [2023-08-27 08:30:01,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 503 flow [2023-08-27 08:30:01,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 59 transitions, 483 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 08:30:01,419 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 354 flow [2023-08-27 08:30:01,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=245, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=354, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2023-08-27 08:30:01,420 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 29 predicate places. [2023-08-27 08:30:01,420 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 354 flow [2023-08-27 08:30:01,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 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 08:30:01,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:01,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:01,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 08:30:01,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-27 08:30:01,627 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:30:01,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:01,627 INFO L85 PathProgramCache]: Analyzing trace with hash -302275089, now seen corresponding path program 3 times [2023-08-27 08:30:01,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:01,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363916700] [2023-08-27 08:30:01,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:01,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:02,602 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:02,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:02,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363916700] [2023-08-27 08:30:02,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363916700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:02,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227218218] [2023-08-27 08:30:02,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:30:02,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:02,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:02,605 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 08:30:02,628 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 08:30:02,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:30:02,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:30:02,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-27 08:30:02,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:02,800 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 08:30:02,838 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 08:30:02,878 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 08:30:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:03,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:30:03,920 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:30:03,920 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 153 treesize of output 105 [2023-08-27 08:30:03,958 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-27 08:30:03,958 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 715 treesize of output 652 [2023-08-27 08:30:03,986 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:30:03,988 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:30:03,999 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:30:03,999 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 208 treesize of output 195 [2023-08-27 08:30:04,031 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-27 08:30:04,031 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 213 treesize of output 167 [2023-08-27 08:30:04,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:04,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227218218] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:30:04,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:30:04,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-27 08:30:04,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898360009] [2023-08-27 08:30:04,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:30:04,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 08:30:04,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:04,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 08:30:04,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=639, Unknown=2, NotChecked=0, Total=812 [2023-08-27 08:30:04,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 08:30:04,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 354 flow. Second operand has 29 states, 29 states have (on average 76.24137931034483) internal successors, (2211), 29 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:04,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:04,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 08:30:04,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:07,665 INFO L124 PetriNetUnfolderBase]: 609/1186 cut-off events. [2023-08-27 08:30:07,665 INFO L125 PetriNetUnfolderBase]: For 3364/3364 co-relation queries the response was YES. [2023-08-27 08:30:07,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4539 conditions, 1186 events. 609/1186 cut-off events. For 3364/3364 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6547 event pairs, 67 based on Foata normal form. 17/1200 useless extension candidates. Maximal degree in co-relation 4513. Up to 331 conditions per place. [2023-08-27 08:30:07,674 INFO L140 encePairwiseOnDemand]: 277/287 looper letters, 163 selfloop transitions, 61 changer transitions 2/226 dead transitions. [2023-08-27 08:30:07,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 226 transitions, 1793 flow [2023-08-27 08:30:07,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 08:30:07,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 08:30:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2760 transitions. [2023-08-27 08:30:07,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2828448452551752 [2023-08-27 08:30:07,683 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2760 transitions. [2023-08-27 08:30:07,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2760 transitions. [2023-08-27 08:30:07,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:07,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2760 transitions. [2023-08-27 08:30:07,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 81.17647058823529) internal successors, (2760), 34 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:07,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 287.0) internal successors, (10045), 35 states have internal predecessors, (10045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:07,703 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 287.0) internal successors, (10045), 35 states have internal predecessors, (10045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:07,703 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 354 flow. Second operand 34 states and 2760 transitions. [2023-08-27 08:30:07,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 226 transitions, 1793 flow [2023-08-27 08:30:07,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 226 transitions, 1793 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-27 08:30:07,713 INFO L231 Difference]: Finished difference. Result has 102 places, 95 transitions, 1197 flow [2023-08-27 08:30:07,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1197, PETRI_PLACES=102, PETRI_TRANSITIONS=95} [2023-08-27 08:30:07,713 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2023-08-27 08:30:07,713 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 95 transitions, 1197 flow [2023-08-27 08:30:07,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 76.24137931034483) internal successors, (2211), 29 states have internal predecessors, (2211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:07,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:07,714 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:07,723 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 08:30:07,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-27 08:30:07,923 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:30:07,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:07,923 INFO L85 PathProgramCache]: Analyzing trace with hash -302245329, now seen corresponding path program 4 times [2023-08-27 08:30:07,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:07,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963415397] [2023-08-27 08:30:07,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:07,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:07,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:08,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:08,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963415397] [2023-08-27 08:30:08,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963415397] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:08,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024047132] [2023-08-27 08:30:08,591 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:30:08,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:08,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:08,592 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 08:30:08,615 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 08:30:08,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:30:08,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:30:08,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 08:30:08,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:30:08,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:30:09,070 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 08:30:09,071 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 224 treesize of output 186 [2023-08-27 08:30:09,346 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:30:09,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024047132] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:30:09,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:30:09,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 5] total 20 [2023-08-27 08:30:09,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354066999] [2023-08-27 08:30:09,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:30:09,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 08:30:09,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:09,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 08:30:09,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2023-08-27 08:30:09,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 287 [2023-08-27 08:30:09,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 95 transitions, 1197 flow. Second operand has 22 states, 22 states have (on average 83.5909090909091) internal successors, (1839), 22 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:09,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:09,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 287 [2023-08-27 08:30:09,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:10,420 INFO L124 PetriNetUnfolderBase]: 849/1608 cut-off events. [2023-08-27 08:30:10,421 INFO L125 PetriNetUnfolderBase]: For 8595/8595 co-relation queries the response was YES. [2023-08-27 08:30:10,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7428 conditions, 1608 events. 849/1608 cut-off events. For 8595/8595 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9057 event pairs, 83 based on Foata normal form. 26/1631 useless extension candidates. Maximal degree in co-relation 7390. Up to 499 conditions per place. [2023-08-27 08:30:10,434 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 160 selfloop transitions, 63 changer transitions 6/229 dead transitions. [2023-08-27 08:30:10,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 229 transitions, 2669 flow [2023-08-27 08:30:10,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 08:30:10,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 08:30:10,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1877 transitions. [2023-08-27 08:30:10,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31143188982910236 [2023-08-27 08:30:10,437 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1877 transitions. [2023-08-27 08:30:10,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1877 transitions. [2023-08-27 08:30:10,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:10,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1877 transitions. [2023-08-27 08:30:10,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 89.38095238095238) internal successors, (1877), 21 states have internal predecessors, (1877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:10,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 287.0) internal successors, (6314), 22 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:10,448 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 287.0) internal successors, (6314), 22 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:10,448 INFO L175 Difference]: Start difference. First operand has 102 places, 95 transitions, 1197 flow. Second operand 21 states and 1877 transitions. [2023-08-27 08:30:10,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 229 transitions, 2669 flow [2023-08-27 08:30:10,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 229 transitions, 2215 flow, removed 218 selfloop flow, removed 6 redundant places. [2023-08-27 08:30:10,476 INFO L231 Difference]: Finished difference. Result has 121 places, 114 transitions, 1424 flow [2023-08-27 08:30:10,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1424, PETRI_PLACES=121, PETRI_TRANSITIONS=114} [2023-08-27 08:30:10,477 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 91 predicate places. [2023-08-27 08:30:10,477 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 114 transitions, 1424 flow [2023-08-27 08:30:10,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 83.5909090909091) internal successors, (1839), 22 states have internal predecessors, (1839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:10,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:10,478 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:10,485 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 08:30:10,683 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,SelfDestructingSolverStorable14 [2023-08-27 08:30:10,683 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:30:10,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:10,684 INFO L85 PathProgramCache]: Analyzing trace with hash -302275090, now seen corresponding path program 1 times [2023-08-27 08:30:10,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:10,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259677071] [2023-08-27 08:30:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:10,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:11,598 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:11,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:11,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259677071] [2023-08-27 08:30:11,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259677071] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:11,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518378827] [2023-08-27 08:30:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:11,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:11,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:11,601 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 08:30:11,602 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 08:30:11,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:11,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-27 08:30:11,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:12,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:12,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:30:12,324 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 08:30:12,324 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 213 treesize of output 184 [2023-08-27 08:30:12,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:12,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518378827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:30:12,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:30:12,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 23 [2023-08-27 08:30:12,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515089091] [2023-08-27 08:30:12,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:30:12,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 08:30:12,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:12,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 08:30:12,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2023-08-27 08:30:12,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 08:30:12,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 114 transitions, 1424 flow. Second operand has 25 states, 25 states have (on average 76.44) internal successors, (1911), 25 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:12,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:12,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 08:30:12,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:14,554 INFO L124 PetriNetUnfolderBase]: 747/1460 cut-off events. [2023-08-27 08:30:14,555 INFO L125 PetriNetUnfolderBase]: For 11244/11244 co-relation queries the response was YES. [2023-08-27 08:30:14,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6521 conditions, 1460 events. 747/1460 cut-off events. For 11244/11244 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8306 event pairs, 71 based on Foata normal form. 70/1529 useless extension candidates. Maximal degree in co-relation 6476. Up to 299 conditions per place. [2023-08-27 08:30:14,570 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 153 selfloop transitions, 66 changer transitions 6/225 dead transitions. [2023-08-27 08:30:14,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 225 transitions, 2414 flow [2023-08-27 08:30:14,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 08:30:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 08:30:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1978 transitions. [2023-08-27 08:30:14,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2871660859465738 [2023-08-27 08:30:14,575 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1978 transitions. [2023-08-27 08:30:14,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1978 transitions. [2023-08-27 08:30:14,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:14,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1978 transitions. [2023-08-27 08:30:14,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 82.41666666666667) internal successors, (1978), 24 states have internal predecessors, (1978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:14,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 287.0) internal successors, (7175), 25 states have internal predecessors, (7175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:14,587 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 287.0) internal successors, (7175), 25 states have internal predecessors, (7175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:14,587 INFO L175 Difference]: Start difference. First operand has 121 places, 114 transitions, 1424 flow. Second operand 24 states and 1978 transitions. [2023-08-27 08:30:14,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 225 transitions, 2414 flow [2023-08-27 08:30:14,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 225 transitions, 2217 flow, removed 58 selfloop flow, removed 15 redundant places. [2023-08-27 08:30:14,619 INFO L231 Difference]: Finished difference. Result has 130 places, 110 transitions, 1497 flow [2023-08-27 08:30:14,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1497, PETRI_PLACES=130, PETRI_TRANSITIONS=110} [2023-08-27 08:30:14,619 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 100 predicate places. [2023-08-27 08:30:14,619 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 110 transitions, 1497 flow [2023-08-27 08:30:14,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 76.44) internal successors, (1911), 25 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:14,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:14,620 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:14,626 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 08:30:14,826 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,SelfDestructingSolverStorable15 [2023-08-27 08:30:14,826 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:30:14,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:14,827 INFO L85 PathProgramCache]: Analyzing trace with hash -302245330, now seen corresponding path program 2 times [2023-08-27 08:30:14,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:14,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441080552] [2023-08-27 08:30:14,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:14,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:15,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:15,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:15,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441080552] [2023-08-27 08:30:15,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441080552] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:15,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753759046] [2023-08-27 08:30:15,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:30:15,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:15,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:15,404 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 08:30:15,410 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 08:30:15,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:30:15,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:30:15,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-27 08:30:15,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:15,572 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 08:30:15,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:30:15,618 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:30:15,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:30:15,663 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:30:15,865 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:15,866 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:30:16,680 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:30:16,681 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 124 treesize of output 88 [2023-08-27 08:30:16,754 INFO L322 Elim1Store]: treesize reduction 10, result has 86.3 percent of original size [2023-08-27 08:30:16,755 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 583 treesize of output 569 [2023-08-27 08:30:16,772 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:30:16,788 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:30:16,788 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 182 treesize of output 182 [2023-08-27 08:30:16,835 INFO L322 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2023-08-27 08:30:16,835 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 181 treesize of output 155 [2023-08-27 08:30:19,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:19,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753759046] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:30:19,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:30:19,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-27 08:30:19,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027895990] [2023-08-27 08:30:19,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:30:19,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:30:19,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:19,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:30:19,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=557, Unknown=1, NotChecked=0, Total=756 [2023-08-27 08:30:19,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 08:30:19,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 110 transitions, 1497 flow. Second operand has 28 states, 28 states have (on average 76.28571428571429) internal successors, (2136), 28 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:19,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:19,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 08:30:19,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:23,466 INFO L124 PetriNetUnfolderBase]: 843/1662 cut-off events. [2023-08-27 08:30:23,466 INFO L125 PetriNetUnfolderBase]: For 11909/11909 co-relation queries the response was YES. [2023-08-27 08:30:23,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7622 conditions, 1662 events. 843/1662 cut-off events. For 11909/11909 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 9736 event pairs, 187 based on Foata normal form. 35/1696 useless extension candidates. Maximal degree in co-relation 7578. Up to 779 conditions per place. [2023-08-27 08:30:23,483 INFO L140 encePairwiseOnDemand]: 277/287 looper letters, 185 selfloop transitions, 67 changer transitions 32/284 dead transitions. [2023-08-27 08:30:23,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 284 transitions, 2902 flow [2023-08-27 08:30:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 08:30:23,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 08:30:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 2789 transitions. [2023-08-27 08:30:23,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28581676573068254 [2023-08-27 08:30:23,492 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 2789 transitions. [2023-08-27 08:30:23,492 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 2789 transitions. [2023-08-27 08:30:23,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:23,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 2789 transitions. [2023-08-27 08:30:23,500 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 82.02941176470588) internal successors, (2789), 34 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:23,510 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 287.0) internal successors, (10045), 35 states have internal predecessors, (10045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:23,512 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 287.0) internal successors, (10045), 35 states have internal predecessors, (10045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:23,512 INFO L175 Difference]: Start difference. First operand has 130 places, 110 transitions, 1497 flow. Second operand 34 states and 2789 transitions. [2023-08-27 08:30:23,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 284 transitions, 2902 flow [2023-08-27 08:30:23,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 284 transitions, 2553 flow, removed 130 selfloop flow, removed 18 redundant places. [2023-08-27 08:30:23,558 INFO L231 Difference]: Finished difference. Result has 145 places, 122 transitions, 1599 flow [2023-08-27 08:30:23,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=1000, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1599, PETRI_PLACES=145, PETRI_TRANSITIONS=122} [2023-08-27 08:30:23,558 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 115 predicate places. [2023-08-27 08:30:23,559 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 122 transitions, 1599 flow [2023-08-27 08:30:23,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 76.28571428571429) internal successors, (2136), 28 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:23,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:23,559 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:23,565 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 08:30:23,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-27 08:30:23,765 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:30:23,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:23,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1600037551, now seen corresponding path program 5 times [2023-08-27 08:30:23,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:23,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287130528] [2023-08-27 08:30:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:23,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:23,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:23,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:30:23,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:23,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287130528] [2023-08-27 08:30:23,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287130528] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:23,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701278521] [2023-08-27 08:30:23,913 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:30:23,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:23,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:23,914 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 08:30:23,936 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 08:30:24,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:30:24,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:30:24,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 08:30:24,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:24,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:30:24,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:30:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:30:24,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701278521] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:30:24,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:30:24,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-27 08:30:24,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996012818] [2023-08-27 08:30:24,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:30:24,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 08:30:24,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:24,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 08:30:24,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2023-08-27 08:30:24,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 287 [2023-08-27 08:30:24,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 122 transitions, 1599 flow. Second operand has 18 states, 18 states have (on average 99.5) internal successors, (1791), 18 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:24,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:24,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 287 [2023-08-27 08:30:24,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:24,679 INFO L124 PetriNetUnfolderBase]: 575/1190 cut-off events. [2023-08-27 08:30:24,679 INFO L125 PetriNetUnfolderBase]: For 5579/5581 co-relation queries the response was YES. [2023-08-27 08:30:24,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5038 conditions, 1190 events. 575/1190 cut-off events. For 5579/5581 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 6809 event pairs, 178 based on Foata normal form. 12/1177 useless extension candidates. Maximal degree in co-relation 4992. Up to 709 conditions per place. [2023-08-27 08:30:24,688 INFO L140 encePairwiseOnDemand]: 282/287 looper letters, 102 selfloop transitions, 21 changer transitions 13/142 dead transitions. [2023-08-27 08:30:24,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 142 transitions, 1553 flow [2023-08-27 08:30:24,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 08:30:24,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 08:30:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1257 transitions. [2023-08-27 08:30:24,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36498257839721254 [2023-08-27 08:30:24,691 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1257 transitions. [2023-08-27 08:30:24,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1257 transitions. [2023-08-27 08:30:24,691 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:24,691 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1257 transitions. [2023-08-27 08:30:24,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 104.75) internal successors, (1257), 12 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:24,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 287.0) internal successors, (3731), 13 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:24,699 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 287.0) internal successors, (3731), 13 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:24,699 INFO L175 Difference]: Start difference. First operand has 145 places, 122 transitions, 1599 flow. Second operand 12 states and 1257 transitions. [2023-08-27 08:30:24,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 142 transitions, 1553 flow [2023-08-27 08:30:24,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 142 transitions, 1436 flow, removed 15 selfloop flow, removed 26 redundant places. [2023-08-27 08:30:24,721 INFO L231 Difference]: Finished difference. Result has 126 places, 95 transitions, 1060 flow [2023-08-27 08:30:24,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1060, PETRI_PLACES=126, PETRI_TRANSITIONS=95} [2023-08-27 08:30:24,722 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 96 predicate places. [2023-08-27 08:30:24,722 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 95 transitions, 1060 flow [2023-08-27 08:30:24,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 99.5) internal successors, (1791), 18 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:24,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:24,723 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:24,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-27 08:30:24,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:24,929 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:30:24,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:24,929 INFO L85 PathProgramCache]: Analyzing trace with hash -36008418, now seen corresponding path program 3 times [2023-08-27 08:30:24,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:24,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967350844] [2023-08-27 08:30:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:24,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:25,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:25,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967350844] [2023-08-27 08:30:25,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967350844] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:25,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013407502] [2023-08-27 08:30:25,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:30:25,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:25,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:25,569 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 08:30:25,571 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 08:30:25,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:30:25,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:30:25,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 08:30:25,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:30:25,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:30:26,209 INFO L322 Elim1Store]: treesize reduction 18, result has 63.3 percent of original size [2023-08-27 08:30:26,210 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 231 treesize of output 186 [2023-08-27 08:30:26,462 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:30:26,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013407502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:30:26,463 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:30:26,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 25 [2023-08-27 08:30:26,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71325343] [2023-08-27 08:30:26,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:30:26,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 08:30:26,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:26,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 08:30:26,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=622, Unknown=0, NotChecked=0, Total=702 [2023-08-27 08:30:26,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 287 [2023-08-27 08:30:26,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 95 transitions, 1060 flow. Second operand has 27 states, 27 states have (on average 83.51851851851852) internal successors, (2255), 27 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 08:30:26,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:26,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 287 [2023-08-27 08:30:26,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:30,810 INFO L124 PetriNetUnfolderBase]: 1659/3198 cut-off events. [2023-08-27 08:30:30,810 INFO L125 PetriNetUnfolderBase]: For 26275/26275 co-relation queries the response was YES. [2023-08-27 08:30:30,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15296 conditions, 3198 events. 1659/3198 cut-off events. For 26275/26275 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 20781 event pairs, 62 based on Foata normal form. 72/3269 useless extension candidates. Maximal degree in co-relation 15255. Up to 761 conditions per place. [2023-08-27 08:30:30,833 INFO L140 encePairwiseOnDemand]: 279/287 looper letters, 430 selfloop transitions, 202 changer transitions 0/632 dead transitions. [2023-08-27 08:30:30,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 632 transitions, 7043 flow [2023-08-27 08:30:30,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-08-27 08:30:30,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-08-27 08:30:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 6035 transitions. [2023-08-27 08:30:30,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3138488740964169 [2023-08-27 08:30:30,841 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 6035 transitions. [2023-08-27 08:30:30,841 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 6035 transitions. [2023-08-27 08:30:30,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:30,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 6035 transitions. [2023-08-27 08:30:30,850 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 90.07462686567165) internal successors, (6035), 67 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:30,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 287.0) internal successors, (19516), 68 states have internal predecessors, (19516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:30,865 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 287.0) internal successors, (19516), 68 states have internal predecessors, (19516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:30,865 INFO L175 Difference]: Start difference. First operand has 126 places, 95 transitions, 1060 flow. Second operand 67 states and 6035 transitions. [2023-08-27 08:30:30,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 632 transitions, 7043 flow [2023-08-27 08:30:30,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 632 transitions, 7004 flow, removed 0 selfloop flow, removed 10 redundant places. [2023-08-27 08:30:30,925 INFO L231 Difference]: Finished difference. Result has 194 places, 265 transitions, 4445 flow [2023-08-27 08:30:30,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=1005, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=4445, PETRI_PLACES=194, PETRI_TRANSITIONS=265} [2023-08-27 08:30:30,925 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 164 predicate places. [2023-08-27 08:30:30,925 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 265 transitions, 4445 flow [2023-08-27 08:30:30,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 83.51851851851852) internal successors, (2255), 27 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 08:30:30,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:30,926 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:30,934 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 08:30:31,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:31,135 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:30:31,135 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:31,135 INFO L85 PathProgramCache]: Analyzing trace with hash -415882012, now seen corresponding path program 6 times [2023-08-27 08:30:31,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:31,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141265633] [2023-08-27 08:30:31,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:31,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:31,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:30:31,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:31,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141265633] [2023-08-27 08:30:31,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141265633] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:31,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716841092] [2023-08-27 08:30:31,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:30:31,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:31,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:31,337 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 08:30:31,360 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 08:30:31,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 08:30:31,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:30:31,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 08:30:31,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:31,576 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:30:31,576 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 182 treesize of output 132 [2023-08-27 08:30:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:30:31,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:30:31,801 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 08:30:31,801 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 205 treesize of output 157 [2023-08-27 08:30:31,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:30:31,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716841092] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:30:31,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:30:31,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2023-08-27 08:30:31,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094881872] [2023-08-27 08:30:31,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:30:31,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:30:31,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:31,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:30:31,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:30:31,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 287 [2023-08-27 08:30:31,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 265 transitions, 4445 flow. Second operand has 17 states, 17 states have (on average 98.76470588235294) internal successors, (1679), 17 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:31,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:31,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 287 [2023-08-27 08:30:31,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:32,628 INFO L124 PetriNetUnfolderBase]: 2125/4072 cut-off events. [2023-08-27 08:30:32,628 INFO L125 PetriNetUnfolderBase]: For 61145/61145 co-relation queries the response was YES. [2023-08-27 08:30:32,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22466 conditions, 4072 events. 2125/4072 cut-off events. For 61145/61145 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27874 event pairs, 416 based on Foata normal form. 36/4107 useless extension candidates. Maximal degree in co-relation 22413. Up to 2075 conditions per place. [2023-08-27 08:30:32,658 INFO L140 encePairwiseOnDemand]: 281/287 looper letters, 270 selfloop transitions, 125 changer transitions 0/395 dead transitions. [2023-08-27 08:30:32,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 395 transitions, 6924 flow [2023-08-27 08:30:32,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 08:30:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 08:30:32,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1068 transitions. [2023-08-27 08:30:32,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37212543554006966 [2023-08-27 08:30:32,661 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1068 transitions. [2023-08-27 08:30:32,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1068 transitions. [2023-08-27 08:30:32,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:32,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1068 transitions. [2023-08-27 08:30:32,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 106.8) internal successors, (1068), 10 states have internal predecessors, (1068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:32,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 287.0) internal successors, (3157), 11 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:32,665 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 287.0) internal successors, (3157), 11 states have internal predecessors, (3157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:32,665 INFO L175 Difference]: Start difference. First operand has 194 places, 265 transitions, 4445 flow. Second operand 10 states and 1068 transitions. [2023-08-27 08:30:32,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 395 transitions, 6924 flow [2023-08-27 08:30:32,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 395 transitions, 5213 flow, removed 775 selfloop flow, removed 12 redundant places. [2023-08-27 08:30:32,922 INFO L231 Difference]: Finished difference. Result has 196 places, 324 transitions, 4335 flow [2023-08-27 08:30:32,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4335, PETRI_PLACES=196, PETRI_TRANSITIONS=324} [2023-08-27 08:30:32,923 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 166 predicate places. [2023-08-27 08:30:32,923 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 324 transitions, 4335 flow [2023-08-27 08:30:32,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 98.76470588235294) internal successors, (1679), 17 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:32,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:32,924 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:32,935 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 08:30:33,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:33,136 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:30:33,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:33,136 INFO L85 PathProgramCache]: Analyzing trace with hash -415851261, now seen corresponding path program 4 times [2023-08-27 08:30:33,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:33,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121729934] [2023-08-27 08:30:33,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:33,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:34,187 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 08:30:34,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:34,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121729934] [2023-08-27 08:30:34,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121729934] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:34,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292650048] [2023-08-27 08:30:34,188 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:30:34,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:34,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:34,193 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 08:30:34,204 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 08:30:34,305 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:30:34,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:30:34,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 08:30:34,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:34,393 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 08:30:34,460 INFO L322 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-08-27 08:30:34,461 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 1 case distinctions, treesize of input 29 treesize of output 32 [2023-08-27 08:30:34,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:30:34,558 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 35 [2023-08-27 08:30:34,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:30:34,651 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 35 [2023-08-27 08:30:35,064 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 08:30:35,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:30:35,875 INFO L322 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2023-08-27 08:30:35,875 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 105 [2023-08-27 08:30:35,913 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:30:35,913 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 587 treesize of output 583 [2023-08-27 08:30:35,956 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:30:35,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 182 treesize of output 192 [2023-08-27 08:30:35,986 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:30:35,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 181 treesize of output 165 [2023-08-27 08:30:42,007 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:42,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292650048] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:30:42,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:30:42,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-27 08:30:42,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627267069] [2023-08-27 08:30:42,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:30:42,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 08:30:42,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:42,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 08:30:42,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=967, Unknown=2, NotChecked=0, Total=1190 [2023-08-27 08:30:42,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 08:30:42,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 324 transitions, 4335 flow. Second operand has 35 states, 35 states have (on average 76.2) internal successors, (2667), 35 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:42,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:42,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 08:30:42,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:47,363 INFO L124 PetriNetUnfolderBase]: 2804/5336 cut-off events. [2023-08-27 08:30:47,364 INFO L125 PetriNetUnfolderBase]: For 78684/78684 co-relation queries the response was YES. [2023-08-27 08:30:47,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26699 conditions, 5336 events. 2804/5336 cut-off events. For 78684/78684 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 38452 event pairs, 704 based on Foata normal form. 17/5350 useless extension candidates. Maximal degree in co-relation 26644. Up to 2673 conditions per place. [2023-08-27 08:30:47,397 INFO L140 encePairwiseOnDemand]: 277/287 looper letters, 460 selfloop transitions, 166 changer transitions 4/630 dead transitions. [2023-08-27 08:30:47,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 630 transitions, 8136 flow [2023-08-27 08:30:47,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-27 08:30:47,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-27 08:30:47,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 3368 transitions. [2023-08-27 08:30:47,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2862241862836747 [2023-08-27 08:30:47,403 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 3368 transitions. [2023-08-27 08:30:47,403 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 3368 transitions. [2023-08-27 08:30:47,404 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:47,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 3368 transitions. [2023-08-27 08:30:47,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 82.14634146341463) internal successors, (3368), 41 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 08:30:47,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 287.0) internal successors, (12054), 42 states have internal predecessors, (12054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:47,417 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 287.0) internal successors, (12054), 42 states have internal predecessors, (12054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:47,417 INFO L175 Difference]: Start difference. First operand has 196 places, 324 transitions, 4335 flow. Second operand 41 states and 3368 transitions. [2023-08-27 08:30:47,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 630 transitions, 8136 flow [2023-08-27 08:30:47,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 630 transitions, 7997 flow, removed 42 selfloop flow, removed 4 redundant places. [2023-08-27 08:30:47,766 INFO L231 Difference]: Finished difference. Result has 251 places, 409 transitions, 6149 flow [2023-08-27 08:30:47,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=4209, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=6149, PETRI_PLACES=251, PETRI_TRANSITIONS=409} [2023-08-27 08:30:47,766 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 221 predicate places. [2023-08-27 08:30:47,766 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 409 transitions, 6149 flow [2023-08-27 08:30:47,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 76.2) internal successors, (2667), 35 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:47,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:47,767 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:47,772 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 08:30:47,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:47,969 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:30:47,969 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:47,969 INFO L85 PathProgramCache]: Analyzing trace with hash -36038177, now seen corresponding path program 7 times [2023-08-27 08:30:47,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:47,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855517228] [2023-08-27 08:30:47,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:47,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:49,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:49,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:49,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855517228] [2023-08-27 08:30:49,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855517228] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:49,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972063455] [2023-08-27 08:30:49,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:30:49,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:49,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:49,006 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 08:30:49,008 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 08:30:49,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:49,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 08:30:49,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:49,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:30:50,077 INFO L322 Elim1Store]: treesize reduction 56, result has 45.6 percent of original size [2023-08-27 08:30:50,077 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 293 treesize of output 229 [2023-08-27 08:30:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:50,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972063455] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:30:50,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:30:50,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 33 [2023-08-27 08:30:50,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238746483] [2023-08-27 08:30:50,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:30:50,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 08:30:50,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:30:50,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 08:30:50,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2023-08-27 08:30:50,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 08:30:50,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 409 transitions, 6149 flow. Second operand has 35 states, 35 states have (on average 76.28571428571429) internal successors, (2670), 35 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 08:30:50,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:30:50,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 08:30:50,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:30:55,620 INFO L124 PetriNetUnfolderBase]: 5218/9790 cut-off events. [2023-08-27 08:30:55,620 INFO L125 PetriNetUnfolderBase]: For 217691/217691 co-relation queries the response was YES. [2023-08-27 08:30:55,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55343 conditions, 9790 events. 5218/9790 cut-off events. For 217691/217691 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 75922 event pairs, 601 based on Foata normal form. 190/9978 useless extension candidates. Maximal degree in co-relation 55268. Up to 2370 conditions per place. [2023-08-27 08:30:55,694 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 651 selfloop transitions, 334 changer transitions 3/988 dead transitions. [2023-08-27 08:30:55,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 988 transitions, 15751 flow [2023-08-27 08:30:55,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-27 08:30:55,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-27 08:30:55,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3121 transitions. [2023-08-27 08:30:55,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28617274894553457 [2023-08-27 08:30:55,701 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3121 transitions. [2023-08-27 08:30:55,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3121 transitions. [2023-08-27 08:30:55,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:30:55,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3121 transitions. [2023-08-27 08:30:55,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 82.13157894736842) internal successors, (3121), 38 states have internal predecessors, (3121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:55,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 287.0) internal successors, (11193), 39 states have internal predecessors, (11193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:55,713 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 287.0) internal successors, (11193), 39 states have internal predecessors, (11193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:30:55,713 INFO L175 Difference]: Start difference. First operand has 251 places, 409 transitions, 6149 flow. Second operand 38 states and 3121 transitions. [2023-08-27 08:30:55,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 988 transitions, 15751 flow [2023-08-27 08:30:56,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 988 transitions, 15516 flow, removed 90 selfloop flow, removed 12 redundant places. [2023-08-27 08:30:56,539 INFO L231 Difference]: Finished difference. Result has 298 places, 623 transitions, 11473 flow [2023-08-27 08:30:56,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=5983, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=11473, PETRI_PLACES=298, PETRI_TRANSITIONS=623} [2023-08-27 08:30:56,540 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 268 predicate places. [2023-08-27 08:30:56,540 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 623 transitions, 11473 flow [2023-08-27 08:30:56,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 76.28571428571429) internal successors, (2670), 35 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 08:30:56,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:30:56,540 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:30:56,545 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 08:30:56,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:56,741 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:30:56,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:30:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash -36038178, now seen corresponding path program 5 times [2023-08-27 08:30:56,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:30:56,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883184338] [2023-08-27 08:30:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:30:56,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:30:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:30:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:57,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:30:57,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883184338] [2023-08-27 08:30:57,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883184338] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:30:57,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129269399] [2023-08-27 08:30:57,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:30:57,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:30:57,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:30:57,705 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 08:30:57,743 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 08:30:57,857 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:30:57,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:30:57,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 08:30:57,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:30:57,981 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 08:30:58,027 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 08:30:58,067 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 08:30:58,498 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:30:58,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:30:59,497 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:30:59,498 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 183 treesize of output 123 [2023-08-27 08:30:59,575 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-27 08:30:59,576 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 800 treesize of output 750 [2023-08-27 08:30:59,596 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:30:59,599 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:30:59,600 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:30:59,636 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:30:59,636 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 258 treesize of output 272 [2023-08-27 08:30:59,711 INFO L322 Elim1Store]: treesize reduction 30, result has 64.7 percent of original size [2023-08-27 08:30:59,712 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 257 treesize of output 231 [2023-08-27 08:31:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:31:01,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2129269399] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:31:01,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:31:01,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-27 08:31:01,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531162921] [2023-08-27 08:31:01,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:31:01,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-27 08:31:01,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:31:01,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-27 08:31:01,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1167, Unknown=4, NotChecked=0, Total=1406 [2023-08-27 08:31:01,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 08:31:01,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 623 transitions, 11473 flow. Second operand has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:31:01,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:31:01,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 08:31:01,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:31:11,202 INFO L124 PetriNetUnfolderBase]: 6343/11953 cut-off events. [2023-08-27 08:31:11,202 INFO L125 PetriNetUnfolderBase]: For 350294/350294 co-relation queries the response was YES. [2023-08-27 08:31:11,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72572 conditions, 11953 events. 6343/11953 cut-off events. For 350294/350294 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 95529 event pairs, 1034 based on Foata normal form. 210/12162 useless extension candidates. Maximal degree in co-relation 72473. Up to 3147 conditions per place. [2023-08-27 08:31:11,306 INFO L140 encePairwiseOnDemand]: 277/287 looper letters, 584 selfloop transitions, 489 changer transitions 8/1081 dead transitions. [2023-08-27 08:31:11,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 1081 transitions, 19935 flow [2023-08-27 08:31:11,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-27 08:31:11,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-27 08:31:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4431 transitions. [2023-08-27 08:31:11,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2859078590785908 [2023-08-27 08:31:11,312 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4431 transitions. [2023-08-27 08:31:11,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4431 transitions. [2023-08-27 08:31:11,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:31:11,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4431 transitions. [2023-08-27 08:31:11,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 82.05555555555556) internal successors, (4431), 54 states have internal predecessors, (4431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:31:11,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 287.0) internal successors, (15785), 55 states have internal predecessors, (15785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:31:11,329 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 287.0) internal successors, (15785), 55 states have internal predecessors, (15785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:31:11,329 INFO L175 Difference]: Start difference. First operand has 298 places, 623 transitions, 11473 flow. Second operand 54 states and 4431 transitions. [2023-08-27 08:31:11,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 1081 transitions, 19935 flow [2023-08-27 08:31:13,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1081 transitions, 17854 flow, removed 998 selfloop flow, removed 16 redundant places. [2023-08-27 08:31:13,115 INFO L231 Difference]: Finished difference. Result has 352 places, 757 transitions, 14917 flow [2023-08-27 08:31:13,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=9572, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=359, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=14917, PETRI_PLACES=352, PETRI_TRANSITIONS=757} [2023-08-27 08:31:13,116 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 322 predicate places. [2023-08-27 08:31:13,116 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 757 transitions, 14917 flow [2023-08-27 08:31:13,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:31:13,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:31:13,117 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:31:13,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-27 08:31:13,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:31:13,317 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:31:13,318 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:31:13,318 INFO L85 PathProgramCache]: Analyzing trace with hash -7438818, now seen corresponding path program 6 times [2023-08-27 08:31:13,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:31:13,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570745572] [2023-08-27 08:31:13,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:31:13,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:31:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:31:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:31:14,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:31:14,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570745572] [2023-08-27 08:31:14,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570745572] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:31:14,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574793973] [2023-08-27 08:31:14,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:31:14,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:31:14,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:31:14,269 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:31:14,295 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 08:31:14,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 08:31:14,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:31:14,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-27 08:31:14,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:31:14,586 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 13 treesize of output 9 [2023-08-27 08:31:14,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:31:14,648 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 08:31:14,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:31:14,712 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 08:31:15,189 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:31:15,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:31:16,433 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:31:16,433 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 182 treesize of output 122 [2023-08-27 08:31:16,564 INFO L322 Elim1Store]: treesize reduction 48, result has 69.4 percent of original size [2023-08-27 08:31:16,565 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 389 treesize of output 438 [2023-08-27 08:31:16,628 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-27 08:31:16,629 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 325 treesize of output 301 [2023-08-27 08:31:16,696 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-27 08:31:16,696 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 216 treesize of output 231 [2023-08-27 08:31:27,431 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:31:27,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574793973] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:31:27,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:31:27,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-27 08:31:27,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558978957] [2023-08-27 08:31:27,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:31:27,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-27 08:31:27,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:31:27,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-27 08:31:27,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1108, Unknown=1, NotChecked=0, Total=1406 [2023-08-27 08:31:27,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 08:31:27,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 757 transitions, 14917 flow. Second operand has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:31:27,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:31:27,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 08:31:27,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:31:43,132 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 08:31:45,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:31:47,154 WARN L539 Checker$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 08:31:55,218 INFO L124 PetriNetUnfolderBase]: 8109/15338 cut-off events. [2023-08-27 08:31:55,218 INFO L125 PetriNetUnfolderBase]: For 397279/397279 co-relation queries the response was YES. [2023-08-27 08:31:55,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96484 conditions, 15338 events. 8109/15338 cut-off events. For 397279/397279 co-relation queries the response was YES. Maximal size of possible extension queue 840. Compared 130965 event pairs, 2046 based on Foata normal form. 106/15443 useless extension candidates. Maximal degree in co-relation 96373. Up to 8737 conditions per place. [2023-08-27 08:31:55,397 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 793 selfloop transitions, 577 changer transitions 3/1373 dead transitions. [2023-08-27 08:31:55,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 1373 transitions, 27053 flow [2023-08-27 08:31:55,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-08-27 08:31:55,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2023-08-27 08:31:55,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 5429 transitions. [2023-08-27 08:31:55,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2866117622215183 [2023-08-27 08:31:55,403 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 5429 transitions. [2023-08-27 08:31:55,404 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 5429 transitions. [2023-08-27 08:31:55,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:31:55,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 5429 transitions. [2023-08-27 08:31:55,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 82.25757575757575) internal successors, (5429), 66 states have internal predecessors, (5429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:31:55,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 287.0) internal successors, (19229), 67 states have internal predecessors, (19229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:31:55,423 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 287.0) internal successors, (19229), 67 states have internal predecessors, (19229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:31:55,423 INFO L175 Difference]: Start difference. First operand has 352 places, 757 transitions, 14917 flow. Second operand 66 states and 5429 transitions. [2023-08-27 08:31:55,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 1373 transitions, 27053 flow [2023-08-27 08:31:58,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1373 transitions, 25646 flow, removed 579 selfloop flow, removed 26 redundant places. [2023-08-27 08:31:58,308 INFO L231 Difference]: Finished difference. Result has 412 places, 1047 transitions, 23242 flow [2023-08-27 08:31:58,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=13490, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=741, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=315, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=23242, PETRI_PLACES=412, PETRI_TRANSITIONS=1047} [2023-08-27 08:31:58,310 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 382 predicate places. [2023-08-27 08:31:58,310 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1047 transitions, 23242 flow [2023-08-27 08:31:58,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:31:58,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:31:58,311 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:31:58,318 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 08:31:58,518 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,SelfDestructingSolverStorable23 [2023-08-27 08:31:58,519 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:31:58,519 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:31:58,519 INFO L85 PathProgramCache]: Analyzing trace with hash -7409057, now seen corresponding path program 8 times [2023-08-27 08:31:58,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:31:58,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481258545] [2023-08-27 08:31:58,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:31:58,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:31:58,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:32:00,005 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:32:00,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:32:00,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481258545] [2023-08-27 08:32:00,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481258545] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:32:00,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648694266] [2023-08-27 08:32:00,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:32:00,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:32:00,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:32:00,010 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 08:32:00,014 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 08:32:00,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:32:00,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:32:00,154 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-27 08:32:00,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:32:00,242 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 08:32:00,284 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 18 [2023-08-27 08:32:00,327 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 18 [2023-08-27 08:32:00,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:32:00,368 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 08:32:00,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:32:00,431 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 08:32:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:32:00,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:32:01,926 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:32:01,926 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 3 case distinctions, treesize of input 278 treesize of output 148 [2023-08-27 08:32:02,000 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:32:02,000 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 803 treesize of output 831 [2023-08-27 08:32:02,066 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:32:02,066 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 256 treesize of output 300 [2023-08-27 08:32:02,134 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:32:02,135 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 255 treesize of output 259 [2023-08-27 08:32:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:32:15,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648694266] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:32:15,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:32:15,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-27 08:32:15,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247598244] [2023-08-27 08:32:15,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:32:15,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-27 08:32:15,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:32:15,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-27 08:32:15,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1145, Unknown=4, NotChecked=0, Total=1406 [2023-08-27 08:32:15,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 08:32:15,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1047 transitions, 23242 flow. Second operand has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:32:15,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:32:15,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 08:32:15,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:32:18,922 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:32:20,931 WARN L539 Checker$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 08:32:31,582 WARN L234 SmtUtils]: Spent 8.34s on a formula simplification that was a NOOP. DAG size: 112 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:32:39,375 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:32:45,499 WARN L539 Checker$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 08:32:47,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:32:49,542 WARN L539 Checker$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 08:32:56,449 WARN L234 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 138 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:33:09,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:33:11,364 WARN L539 Checker$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 08:33:13,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:33:21,612 WARN L539 Checker$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 08:33:23,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:33:25,644 WARN L539 Checker$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 08:33:27,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:33:29,948 WARN L539 Checker$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 08:33:31,957 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:33:34,189 WARN L539 Checker$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 08:33:36,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:33:38,208 WARN L539 Checker$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 08:33:44,906 INFO L124 PetriNetUnfolderBase]: 8529/16127 cut-off events. [2023-08-27 08:33:44,906 INFO L125 PetriNetUnfolderBase]: For 488398/488398 co-relation queries the response was YES. [2023-08-27 08:33:45,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105658 conditions, 16127 events. 8529/16127 cut-off events. For 488398/488398 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 139145 event pairs, 2428 based on Foata normal form. 129/16255 useless extension candidates. Maximal degree in co-relation 105527. Up to 9967 conditions per place. [2023-08-27 08:33:45,105 INFO L140 encePairwiseOnDemand]: 277/287 looper letters, 1126 selfloop transitions, 293 changer transitions 24/1443 dead transitions. [2023-08-27 08:33:45,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 1443 transitions, 29836 flow [2023-08-27 08:33:45,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-27 08:33:45,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-27 08:33:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4788 transitions. [2023-08-27 08:33:45,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.287636669470143 [2023-08-27 08:33:45,110 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4788 transitions. [2023-08-27 08:33:45,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4788 transitions. [2023-08-27 08:33:45,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:33:45,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4788 transitions. [2023-08-27 08:33:45,117 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 82.55172413793103) internal successors, (4788), 58 states have internal predecessors, (4788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:33:45,127 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 287.0) internal successors, (16933), 59 states have internal predecessors, (16933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:33:45,129 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 287.0) internal successors, (16933), 59 states have internal predecessors, (16933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:33:45,129 INFO L175 Difference]: Start difference. First operand has 412 places, 1047 transitions, 23242 flow. Second operand 58 states and 4788 transitions. [2023-08-27 08:33:45,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 1443 transitions, 29836 flow [2023-08-27 08:33:49,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1443 transitions, 26475 flow, removed 1525 selfloop flow, removed 26 redundant places. [2023-08-27 08:33:49,840 INFO L231 Difference]: Finished difference. Result has 453 places, 1069 transitions, 21925 flow [2023-08-27 08:33:49,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=19648, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=740, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=21925, PETRI_PLACES=453, PETRI_TRANSITIONS=1069} [2023-08-27 08:33:49,841 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 423 predicate places. [2023-08-27 08:33:49,841 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 1069 transitions, 21925 flow [2023-08-27 08:33:49,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:33:49,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:33:49,842 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:33:49,857 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 08:33:50,047 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,SelfDestructingSolverStorable24 [2023-08-27 08:33:50,048 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:33:50,048 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:33:50,048 INFO L85 PathProgramCache]: Analyzing trace with hash -7409058, now seen corresponding path program 7 times [2023-08-27 08:33:50,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:33:50,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938503656] [2023-08-27 08:33:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:33:50,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:33:50,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:33:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:33:51,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:33:51,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938503656] [2023-08-27 08:33:51,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938503656] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:33:51,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29874502] [2023-08-27 08:33:51,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:33:51,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:33:51,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:33:51,003 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 08:33:51,005 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 08:33:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:33:51,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 08:33:51,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:33:51,315 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 08:33:51,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:33:51,395 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:33:51,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:33:51,475 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 08:33:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:33:51,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:33:53,237 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:33:53,238 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 183 treesize of output 123 [2023-08-27 08:33:53,369 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:33:53,369 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 393 treesize of output 473 [2023-08-27 08:33:53,460 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:33:53,461 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 328 treesize of output 332 [2023-08-27 08:33:53,549 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:33:53,550 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 217 treesize of output 261 [2023-08-27 08:34:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:34:49,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29874502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:34:49,187 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:34:49,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-27 08:34:49,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430155184] [2023-08-27 08:34:49,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:34:49,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-27 08:34:49,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:34:49,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-27 08:34:49,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=1179, Unknown=2, NotChecked=0, Total=1406 [2023-08-27 08:34:49,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 08:34:49,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 1069 transitions, 21925 flow. Second operand has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:34:49,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:34:49,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 08:34:49,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:35:18,690 INFO L124 PetriNetUnfolderBase]: 10077/19053 cut-off events. [2023-08-27 08:35:18,690 INFO L125 PetriNetUnfolderBase]: For 735961/735961 co-relation queries the response was YES. [2023-08-27 08:35:18,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122358 conditions, 19053 events. 10077/19053 cut-off events. For 735961/735961 co-relation queries the response was YES. Maximal size of possible extension queue 1118. Compared 168785 event pairs, 2208 based on Foata normal form. 338/19390 useless extension candidates. Maximal degree in co-relation 122220. Up to 7867 conditions per place. [2023-08-27 08:35:18,931 INFO L140 encePairwiseOnDemand]: 277/287 looper letters, 1081 selfloop transitions, 630 changer transitions 41/1752 dead transitions. [2023-08-27 08:35:18,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 1752 transitions, 34941 flow [2023-08-27 08:35:18,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-27 08:35:18,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-27 08:35:18,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 6309 transitions. [2023-08-27 08:35:18,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2892444525949019 [2023-08-27 08:35:18,936 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 6309 transitions. [2023-08-27 08:35:18,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 6309 transitions. [2023-08-27 08:35:18,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:35:18,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 6309 transitions. [2023-08-27 08:35:18,943 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 83.01315789473684) internal successors, (6309), 76 states have internal predecessors, (6309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:35:18,957 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 287.0) internal successors, (22099), 77 states have internal predecessors, (22099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:35:18,959 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 287.0) internal successors, (22099), 77 states have internal predecessors, (22099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:35:18,959 INFO L175 Difference]: Start difference. First operand has 453 places, 1069 transitions, 21925 flow. Second operand 76 states and 6309 transitions. [2023-08-27 08:35:18,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 1752 transitions, 34941 flow [2023-08-27 08:35:24,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 1752 transitions, 34203 flow, removed 228 selfloop flow, removed 31 redundant places. [2023-08-27 08:35:24,837 INFO L231 Difference]: Finished difference. Result has 522 places, 1269 transitions, 29297 flow [2023-08-27 08:35:24,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=20495, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1035, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=29297, PETRI_PLACES=522, PETRI_TRANSITIONS=1269} [2023-08-27 08:35:24,838 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 492 predicate places. [2023-08-27 08:35:24,838 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 1269 transitions, 29297 flow [2023-08-27 08:35:24,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:35:24,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:35:24,839 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:35:24,843 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 08:35:25,039 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,SelfDestructingSolverStorable25 [2023-08-27 08:35:25,039 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:35:25,039 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:35:25,039 INFO L85 PathProgramCache]: Analyzing trace with hash -6486498, now seen corresponding path program 8 times [2023-08-27 08:35:25,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:35:25,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644921233] [2023-08-27 08:35:25,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:35:25,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:35:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:35:26,461 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:35:26,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:35:26,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644921233] [2023-08-27 08:35:26,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644921233] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:35:26,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248484775] [2023-08-27 08:35:26,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:35:26,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:35:26,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:35:26,462 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 08:35:26,464 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 08:35:26,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:35:26,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:35:26,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-27 08:35:26,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:35:26,754 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 08:35:26,832 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 08:35:26,891 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 08:35:27,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:35:27,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:35:29,277 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:35:29,277 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 275 treesize of output 179 [2023-08-27 08:35:29,347 INFO L322 Elim1Store]: treesize reduction 71, result has 16.5 percent of original size [2023-08-27 08:35:29,347 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1206 treesize of output 1061 [2023-08-27 08:35:29,397 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:35:29,398 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:35:29,398 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:35:29,399 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:35:29,399 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:35:29,399 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:35:29,400 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:35:29,400 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:35:29,401 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:35:29,401 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 15 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 331 treesize of output 270 [2023-08-27 08:35:29,424 INFO L322 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2023-08-27 08:35:29,424 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 349 treesize of output 227 [2023-08-27 08:35:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:35:29,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248484775] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:35:29,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:35:29,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-27 08:35:29,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591771182] [2023-08-27 08:35:29,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:35:29,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-27 08:35:29,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:35:29,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-27 08:35:29,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=1092, Unknown=1, NotChecked=0, Total=1406 [2023-08-27 08:35:29,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 08:35:29,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 1269 transitions, 29297 flow. Second operand has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:35:29,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:35:29,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 08:35:29,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:35:47,406 INFO L124 PetriNetUnfolderBase]: 8501/16114 cut-off events. [2023-08-27 08:35:47,406 INFO L125 PetriNetUnfolderBase]: For 691468/691468 co-relation queries the response was YES. [2023-08-27 08:35:47,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111825 conditions, 16114 events. 8501/16114 cut-off events. For 691468/691468 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 139552 event pairs, 2392 based on Foata normal form. 84/16197 useless extension candidates. Maximal degree in co-relation 111665. Up to 11273 conditions per place. [2023-08-27 08:35:47,643 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 954 selfloop transitions, 420 changer transitions 20/1394 dead transitions. [2023-08-27 08:35:47,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 1394 transitions, 30326 flow [2023-08-27 08:35:47,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-27 08:35:47,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-27 08:35:47,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 4804 transitions. [2023-08-27 08:35:47,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2885978613480716 [2023-08-27 08:35:47,648 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 4804 transitions. [2023-08-27 08:35:47,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 4804 transitions. [2023-08-27 08:35:47,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:35:47,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 4804 transitions. [2023-08-27 08:35:47,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 82.82758620689656) internal successors, (4804), 58 states have internal predecessors, (4804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:35:47,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 287.0) internal successors, (16933), 59 states have internal predecessors, (16933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:35:47,666 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 287.0) internal successors, (16933), 59 states have internal predecessors, (16933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:35:47,666 INFO L175 Difference]: Start difference. First operand has 522 places, 1269 transitions, 29297 flow. Second operand 58 states and 4804 transitions. [2023-08-27 08:35:47,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 1394 transitions, 30326 flow [2023-08-27 08:35:53,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 1394 transitions, 26030 flow, removed 1801 selfloop flow, removed 61 redundant places. [2023-08-27 08:35:53,078 INFO L231 Difference]: Finished difference. Result has 501 places, 1045 transitions, 22697 flow [2023-08-27 08:35:53,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=19027, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=965, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=351, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=22697, PETRI_PLACES=501, PETRI_TRANSITIONS=1045} [2023-08-27 08:35:53,079 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 471 predicate places. [2023-08-27 08:35:53,079 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 1045 transitions, 22697 flow [2023-08-27 08:35:53,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 76.1842105263158) internal successors, (2895), 38 states have internal predecessors, (2895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:35:53,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:35:53,080 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:35:53,088 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 08:35:53,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:35:53,285 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:35:53,286 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:35:53,286 INFO L85 PathProgramCache]: Analyzing trace with hash -6486497, now seen corresponding path program 9 times [2023-08-27 08:35:53,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:35:53,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338011570] [2023-08-27 08:35:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:35:53,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:35:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:35:54,493 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:35:54,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:35:54,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338011570] [2023-08-27 08:35:54,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338011570] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:35:54,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784767048] [2023-08-27 08:35:54,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:35:54,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:35:54,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:35:54,495 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 08:35:54,497 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 08:35:54,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:35:54,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:35:54,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 08:35:54,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:35:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:35:55,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:35:55,725 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-27 08:35:55,725 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 262 treesize of output 245 [2023-08-27 08:35:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 08:35:57,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784767048] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:35:57,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:35:57,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 26 [2023-08-27 08:35:57,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155003644] [2023-08-27 08:35:57,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:35:57,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:35:57,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:35:57,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:35:57,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2023-08-27 08:35:57,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 08:35:57,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 1045 transitions, 22697 flow. Second operand has 28 states, 28 states have (on average 76.46428571428571) internal successors, (2141), 28 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:35:57,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:35:57,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 08:35:57,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:36:08,682 INFO L124 PetriNetUnfolderBase]: 8797/16666 cut-off events. [2023-08-27 08:36:08,682 INFO L125 PetriNetUnfolderBase]: For 592797/592797 co-relation queries the response was YES. [2023-08-27 08:36:08,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106755 conditions, 16666 events. 8797/16666 cut-off events. For 592797/592797 co-relation queries the response was YES. Maximal size of possible extension queue 1025. Compared 145405 event pairs, 2803 based on Foata normal form. 72/16737 useless extension candidates. Maximal degree in co-relation 106600. Up to 11193 conditions per place. [2023-08-27 08:36:08,924 INFO L140 encePairwiseOnDemand]: 279/287 looper letters, 1047 selfloop transitions, 213 changer transitions 20/1280 dead transitions. [2023-08-27 08:36:08,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 1280 transitions, 27220 flow [2023-08-27 08:36:08,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 08:36:08,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 08:36:08,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2654 transitions. [2023-08-27 08:36:08,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2889808362369338 [2023-08-27 08:36:08,927 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2654 transitions. [2023-08-27 08:36:08,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2654 transitions. [2023-08-27 08:36:08,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:36:08,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2654 transitions. [2023-08-27 08:36:08,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 82.9375) internal successors, (2654), 32 states have internal predecessors, (2654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:08,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 287.0) internal successors, (9471), 33 states have internal predecessors, (9471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:08,935 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 287.0) internal successors, (9471), 33 states have internal predecessors, (9471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:08,935 INFO L175 Difference]: Start difference. First operand has 501 places, 1045 transitions, 22697 flow. Second operand 32 states and 2654 transitions. [2023-08-27 08:36:08,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 1280 transitions, 27220 flow [2023-08-27 08:36:13,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 1280 transitions, 26415 flow, removed 200 selfloop flow, removed 39 redundant places. [2023-08-27 08:36:13,874 INFO L231 Difference]: Finished difference. Result has 498 places, 1058 transitions, 22967 flow [2023-08-27 08:36:13,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=21439, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1026, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=819, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=22967, PETRI_PLACES=498, PETRI_TRANSITIONS=1058} [2023-08-27 08:36:13,877 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 468 predicate places. [2023-08-27 08:36:13,877 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 1058 transitions, 22967 flow [2023-08-27 08:36:13,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 76.46428571428571) internal successors, (2141), 28 states have internal predecessors, (2141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:13,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:36:13,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:36:13,887 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-08-27 08:36:14,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-27 08:36:14,087 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:36:14,087 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:36:14,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1113053936, now seen corresponding path program 1 times [2023-08-27 08:36:14,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:36:14,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591004190] [2023-08-27 08:36:14,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:36:14,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:36:14,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:36:14,720 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 08:36:14,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:36:14,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591004190] [2023-08-27 08:36:14,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591004190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:36:14,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591276080] [2023-08-27 08:36:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:36:14,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:36:14,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:36:14,722 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 08:36:14,725 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 08:36:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:36:14,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 08:36:14,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:36:15,110 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 08:36:15,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:36:15,220 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:36:15,221 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 74 treesize of output 50 [2023-08-27 08:36:15,670 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 08:36:15,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591276080] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:36:15,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:36:15,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 18 [2023-08-27 08:36:15,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251139466] [2023-08-27 08:36:15,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:36:15,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:36:15,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:36:15,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:36:15,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-08-27 08:36:15,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 287 [2023-08-27 08:36:15,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 1058 transitions, 22967 flow. Second operand has 20 states, 20 states have (on average 84.15) internal successors, (1683), 20 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:15,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:36:15,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 287 [2023-08-27 08:36:15,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:36:23,481 INFO L124 PetriNetUnfolderBase]: 8785/16579 cut-off events. [2023-08-27 08:36:23,481 INFO L125 PetriNetUnfolderBase]: For 581370/581370 co-relation queries the response was YES. [2023-08-27 08:36:23,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106647 conditions, 16579 events. 8785/16579 cut-off events. For 581370/581370 co-relation queries the response was YES. Maximal size of possible extension queue 979. Compared 143222 event pairs, 3080 based on Foata normal form. 67/16645 useless extension candidates. Maximal degree in co-relation 106486. Up to 14457 conditions per place. [2023-08-27 08:36:23,685 INFO L140 encePairwiseOnDemand]: 280/287 looper letters, 991 selfloop transitions, 73 changer transitions 59/1123 dead transitions. [2023-08-27 08:36:23,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1123 transitions, 25423 flow [2023-08-27 08:36:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 08:36:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 08:36:23,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1330 transitions. [2023-08-27 08:36:23,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3089430894308943 [2023-08-27 08:36:23,688 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1330 transitions. [2023-08-27 08:36:23,688 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1330 transitions. [2023-08-27 08:36:23,688 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:36:23,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1330 transitions. [2023-08-27 08:36:23,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 88.66666666666667) internal successors, (1330), 15 states have internal predecessors, (1330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:23,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 287.0) internal successors, (4592), 16 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:23,693 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 287.0) internal successors, (4592), 16 states have internal predecessors, (4592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:23,693 INFO L175 Difference]: Start difference. First operand has 498 places, 1058 transitions, 22967 flow. Second operand 15 states and 1330 transitions. [2023-08-27 08:36:23,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1123 transitions, 25423 flow [2023-08-27 08:36:28,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 1123 transitions, 24767 flow, removed 191 selfloop flow, removed 25 redundant places. [2023-08-27 08:36:28,558 INFO L231 Difference]: Finished difference. Result has 485 places, 1048 transitions, 22444 flow [2023-08-27 08:36:28,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=22268, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=982, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=22444, PETRI_PLACES=485, PETRI_TRANSITIONS=1048} [2023-08-27 08:36:28,559 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 455 predicate places. [2023-08-27 08:36:28,559 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 1048 transitions, 22444 flow [2023-08-27 08:36:28,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 84.15) internal successors, (1683), 20 states have internal predecessors, (1683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:28,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:36:28,559 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:36:28,564 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 08:36:28,761 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,SelfDestructingSolverStorable28 [2023-08-27 08:36:28,761 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:36:28,762 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:36:28,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2113304110, now seen corresponding path program 9 times [2023-08-27 08:36:28,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:36:28,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958570989] [2023-08-27 08:36:28,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:36:28,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:36:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:36:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:36:30,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:36:30,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958570989] [2023-08-27 08:36:30,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958570989] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:36:30,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028763324] [2023-08-27 08:36:30,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:36:30,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:36:30,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:36:30,935 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 08:36:30,937 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 08:36:31,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:36:31,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:36:31,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 08:36:31,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:36:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-27 08:36:31,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:36:31,864 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 08:36:31,865 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 227 treesize of output 189 [2023-08-27 08:36:32,312 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-27 08:36:32,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028763324] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:36:32,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:36:32,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 21 [2023-08-27 08:36:32,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229663720] [2023-08-27 08:36:32,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:36:32,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 08:36:32,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:36:32,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 08:36:32,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2023-08-27 08:36:32,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 287 [2023-08-27 08:36:32,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 1048 transitions, 22444 flow. Second operand has 23 states, 23 states have (on average 83.65217391304348) internal successors, (1924), 23 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:32,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:36:32,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 287 [2023-08-27 08:36:32,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:36:40,639 INFO L124 PetriNetUnfolderBase]: 9164/17235 cut-off events. [2023-08-27 08:36:40,640 INFO L125 PetriNetUnfolderBase]: For 610507/610507 co-relation queries the response was YES. [2023-08-27 08:36:40,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111481 conditions, 17235 events. 9164/17235 cut-off events. For 610507/610507 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 149926 event pairs, 2853 based on Foata normal form. 36/17270 useless extension candidates. Maximal degree in co-relation 111328. Up to 11531 conditions per place. [2023-08-27 08:36:40,919 INFO L140 encePairwiseOnDemand]: 279/287 looper letters, 910 selfloop transitions, 265 changer transitions 34/1209 dead transitions. [2023-08-27 08:36:40,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 1209 transitions, 26755 flow [2023-08-27 08:36:40,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 08:36:40,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 08:36:40,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2118 transitions. [2023-08-27 08:36:40,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3074912891986063 [2023-08-27 08:36:40,921 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2118 transitions. [2023-08-27 08:36:40,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2118 transitions. [2023-08-27 08:36:40,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:36:40,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2118 transitions. [2023-08-27 08:36:40,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 88.25) internal successors, (2118), 24 states have internal predecessors, (2118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:40,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 287.0) internal successors, (7175), 25 states have internal predecessors, (7175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:40,927 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 287.0) internal successors, (7175), 25 states have internal predecessors, (7175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:40,927 INFO L175 Difference]: Start difference. First operand has 485 places, 1048 transitions, 22444 flow. Second operand 24 states and 2118 transitions. [2023-08-27 08:36:40,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 1209 transitions, 26755 flow [2023-08-27 08:36:45,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 1209 transitions, 25647 flow, removed 436 selfloop flow, removed 19 redundant places. [2023-08-27 08:36:45,476 INFO L231 Difference]: Finished difference. Result has 478 places, 1080 transitions, 23285 flow [2023-08-27 08:36:45,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=21430, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=799, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=23285, PETRI_PLACES=478, PETRI_TRANSITIONS=1080} [2023-08-27 08:36:45,477 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 448 predicate places. [2023-08-27 08:36:45,477 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 1080 transitions, 23285 flow [2023-08-27 08:36:45,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 83.65217391304348) internal successors, (1924), 23 states have internal predecessors, (1924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:45,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:36:45,478 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:36:45,482 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 08:36:45,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:36:45,682 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:36:45,683 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:36:45,683 INFO L85 PathProgramCache]: Analyzing trace with hash 2113274351, now seen corresponding path program 10 times [2023-08-27 08:36:45,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:36:45,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287250311] [2023-08-27 08:36:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:36:45,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:36:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:36:47,198 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:36:47,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:36:47,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287250311] [2023-08-27 08:36:47,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287250311] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:36:47,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029414363] [2023-08-27 08:36:47,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:36:47,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:36:47,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:36:47,199 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 08:36:47,201 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 08:36:47,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:36:47,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:36:47,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 08:36:47,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:36:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:36:47,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:36:48,176 INFO L322 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-27 08:36:48,176 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 224 treesize of output 186 [2023-08-27 08:36:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-27 08:36:48,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029414363] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:36:48,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:36:48,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 5] total 28 [2023-08-27 08:36:48,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360238918] [2023-08-27 08:36:48,960 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:36:48,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 08:36:48,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:36:48,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 08:36:48,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2023-08-27 08:36:48,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 287 [2023-08-27 08:36:48,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 1080 transitions, 23285 flow. Second operand has 30 states, 30 states have (on average 83.43333333333334) internal successors, (2503), 30 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:48,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:36:48,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 287 [2023-08-27 08:36:48,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:36:57,911 INFO L124 PetriNetUnfolderBase]: 9092/17091 cut-off events. [2023-08-27 08:36:57,911 INFO L125 PetriNetUnfolderBase]: For 558243/558243 co-relation queries the response was YES. [2023-08-27 08:36:58,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106681 conditions, 17091 events. 9092/17091 cut-off events. For 558243/558243 co-relation queries the response was YES. Maximal size of possible extension queue 1041. Compared 148944 event pairs, 2639 based on Foata normal form. 36/17126 useless extension candidates. Maximal degree in co-relation 106532. Up to 12907 conditions per place. [2023-08-27 08:36:58,132 INFO L140 encePairwiseOnDemand]: 279/287 looper letters, 920 selfloop transitions, 184 changer transitions 34/1138 dead transitions. [2023-08-27 08:36:58,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 1138 transitions, 25534 flow [2023-08-27 08:36:58,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 08:36:58,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 08:36:58,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1581 transitions. [2023-08-27 08:36:58,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3060394889663182 [2023-08-27 08:36:58,134 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1581 transitions. [2023-08-27 08:36:58,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1581 transitions. [2023-08-27 08:36:58,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:36:58,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1581 transitions. [2023-08-27 08:36:58,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 87.83333333333333) internal successors, (1581), 18 states have internal predecessors, (1581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:58,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 287.0) internal successors, (5453), 19 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:58,139 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 287.0) internal successors, (5453), 19 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:36:58,140 INFO L175 Difference]: Start difference. First operand has 478 places, 1080 transitions, 23285 flow. Second operand 18 states and 1581 transitions. [2023-08-27 08:36:58,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 1138 transitions, 25534 flow [2023-08-27 08:37:02,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 1138 transitions, 24995 flow, removed 250 selfloop flow, removed 9 redundant places. [2023-08-27 08:37:02,448 INFO L231 Difference]: Finished difference. Result has 485 places, 1068 transitions, 22892 flow [2023-08-27 08:37:02,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=22387, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1067, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=883, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=22892, PETRI_PLACES=485, PETRI_TRANSITIONS=1068} [2023-08-27 08:37:02,449 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 455 predicate places. [2023-08-27 08:37:02,449 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 1068 transitions, 22892 flow [2023-08-27 08:37:02,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 83.43333333333334) internal successors, (2503), 30 states have internal predecessors, (2503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:37:02,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:37:02,450 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:37:02,454 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 08:37:02,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:37:02,650 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:37:02,650 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:37:02,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1700401327, now seen corresponding path program 11 times [2023-08-27 08:37:02,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:37:02,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911284847] [2023-08-27 08:37:02,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:37:02,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:37:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:37:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:37:04,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:37:04,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911284847] [2023-08-27 08:37:04,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911284847] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:37:04,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960794980] [2023-08-27 08:37:04,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:37:04,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:37:04,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:37:04,801 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 08:37:04,805 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 08:37:04,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:37:04,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:37:04,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-27 08:37:04,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:37:05,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:37:05,585 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:37:06,428 INFO L322 Elim1Store]: treesize reduction 18, result has 82.5 percent of original size [2023-08-27 08:37:06,429 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 250 treesize of output 242 [2023-08-27 08:37:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:37:08,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960794980] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:37:08,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:37:08,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 30 [2023-08-27 08:37:08,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432987150] [2023-08-27 08:37:08,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:37:08,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 08:37:08,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:37:08,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 08:37:08,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2023-08-27 08:37:08,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 287 [2023-08-27 08:37:08,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 1068 transitions, 22892 flow. Second operand has 32 states, 32 states have (on average 76.40625) internal successors, (2445), 32 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:37:08,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:37:08,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 287 [2023-08-27 08:37:08,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:37:19,636 INFO L124 PetriNetUnfolderBase]: 9890/18531 cut-off events. [2023-08-27 08:37:19,637 INFO L125 PetriNetUnfolderBase]: For 835249/835249 co-relation queries the response was YES. [2023-08-27 08:37:19,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122151 conditions, 18531 events. 9890/18531 cut-off events. For 835249/835249 co-relation queries the response was YES. Maximal size of possible extension queue 1165. Compared 163213 event pairs, 2264 based on Foata normal form. 116/18647 useless extension candidates. Maximal degree in co-relation 122001. Up to 9825 conditions per place. [2023-08-27 08:37:19,928 INFO L140 encePairwiseOnDemand]: 279/287 looper letters, 997 selfloop transitions, 381 changer transitions 38/1416 dead transitions. [2023-08-27 08:37:19,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 1416 transitions, 31865 flow [2023-08-27 08:37:19,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 08:37:19,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 08:37:19,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3081 transitions. [2023-08-27 08:37:19,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29014031453055844 [2023-08-27 08:37:19,931 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3081 transitions. [2023-08-27 08:37:19,931 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3081 transitions. [2023-08-27 08:37:19,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:37:19,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3081 transitions. [2023-08-27 08:37:19,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 83.27027027027027) internal successors, (3081), 37 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:37:19,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 287.0) internal successors, (10906), 38 states have internal predecessors, (10906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:37:19,938 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 287.0) internal successors, (10906), 38 states have internal predecessors, (10906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:37:19,938 INFO L175 Difference]: Start difference. First operand has 485 places, 1068 transitions, 22892 flow. Second operand 37 states and 3081 transitions. [2023-08-27 08:37:19,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 1416 transitions, 31865 flow [2023-08-27 08:37:25,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 1416 transitions, 31552 flow, removed 91 selfloop flow, removed 15 redundant places. [2023-08-27 08:37:25,493 INFO L231 Difference]: Finished difference. Result has 526 places, 1140 transitions, 26654 flow [2023-08-27 08:37:25,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=22366, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1059, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=310, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=26654, PETRI_PLACES=526, PETRI_TRANSITIONS=1140} [2023-08-27 08:37:25,494 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 496 predicate places. [2023-08-27 08:37:25,494 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 1140 transitions, 26654 flow [2023-08-27 08:37:25,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 76.40625) internal successors, (2445), 32 states have internal predecessors, (2445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:37:25,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:37:25,495 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:37:25,501 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 08:37:25,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:37:25,695 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:37:25,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:37:25,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1938533729, now seen corresponding path program 12 times [2023-08-27 08:37:25,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:37:25,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081695504] [2023-08-27 08:37:25,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:37:25,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:37:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:37:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:37:25,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:37:25,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081695504] [2023-08-27 08:37:25,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081695504] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:37:25,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54503122] [2023-08-27 08:37:25,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:37:25,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:37:25,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:37:25,909 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 08:37:25,944 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 08:37:26,100 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 08:37:26,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:37:26,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 08:37:26,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:37:26,615 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:37:26,615 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 140 [2023-08-27 08:37:26,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:37:26,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:37:27,172 INFO L322 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-27 08:37:27,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 237 treesize of output 171 [2023-08-27 08:37:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:37:27,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54503122] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:37:27,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:37:27,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 27 [2023-08-27 08:37:27,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126719615] [2023-08-27 08:37:27,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:37:27,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:37:27,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:37:27,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:37:27,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2023-08-27 08:37:27,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 287 [2023-08-27 08:37:27,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 1140 transitions, 26654 flow. Second operand has 28 states, 28 states have (on average 87.60714285714286) internal successors, (2453), 28 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:37:27,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:37:27,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 287 [2023-08-27 08:37:27,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:37:31,370 INFO L124 PetriNetUnfolderBase]: 3624/6855 cut-off events. [2023-08-27 08:37:31,370 INFO L125 PetriNetUnfolderBase]: For 460653/460653 co-relation queries the response was YES. [2023-08-27 08:37:31,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52942 conditions, 6855 events. 3624/6855 cut-off events. For 460653/460653 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 51487 event pairs, 1344 based on Foata normal form. 48/6903 useless extension candidates. Maximal degree in co-relation 52774. Up to 5893 conditions per place. [2023-08-27 08:37:31,464 INFO L140 encePairwiseOnDemand]: 281/287 looper letters, 415 selfloop transitions, 41 changer transitions 41/497 dead transitions. [2023-08-27 08:37:31,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 497 transitions, 11980 flow [2023-08-27 08:37:31,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 08:37:31,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 08:37:31,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1945 transitions. [2023-08-27 08:37:31,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3227144516343123 [2023-08-27 08:37:31,466 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1945 transitions. [2023-08-27 08:37:31,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1945 transitions. [2023-08-27 08:37:31,467 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:37:31,467 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1945 transitions. [2023-08-27 08:37:31,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 92.61904761904762) internal successors, (1945), 21 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:37:31,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 287.0) internal successors, (6314), 22 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:37:31,471 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 287.0) internal successors, (6314), 22 states have internal predecessors, (6314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:37:31,471 INFO L175 Difference]: Start difference. First operand has 526 places, 1140 transitions, 26654 flow. Second operand 21 states and 1945 transitions. [2023-08-27 08:37:31,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 497 transitions, 11980 flow [2023-08-27 08:37:33,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 497 transitions, 10056 flow, removed 630 selfloop flow, removed 101 redundant places. [2023-08-27 08:37:33,648 INFO L231 Difference]: Finished difference. Result has 335 places, 404 transitions, 8885 flow [2023-08-27 08:37:33,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=8803, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=8885, PETRI_PLACES=335, PETRI_TRANSITIONS=404} [2023-08-27 08:37:33,649 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 305 predicate places. [2023-08-27 08:37:33,649 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 404 transitions, 8885 flow [2023-08-27 08:37:33,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 87.60714285714286) internal successors, (2453), 28 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:37:33,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:37:33,650 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:37:33,656 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 08:37:33,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:37:33,851 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:37:33,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:37:33,852 INFO L85 PathProgramCache]: Analyzing trace with hash 313495854, now seen corresponding path program 10 times [2023-08-27 08:37:33,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:37:33,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94242730] [2023-08-27 08:37:33,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:37:33,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:37:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:37:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:37:35,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:37:35,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94242730] [2023-08-27 08:37:35,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94242730] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:37:35,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874652786] [2023-08-27 08:37:35,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:37:35,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:37:35,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:37:35,866 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 08:37:35,867 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 08:37:36,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:37:36,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:37:36,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 08:37:36,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:37:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:37:37,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:37:38,772 INFO L322 Elim1Store]: treesize reduction 101, result has 44.2 percent of original size [2023-08-27 08:37:38,772 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 347 treesize of output 280 [2023-08-27 08:37:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:37:42,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874652786] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:37:42,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:37:42,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 43 [2023-08-27 08:37:42,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635432826] [2023-08-27 08:37:42,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:37:42,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-27 08:37:42,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:37:42,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-27 08:37:42,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=1646, Unknown=0, NotChecked=0, Total=1980 [2023-08-27 08:37:42,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 287 [2023-08-27 08:37:42,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 404 transitions, 8885 flow. Second operand has 45 states, 45 states have (on average 83.2) internal successors, (3744), 45 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:37:42,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:37:42,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 287 [2023-08-27 08:37:42,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:38:24,007 INFO L124 PetriNetUnfolderBase]: 10046/18825 cut-off events. [2023-08-27 08:38:24,007 INFO L125 PetriNetUnfolderBase]: For 1065970/1065970 co-relation queries the response was YES. [2023-08-27 08:38:24,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136547 conditions, 18825 events. 10046/18825 cut-off events. For 1065970/1065970 co-relation queries the response was YES. Maximal size of possible extension queue 1084. Compared 163383 event pairs, 1147 based on Foata normal form. 508/19333 useless extension candidates. Maximal degree in co-relation 136436. Up to 3886 conditions per place. [2023-08-27 08:38:24,274 INFO L140 encePairwiseOnDemand]: 278/287 looper letters, 1358 selfloop transitions, 890 changer transitions 16/2264 dead transitions. [2023-08-27 08:38:24,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 2264 transitions, 47310 flow [2023-08-27 08:38:24,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2023-08-27 08:38:24,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2023-08-27 08:38:24,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 12662 transitions. [2023-08-27 08:38:24,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31969903549967177 [2023-08-27 08:38:24,282 INFO L72 ComplementDD]: Start complementDD. Operand 138 states and 12662 transitions. [2023-08-27 08:38:24,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 138 states and 12662 transitions. [2023-08-27 08:38:24,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:38:24,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 138 states and 12662 transitions. [2023-08-27 08:38:24,292 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 139 states, 138 states have (on average 91.7536231884058) internal successors, (12662), 138 states have internal predecessors, (12662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:38:24,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 139 states, 139 states have (on average 287.0) internal successors, (39893), 139 states have internal predecessors, (39893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:38:24,315 INFO L81 ComplementDD]: Finished complementDD. Result has 139 states, 139 states have (on average 287.0) internal successors, (39893), 139 states have internal predecessors, (39893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:38:24,315 INFO L175 Difference]: Start difference. First operand has 335 places, 404 transitions, 8885 flow. Second operand 138 states and 12662 transitions. [2023-08-27 08:38:24,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 2264 transitions, 47310 flow [2023-08-27 08:38:28,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 2264 transitions, 46571 flow, removed 328 selfloop flow, removed 21 redundant places. [2023-08-27 08:38:28,336 INFO L231 Difference]: Finished difference. Result has 558 places, 1243 transitions, 34259 flow [2023-08-27 08:38:28,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=8768, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=138, PETRI_FLOW=34259, PETRI_PLACES=558, PETRI_TRANSITIONS=1243} [2023-08-27 08:38:28,337 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 528 predicate places. [2023-08-27 08:38:28,338 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 1243 transitions, 34259 flow [2023-08-27 08:38:28,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 83.2) internal successors, (3744), 45 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:38:28,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:38:28,338 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:38:28,343 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 08:38:28,541 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,SelfDestructingSolverStorable33 [2023-08-27 08:38:28,541 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:38:28,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:38:28,541 INFO L85 PathProgramCache]: Analyzing trace with hash 2027677038, now seen corresponding path program 11 times [2023-08-27 08:38:28,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:38:28,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212989798] [2023-08-27 08:38:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:38:28,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:38:28,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:38:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:38:30,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:38:30,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212989798] [2023-08-27 08:38:30,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212989798] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:38:30,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398365302] [2023-08-27 08:38:30,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:38:30,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:38:30,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:38:30,202 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 08:38:30,204 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 08:38:30,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:38:30,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:38:30,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-27 08:38:30,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:38:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:38:31,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:38:32,916 INFO L322 Elim1Store]: treesize reduction 73, result has 31.8 percent of original size [2023-08-27 08:38:32,917 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 303 treesize of output 225 [2023-08-27 08:38:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:38:34,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398365302] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:38:34,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:38:34,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 43 [2023-08-27 08:38:34,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751183392] [2023-08-27 08:38:34,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:38:34,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-27 08:38:34,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:38:34,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-27 08:38:34,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1695, Unknown=0, NotChecked=0, Total=1980 [2023-08-27 08:38:34,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 287 [2023-08-27 08:38:34,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 1243 transitions, 34259 flow. Second operand has 45 states, 45 states have (on average 83.2) internal successors, (3744), 45 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:38:34,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:38:34,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 287 [2023-08-27 08:38:34,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:39:31,598 INFO L124 PetriNetUnfolderBase]: 18210/33902 cut-off events. [2023-08-27 08:39:31,598 INFO L125 PetriNetUnfolderBase]: For 6039144/6039144 co-relation queries the response was YES. [2023-08-27 08:39:32,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 322041 conditions, 33902 events. 18210/33902 cut-off events. For 6039144/6039144 co-relation queries the response was YES. Maximal size of possible extension queue 1801. Compared 319228 event pairs, 3552 based on Foata normal form. 636/34538 useless extension candidates. Maximal degree in co-relation 321827. Up to 10681 conditions per place. [2023-08-27 08:39:32,926 INFO L140 encePairwiseOnDemand]: 277/287 looper letters, 2214 selfloop transitions, 1194 changer transitions 82/3490 dead transitions. [2023-08-27 08:39:32,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 719 places, 3490 transitions, 94311 flow [2023-08-27 08:39:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2023-08-27 08:39:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2023-08-27 08:39:32,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 14733 transitions. [2023-08-27 08:39:32,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31687959736740223 [2023-08-27 08:39:32,935 INFO L72 ComplementDD]: Start complementDD. Operand 162 states and 14733 transitions. [2023-08-27 08:39:32,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 162 states and 14733 transitions. [2023-08-27 08:39:32,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:39:32,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 162 states and 14733 transitions. [2023-08-27 08:39:32,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 163 states, 162 states have (on average 90.94444444444444) internal successors, (14733), 162 states have internal predecessors, (14733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:39:32,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 163 states, 163 states have (on average 287.0) internal successors, (46781), 163 states have internal predecessors, (46781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:39:32,970 INFO L81 ComplementDD]: Finished complementDD. Result has 163 states, 163 states have (on average 287.0) internal successors, (46781), 163 states have internal predecessors, (46781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:39:32,970 INFO L175 Difference]: Start difference. First operand has 558 places, 1243 transitions, 34259 flow. Second operand 162 states and 14733 transitions. [2023-08-27 08:39:32,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 719 places, 3490 transitions, 94311 flow [2023-08-27 08:40:20,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 709 places, 3490 transitions, 85328 flow, removed 4467 selfloop flow, removed 10 redundant places. [2023-08-27 08:40:20,166 INFO L231 Difference]: Finished difference. Result has 818 places, 2250 transitions, 68321 flow [2023-08-27 08:40:20,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=287, PETRI_DIFFERENCE_MINUEND_FLOW=28746, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=374, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=749, PETRI_DIFFERENCE_SUBTRAHEND_STATES=162, PETRI_FLOW=68321, PETRI_PLACES=818, PETRI_TRANSITIONS=2250} [2023-08-27 08:40:20,167 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 788 predicate places. [2023-08-27 08:40:20,167 INFO L495 AbstractCegarLoop]: Abstraction has has 818 places, 2250 transitions, 68321 flow [2023-08-27 08:40:20,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 83.2) internal successors, (3744), 45 states have internal predecessors, (3744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:40:20,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:40:20,168 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:40:20,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-27 08:40:20,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:40:20,368 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-08-27 08:40:20,369 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:40:20,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1202356180, now seen corresponding path program 13 times [2023-08-27 08:40:20,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:40:20,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489212001] [2023-08-27 08:40:20,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:40:20,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:40:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:40:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:40:20,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:40:20,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489212001] [2023-08-27 08:40:20,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489212001] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:40:20,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742863897] [2023-08-27 08:40:20,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:40:20,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:40:20,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:40:20,522 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:40:20,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-27 08:40:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:40:20,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:40:20,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:40:21,030 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:40:21,031 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 208 treesize of output 140 [2023-08-27 08:40:21,192 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:40:21,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:40:21,639 INFO L322 Elim1Store]: treesize reduction 18, result has 5.3 percent of original size [2023-08-27 08:40:21,639 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 237 treesize of output 171 [2023-08-27 08:40:21,789 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:40:21,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742863897] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:40:21,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:40:21,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 18 [2023-08-27 08:40:21,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179277586] [2023-08-27 08:40:21,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:40:21,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:40:21,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:40:21,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:40:21,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2023-08-27 08:40:21,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 287 [2023-08-27 08:40:21,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 818 places, 2250 transitions, 68321 flow. Second operand has 20 states, 20 states have (on average 101.8) internal successors, (2036), 20 states have internal predecessors, (2036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:40:21,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:40:21,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 287 [2023-08-27 08:40:21,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:41:07,884 INFO L124 PetriNetUnfolderBase]: 23124/43034 cut-off events. [2023-08-27 08:41:07,884 INFO L125 PetriNetUnfolderBase]: For 13155410/13155410 co-relation queries the response was YES. [2023-08-27 08:41:11,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 469106 conditions, 43034 events. 23124/43034 cut-off events. For 13155410/13155410 co-relation queries the response was YES. Maximal size of possible extension queue 2417. Compared 419035 event pairs, 4929 based on Foata normal form. 156/43190 useless extension candidates. Maximal degree in co-relation 468783. Up to 24644 conditions per place. [2023-08-27 08:41:11,871 INFO L140 encePairwiseOnDemand]: 281/287 looper letters, 1879 selfloop transitions, 1232 changer transitions 5/3116 dead transitions. [2023-08-27 08:41:11,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 829 places, 3116 transitions, 103407 flow [2023-08-27 08:41:11,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 08:41:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 08:41:11,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1324 transitions. [2023-08-27 08:41:11,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38443670150987225 [2023-08-27 08:41:11,874 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1324 transitions. [2023-08-27 08:41:11,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1324 transitions. [2023-08-27 08:41:11,875 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:41:11,875 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1324 transitions. [2023-08-27 08:41:11,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 110.33333333333333) internal successors, (1324), 12 states have internal predecessors, (1324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:41:11,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 287.0) internal successors, (3731), 13 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:41:11,878 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 287.0) internal successors, (3731), 13 states have internal predecessors, (3731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:41:11,878 INFO L175 Difference]: Start difference. First operand has 818 places, 2250 transitions, 68321 flow. Second operand 12 states and 1324 transitions. [2023-08-27 08:41:11,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 829 places, 3116 transitions, 103407 flow Received shutdown request... [2023-08-27 08:42:49,103 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 08:42:49,104 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 08:42:49,222 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 21 remaining) [2023-08-27 08:42:49,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-08-27 08:42:49,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:42:49,423 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-27 08:42:49,425 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 21 remaining) [2023-08-27 08:42:49,425 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 21 remaining) [2023-08-27 08:42:49,425 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 21 remaining) [2023-08-27 08:42:49,425 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 21 remaining) [2023-08-27 08:42:49,425 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 21 remaining) [2023-08-27 08:42:49,425 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 21 remaining) [2023-08-27 08:42:49,425 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 21 remaining) [2023-08-27 08:42:49,426 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 21 remaining) [2023-08-27 08:42:49,426 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 21 remaining) [2023-08-27 08:42:49,426 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 21 remaining) [2023-08-27 08:42:49,426 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (9 of 21 remaining) [2023-08-27 08:42:49,426 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 21 remaining) [2023-08-27 08:42:49,426 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 21 remaining) [2023-08-27 08:42:49,426 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 21 remaining) [2023-08-27 08:42:49,426 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 21 remaining) [2023-08-27 08:42:49,426 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 21 remaining) [2023-08-27 08:42:49,427 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 21 remaining) [2023-08-27 08:42:49,427 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 21 remaining) [2023-08-27 08:42:49,427 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 21 remaining) [2023-08-27 08:42:49,427 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 21 remaining) [2023-08-27 08:42:49,427 INFO L445 BasicCegarLoop]: Path program histogram: [13, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 08:42:49,431 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 08:42:49,432 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 08:42:49,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 08:42:49 BasicIcfg [2023-08-27 08:42:49,434 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 08:42:49,434 INFO L158 Benchmark]: Toolchain (without parser) took 790780.89ms. Allocated memory was 367.0MB in the beginning and 11.5GB in the end (delta: 11.2GB). Free memory was 344.3MB in the beginning and 7.3GB in the end (delta: -7.0GB). Peak memory consumption was 9.7GB. Max. memory is 16.0GB. [2023-08-27 08:42:49,434 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 367.0MB. Free memory is still 343.5MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 08:42:49,434 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.97ms. Allocated memory is still 367.0MB. Free memory was 344.3MB in the beginning and 332.7MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 08:42:49,435 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.95ms. Allocated memory is still 367.0MB. Free memory was 332.7MB in the beginning and 330.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 08:42:49,435 INFO L158 Benchmark]: Boogie Preprocessor took 23.81ms. Allocated memory is still 367.0MB. Free memory was 330.7MB in the beginning and 329.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 08:42:49,435 INFO L158 Benchmark]: RCFGBuilder took 610.30ms. Allocated memory is still 367.0MB. Free memory was 329.1MB in the beginning and 300.8MB in the end (delta: 28.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-27 08:42:49,435 INFO L158 Benchmark]: TraceAbstraction took 789900.78ms. Allocated memory was 367.0MB in the beginning and 11.5GB in the end (delta: 11.2GB). Free memory was 300.2MB in the beginning and 7.3GB in the end (delta: -7.0GB). Peak memory consumption was 9.7GB. Max. memory is 16.0GB. [2023-08-27 08:42:49,436 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 367.0MB. Free memory is still 343.5MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 207.97ms. Allocated memory is still 367.0MB. Free memory was 344.3MB in the beginning and 332.7MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 32.95ms. Allocated memory is still 367.0MB. Free memory was 332.7MB in the beginning and 330.7MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.81ms. Allocated memory is still 367.0MB. Free memory was 330.7MB in the beginning and 329.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 610.30ms. Allocated memory is still 367.0MB. Free memory was 329.1MB in the beginning and 300.8MB in the end (delta: 28.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * TraceAbstraction took 789900.78ms. Allocated memory was 367.0MB in the beginning and 11.5GB in the end (delta: 11.2GB). Free memory was 300.2MB in the beginning and 7.3GB in the end (delta: -7.0GB). Peak memory consumption was 9.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.9s, 126 PlacesBefore, 30 PlacesAfterwards, 130 TransitionsBefore, 26 TransitionsAfterwards, 1184 CoEnabledTransitionPairs, 7 FixpointIterations, 76 TrivialSequentialCompositions, 41 ConcurrentSequentialCompositions, 11 TrivialYvCompositions, 10 ConcurrentYvCompositions, 8 ChoiceCompositions, 146 TotalNumberOfCompositions, 1476 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1429, independent: 1420, independent conditional: 0, independent unconditional: 1420, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 654, independent: 650, independent conditional: 0, independent unconditional: 650, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1429, independent: 770, independent conditional: 0, independent unconditional: 770, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 654, unknown conditional: 0, unknown unconditional: 654] , Statistics on independence cache: Total cache size (in pairs): 41, Positive cache size: 40, Positive conditional cache size: 0, Positive unconditional cache size: 40, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 70]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 104]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 89]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 167 locations, 21 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 789.8s, OverallIterations: 36, TraceHistogramMax: 6, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.0s, AutomataDifference: 605.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.0s, HoareTripleCheckerStatistics: 127 mSolverCounterUnknown, 9460 SdHoareTripleChecker+Valid, 93.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9460 mSDsluCounter, 297 SdHoareTripleChecker+Invalid, 89.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 270 mSDsCounter, 1170 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 43199 IncrementalHoareTripleChecker+Invalid, 44496 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1170 mSolverCounterUnsat, 27 mSDtfsCounter, 43199 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1868 GetRequests, 293 SyntacticMatches, 3 SemanticMatches, 1572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37688 ImplicationChecksByTransitivity, 197.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68321occurred in iteration=35, InterpolantAutomatonStates: 1118, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 167.6s InterpolantComputationTime, 861 NumberOfCodeBlocks, 845 NumberOfCodeBlocksAsserted, 94 NumberOfCheckSat, 1141 ConstructedInterpolants, 68 QuantifiedInterpolants, 36603 SizeOfPredicates, 496 NumberOfNonLiveVariables, 5566 ConjunctsInSsa, 824 ConjunctsInUnsatCore, 95 InterpolantComputations, 9 PerfectInterpolantSequences, 255/945 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown