/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 15:01:28,754 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 15:01:28,839 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 15:01:28,843 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 15:01:28,844 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 15:01:28,875 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 15:01:28,876 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 15:01:28,877 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 15:01:28,877 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 15:01:28,881 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 15:01:28,881 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 15:01:28,882 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 15:01:28,882 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 15:01:28,883 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 15:01:28,883 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 15:01:28,883 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 15:01:28,883 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 15:01:28,884 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 15:01:28,884 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 15:01:28,884 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 15:01:28,884 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 15:01:28,885 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 15:01:28,885 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 15:01:28,886 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 15:01:28,886 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 15:01:28,886 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 15:01:28,887 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 15:01:28,887 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 15:01:28,887 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 15:01:28,887 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 15:01:28,888 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 15:01:28,888 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 15:01:28,889 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 15:01:28,889 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 15:01:28,889 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 15:01:28,889 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 15:01:29,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 15:01:29,221 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 15:01:29,223 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 15:01:29,224 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 15:01:29,224 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 15:01:29,226 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-08-27 15:01:30,493 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 15:01:30,710 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 15:01:30,710 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-queue-add-2.wvr.c [2023-08-27 15:01:30,717 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6fc86c6/3ac5d06de40049559bd25febf9bca7cb/FLAG7564db8b2 [2023-08-27 15:01:30,737 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cf6fc86c6/3ac5d06de40049559bd25febf9bca7cb [2023-08-27 15:01:30,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 15:01:30,743 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 15:01:30,746 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 15:01:30,746 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 15:01:30,749 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 15:01:30,750 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:01:30" (1/1) ... [2023-08-27 15:01:30,751 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42739e40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:01:30, skipping insertion in model container [2023-08-27 15:01:30,751 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 03:01:30" (1/1) ... [2023-08-27 15:01:30,776 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 15:01:30,943 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 15:01:30,952 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 15:01:30,972 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 15:01:30,980 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 15:01:30,980 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 15:01:30,986 INFO L206 MainTranslator]: Completed translation [2023-08-27 15:01:30,987 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:01:30 WrapperNode [2023-08-27 15:01:30,987 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 15:01:30,988 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 15:01:30,988 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 15:01:30,988 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 15:01:30,994 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:01:30" (1/1) ... [2023-08-27 15:01:31,011 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:01:30" (1/1) ... [2023-08-27 15:01:31,043 INFO L138 Inliner]: procedures = 24, calls = 40, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 174 [2023-08-27 15:01:31,044 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 15:01:31,045 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 15:01:31,045 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 15:01:31,045 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 15:01:31,053 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:01:30" (1/1) ... [2023-08-27 15:01:31,053 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:01:30" (1/1) ... [2023-08-27 15:01:31,067 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:01:30" (1/1) ... [2023-08-27 15:01:31,068 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:01:30" (1/1) ... [2023-08-27 15:01:31,073 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:01:30" (1/1) ... [2023-08-27 15:01:31,076 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:01:30" (1/1) ... [2023-08-27 15:01:31,092 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:01:30" (1/1) ... [2023-08-27 15:01:31,094 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:01:30" (1/1) ... [2023-08-27 15:01:31,096 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 15:01:31,097 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 15:01:31,097 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 15:01:31,097 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 15:01:31,098 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:01:30" (1/1) ... [2023-08-27 15:01:31,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 15:01:31,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:01:31,130 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-27 15:01:31,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-27 15:01:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 15:01:31,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 15:01:31,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 15:01:31,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 15:01:31,172 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 15:01:31,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 15:01:31,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 15:01:31,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 15:01:31,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 15:01:31,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 15:01:31,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 15:01:31,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 15:01:31,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 15:01:31,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 15:01:31,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 15:01:31,174 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 15:01:31,298 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 15:01:31,302 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 15:01:31,619 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 15:01:31,743 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 15:01:31,743 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 15:01:31,745 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:01:31 BoogieIcfgContainer [2023-08-27 15:01:31,745 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 15:01:31,747 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 15:01:31,747 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 15:01:31,750 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 15:01:31,750 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 03:01:30" (1/3) ... [2023-08-27 15:01:31,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@335e933b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 03:01:31, skipping insertion in model container [2023-08-27 15:01:31,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 03:01:30" (2/3) ... [2023-08-27 15:01:31,751 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@335e933b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 03:01:31, skipping insertion in model container [2023-08-27 15:01:31,751 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 03:01:31" (3/3) ... [2023-08-27 15:01:31,756 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-queue-add-2.wvr.c [2023-08-27 15:01:31,770 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 15:01:31,770 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-27 15:01:31,770 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 15:01:31,853 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 15:01:31,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 145 places, 149 transitions, 314 flow [2023-08-27 15:01:31,939 INFO L124 PetriNetUnfolderBase]: 11/147 cut-off events. [2023-08-27 15:01:31,939 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 15:01:31,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 147 events. 11/147 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 146 event pairs, 0 based on Foata normal form. 0/123 useless extension candidates. Maximal degree in co-relation 107. Up to 3 conditions per place. [2023-08-27 15:01:31,944 INFO L82 GeneralOperation]: Start removeDead. Operand has 145 places, 149 transitions, 314 flow [2023-08-27 15:01:31,948 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 138 transitions, 288 flow [2023-08-27 15:01:31,951 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 15:01:31,960 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 138 transitions, 288 flow [2023-08-27 15:01:31,962 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 138 transitions, 288 flow [2023-08-27 15:01:31,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 138 transitions, 288 flow [2023-08-27 15:01:31,996 INFO L124 PetriNetUnfolderBase]: 11/138 cut-off events. [2023-08-27 15:01:31,996 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 15:01:31,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 147 conditions, 138 events. 11/138 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 145 event pairs, 0 based on Foata normal form. 0/115 useless extension candidates. Maximal degree in co-relation 107. Up to 3 conditions per place. [2023-08-27 15:01:31,998 INFO L119 LiptonReduction]: Number of co-enabled transitions 1192 [2023-08-27 15:01:37,402 INFO L134 LiptonReduction]: Checked pairs total: 1644 [2023-08-27 15:01:37,403 INFO L136 LiptonReduction]: Total number of compositions: 148 [2023-08-27 15:01:37,416 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 15:01:37,421 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;@34c2ac2, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 15:01:37,421 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-08-27 15:01:37,423 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 15:01:37,423 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 15:01:37,424 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 15:01:37,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:37,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 15:01:37,425 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:37,429 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:37,429 INFO L85 PathProgramCache]: Analyzing trace with hash 22181, now seen corresponding path program 1 times [2023-08-27 15:01:37,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:37,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985422623] [2023-08-27 15:01:37,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:37,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:37,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:37,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985422623] [2023-08-27 15:01:37,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985422623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:01:37,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:01:37,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 15:01:37,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288523316] [2023-08-27 15:01:37,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:01:37,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:01:37,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:37,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:01:37,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:01:37,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 297 [2023-08-27 15:01:37,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 70 flow. Second operand has 3 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 15:01:37,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:37,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 297 [2023-08-27 15:01:37,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:37,860 INFO L124 PetriNetUnfolderBase]: 247/364 cut-off events. [2023-08-27 15:01:37,861 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2023-08-27 15:01:37,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 748 conditions, 364 events. 247/364 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 1382 event pairs, 110 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 651. Up to 357 conditions per place. [2023-08-27 15:01:37,867 INFO L140 encePairwiseOnDemand]: 289/297 looper letters, 23 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2023-08-27 15:01:37,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 28 transitions, 120 flow [2023-08-27 15:01:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:01:37,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:01:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 388 transitions. [2023-08-27 15:01:37,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43546576879910215 [2023-08-27 15:01:37,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 388 transitions. [2023-08-27 15:01:37,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 388 transitions. [2023-08-27 15:01:37,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:37,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 388 transitions. [2023-08-27 15:01:37,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:37,903 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:37,904 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:37,906 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 70 flow. Second operand 3 states and 388 transitions. [2023-08-27 15:01:37,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 28 transitions, 120 flow [2023-08-27 15:01:37,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 28 transitions, 112 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 15:01:37,912 INFO L231 Difference]: Finished difference. Result has 29 places, 28 transitions, 77 flow [2023-08-27 15:01:37,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=29, PETRI_TRANSITIONS=28} [2023-08-27 15:01:37,917 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -4 predicate places. [2023-08-27 15:01:37,918 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 28 transitions, 77 flow [2023-08-27 15:01:37,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 15:01:37,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:37,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 15:01:37,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 15:01:37,919 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:37,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:37,928 INFO L85 PathProgramCache]: Analyzing trace with hash 688991, now seen corresponding path program 1 times [2023-08-27 15:01:37,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:37,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411203509] [2023-08-27 15:01:37,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:37,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:37,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:37,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411203509] [2023-08-27 15:01:37,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411203509] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:01:37,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:01:37,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:01:37,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761614710] [2023-08-27 15:01:37,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:01:38,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:01:38,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:38,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:01:38,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:01:38,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 297 [2023-08-27 15:01:38,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 28 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:38,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:38,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 297 [2023-08-27 15:01:38,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:38,111 INFO L124 PetriNetUnfolderBase]: 247/363 cut-off events. [2023-08-27 15:01:38,111 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 15:01:38,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 739 conditions, 363 events. 247/363 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 1376 event pairs, 110 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 715. Up to 353 conditions per place. [2023-08-27 15:01:38,114 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 22 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-08-27 15:01:38,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 27 transitions, 123 flow [2023-08-27 15:01:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:01:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:01:38,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-27 15:01:38,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276094276094276 [2023-08-27 15:01:38,117 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-27 15:01:38,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-27 15:01:38,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:38,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-27 15:01:38,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:38,122 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:38,122 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:38,122 INFO L175 Difference]: Start difference. First operand has 29 places, 28 transitions, 77 flow. Second operand 3 states and 381 transitions. [2023-08-27 15:01:38,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 27 transitions, 123 flow [2023-08-27 15:01:38,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 27 transitions, 118 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 15:01:38,124 INFO L231 Difference]: Finished difference. Result has 29 places, 27 transitions, 74 flow [2023-08-27 15:01:38,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=74, PETRI_PLACES=29, PETRI_TRANSITIONS=27} [2023-08-27 15:01:38,125 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -4 predicate places. [2023-08-27 15:01:38,125 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 27 transitions, 74 flow [2023-08-27 15:01:38,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.0) internal successors, (360), 3 states have internal predecessors, (360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:38,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:38,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 15:01:38,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 15:01:38,130 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:38,132 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:38,136 INFO L85 PathProgramCache]: Analyzing trace with hash 688992, now seen corresponding path program 1 times [2023-08-27 15:01:38,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:38,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267736660] [2023-08-27 15:01:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:38,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:38,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:38,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:38,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267736660] [2023-08-27 15:01:38,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267736660] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:01:38,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607376941] [2023-08-27 15:01:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:38,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:38,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:01:38,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:01:38,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 15:01:38,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:38,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 15:01:38,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:01:38,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:38,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:01:38,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:38,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607376941] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:01:38,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:01:38,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 15:01:38,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274615795] [2023-08-27 15:01:38,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:01:38,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 15:01:38,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:38,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 15:01:38,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 15:01:38,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 119 out of 297 [2023-08-27 15:01:38,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 27 transitions, 74 flow. Second operand has 7 states, 7 states have (on average 120.14285714285714) internal successors, (841), 7 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:38,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:38,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 119 of 297 [2023-08-27 15:01:38,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:38,516 INFO L124 PetriNetUnfolderBase]: 250/369 cut-off events. [2023-08-27 15:01:38,516 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 15:01:38,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 369 events. 250/369 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 1415 event pairs, 110 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 715. Up to 359 conditions per place. [2023-08-27 15:01:38,519 INFO L140 encePairwiseOnDemand]: 293/297 looper letters, 22 selfloop transitions, 9 changer transitions 0/33 dead transitions. [2023-08-27 15:01:38,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 33 transitions, 166 flow [2023-08-27 15:01:38,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 15:01:38,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 15:01:38,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 748 transitions. [2023-08-27 15:01:38,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2023-08-27 15:01:38,521 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 748 transitions. [2023-08-27 15:01:38,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 748 transitions. [2023-08-27 15:01:38,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:38,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 748 transitions. [2023-08-27 15:01:38,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 124.66666666666667) internal successors, (748), 6 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:38,527 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:38,528 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:38,528 INFO L175 Difference]: Start difference. First operand has 29 places, 27 transitions, 74 flow. Second operand 6 states and 748 transitions. [2023-08-27 15:01:38,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 33 transitions, 166 flow [2023-08-27 15:01:38,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 154 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 15:01:38,529 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 129 flow [2023-08-27 15:01:38,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=129, PETRI_PLACES=35, PETRI_TRANSITIONS=33} [2023-08-27 15:01:38,530 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-08-27 15:01:38,530 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 129 flow [2023-08-27 15:01:38,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 120.14285714285714) internal successors, (841), 7 states have internal predecessors, (841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:38,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:38,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 15:01:38,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 15:01:38,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:38,737 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:38,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:38,738 INFO L85 PathProgramCache]: Analyzing trace with hash 662076111, now seen corresponding path program 1 times [2023-08-27 15:01:38,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:38,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434285211] [2023-08-27 15:01:38,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:38,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:38,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:38,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434285211] [2023-08-27 15:01:38,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434285211] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:01:38,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:01:38,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:01:38,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458992734] [2023-08-27 15:01:38,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:01:38,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 15:01:38,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:38,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 15:01:38,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 15:01:38,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 297 [2023-08-27 15:01:38,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:38,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:38,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 297 [2023-08-27 15:01:38,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:38,984 INFO L124 PetriNetUnfolderBase]: 238/364 cut-off events. [2023-08-27 15:01:38,985 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 15:01:38,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 766 conditions, 364 events. 238/364 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 1331 event pairs, 109 based on Foata normal form. 4/141 useless extension candidates. Maximal degree in co-relation 730. Up to 349 conditions per place. [2023-08-27 15:01:38,987 INFO L140 encePairwiseOnDemand]: 283/297 looper letters, 28 selfloop transitions, 2 changer transitions 5/37 dead transitions. [2023-08-27 15:01:38,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 209 flow [2023-08-27 15:01:38,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 15:01:38,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 15:01:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 488 transitions. [2023-08-27 15:01:38,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107744107744108 [2023-08-27 15:01:38,989 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 488 transitions. [2023-08-27 15:01:38,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 488 transitions. [2023-08-27 15:01:38,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:38,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 488 transitions. [2023-08-27 15:01:38,991 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.0) internal successors, (488), 4 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:38,992 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:38,993 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:38,993 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 129 flow. Second operand 4 states and 488 transitions. [2023-08-27 15:01:38,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 209 flow [2023-08-27 15:01:38,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 37 transitions, 188 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 15:01:38,995 INFO L231 Difference]: Finished difference. Result has 38 places, 32 transitions, 129 flow [2023-08-27 15:01:38,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=38, PETRI_TRANSITIONS=32} [2023-08-27 15:01:38,996 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-08-27 15:01:38,996 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 32 transitions, 129 flow [2023-08-27 15:01:38,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 113.0) internal successors, (452), 4 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:38,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:38,997 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 15:01:38,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 15:01:38,997 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:38,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:38,997 INFO L85 PathProgramCache]: Analyzing trace with hash -947735258, now seen corresponding path program 2 times [2023-08-27 15:01:38,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:38,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965215793] [2023-08-27 15:01:38,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:38,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:39,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:39,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965215793] [2023-08-27 15:01:39,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965215793] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:01:39,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21693069] [2023-08-27 15:01:39,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:01:39,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:39,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:01:39,071 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:01:39,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 15:01:39,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 15:01:39,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:01:39,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 15:01:39,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:01:39,192 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:01:39,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:01:39,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21693069] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:01:39,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 15:01:39,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 15:01:39,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955189292] [2023-08-27 15:01:39,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:01:39,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:01:39,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:39,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:01:39,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 15:01:39,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 297 [2023-08-27 15:01:39,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 32 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:39,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:39,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 297 [2023-08-27 15:01:39,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:39,266 INFO L124 PetriNetUnfolderBase]: 249/367 cut-off events. [2023-08-27 15:01:39,266 INFO L125 PetriNetUnfolderBase]: For 38/38 co-relation queries the response was YES. [2023-08-27 15:01:39,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 367 events. 249/367 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 1396 event pairs, 110 based on Foata normal form. 1/126 useless extension candidates. Maximal degree in co-relation 1030. Up to 360 conditions per place. [2023-08-27 15:01:39,269 INFO L140 encePairwiseOnDemand]: 295/297 looper letters, 28 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-27 15:01:39,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 177 flow [2023-08-27 15:01:39,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:01:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:01:39,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 383 transitions. [2023-08-27 15:01:39,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298540965207632 [2023-08-27 15:01:39,271 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 383 transitions. [2023-08-27 15:01:39,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 383 transitions. [2023-08-27 15:01:39,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:39,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 383 transitions. [2023-08-27 15:01:39,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.66666666666667) internal successors, (383), 3 states have internal predecessors, (383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:39,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:39,274 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:39,274 INFO L175 Difference]: Start difference. First operand has 38 places, 32 transitions, 129 flow. Second operand 3 states and 383 transitions. [2023-08-27 15:01:39,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 177 flow [2023-08-27 15:01:39,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 31 transitions, 158 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-27 15:01:39,276 INFO L231 Difference]: Finished difference. Result has 32 places, 31 transitions, 102 flow [2023-08-27 15:01:39,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=32, PETRI_TRANSITIONS=31} [2023-08-27 15:01:39,276 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-27 15:01:39,277 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 31 transitions, 102 flow [2023-08-27 15:01:39,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:39,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:39,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 15:01:39,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 15:01:39,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:39,483 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:39,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:39,484 INFO L85 PathProgramCache]: Analyzing trace with hash -947823656, now seen corresponding path program 1 times [2023-08-27 15:01:39,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:39,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963432903] [2023-08-27 15:01:39,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:39,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:39,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:01:39,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:39,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963432903] [2023-08-27 15:01:39,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963432903] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:01:39,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:01:39,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:01:39,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217977653] [2023-08-27 15:01:39,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:01:39,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:01:39,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:39,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:01:39,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:01:39,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 297 [2023-08-27 15:01:39,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 31 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:39,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:39,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 297 [2023-08-27 15:01:39,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:39,604 INFO L124 PetriNetUnfolderBase]: 278/424 cut-off events. [2023-08-27 15:01:39,604 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-27 15:01:39,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1180 conditions, 424 events. 278/424 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 1718 event pairs, 114 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 1171. Up to 338 conditions per place. [2023-08-27 15:01:39,612 INFO L140 encePairwiseOnDemand]: 291/297 looper letters, 38 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2023-08-27 15:01:39,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 43 transitions, 229 flow [2023-08-27 15:01:39,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:01:39,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:01:39,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 400 transitions. [2023-08-27 15:01:39,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489337822671156 [2023-08-27 15:01:39,614 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 400 transitions. [2023-08-27 15:01:39,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 400 transitions. [2023-08-27 15:01:39,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:39,614 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 400 transitions. [2023-08-27 15:01:39,615 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 133.33333333333334) internal successors, (400), 3 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:39,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:39,616 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:39,617 INFO L175 Difference]: Start difference. First operand has 32 places, 31 transitions, 102 flow. Second operand 3 states and 400 transitions. [2023-08-27 15:01:39,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 43 transitions, 229 flow [2023-08-27 15:01:39,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 43 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:01:39,618 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 135 flow [2023-08-27 15:01:39,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-08-27 15:01:39,619 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 1 predicate places. [2023-08-27 15:01:39,619 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 135 flow [2023-08-27 15:01:39,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:39,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:39,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 15:01:39,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 15:01:39,620 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:39,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:39,620 INFO L85 PathProgramCache]: Analyzing trace with hash -947823659, now seen corresponding path program 1 times [2023-08-27 15:01:39,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:39,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935362278] [2023-08-27 15:01:39,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:39,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:39,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:39,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:39,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:39,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935362278] [2023-08-27 15:01:39,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935362278] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:01:39,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498494739] [2023-08-27 15:01:39,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:39,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:39,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:01:39,714 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:01:39,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 15:01:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:39,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 15:01:39,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:01:39,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:01:39,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:01:39,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498494739] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:01:39,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 15:01:39,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 15:01:39,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767396287] [2023-08-27 15:01:39,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:01:39,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:01:39,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:39,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:01:39,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 15:01:39,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 297 [2023-08-27 15:01:39,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 135 flow. Second operand has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:39,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:39,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 297 [2023-08-27 15:01:39,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:39,848 INFO L124 PetriNetUnfolderBase]: 130/209 cut-off events. [2023-08-27 15:01:39,848 INFO L125 PetriNetUnfolderBase]: For 78/87 co-relation queries the response was YES. [2023-08-27 15:01:39,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 672 conditions, 209 events. 130/209 cut-off events. For 78/87 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 716 event pairs, 65 based on Foata normal form. 30/127 useless extension candidates. Maximal degree in co-relation 662. Up to 205 conditions per place. [2023-08-27 15:01:39,850 INFO L140 encePairwiseOnDemand]: 293/297 looper letters, 27 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-27 15:01:39,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 30 transitions, 170 flow [2023-08-27 15:01:39,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:01:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:01:39,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2023-08-27 15:01:39,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44219977553310885 [2023-08-27 15:01:39,852 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2023-08-27 15:01:39,852 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2023-08-27 15:01:39,852 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:39,852 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2023-08-27 15:01:39,853 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:39,854 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:39,854 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:39,855 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 135 flow. Second operand 3 states and 394 transitions. [2023-08-27 15:01:39,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 30 transitions, 170 flow [2023-08-27 15:01:39,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 165 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 15:01:39,856 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 111 flow [2023-08-27 15:01:39,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=30, 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=111, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-08-27 15:01:39,857 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-27 15:01:39,857 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 111 flow [2023-08-27 15:01:39,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.66666666666667) internal successors, (377), 3 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:39,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:39,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:01:39,866 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 15:01:40,066 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 15:01:40,066 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:40,067 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:40,067 INFO L85 PathProgramCache]: Analyzing trace with hash 682239088, now seen corresponding path program 1 times [2023-08-27 15:01:40,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:40,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066334660] [2023-08-27 15:01:40,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:40,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:40,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:01:40,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:40,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066334660] [2023-08-27 15:01:40,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066334660] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:01:40,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:01:40,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:01:40,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220688452] [2023-08-27 15:01:40,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:01:40,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:01:40,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:40,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:01:40,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:01:40,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 297 [2023-08-27 15:01:40,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 111 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:40,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 297 [2023-08-27 15:01:40,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:40,160 INFO L124 PetriNetUnfolderBase]: 139/217 cut-off events. [2023-08-27 15:01:40,160 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2023-08-27 15:01:40,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 217 events. 139/217 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 654 event pairs, 25 based on Foata normal form. 0/124 useless extension candidates. Maximal degree in co-relation 648. Up to 149 conditions per place. [2023-08-27 15:01:40,162 INFO L140 encePairwiseOnDemand]: 294/297 looper letters, 32 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-08-27 15:01:40,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 36 transitions, 198 flow [2023-08-27 15:01:40,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:01:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:01:40,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2023-08-27 15:01:40,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4377104377104377 [2023-08-27 15:01:40,164 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2023-08-27 15:01:40,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2023-08-27 15:01:40,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:40,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2023-08-27 15:01:40,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,167 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,167 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 111 flow. Second operand 3 states and 390 transitions. [2023-08-27 15:01:40,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 36 transitions, 198 flow [2023-08-27 15:01:40,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 36 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:01:40,168 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 110 flow [2023-08-27 15:01:40,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=110, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-08-27 15:01:40,169 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-27 15:01:40,169 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 110 flow [2023-08-27 15:01:40,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:40,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:01:40,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 15:01:40,170 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:40,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:40,170 INFO L85 PathProgramCache]: Analyzing trace with hash 682239100, now seen corresponding path program 1 times [2023-08-27 15:01:40,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:40,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226721328] [2023-08-27 15:01:40,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:40,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:40,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:01:40,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:40,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226721328] [2023-08-27 15:01:40,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226721328] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:01:40,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821029889] [2023-08-27 15:01:40,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:40,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:40,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:01:40,216 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:01:40,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 15:01:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:40,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 15:01:40,295 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:01:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:01:40,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:01:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:01:40,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821029889] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:01:40,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:01:40,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 15:01:40,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514755628] [2023-08-27 15:01:40,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:01:40,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 15:01:40,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:40,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 15:01:40,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 15:01:40,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 297 [2023-08-27 15:01:40,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 110 flow. Second operand has 7 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:40,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 297 [2023-08-27 15:01:40,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:40,480 INFO L124 PetriNetUnfolderBase]: 237/351 cut-off events. [2023-08-27 15:01:40,481 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-08-27 15:01:40,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 351 events. 237/351 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1222 event pairs, 51 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 1170. Up to 262 conditions per place. [2023-08-27 15:01:40,483 INFO L140 encePairwiseOnDemand]: 293/297 looper letters, 53 selfloop transitions, 9 changer transitions 0/63 dead transitions. [2023-08-27 15:01:40,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 63 transitions, 368 flow [2023-08-27 15:01:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 15:01:40,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 15:01:40,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 784 transitions. [2023-08-27 15:01:40,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4399551066217733 [2023-08-27 15:01:40,486 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 784 transitions. [2023-08-27 15:01:40,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 784 transitions. [2023-08-27 15:01:40,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:40,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 784 transitions. [2023-08-27 15:01:40,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 130.66666666666666) internal successors, (784), 6 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,492 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,492 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 110 flow. Second operand 6 states and 784 transitions. [2023-08-27 15:01:40,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 63 transitions, 368 flow [2023-08-27 15:01:40,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 63 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 15:01:40,496 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 177 flow [2023-08-27 15:01:40,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=177, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2023-08-27 15:01:40,498 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-08-27 15:01:40,498 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 177 flow [2023-08-27 15:01:40,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 122.71428571428571) internal successors, (859), 7 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:40,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:01:40,507 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 15:01:40,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:40,704 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:40,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:40,705 INFO L85 PathProgramCache]: Analyzing trace with hash -320994522, now seen corresponding path program 1 times [2023-08-27 15:01:40,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:40,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566971410] [2023-08-27 15:01:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:40,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:01:40,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:40,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566971410] [2023-08-27 15:01:40,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566971410] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:01:40,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:01:40,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 15:01:40,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872557492] [2023-08-27 15:01:40,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:01:40,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:01:40,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:40,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:01:40,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 15:01:40,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 297 [2023-08-27 15:01:40,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 177 flow. Second operand has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:40,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 297 [2023-08-27 15:01:40,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:40,866 INFO L124 PetriNetUnfolderBase]: 202/298 cut-off events. [2023-08-27 15:01:40,866 INFO L125 PetriNetUnfolderBase]: For 289/295 co-relation queries the response was YES. [2023-08-27 15:01:40,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1173 conditions, 298 events. 202/298 cut-off events. For 289/295 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 910 event pairs, 40 based on Foata normal form. 7/196 useless extension candidates. Maximal degree in co-relation 1159. Up to 283 conditions per place. [2023-08-27 15:01:40,869 INFO L140 encePairwiseOnDemand]: 290/297 looper letters, 33 selfloop transitions, 3 changer transitions 0/38 dead transitions. [2023-08-27 15:01:40,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 38 transitions, 256 flow [2023-08-27 15:01:40,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:01:40,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:01:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 387 transitions. [2023-08-27 15:01:40,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2023-08-27 15:01:40,871 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 387 transitions. [2023-08-27 15:01:40,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 387 transitions. [2023-08-27 15:01:40,872 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:40,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 387 transitions. [2023-08-27 15:01:40,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 129.0) internal successors, (387), 3 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,874 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,875 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,875 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 177 flow. Second operand 3 states and 387 transitions. [2023-08-27 15:01:40,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 38 transitions, 256 flow [2023-08-27 15:01:40,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 231 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-27 15:01:40,877 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 169 flow [2023-08-27 15:01:40,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=169, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-27 15:01:40,878 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-27 15:01:40,878 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 169 flow [2023-08-27 15:01:40,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:40,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:01:40,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 15:01:40,878 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:40,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:40,879 INFO L85 PathProgramCache]: Analyzing trace with hash 2126508240, now seen corresponding path program 1 times [2023-08-27 15:01:40,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:40,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625438285] [2023-08-27 15:01:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:40,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:40,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:40,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:01:40,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:40,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625438285] [2023-08-27 15:01:40,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625438285] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:01:40,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:01:40,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 15:01:40,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696426893] [2023-08-27 15:01:40,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:01:40,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 15:01:40,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:40,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 15:01:40,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 15:01:40,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 297 [2023-08-27 15:01:40,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 169 flow. Second operand has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:40,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:40,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 297 [2023-08-27 15:01:40,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:41,063 INFO L124 PetriNetUnfolderBase]: 329/531 cut-off events. [2023-08-27 15:01:41,064 INFO L125 PetriNetUnfolderBase]: For 517/523 co-relation queries the response was YES. [2023-08-27 15:01:41,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2102 conditions, 531 events. 329/531 cut-off events. For 517/523 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1988 event pairs, 56 based on Foata normal form. 20/396 useless extension candidates. Maximal degree in co-relation 2085. Up to 389 conditions per place. [2023-08-27 15:01:41,067 INFO L140 encePairwiseOnDemand]: 289/297 looper letters, 42 selfloop transitions, 25 changer transitions 0/69 dead transitions. [2023-08-27 15:01:41,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 69 transitions, 480 flow [2023-08-27 15:01:41,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 15:01:41,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 15:01:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 538 transitions. [2023-08-27 15:01:41,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45286195286195285 [2023-08-27 15:01:41,070 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 538 transitions. [2023-08-27 15:01:41,070 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 538 transitions. [2023-08-27 15:01:41,070 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:41,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 538 transitions. [2023-08-27 15:01:41,071 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 134.5) internal successors, (538), 4 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:41,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:41,074 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:41,074 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 169 flow. Second operand 4 states and 538 transitions. [2023-08-27 15:01:41,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 69 transitions, 480 flow [2023-08-27 15:01:41,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 69 transitions, 474 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 15:01:41,079 INFO L231 Difference]: Finished difference. Result has 43 places, 55 transitions, 426 flow [2023-08-27 15:01:41,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=426, PETRI_PLACES=43, PETRI_TRANSITIONS=55} [2023-08-27 15:01:41,079 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 10 predicate places. [2023-08-27 15:01:41,079 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 55 transitions, 426 flow [2023-08-27 15:01:41,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 125.25) internal successors, (501), 4 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:41,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:41,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:01:41,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 15:01:41,080 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:41,081 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:41,081 INFO L85 PathProgramCache]: Analyzing trace with hash 782484115, now seen corresponding path program 1 times [2023-08-27 15:01:41,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:41,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592286483] [2023-08-27 15:01:41,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:41,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:41,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:41,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:41,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592286483] [2023-08-27 15:01:41,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592286483] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:01:41,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427130195] [2023-08-27 15:01:41,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:41,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:41,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:01:41,381 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:01:41,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 15:01:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:41,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 15:01:41,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:01:41,543 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:01:41,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:01:41,623 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 15:01:41,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:01:41,699 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 15:01:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:41,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:01:41,987 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:01:41,987 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 15:01:42,002 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:01:42,002 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 87 treesize of output 79 [2023-08-27 15:01:42,011 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 68 treesize of output 56 [2023-08-27 15:01:42,025 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 30 treesize of output 24 [2023-08-27 15:01:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:42,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427130195] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:01:42,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:01:42,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 14 [2023-08-27 15:01:42,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926730288] [2023-08-27 15:01:42,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:01:42,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 15:01:42,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:42,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 15:01:42,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2023-08-27 15:01:42,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:01:42,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 55 transitions, 426 flow. Second operand has 16 states, 16 states have (on average 85.5) internal successors, (1368), 16 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:42,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:42,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:01:42,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:43,881 INFO L124 PetriNetUnfolderBase]: 816/1308 cut-off events. [2023-08-27 15:01:43,881 INFO L125 PetriNetUnfolderBase]: For 2674/2692 co-relation queries the response was YES. [2023-08-27 15:01:43,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6696 conditions, 1308 events. 816/1308 cut-off events. For 2674/2692 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6093 event pairs, 33 based on Foata normal form. 22/937 useless extension candidates. Maximal degree in co-relation 6677. Up to 940 conditions per place. [2023-08-27 15:01:43,901 INFO L140 encePairwiseOnDemand]: 286/297 looper letters, 139 selfloop transitions, 86 changer transitions 1/228 dead transitions. [2023-08-27 15:01:43,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 228 transitions, 2150 flow [2023-08-27 15:01:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 15:01:43,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 15:01:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1918 transitions. [2023-08-27 15:01:43,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3075196408529742 [2023-08-27 15:01:43,909 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1918 transitions. [2023-08-27 15:01:43,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1918 transitions. [2023-08-27 15:01:43,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:43,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1918 transitions. [2023-08-27 15:01:43,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 91.33333333333333) internal successors, (1918), 21 states have internal predecessors, (1918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:43,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 297.0) internal successors, (6534), 22 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:43,925 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 297.0) internal successors, (6534), 22 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:43,925 INFO L175 Difference]: Start difference. First operand has 43 places, 55 transitions, 426 flow. Second operand 21 states and 1918 transitions. [2023-08-27 15:01:43,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 228 transitions, 2150 flow [2023-08-27 15:01:43,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 228 transitions, 1853 flow, removed 143 selfloop flow, removed 1 redundant places. [2023-08-27 15:01:43,945 INFO L231 Difference]: Finished difference. Result has 71 places, 138 transitions, 1323 flow [2023-08-27 15:01:43,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1323, PETRI_PLACES=71, PETRI_TRANSITIONS=138} [2023-08-27 15:01:43,946 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2023-08-27 15:01:43,947 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 138 transitions, 1323 flow [2023-08-27 15:01:43,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 85.5) internal successors, (1368), 16 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:43,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:43,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:01:43,959 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 15:01:44,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-27 15:01:44,154 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:44,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:44,154 INFO L85 PathProgramCache]: Analyzing trace with hash 791296434, now seen corresponding path program 1 times [2023-08-27 15:01:44,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:44,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227998107] [2023-08-27 15:01:44,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:44,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:44,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:44,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227998107] [2023-08-27 15:01:44,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227998107] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:01:44,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107058226] [2023-08-27 15:01:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:44,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:44,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:01:44,593 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:01:44,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 15:01:44,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:44,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 15:01:44,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:01:44,729 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:01:44,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:01:44,788 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 15:01:44,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:01:44,898 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 15:01:44,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:44,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:01:47,128 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:01:47,128 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 15:01:47,138 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:01:47,138 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 15:01:47,146 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 38 treesize of output 32 [2023-08-27 15:01:47,151 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 54 [2023-08-27 15:01:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:47,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107058226] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:01:47,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:01:47,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-27 15:01:47,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491496133] [2023-08-27 15:01:47,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:01:47,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 15:01:47,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:47,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 15:01:47,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=215, Unknown=6, NotChecked=0, Total=272 [2023-08-27 15:01:47,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:01:47,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 138 transitions, 1323 flow. Second operand has 17 states, 17 states have (on average 85.41176470588235) internal successors, (1452), 17 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:47,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:47,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:01:47,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:48,168 INFO L124 PetriNetUnfolderBase]: 788/1276 cut-off events. [2023-08-27 15:01:48,168 INFO L125 PetriNetUnfolderBase]: For 4898/4918 co-relation queries the response was YES. [2023-08-27 15:01:48,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7268 conditions, 1276 events. 788/1276 cut-off events. For 4898/4918 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 6011 event pairs, 104 based on Foata normal form. 20/1007 useless extension candidates. Maximal degree in co-relation 7239. Up to 1009 conditions per place. [2023-08-27 15:01:48,181 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 129 selfloop transitions, 38 changer transitions 0/169 dead transitions. [2023-08-27 15:01:48,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 169 transitions, 1980 flow [2023-08-27 15:01:48,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 15:01:48,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 15:01:48,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1071 transitions. [2023-08-27 15:01:48,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3005050505050505 [2023-08-27 15:01:48,185 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1071 transitions. [2023-08-27 15:01:48,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1071 transitions. [2023-08-27 15:01:48,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:48,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1071 transitions. [2023-08-27 15:01:48,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 89.25) internal successors, (1071), 12 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:48,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 297.0) internal successors, (3861), 13 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:48,228 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 297.0) internal successors, (3861), 13 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:48,228 INFO L175 Difference]: Start difference. First operand has 71 places, 138 transitions, 1323 flow. Second operand 12 states and 1071 transitions. [2023-08-27 15:01:48,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 169 transitions, 1980 flow [2023-08-27 15:01:48,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 169 transitions, 1858 flow, removed 57 selfloop flow, removed 3 redundant places. [2023-08-27 15:01:48,250 INFO L231 Difference]: Finished difference. Result has 81 places, 135 transitions, 1287 flow [2023-08-27 15:01:48,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1287, PETRI_PLACES=81, PETRI_TRANSITIONS=135} [2023-08-27 15:01:48,251 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2023-08-27 15:01:48,251 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 135 transitions, 1287 flow [2023-08-27 15:01:48,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.41176470588235) internal successors, (1452), 17 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:48,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:48,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:01:48,263 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 15:01:48,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:48,458 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:48,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:48,459 INFO L85 PathProgramCache]: Analyzing trace with hash 791296485, now seen corresponding path program 1 times [2023-08-27 15:01:48,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:48,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032495714] [2023-08-27 15:01:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:48,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:49,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:49,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:49,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032495714] [2023-08-27 15:01:49,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032495714] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:01:49,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063861390] [2023-08-27 15:01:49,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:49,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:49,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:01:49,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:01:49,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 15:01:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:49,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 15:01:49,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:01:49,196 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 15:01:49,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:01:49,249 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 15:01:49,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:01:49,343 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 15:01:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:49,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:01:49,536 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:01:49,536 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 15:01:49,546 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:01:49,546 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 157 [2023-08-27 15:01:49,553 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 15:01:49,592 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 15:01:49,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:49,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063861390] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:01:49,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:01:49,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-27 15:01:49,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864726238] [2023-08-27 15:01:49,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:01:49,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 15:01:49,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:49,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 15:01:49,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=214, Unknown=5, NotChecked=0, Total=272 [2023-08-27 15:01:49,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:01:49,633 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 135 transitions, 1287 flow. Second operand has 17 states, 17 states have (on average 85.41176470588235) internal successors, (1452), 17 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:49,633 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:49,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:01:49,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:49,965 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (+ (* c_~q_front~0 4) c_~q~0.offset))) (and (forall ((v_ArrVal_309 (Array Int Int))) (< (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_309) c_~q~0.base) .cse0)) 2147483648)) (< (+ c_~s~0 (select (select |c_#memory_int| c_~q~0.base) .cse0)) 2147483648))) is different from false [2023-08-27 15:01:52,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:01:52,507 INFO L124 PetriNetUnfolderBase]: 830/1305 cut-off events. [2023-08-27 15:01:52,507 INFO L125 PetriNetUnfolderBase]: For 5434/5452 co-relation queries the response was YES. [2023-08-27 15:01:52,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7577 conditions, 1305 events. 830/1305 cut-off events. For 5434/5452 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 5812 event pairs, 53 based on Foata normal form. 54/1014 useless extension candidates. Maximal degree in co-relation 7545. Up to 987 conditions per place. [2023-08-27 15:01:52,519 INFO L140 encePairwiseOnDemand]: 282/297 looper letters, 124 selfloop transitions, 83 changer transitions 2/211 dead transitions. [2023-08-27 15:01:52,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 211 transitions, 2455 flow [2023-08-27 15:01:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 15:01:52,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 15:01:52,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1002 transitions. [2023-08-27 15:01:52,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30670339761248855 [2023-08-27 15:01:52,522 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1002 transitions. [2023-08-27 15:01:52,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1002 transitions. [2023-08-27 15:01:52,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:52,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1002 transitions. [2023-08-27 15:01:52,525 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 91.0909090909091) internal successors, (1002), 11 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:52,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 297.0) internal successors, (3564), 12 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:52,529 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 297.0) internal successors, (3564), 12 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:52,529 INFO L175 Difference]: Start difference. First operand has 81 places, 135 transitions, 1287 flow. Second operand 11 states and 1002 transitions. [2023-08-27 15:01:52,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 211 transitions, 2455 flow [2023-08-27 15:01:52,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 211 transitions, 2316 flow, removed 41 selfloop flow, removed 10 redundant places. [2023-08-27 15:01:52,548 INFO L231 Difference]: Finished difference. Result has 83 places, 174 transitions, 1895 flow [2023-08-27 15:01:52,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1895, PETRI_PLACES=83, PETRI_TRANSITIONS=174} [2023-08-27 15:01:52,548 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 50 predicate places. [2023-08-27 15:01:52,548 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 174 transitions, 1895 flow [2023-08-27 15:01:52,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.41176470588235) internal successors, (1452), 17 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:52,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:52,549 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:01:52,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 15:01:52,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:52,763 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:52,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:52,764 INFO L85 PathProgramCache]: Analyzing trace with hash 113565338, now seen corresponding path program 1 times [2023-08-27 15:01:52,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:52,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325232423] [2023-08-27 15:01:52,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:52,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:52,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:53,537 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:53,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:53,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325232423] [2023-08-27 15:01:53,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325232423] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:01:53,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469236153] [2023-08-27 15:01:53,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:53,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:53,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:01:53,541 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:01:53,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 15:01:53,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:53,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 15:01:53,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:01:53,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:01:53,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:01:53,745 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:01:53,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-27 15:01:53,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:01:53,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469236153] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 15:01:53,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 15:01:53,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6, 3] total 11 [2023-08-27 15:01:53,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517472597] [2023-08-27 15:01:53,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:01:53,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 15:01:53,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:53,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 15:01:53,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-08-27 15:01:53,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 297 [2023-08-27 15:01:53,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 174 transitions, 1895 flow. Second operand has 4 states, 4 states have (on average 109.25) internal successors, (437), 4 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:53,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:53,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 297 [2023-08-27 15:01:53,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:54,070 INFO L124 PetriNetUnfolderBase]: 844/1356 cut-off events. [2023-08-27 15:01:54,070 INFO L125 PetriNetUnfolderBase]: For 6401/6421 co-relation queries the response was YES. [2023-08-27 15:01:54,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8592 conditions, 1356 events. 844/1356 cut-off events. For 6401/6421 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 6302 event pairs, 60 based on Foata normal form. 16/1118 useless extension candidates. Maximal degree in co-relation 8560. Up to 1122 conditions per place. [2023-08-27 15:01:54,089 INFO L140 encePairwiseOnDemand]: 289/297 looper letters, 159 selfloop transitions, 37 changer transitions 1/199 dead transitions. [2023-08-27 15:01:54,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 199 transitions, 2523 flow [2023-08-27 15:01:54,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 15:01:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 15:01:54,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 463 transitions. [2023-08-27 15:01:54,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897306397306397 [2023-08-27 15:01:54,091 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 463 transitions. [2023-08-27 15:01:54,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 463 transitions. [2023-08-27 15:01:54,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:54,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 463 transitions. [2023-08-27 15:01:54,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:54,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:54,094 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:54,094 INFO L175 Difference]: Start difference. First operand has 83 places, 174 transitions, 1895 flow. Second operand 4 states and 463 transitions. [2023-08-27 15:01:54,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 199 transitions, 2523 flow [2023-08-27 15:01:54,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 199 transitions, 2450 flow, removed 22 selfloop flow, removed 5 redundant places. [2023-08-27 15:01:54,120 INFO L231 Difference]: Finished difference. Result has 82 places, 178 transitions, 1975 flow [2023-08-27 15:01:54,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1757, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1975, PETRI_PLACES=82, PETRI_TRANSITIONS=178} [2023-08-27 15:01:54,121 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 49 predicate places. [2023-08-27 15:01:54,121 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 178 transitions, 1975 flow [2023-08-27 15:01:54,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.25) internal successors, (437), 4 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:54,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:54,121 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:01:54,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 15:01:54,327 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,SelfDestructingSolverStorable14 [2023-08-27 15:01:54,328 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:54,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:54,328 INFO L85 PathProgramCache]: Analyzing trace with hash 768837014, now seen corresponding path program 1 times [2023-08-27 15:01:54,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:54,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013114084] [2023-08-27 15:01:54,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:54,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:54,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:01:55,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:55,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013114084] [2023-08-27 15:01:55,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013114084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:01:55,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934437777] [2023-08-27 15:01:55,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:55,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:55,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:01:55,017 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:01:55,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 15:01:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:55,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 15:01:55,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:01:55,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:01:55,189 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:01:55,218 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:01:55,218 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-27 15:01:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:01:55,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934437777] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 15:01:55,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 15:01:55,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6, 3] total 11 [2023-08-27 15:01:55,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859411932] [2023-08-27 15:01:55,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:01:55,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 15:01:55,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:55,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 15:01:55,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-08-27 15:01:55,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 297 [2023-08-27 15:01:55,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 178 transitions, 1975 flow. Second operand has 4 states, 4 states have (on average 109.25) internal successors, (437), 4 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:55,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:55,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 297 [2023-08-27 15:01:55,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:55,523 INFO L124 PetriNetUnfolderBase]: 840/1357 cut-off events. [2023-08-27 15:01:55,523 INFO L125 PetriNetUnfolderBase]: For 6941/6961 co-relation queries the response was YES. [2023-08-27 15:01:55,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8971 conditions, 1357 events. 840/1357 cut-off events. For 6941/6961 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 6370 event pairs, 60 based on Foata normal form. 16/1128 useless extension candidates. Maximal degree in co-relation 8937. Up to 1094 conditions per place. [2023-08-27 15:01:55,540 INFO L140 encePairwiseOnDemand]: 289/297 looper letters, 148 selfloop transitions, 46 changer transitions 1/197 dead transitions. [2023-08-27 15:01:55,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 197 transitions, 2562 flow [2023-08-27 15:01:55,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 15:01:55,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 15:01:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 462 transitions. [2023-08-27 15:01:55,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2023-08-27 15:01:55,542 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 462 transitions. [2023-08-27 15:01:55,542 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 462 transitions. [2023-08-27 15:01:55,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:55,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 462 transitions. [2023-08-27 15:01:55,544 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.5) internal successors, (462), 4 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:55,545 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:55,545 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:55,546 INFO L175 Difference]: Start difference. First operand has 82 places, 178 transitions, 1975 flow. Second operand 4 states and 462 transitions. [2023-08-27 15:01:55,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 197 transitions, 2562 flow [2023-08-27 15:01:55,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 197 transitions, 2479 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-27 15:01:55,567 INFO L231 Difference]: Finished difference. Result has 83 places, 178 transitions, 2037 flow [2023-08-27 15:01:55,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1856, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2037, PETRI_PLACES=83, PETRI_TRANSITIONS=178} [2023-08-27 15:01:55,568 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 50 predicate places. [2023-08-27 15:01:55,568 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 178 transitions, 2037 flow [2023-08-27 15:01:55,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.25) internal successors, (437), 4 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:55,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:55,568 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:01:55,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 15:01:55,774 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,SelfDestructingSolverStorable15 [2023-08-27 15:01:55,775 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:55,775 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:55,775 INFO L85 PathProgramCache]: Analyzing trace with hash -934543508, now seen corresponding path program 1 times [2023-08-27 15:01:55,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:55,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222641073] [2023-08-27 15:01:55,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:55,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:55,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:01:55,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:55,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222641073] [2023-08-27 15:01:55,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222641073] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:01:55,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686119818] [2023-08-27 15:01:55,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:55,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:55,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:01:55,864 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:01:55,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 15:01:55,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:55,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 15:01:55,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:01:56,017 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:01:56,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:01:56,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:01:56,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686119818] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:01:56,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:01:56,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 14 [2023-08-27 15:01:56,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810543172] [2023-08-27 15:01:56,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:01:56,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 15:01:56,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:56,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 15:01:56,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-08-27 15:01:56,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 297 [2023-08-27 15:01:56,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 178 transitions, 2037 flow. Second operand has 14 states, 14 states have (on average 105.85714285714286) internal successors, (1482), 14 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:56,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:56,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 297 [2023-08-27 15:01:56,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:56,445 INFO L124 PetriNetUnfolderBase]: 774/1233 cut-off events. [2023-08-27 15:01:56,445 INFO L125 PetriNetUnfolderBase]: For 6260/6260 co-relation queries the response was YES. [2023-08-27 15:01:56,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8349 conditions, 1233 events. 774/1233 cut-off events. For 6260/6260 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5325 event pairs, 65 based on Foata normal form. 63/1022 useless extension candidates. Maximal degree in co-relation 8315. Up to 745 conditions per place. [2023-08-27 15:01:56,459 INFO L140 encePairwiseOnDemand]: 290/297 looper letters, 207 selfloop transitions, 64 changer transitions 10/282 dead transitions. [2023-08-27 15:01:56,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 282 transitions, 3793 flow [2023-08-27 15:01:56,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 15:01:56,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 15:01:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1442 transitions. [2023-08-27 15:01:56,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3734783734783735 [2023-08-27 15:01:56,463 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1442 transitions. [2023-08-27 15:01:56,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1442 transitions. [2023-08-27 15:01:56,464 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:56,464 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1442 transitions. [2023-08-27 15:01:56,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 110.92307692307692) internal successors, (1442), 13 states have internal predecessors, (1442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:56,471 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 297.0) internal successors, (4158), 14 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:56,472 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 297.0) internal successors, (4158), 14 states have internal predecessors, (4158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:56,472 INFO L175 Difference]: Start difference. First operand has 83 places, 178 transitions, 2037 flow. Second operand 13 states and 1442 transitions. [2023-08-27 15:01:56,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 282 transitions, 3793 flow [2023-08-27 15:01:56,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 282 transitions, 3675 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-08-27 15:01:56,494 INFO L231 Difference]: Finished difference. Result has 87 places, 158 transitions, 1966 flow [2023-08-27 15:01:56,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1698, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1966, PETRI_PLACES=87, PETRI_TRANSITIONS=158} [2023-08-27 15:01:56,495 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 54 predicate places. [2023-08-27 15:01:56,495 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 158 transitions, 1966 flow [2023-08-27 15:01:56,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 105.85714285714286) internal successors, (1482), 14 states have internal predecessors, (1482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:56,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:56,496 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:01:56,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 15:01:56,701 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,SelfDestructingSolverStorable16 [2023-08-27 15:01:56,702 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:56,702 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:56,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1979412187, now seen corresponding path program 2 times [2023-08-27 15:01:56,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:56,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385988208] [2023-08-27 15:01:56,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:56,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:57,780 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 15:01:57,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:57,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385988208] [2023-08-27 15:01:57,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385988208] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:01:57,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727116240] [2023-08-27 15:01:57,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:01:57,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:57,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:01:57,782 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:01:57,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 15:01:57,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 15:01:57,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:01:57,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 15:01:57,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:01:57,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:01:57,986 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 15:01:58,014 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 15:01:58,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:01:58,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727116240] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:01:58,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 15:01:58,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-08-27 15:01:58,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14145085] [2023-08-27 15:01:58,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:01:58,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 15:01:58,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:58,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 15:01:58,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-08-27 15:01:58,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 297 [2023-08-27 15:01:58,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 158 transitions, 1966 flow. Second operand has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:58,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:58,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 297 [2023-08-27 15:01:58,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:58,293 INFO L124 PetriNetUnfolderBase]: 745/1178 cut-off events. [2023-08-27 15:01:58,293 INFO L125 PetriNetUnfolderBase]: For 6409/6429 co-relation queries the response was YES. [2023-08-27 15:01:58,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8191 conditions, 1178 events. 745/1178 cut-off events. For 6409/6429 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 4924 event pairs, 74 based on Foata normal form. 22/938 useless extension candidates. Maximal degree in co-relation 8158. Up to 1087 conditions per place. [2023-08-27 15:01:58,306 INFO L140 encePairwiseOnDemand]: 290/297 looper letters, 148 selfloop transitions, 18 changer transitions 0/169 dead transitions. [2023-08-27 15:01:58,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 169 transitions, 2364 flow [2023-08-27 15:01:58,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 15:01:58,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 15:01:58,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 432 transitions. [2023-08-27 15:01:58,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2023-08-27 15:01:58,308 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 432 transitions. [2023-08-27 15:01:58,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 432 transitions. [2023-08-27 15:01:58,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:58,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 432 transitions. [2023-08-27 15:01:58,309 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.0) internal successors, (432), 4 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:58,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:58,311 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:58,311 INFO L175 Difference]: Start difference. First operand has 87 places, 158 transitions, 1966 flow. Second operand 4 states and 432 transitions. [2023-08-27 15:01:58,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 169 transitions, 2364 flow [2023-08-27 15:01:58,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 169 transitions, 2236 flow, removed 30 selfloop flow, removed 8 redundant places. [2023-08-27 15:01:58,332 INFO L231 Difference]: Finished difference. Result has 80 places, 160 transitions, 1918 flow [2023-08-27 15:01:58,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1820, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1918, PETRI_PLACES=80, PETRI_TRANSITIONS=160} [2023-08-27 15:01:58,332 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 47 predicate places. [2023-08-27 15:01:58,332 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 160 transitions, 1918 flow [2023-08-27 15:01:58,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:58,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:01:58,333 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:01:58,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 15:01:58,538 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,SelfDestructingSolverStorable17 [2023-08-27 15:01:58,538 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:01:58,539 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:01:58,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1970176977, now seen corresponding path program 2 times [2023-08-27 15:01:58,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:01:58,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154575160] [2023-08-27 15:01:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:01:58,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:01:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:01:59,449 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 15:01:59,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:01:59,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154575160] [2023-08-27 15:01:59,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154575160] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:01:59,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846890101] [2023-08-27 15:01:59,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:01:59,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:01:59,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:01:59,451 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:01:59,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 15:01:59,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 15:01:59,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:01:59,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 15:01:59,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:01:59,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:01:59,665 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 15:01:59,695 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 15:01:59,695 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:01:59,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846890101] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:01:59,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 15:01:59,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-08-27 15:01:59,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017156827] [2023-08-27 15:01:59,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:01:59,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 15:01:59,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:01:59,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 15:01:59,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2023-08-27 15:01:59,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 297 [2023-08-27 15:01:59,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 160 transitions, 1918 flow. Second operand has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:59,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:01:59,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 297 [2023-08-27 15:01:59,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:01:59,976 INFO L124 PetriNetUnfolderBase]: 598/1025 cut-off events. [2023-08-27 15:01:59,977 INFO L125 PetriNetUnfolderBase]: For 6234/6254 co-relation queries the response was YES. [2023-08-27 15:01:59,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6913 conditions, 1025 events. 598/1025 cut-off events. For 6234/6254 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4542 event pairs, 41 based on Foata normal form. 18/934 useless extension candidates. Maximal degree in co-relation 6880. Up to 641 conditions per place. [2023-08-27 15:01:59,988 INFO L140 encePairwiseOnDemand]: 290/297 looper letters, 136 selfloop transitions, 27 changer transitions 0/166 dead transitions. [2023-08-27 15:01:59,989 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 166 transitions, 2261 flow [2023-08-27 15:01:59,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 15:01:59,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 15:01:59,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 435 transitions. [2023-08-27 15:01:59,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3661616161616162 [2023-08-27 15:01:59,990 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 435 transitions. [2023-08-27 15:01:59,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 435 transitions. [2023-08-27 15:01:59,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:01:59,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 435 transitions. [2023-08-27 15:01:59,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:59,993 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:59,993 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:01:59,993 INFO L175 Difference]: Start difference. First operand has 80 places, 160 transitions, 1918 flow. Second operand 4 states and 435 transitions. [2023-08-27 15:01:59,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 166 transitions, 2261 flow [2023-08-27 15:02:00,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 166 transitions, 2233 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-27 15:02:00,011 INFO L231 Difference]: Finished difference. Result has 81 places, 148 transitions, 1819 flow [2023-08-27 15:02:00,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1676, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1819, PETRI_PLACES=81, PETRI_TRANSITIONS=148} [2023-08-27 15:02:00,012 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2023-08-27 15:02:00,012 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 148 transitions, 1819 flow [2023-08-27 15:02:00,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:00,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:00,013 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:00,021 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 15:02:00,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:00,221 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:00,222 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:00,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1979412238, now seen corresponding path program 2 times [2023-08-27 15:02:00,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:00,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817902376] [2023-08-27 15:02:00,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:00,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:00,942 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 15:02:00,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:00,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817902376] [2023-08-27 15:02:00,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817902376] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:00,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889185889] [2023-08-27 15:02:00,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:02:00,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:00,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:02:00,944 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:02:00,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 15:02:01,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 15:02:01,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:02:01,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 15:02:01,037 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:02:01,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:02:01,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 15:02:01,162 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 15:02:01,162 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:02:01,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889185889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:02:01,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 15:02:01,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 11 [2023-08-27 15:02:01,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330333380] [2023-08-27 15:02:01,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:02:01,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 15:02:01,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:01,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 15:02:01,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-08-27 15:02:01,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 297 [2023-08-27 15:02:01,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 148 transitions, 1819 flow. Second operand has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:01,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:01,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 297 [2023-08-27 15:02:01,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:01,384 INFO L124 PetriNetUnfolderBase]: 594/1021 cut-off events. [2023-08-27 15:02:01,384 INFO L125 PetriNetUnfolderBase]: For 6683/6703 co-relation queries the response was YES. [2023-08-27 15:02:01,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7208 conditions, 1021 events. 594/1021 cut-off events. For 6683/6703 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 4544 event pairs, 79 based on Foata normal form. 14/930 useless extension candidates. Maximal degree in co-relation 7175. Up to 930 conditions per place. [2023-08-27 15:02:01,392 INFO L140 encePairwiseOnDemand]: 292/297 looper letters, 136 selfloop transitions, 17 changer transitions 0/156 dead transitions. [2023-08-27 15:02:01,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 156 transitions, 2159 flow [2023-08-27 15:02:01,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 15:02:01,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 15:02:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 430 transitions. [2023-08-27 15:02:01,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36195286195286197 [2023-08-27 15:02:01,393 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 430 transitions. [2023-08-27 15:02:01,393 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 430 transitions. [2023-08-27 15:02:01,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:01,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 430 transitions. [2023-08-27 15:02:01,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 107.5) internal successors, (430), 4 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:01,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:01,396 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 297.0) internal successors, (1485), 5 states have internal predecessors, (1485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:01,396 INFO L175 Difference]: Start difference. First operand has 81 places, 148 transitions, 1819 flow. Second operand 4 states and 430 transitions. [2023-08-27 15:02:01,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 156 transitions, 2159 flow [2023-08-27 15:02:01,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 156 transitions, 2116 flow, removed 5 selfloop flow, removed 2 redundant places. [2023-08-27 15:02:01,411 INFO L231 Difference]: Finished difference. Result has 82 places, 147 transitions, 1796 flow [2023-08-27 15:02:01,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1796, PETRI_PLACES=82, PETRI_TRANSITIONS=147} [2023-08-27 15:02:01,412 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 49 predicate places. [2023-08-27 15:02:01,412 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 147 transitions, 1796 flow [2023-08-27 15:02:01,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:01,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:01,412 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:01,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 15:02:01,617 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,SelfDestructingSolverStorable19 [2023-08-27 15:02:01,617 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:01,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:01,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1970177028, now seen corresponding path program 1 times [2023-08-27 15:02:01,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:01,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562776373] [2023-08-27 15:02:01,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:01,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:01,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:02,264 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 15:02:02,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:02,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562776373] [2023-08-27 15:02:02,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562776373] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:02,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841759174] [2023-08-27 15:02:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:02,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:02,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:02:02,266 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:02:02,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 15:02:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:02,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 15:02:02,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:02:02,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:02:02,499 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 15:02:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:02:02,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:02:02,555 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_563 (Array Int Int))) (< 0 (+ c_~s~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_563) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset)) 2147483649))) is different from false [2023-08-27 15:02:02,573 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:02:02,573 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 40 [2023-08-27 15:02:02,586 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-08-27 15:02:02,658 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 15:02:02,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841759174] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:02,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 15:02:02,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 6] total 17 [2023-08-27 15:02:02,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593590883] [2023-08-27 15:02:02,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:02:02,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 15:02:02,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:02,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 15:02:02,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=253, Unknown=1, NotChecked=32, Total=342 [2023-08-27 15:02:02,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 297 [2023-08-27 15:02:02,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 147 transitions, 1796 flow. Second operand has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:02,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:02,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 297 [2023-08-27 15:02:02,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:02,914 INFO L124 PetriNetUnfolderBase]: 680/1170 cut-off events. [2023-08-27 15:02:02,914 INFO L125 PetriNetUnfolderBase]: For 8237/8257 co-relation queries the response was YES. [2023-08-27 15:02:02,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8086 conditions, 1170 events. 680/1170 cut-off events. For 8237/8257 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5424 event pairs, 55 based on Foata normal form. 14/1081 useless extension candidates. Maximal degree in co-relation 8053. Up to 819 conditions per place. [2023-08-27 15:02:02,923 INFO L140 encePairwiseOnDemand]: 289/297 looper letters, 139 selfloop transitions, 38 changer transitions 0/180 dead transitions. [2023-08-27 15:02:02,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 180 transitions, 2500 flow [2023-08-27 15:02:02,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 15:02:02,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 15:02:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 539 transitions. [2023-08-27 15:02:02,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362962962962963 [2023-08-27 15:02:02,925 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 539 transitions. [2023-08-27 15:02:02,925 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 539 transitions. [2023-08-27 15:02:02,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:02,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 539 transitions. [2023-08-27 15:02:02,927 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 107.8) internal successors, (539), 5 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:02,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 297.0) internal successors, (1782), 6 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:02,928 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 297.0) internal successors, (1782), 6 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:02,929 INFO L175 Difference]: Start difference. First operand has 82 places, 147 transitions, 1796 flow. Second operand 5 states and 539 transitions. [2023-08-27 15:02:02,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 180 transitions, 2500 flow [2023-08-27 15:02:02,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 180 transitions, 2466 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 15:02:02,947 INFO L231 Difference]: Finished difference. Result has 85 places, 161 transitions, 2067 flow [2023-08-27 15:02:02,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=1748, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2067, PETRI_PLACES=85, PETRI_TRANSITIONS=161} [2023-08-27 15:02:02,948 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 52 predicate places. [2023-08-27 15:02:02,948 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 161 transitions, 2067 flow [2023-08-27 15:02:02,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 101.33333333333333) internal successors, (608), 6 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:02,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:02,948 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:02,959 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 15:02:03,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:03,154 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:03,154 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:03,154 INFO L85 PathProgramCache]: Analyzing trace with hash 90324139, now seen corresponding path program 1 times [2023-08-27 15:02:03,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:03,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657560133] [2023-08-27 15:02:03,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:03,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:03,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:04,001 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 15:02:04,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:04,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657560133] [2023-08-27 15:02:04,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657560133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:04,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148822418] [2023-08-27 15:02:04,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:04,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:04,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:02:04,003 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:02:04,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 15:02:04,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:04,106 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 21 conjunts are in the unsatisfiable core [2023-08-27 15:02:04,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:02:04,204 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 15:02:04,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:02:04,256 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:02:04,256 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-08-27 15:02:04,270 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 15:02:04,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148822418] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:02:04,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:02:04,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5, 4] total 15 [2023-08-27 15:02:04,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375427120] [2023-08-27 15:02:04,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:02:04,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 15:02:04,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:04,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 15:02:04,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2023-08-27 15:02:04,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:02:04,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 161 transitions, 2067 flow. Second operand has 17 states, 17 states have (on average 85.52941176470588) internal successors, (1454), 17 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:04,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:04,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:02:04,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:05,385 INFO L124 PetriNetUnfolderBase]: 916/1550 cut-off events. [2023-08-27 15:02:05,386 INFO L125 PetriNetUnfolderBase]: For 11173/11193 co-relation queries the response was YES. [2023-08-27 15:02:05,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11390 conditions, 1550 events. 916/1550 cut-off events. For 11173/11193 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 7702 event pairs, 35 based on Foata normal form. 14/1349 useless extension candidates. Maximal degree in co-relation 11355. Up to 759 conditions per place. [2023-08-27 15:02:05,398 INFO L140 encePairwiseOnDemand]: 286/297 looper letters, 178 selfloop transitions, 110 changer transitions 0/291 dead transitions. [2023-08-27 15:02:05,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 291 transitions, 3965 flow [2023-08-27 15:02:05,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 15:02:05,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 15:02:05,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1564 transitions. [2023-08-27 15:02:05,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30976430976430974 [2023-08-27 15:02:05,402 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1564 transitions. [2023-08-27 15:02:05,402 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1564 transitions. [2023-08-27 15:02:05,405 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:05,405 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1564 transitions. [2023-08-27 15:02:05,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 92.0) internal successors, (1564), 17 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:05,412 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 297.0) internal successors, (5346), 18 states have internal predecessors, (5346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:05,413 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 297.0) internal successors, (5346), 18 states have internal predecessors, (5346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:05,413 INFO L175 Difference]: Start difference. First operand has 85 places, 161 transitions, 2067 flow. Second operand 17 states and 1564 transitions. [2023-08-27 15:02:05,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 291 transitions, 3965 flow [2023-08-27 15:02:05,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 291 transitions, 3901 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-27 15:02:05,438 INFO L231 Difference]: Finished difference. Result has 99 places, 191 transitions, 2687 flow [2023-08-27 15:02:05,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=2019, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2687, PETRI_PLACES=99, PETRI_TRANSITIONS=191} [2023-08-27 15:02:05,439 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 66 predicate places. [2023-08-27 15:02:05,439 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 191 transitions, 2687 flow [2023-08-27 15:02:05,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 85.52941176470588) internal successors, (1454), 17 states have internal predecessors, (1454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:05,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:05,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:05,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 15:02:05,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:05,645 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:05,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:05,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1485238416, now seen corresponding path program 1 times [2023-08-27 15:02:05,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:05,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528446533] [2023-08-27 15:02:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:05,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:02:06,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:06,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528446533] [2023-08-27 15:02:06,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528446533] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:06,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610016182] [2023-08-27 15:02:06,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:06,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:06,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:02:06,308 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:02:06,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 15:02:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:06,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 15:02:06,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:02:06,465 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-27 15:02:06,512 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2023-08-27 15:02:06,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:02:06,581 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 15:02:06,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:02:06,776 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 31 treesize of output 31 [2023-08-27 15:02:06,912 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 15:02:06,912 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:02:06,974 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_637 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_637) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) 2147483648)) is different from false [2023-08-27 15:02:07,326 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:02:07,327 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 112 treesize of output 77 [2023-08-27 15:02:07,355 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:02:07,359 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 155 treesize of output 167 [2023-08-27 15:02:07,368 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 67 [2023-08-27 15:02:07,388 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:02:07,389 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 63 [2023-08-27 15:02:08,245 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 15:02:08,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610016182] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:02:08,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:02:08,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-27 15:02:08,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209537418] [2023-08-27 15:02:08,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:02:08,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 15:02:08,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:08,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 15:02:08,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=513, Unknown=2, NotChecked=46, Total=650 [2023-08-27 15:02:08,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:02:08,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 191 transitions, 2687 flow. Second operand has 26 states, 26 states have (on average 85.26923076923077) internal successors, (2217), 26 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:08,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:08,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:02:08,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:13,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:02:15,877 INFO L124 PetriNetUnfolderBase]: 1630/2767 cut-off events. [2023-08-27 15:02:15,877 INFO L125 PetriNetUnfolderBase]: For 19903/19915 co-relation queries the response was YES. [2023-08-27 15:02:15,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20957 conditions, 2767 events. 1630/2767 cut-off events. For 19903/19915 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 15724 event pairs, 238 based on Foata normal form. 6/2324 useless extension candidates. Maximal degree in co-relation 20922. Up to 1453 conditions per place. [2023-08-27 15:02:15,903 INFO L140 encePairwiseOnDemand]: 283/297 looper letters, 212 selfloop transitions, 227 changer transitions 1/443 dead transitions. [2023-08-27 15:02:15,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 443 transitions, 6533 flow [2023-08-27 15:02:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 15:02:15,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 15:02:15,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2533 transitions. [2023-08-27 15:02:15,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3045935545935546 [2023-08-27 15:02:15,908 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2533 transitions. [2023-08-27 15:02:15,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2533 transitions. [2023-08-27 15:02:15,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:15,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2533 transitions. [2023-08-27 15:02:15,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 90.46428571428571) internal successors, (2533), 28 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:15,919 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 297.0) internal successors, (8613), 29 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:15,920 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 297.0) internal successors, (8613), 29 states have internal predecessors, (8613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:15,921 INFO L175 Difference]: Start difference. First operand has 99 places, 191 transitions, 2687 flow. Second operand 28 states and 2533 transitions. [2023-08-27 15:02:15,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 443 transitions, 6533 flow [2023-08-27 15:02:15,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 443 transitions, 5738 flow, removed 266 selfloop flow, removed 7 redundant places. [2023-08-27 15:02:15,977 INFO L231 Difference]: Finished difference. Result has 134 places, 352 transitions, 5286 flow [2023-08-27 15:02:15,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=2304, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=5286, PETRI_PLACES=134, PETRI_TRANSITIONS=352} [2023-08-27 15:02:15,978 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 101 predicate places. [2023-08-27 15:02:15,978 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 352 transitions, 5286 flow [2023-08-27 15:02:15,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 85.26923076923077) internal successors, (2217), 26 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:15,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:15,978 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:15,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 15:02:16,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-27 15:02:16,184 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:16,185 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:16,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1180169854, now seen corresponding path program 2 times [2023-08-27 15:02:16,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:16,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963850596] [2023-08-27 15:02:16,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:16,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:02:16,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:16,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963850596] [2023-08-27 15:02:16,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963850596] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:16,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268245517] [2023-08-27 15:02:16,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:02:16,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:16,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:02:16,289 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:02:16,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 15:02:16,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 15:02:16,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:02:16,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 15:02:16,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:02:16,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-27 15:02:16,408 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 15:02:16,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268245517] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:02:16,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 15:02:16,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [7] total 8 [2023-08-27 15:02:16,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973110198] [2023-08-27 15:02:16,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:02:16,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 15:02:16,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:16,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 15:02:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-08-27 15:02:16,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 297 [2023-08-27 15:02:16,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 352 transitions, 5286 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:16,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:16,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 297 [2023-08-27 15:02:16,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:16,804 INFO L124 PetriNetUnfolderBase]: 1432/2426 cut-off events. [2023-08-27 15:02:16,804 INFO L125 PetriNetUnfolderBase]: For 26517/26529 co-relation queries the response was YES. [2023-08-27 15:02:16,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19657 conditions, 2426 events. 1432/2426 cut-off events. For 26517/26529 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 13470 event pairs, 368 based on Foata normal form. 141/2339 useless extension candidates. Maximal degree in co-relation 19608. Up to 2391 conditions per place. [2023-08-27 15:02:16,824 INFO L140 encePairwiseOnDemand]: 295/297 looper letters, 332 selfloop transitions, 1 changer transitions 0/336 dead transitions. [2023-08-27 15:02:16,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 336 transitions, 5652 flow [2023-08-27 15:02:16,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 15:02:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 15:02:16,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 381 transitions. [2023-08-27 15:02:16,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4276094276094276 [2023-08-27 15:02:16,825 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 381 transitions. [2023-08-27 15:02:16,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 381 transitions. [2023-08-27 15:02:16,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:16,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 381 transitions. [2023-08-27 15:02:16,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.0) internal successors, (381), 3 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:16,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:16,828 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 297.0) internal successors, (1188), 4 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:16,828 INFO L175 Difference]: Start difference. First operand has 134 places, 352 transitions, 5286 flow. Second operand 3 states and 381 transitions. [2023-08-27 15:02:16,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 336 transitions, 5652 flow [2023-08-27 15:02:16,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 336 transitions, 5121 flow, removed 195 selfloop flow, removed 12 redundant places. [2023-08-27 15:02:16,930 INFO L231 Difference]: Finished difference. Result has 122 places, 336 transitions, 4457 flow [2023-08-27 15:02:16,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=4455, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=4457, PETRI_PLACES=122, PETRI_TRANSITIONS=336} [2023-08-27 15:02:16,931 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 89 predicate places. [2023-08-27 15:02:16,931 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 336 transitions, 4457 flow [2023-08-27 15:02:16,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:16,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:16,931 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:16,939 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 15:02:17,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:17,136 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:17,137 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:17,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1309268340, now seen corresponding path program 1 times [2023-08-27 15:02:17,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:17,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867790320] [2023-08-27 15:02:17,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:17,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:02:17,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:17,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867790320] [2023-08-27 15:02:17,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867790320] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:17,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129280307] [2023-08-27 15:02:17,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:17,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:17,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:02:17,993 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:02:18,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 15:02:18,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:18,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 15:02:18,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:02:18,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:02:18,274 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 15:02:18,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:02:18,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:02:18,339 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_714 (Array Int Int))) (< 0 (+ c_~s~0 2147483649 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_714) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset))))) is different from false [2023-08-27 15:02:18,356 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:02:18,357 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 40 [2023-08-27 15:02:18,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2023-08-27 15:02:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 1 not checked. [2023-08-27 15:02:18,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129280307] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:02:18,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:02:18,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 4] total 20 [2023-08-27 15:02:18,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697430723] [2023-08-27 15:02:18,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:02:18,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 15:02:18,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:18,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 15:02:18,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=355, Unknown=1, NotChecked=38, Total=462 [2023-08-27 15:02:18,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 15:02:18,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 336 transitions, 4457 flow. Second operand has 22 states, 22 states have (on average 88.63636363636364) internal successors, (1950), 22 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:18,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:18,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 15:02:18,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:19,420 INFO L124 PetriNetUnfolderBase]: 1552/2636 cut-off events. [2023-08-27 15:02:19,421 INFO L125 PetriNetUnfolderBase]: For 24524/24536 co-relation queries the response was YES. [2023-08-27 15:02:19,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19784 conditions, 2636 events. 1552/2636 cut-off events. For 24524/24536 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 14940 event pairs, 131 based on Foata normal form. 10/2480 useless extension candidates. Maximal degree in co-relation 19739. Up to 1934 conditions per place. [2023-08-27 15:02:19,437 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 309 selfloop transitions, 88 changer transitions 0/400 dead transitions. [2023-08-27 15:02:19,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 400 transitions, 6033 flow [2023-08-27 15:02:19,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 15:02:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 15:02:19,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1104 transitions. [2023-08-27 15:02:19,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30976430976430974 [2023-08-27 15:02:19,439 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1104 transitions. [2023-08-27 15:02:19,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1104 transitions. [2023-08-27 15:02:19,440 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:19,440 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1104 transitions. [2023-08-27 15:02:19,441 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 92.0) internal successors, (1104), 12 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:19,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 297.0) internal successors, (3861), 13 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:19,444 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 297.0) internal successors, (3861), 13 states have internal predecessors, (3861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:19,444 INFO L175 Difference]: Start difference. First operand has 122 places, 336 transitions, 4457 flow. Second operand 12 states and 1104 transitions. [2023-08-27 15:02:19,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 400 transitions, 6033 flow [2023-08-27 15:02:19,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 400 transitions, 6032 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 15:02:19,518 INFO L231 Difference]: Finished difference. Result has 133 places, 346 transitions, 4772 flow [2023-08-27 15:02:19,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4772, PETRI_PLACES=133, PETRI_TRANSITIONS=346} [2023-08-27 15:02:19,519 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 100 predicate places. [2023-08-27 15:02:19,519 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 346 transitions, 4772 flow [2023-08-27 15:02:19,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 88.63636363636364) internal successors, (1950), 22 states have internal predecessors, (1950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:19,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:19,520 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:19,529 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 15:02:19,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:19,725 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:19,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:19,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1304297644, now seen corresponding path program 2 times [2023-08-27 15:02:19,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:19,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532478635] [2023-08-27 15:02:19,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:19,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:20,572 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:02:20,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:20,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532478635] [2023-08-27 15:02:20,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532478635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:20,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784941690] [2023-08-27 15:02:20,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:02:20,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:20,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:02:20,577 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:02:20,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-27 15:02:20,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:02:20,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:02:20,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 15:02:20,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:02:20,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:02:20,897 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-27 15:02:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:02:20,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:02:21,127 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:02:21,128 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 79 [2023-08-27 15:02:21,170 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:02:21,170 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 6 [2023-08-27 15:02:21,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:02:21,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784941690] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:02:21,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:02:21,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 23 [2023-08-27 15:02:21,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677546633] [2023-08-27 15:02:21,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:02:21,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 15:02:21,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:21,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 15:02:21,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=516, Unknown=7, NotChecked=0, Total=600 [2023-08-27 15:02:21,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 15:02:21,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 346 transitions, 4772 flow. Second operand has 25 states, 25 states have (on average 88.36) internal successors, (2209), 25 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:21,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:21,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 15:02:21,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:23,876 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:02:24,252 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_~q_front~0 4))) (let ((.cse1 (+ .cse2 c_~q~0.offset))) (and (forall ((v_ArrVal_753 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_753) c_~q~0.base))) (+ c_~s~0 (select .cse0 .cse1) (select .cse0 (+ .cse2 c_~q~0.offset 4)))) 2147483648)) (< (+ c_~s~0 (select (select |c_#memory_int| c_~q~0.base) .cse1)) 2147483648)))) is different from false [2023-08-27 15:02:26,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:02:28,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:02:30,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:02:30,908 INFO L124 PetriNetUnfolderBase]: 1936/3243 cut-off events. [2023-08-27 15:02:30,909 INFO L125 PetriNetUnfolderBase]: For 33957/33972 co-relation queries the response was YES. [2023-08-27 15:02:30,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24774 conditions, 3243 events. 1936/3243 cut-off events. For 33957/33972 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 18763 event pairs, 79 based on Foata normal form. 129/3153 useless extension candidates. Maximal degree in co-relation 24727. Up to 1755 conditions per place. [2023-08-27 15:02:30,928 INFO L140 encePairwiseOnDemand]: 286/297 looper letters, 331 selfloop transitions, 186 changer transitions 20/540 dead transitions. [2023-08-27 15:02:30,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 540 transitions, 8292 flow [2023-08-27 15:02:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 15:02:30,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 15:02:30,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1955 transitions. [2023-08-27 15:02:30,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3134519801186468 [2023-08-27 15:02:30,932 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1955 transitions. [2023-08-27 15:02:30,932 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1955 transitions. [2023-08-27 15:02:30,932 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:30,932 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1955 transitions. [2023-08-27 15:02:30,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 93.0952380952381) internal successors, (1955), 21 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:30,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 297.0) internal successors, (6534), 22 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:30,940 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 297.0) internal successors, (6534), 22 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:30,940 INFO L175 Difference]: Start difference. First operand has 133 places, 346 transitions, 4772 flow. Second operand 21 states and 1955 transitions. [2023-08-27 15:02:30,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 540 transitions, 8292 flow [2023-08-27 15:02:31,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 540 transitions, 8060 flow, removed 8 selfloop flow, removed 7 redundant places. [2023-08-27 15:02:31,023 INFO L231 Difference]: Finished difference. Result has 152 places, 397 transitions, 5874 flow [2023-08-27 15:02:31,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=4523, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=5874, PETRI_PLACES=152, PETRI_TRANSITIONS=397} [2023-08-27 15:02:31,023 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 119 predicate places. [2023-08-27 15:02:31,024 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 397 transitions, 5874 flow [2023-08-27 15:02:31,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 88.36) internal successors, (2209), 25 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:31,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:31,024 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:31,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-27 15:02:31,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:31,231 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:31,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:31,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1806506858, now seen corresponding path program 1 times [2023-08-27 15:02:31,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:31,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246231138] [2023-08-27 15:02:31,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:31,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:31,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:31,316 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:02:31,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:31,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246231138] [2023-08-27 15:02:31,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246231138] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:31,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870320289] [2023-08-27 15:02:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:31,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:31,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:02:31,321 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:02:31,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-27 15:02:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:31,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 15:02:31,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:02:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:02:31,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:02:31,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:02:31,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870320289] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:02:31,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:02:31,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 5] total 9 [2023-08-27 15:02:31,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823260255] [2023-08-27 15:02:31,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:02:31,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 15:02:31,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:31,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 15:02:31,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-08-27 15:02:31,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 297 [2023-08-27 15:02:31,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 397 transitions, 5874 flow. Second operand has 11 states, 11 states have (on average 122.18181818181819) internal successors, (1344), 11 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:31,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:31,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 297 [2023-08-27 15:02:31,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:32,519 INFO L124 PetriNetUnfolderBase]: 2480/4169 cut-off events. [2023-08-27 15:02:32,519 INFO L125 PetriNetUnfolderBase]: For 53577/53592 co-relation queries the response was YES. [2023-08-27 15:02:32,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34420 conditions, 4169 events. 2480/4169 cut-off events. For 53577/53592 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 25272 event pairs, 172 based on Foata normal form. 69/3974 useless extension candidates. Maximal degree in co-relation 34367. Up to 2144 conditions per place. [2023-08-27 15:02:32,555 INFO L140 encePairwiseOnDemand]: 290/297 looper letters, 242 selfloop transitions, 351 changer transitions 3/599 dead transitions. [2023-08-27 15:02:32,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 599 transitions, 9997 flow [2023-08-27 15:02:32,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 15:02:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 15:02:32,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 656 transitions. [2023-08-27 15:02:32,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417508417508417 [2023-08-27 15:02:32,556 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 656 transitions. [2023-08-27 15:02:32,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 656 transitions. [2023-08-27 15:02:32,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:32,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 656 transitions. [2023-08-27 15:02:32,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:32,558 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 297.0) internal successors, (1782), 6 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:32,558 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 297.0) internal successors, (1782), 6 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:32,558 INFO L175 Difference]: Start difference. First operand has 152 places, 397 transitions, 5874 flow. Second operand 5 states and 656 transitions. [2023-08-27 15:02:32,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 599 transitions, 9997 flow [2023-08-27 15:02:32,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 599 transitions, 9440 flow, removed 256 selfloop flow, removed 6 redundant places. [2023-08-27 15:02:32,718 INFO L231 Difference]: Finished difference. Result has 153 places, 565 transitions, 9583 flow [2023-08-27 15:02:32,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=5417, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=9583, PETRI_PLACES=153, PETRI_TRANSITIONS=565} [2023-08-27 15:02:32,719 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 120 predicate places. [2023-08-27 15:02:32,719 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 565 transitions, 9583 flow [2023-08-27 15:02:32,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 122.18181818181819) internal successors, (1344), 11 states have internal predecessors, (1344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:32,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:32,720 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:32,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-27 15:02:32,928 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,SelfDestructingSolverStorable26 [2023-08-27 15:02:32,928 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:32,929 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:32,929 INFO L85 PathProgramCache]: Analyzing trace with hash -356361279, now seen corresponding path program 2 times [2023-08-27 15:02:32,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:32,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681271829] [2023-08-27 15:02:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:32,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:32,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:33,355 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 15:02:33,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:33,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681271829] [2023-08-27 15:02:33,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681271829] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:33,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850968475] [2023-08-27 15:02:33,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:02:33,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:33,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:02:33,357 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:02:33,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-27 15:02:33,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:02:33,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:02:33,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 15:02:33,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:02:33,505 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:02:33,539 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:02:33,568 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:02:33,696 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 15:02:33,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:02:34,023 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:02:34,023 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 63 treesize of output 51 [2023-08-27 15:02:34,036 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:02:34,036 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 324 treesize of output 295 [2023-08-27 15:02:34,046 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:02:34,046 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 84 [2023-08-27 15:02:34,056 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-27 15:02:34,057 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 71 [2023-08-27 15:02:34,162 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 15:02:34,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850968475] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:02:34,163 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:02:34,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-27 15:02:34,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397593316] [2023-08-27 15:02:34,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:02:34,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 15:02:34,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:34,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 15:02:34,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=489, Unknown=1, NotChecked=0, Total=600 [2023-08-27 15:02:34,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:02:34,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 565 transitions, 9583 flow. Second operand has 25 states, 25 states have (on average 85.32) internal successors, (2133), 25 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:34,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:34,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:02:34,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:35,838 INFO L124 PetriNetUnfolderBase]: 1768/3211 cut-off events. [2023-08-27 15:02:35,838 INFO L125 PetriNetUnfolderBase]: For 53983/53998 co-relation queries the response was YES. [2023-08-27 15:02:35,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29846 conditions, 3211 events. 1768/3211 cut-off events. For 53983/53998 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 20606 event pairs, 371 based on Foata normal form. 291/3324 useless extension candidates. Maximal degree in co-relation 29790. Up to 1943 conditions per place. [2023-08-27 15:02:35,904 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 295 selfloop transitions, 203 changer transitions 6/507 dead transitions. [2023-08-27 15:02:35,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 507 transitions, 9593 flow [2023-08-27 15:02:35,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 15:02:35,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 15:02:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1904 transitions. [2023-08-27 15:02:35,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3052749719416386 [2023-08-27 15:02:35,906 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1904 transitions. [2023-08-27 15:02:35,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1904 transitions. [2023-08-27 15:02:35,907 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:35,907 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1904 transitions. [2023-08-27 15:02:35,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 90.66666666666667) internal successors, (1904), 21 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:35,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 297.0) internal successors, (6534), 22 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:35,913 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 297.0) internal successors, (6534), 22 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:35,913 INFO L175 Difference]: Start difference. First operand has 153 places, 565 transitions, 9583 flow. Second operand 21 states and 1904 transitions. [2023-08-27 15:02:35,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 507 transitions, 9593 flow [2023-08-27 15:02:36,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 507 transitions, 8837 flow, removed 307 selfloop flow, removed 3 redundant places. [2023-08-27 15:02:36,088 INFO L231 Difference]: Finished difference. Result has 175 places, 435 transitions, 7826 flow [2023-08-27 15:02:36,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=5989, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7826, PETRI_PLACES=175, PETRI_TRANSITIONS=435} [2023-08-27 15:02:36,089 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 142 predicate places. [2023-08-27 15:02:36,089 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 435 transitions, 7826 flow [2023-08-27 15:02:36,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 85.32) internal successors, (2133), 25 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:36,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:36,090 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:36,094 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 15:02:36,290 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,SelfDestructingSolverStorable27 [2023-08-27 15:02:36,290 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:36,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:36,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1198946957, now seen corresponding path program 3 times [2023-08-27 15:02:36,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:36,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926806287] [2023-08-27 15:02:36,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:36,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:37,060 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 15:02:37,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:37,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926806287] [2023-08-27 15:02:37,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926806287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:37,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707882205] [2023-08-27 15:02:37,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:02:37,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:37,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:02:37,061 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:02:37,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-27 15:02:37,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 15:02:37,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:02:37,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 15:02:37,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:02:37,226 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 15:02:37,263 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:02:37,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:02:37,374 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 15:02:37,462 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 15:02:37,463 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:02:37,739 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:02:37,740 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 49 [2023-08-27 15:02:37,747 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:02:37,748 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 204 treesize of output 185 [2023-08-27 15:02:37,756 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:02:37,757 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 52 [2023-08-27 15:02:37,805 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 34 treesize of output 20 [2023-08-27 15:02:37,879 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 15:02:37,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707882205] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:02:37,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:02:37,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2023-08-27 15:02:37,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69978615] [2023-08-27 15:02:37,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:02:37,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 15:02:37,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:37,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 15:02:37,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=539, Unknown=5, NotChecked=0, Total=650 [2023-08-27 15:02:37,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:02:37,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 435 transitions, 7826 flow. Second operand has 26 states, 26 states have (on average 85.26923076923077) internal successors, (2217), 26 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:37,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:37,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:02:37,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:40,725 INFO L124 PetriNetUnfolderBase]: 2100/3812 cut-off events. [2023-08-27 15:02:40,725 INFO L125 PetriNetUnfolderBase]: For 60903/60918 co-relation queries the response was YES. [2023-08-27 15:02:40,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34476 conditions, 3812 events. 2100/3812 cut-off events. For 60903/60918 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 25268 event pairs, 176 based on Foata normal form. 47/3607 useless extension candidates. Maximal degree in co-relation 34416. Up to 2161 conditions per place. [2023-08-27 15:02:40,755 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 358 selfloop transitions, 295 changer transitions 1/657 dead transitions. [2023-08-27 15:02:40,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 657 transitions, 12727 flow [2023-08-27 15:02:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-27 15:02:40,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-27 15:02:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2699 transitions. [2023-08-27 15:02:40,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30291806958473627 [2023-08-27 15:02:40,758 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2699 transitions. [2023-08-27 15:02:40,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2699 transitions. [2023-08-27 15:02:40,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:40,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2699 transitions. [2023-08-27 15:02:40,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 89.96666666666667) internal successors, (2699), 30 states have internal predecessors, (2699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:40,766 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 297.0) internal successors, (9207), 31 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:40,767 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 297.0) internal successors, (9207), 31 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:40,767 INFO L175 Difference]: Start difference. First operand has 175 places, 435 transitions, 7826 flow. Second operand 30 states and 2699 transitions. [2023-08-27 15:02:40,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 657 transitions, 12727 flow [2023-08-27 15:02:40,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 657 transitions, 11730 flow, removed 459 selfloop flow, removed 9 redundant places. [2023-08-27 15:02:40,974 INFO L231 Difference]: Finished difference. Result has 204 places, 550 transitions, 10304 flow [2023-08-27 15:02:40,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=7234, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=10304, PETRI_PLACES=204, PETRI_TRANSITIONS=550} [2023-08-27 15:02:40,975 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 171 predicate places. [2023-08-27 15:02:40,975 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 550 transitions, 10304 flow [2023-08-27 15:02:40,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 85.26923076923077) internal successors, (2217), 26 states have internal predecessors, (2217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:40,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:40,975 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:40,980 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 15:02:41,176 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,SelfDestructingSolverStorable28 [2023-08-27 15:02:41,177 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:41,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:41,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1309175805, now seen corresponding path program 2 times [2023-08-27 15:02:41,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:41,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214668193] [2023-08-27 15:02:41,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:41,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:02:41,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:41,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214668193] [2023-08-27 15:02:41,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214668193] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:41,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283109160] [2023-08-27 15:02:41,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:02:41,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:41,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:02:41,918 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:02:41,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-27 15:02:42,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:02:42,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:02:42,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 15:02:42,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:02:42,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:02:42,193 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 15:02:42,239 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:02:42,239 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:02:42,289 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_906 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_906) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 4)) 1))) is different from false [2023-08-27 15:02:42,298 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:02:42,299 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2023-08-27 15:02:42,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2023-08-27 15:02:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:02:42,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283109160] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:02:42,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:02:42,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 25 [2023-08-27 15:02:42,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230959016] [2023-08-27 15:02:42,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:02:42,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 15:02:42,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:42,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 15:02:42,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=576, Unknown=1, NotChecked=48, Total=702 [2023-08-27 15:02:42,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 15:02:42,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 550 transitions, 10304 flow. Second operand has 27 states, 27 states have (on average 88.33333333333333) internal successors, (2385), 27 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:42,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:42,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 15:02:42,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:44,077 INFO L124 PetriNetUnfolderBase]: 2098/3826 cut-off events. [2023-08-27 15:02:44,077 INFO L125 PetriNetUnfolderBase]: For 56016/56031 co-relation queries the response was YES. [2023-08-27 15:02:44,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34462 conditions, 3826 events. 2098/3826 cut-off events. For 56016/56031 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25473 event pairs, 127 based on Foata normal form. 9/3599 useless extension candidates. Maximal degree in co-relation 34394. Up to 2212 conditions per place. [2023-08-27 15:02:44,106 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 411 selfloop transitions, 242 changer transitions 0/656 dead transitions. [2023-08-27 15:02:44,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 656 transitions, 12795 flow [2023-08-27 15:02:44,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 15:02:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 15:02:44,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1684 transitions. [2023-08-27 15:02:44,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3150018705574261 [2023-08-27 15:02:44,108 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1684 transitions. [2023-08-27 15:02:44,108 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1684 transitions. [2023-08-27 15:02:44,109 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:44,109 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1684 transitions. [2023-08-27 15:02:44,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 93.55555555555556) internal successors, (1684), 18 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:44,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 297.0) internal successors, (5643), 19 states have internal predecessors, (5643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:44,115 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 297.0) internal successors, (5643), 19 states have internal predecessors, (5643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:44,115 INFO L175 Difference]: Start difference. First operand has 204 places, 550 transitions, 10304 flow. Second operand 18 states and 1684 transitions. [2023-08-27 15:02:44,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 656 transitions, 12795 flow [2023-08-27 15:02:44,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 656 transitions, 11908 flow, removed 409 selfloop flow, removed 7 redundant places. [2023-08-27 15:02:44,337 INFO L231 Difference]: Finished difference. Result has 214 places, 558 transitions, 10052 flow [2023-08-27 15:02:44,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=9401, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=10052, PETRI_PLACES=214, PETRI_TRANSITIONS=558} [2023-08-27 15:02:44,338 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 181 predicate places. [2023-08-27 15:02:44,338 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 558 transitions, 10052 flow [2023-08-27 15:02:44,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 88.33333333333333) internal successors, (2385), 27 states have internal predecessors, (2385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:44,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:44,339 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:44,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-27 15:02:44,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:44,540 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:44,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:44,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1725936441, now seen corresponding path program 4 times [2023-08-27 15:02:44,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:44,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658210607] [2023-08-27 15:02:44,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:44,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:44,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:02:45,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:45,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658210607] [2023-08-27 15:02:45,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658210607] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:45,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826806936] [2023-08-27 15:02:45,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:02:45,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:45,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:02:45,175 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:02:45,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-27 15:02:45,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:02:45,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:02:45,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 15:02:45,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:02:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:02:45,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:02:45,391 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:02:45,392 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-27 15:02:45,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:02:45,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826806936] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:02:45,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:02:45,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 4] total 16 [2023-08-27 15:02:45,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577474669] [2023-08-27 15:02:45,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:02:45,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 15:02:45,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:45,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 15:02:45,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-08-27 15:02:45,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 297 [2023-08-27 15:02:45,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 558 transitions, 10052 flow. Second operand has 18 states, 18 states have (on average 92.55555555555556) internal successors, (1666), 18 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:45,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:45,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 297 [2023-08-27 15:02:45,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:46,547 INFO L124 PetriNetUnfolderBase]: 2073/3763 cut-off events. [2023-08-27 15:02:46,547 INFO L125 PetriNetUnfolderBase]: For 54653/54659 co-relation queries the response was YES. [2023-08-27 15:02:46,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32953 conditions, 3763 events. 2073/3763 cut-off events. For 54653/54659 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24840 event pairs, 150 based on Foata normal form. 52/3651 useless extension candidates. Maximal degree in co-relation 32884. Up to 2777 conditions per place. [2023-08-27 15:02:46,579 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 427 selfloop transitions, 222 changer transitions 2/654 dead transitions. [2023-08-27 15:02:46,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 654 transitions, 12546 flow [2023-08-27 15:02:46,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 15:02:46,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 15:02:46,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1650 transitions. [2023-08-27 15:02:46,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32679738562091504 [2023-08-27 15:02:46,581 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1650 transitions. [2023-08-27 15:02:46,581 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1650 transitions. [2023-08-27 15:02:46,581 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:46,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1650 transitions. [2023-08-27 15:02:46,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 97.05882352941177) internal successors, (1650), 17 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:46,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 297.0) internal successors, (5346), 18 states have internal predecessors, (5346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:46,587 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 297.0) internal successors, (5346), 18 states have internal predecessors, (5346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:46,587 INFO L175 Difference]: Start difference. First operand has 214 places, 558 transitions, 10052 flow. Second operand 17 states and 1650 transitions. [2023-08-27 15:02:46,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 654 transitions, 12546 flow [2023-08-27 15:02:46,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 654 transitions, 12345 flow, removed 12 selfloop flow, removed 9 redundant places. [2023-08-27 15:02:46,828 INFO L231 Difference]: Finished difference. Result has 221 places, 582 transitions, 10695 flow [2023-08-27 15:02:46,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=9618, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=10695, PETRI_PLACES=221, PETRI_TRANSITIONS=582} [2023-08-27 15:02:46,829 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 188 predicate places. [2023-08-27 15:02:46,829 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 582 transitions, 10695 flow [2023-08-27 15:02:46,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 92.55555555555556) internal successors, (1666), 18 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:46,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:46,829 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:46,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-27 15:02:47,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:47,033 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:47,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:47,033 INFO L85 PathProgramCache]: Analyzing trace with hash 767607301, now seen corresponding path program 2 times [2023-08-27 15:02:47,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:47,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965168863] [2023-08-27 15:02:47,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:47,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:47,735 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 15:02:47,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:47,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965168863] [2023-08-27 15:02:47,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965168863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:47,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087234231] [2023-08-27 15:02:47,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:02:47,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:47,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:02:47,737 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:02:47,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-27 15:02:47,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:02:47,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:02:47,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 15:02:47,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:02:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 15:02:47,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:02:48,023 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:02:48,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-27 15:02:48,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 15:02:48,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087234231] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:02:48,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:02:48,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 4] total 18 [2023-08-27 15:02:48,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987179508] [2023-08-27 15:02:48,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:02:48,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 15:02:48,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:48,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 15:02:48,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2023-08-27 15:02:48,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 297 [2023-08-27 15:02:48,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 582 transitions, 10695 flow. Second operand has 20 states, 20 states have (on average 92.55) internal successors, (1851), 20 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:48,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:48,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 297 [2023-08-27 15:02:48,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:50,222 INFO L124 PetriNetUnfolderBase]: 2634/4706 cut-off events. [2023-08-27 15:02:50,223 INFO L125 PetriNetUnfolderBase]: For 66152/66158 co-relation queries the response was YES. [2023-08-27 15:02:50,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41423 conditions, 4706 events. 2634/4706 cut-off events. For 66152/66158 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32096 event pairs, 238 based on Foata normal form. 102/4598 useless extension candidates. Maximal degree in co-relation 41354. Up to 2399 conditions per place. [2023-08-27 15:02:50,261 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 481 selfloop transitions, 344 changer transitions 9/837 dead transitions. [2023-08-27 15:02:50,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 837 transitions, 15775 flow [2023-08-27 15:02:50,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 15:02:50,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 15:02:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2817 transitions. [2023-08-27 15:02:50,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3270637408568443 [2023-08-27 15:02:50,264 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2817 transitions. [2023-08-27 15:02:50,264 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2817 transitions. [2023-08-27 15:02:50,265 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:50,265 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2817 transitions. [2023-08-27 15:02:50,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 97.13793103448276) internal successors, (2817), 29 states have internal predecessors, (2817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:50,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 297.0) internal successors, (8910), 30 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:50,275 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 297.0) internal successors, (8910), 30 states have internal predecessors, (8910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:50,275 INFO L175 Difference]: Start difference. First operand has 221 places, 582 transitions, 10695 flow. Second operand 29 states and 2817 transitions. [2023-08-27 15:02:50,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 837 transitions, 15775 flow [2023-08-27 15:02:50,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 837 transitions, 15388 flow, removed 154 selfloop flow, removed 6 redundant places. [2023-08-27 15:02:50,550 INFO L231 Difference]: Finished difference. Result has 251 places, 689 transitions, 13231 flow [2023-08-27 15:02:50,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=10200, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=13231, PETRI_PLACES=251, PETRI_TRANSITIONS=689} [2023-08-27 15:02:50,551 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 218 predicate places. [2023-08-27 15:02:50,551 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 689 transitions, 13231 flow [2023-08-27 15:02:50,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 92.55) internal successors, (1851), 20 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:50,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:50,552 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:50,557 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 15:02:50,752 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,SelfDestructingSolverStorable31 [2023-08-27 15:02:50,753 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:50,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:50,753 INFO L85 PathProgramCache]: Analyzing trace with hash 167140095, now seen corresponding path program 3 times [2023-08-27 15:02:50,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:50,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705912271] [2023-08-27 15:02:50,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:50,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:50,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:50,867 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 15:02:50,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:50,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705912271] [2023-08-27 15:02:50,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705912271] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:50,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69566972] [2023-08-27 15:02:50,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:02:50,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:50,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:02:50,873 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:02:50,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-27 15:02:51,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 15:02:51,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:02:51,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 15:02:51,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:02:51,080 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 15:02:51,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:02:51,156 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 15:02:51,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69566972] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:02:51,157 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:02:51,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-27 15:02:51,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731180782] [2023-08-27 15:02:51,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:02:51,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 15:02:51,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:51,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 15:02:51,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-27 15:02:51,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 297 [2023-08-27 15:02:51,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 689 transitions, 13231 flow. Second operand has 18 states, 18 states have (on average 111.55555555555556) internal successors, (2008), 18 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:51,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:51,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 297 [2023-08-27 15:02:51,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:51,914 INFO L124 PetriNetUnfolderBase]: 1887/3255 cut-off events. [2023-08-27 15:02:51,914 INFO L125 PetriNetUnfolderBase]: For 55193/55199 co-relation queries the response was YES. [2023-08-27 15:02:51,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31004 conditions, 3255 events. 1887/3255 cut-off events. For 55193/55199 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 19222 event pairs, 563 based on Foata normal form. 33/3204 useless extension candidates. Maximal degree in co-relation 30935. Up to 2948 conditions per place. [2023-08-27 15:02:51,944 INFO L140 encePairwiseOnDemand]: 292/297 looper letters, 420 selfloop transitions, 19 changer transitions 19/461 dead transitions. [2023-08-27 15:02:51,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 461 transitions, 9646 flow [2023-08-27 15:02:51,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 15:02:51,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 15:02:51,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 930 transitions. [2023-08-27 15:02:51,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39141414141414144 [2023-08-27 15:02:51,946 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 930 transitions. [2023-08-27 15:02:51,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 930 transitions. [2023-08-27 15:02:51,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:51,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 930 transitions. [2023-08-27 15:02:51,948 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 116.25) internal successors, (930), 8 states have internal predecessors, (930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:51,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 297.0) internal successors, (2673), 9 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:51,949 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 297.0) internal successors, (2673), 9 states have internal predecessors, (2673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:51,949 INFO L175 Difference]: Start difference. First operand has 251 places, 689 transitions, 13231 flow. Second operand 8 states and 930 transitions. [2023-08-27 15:02:51,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 461 transitions, 9646 flow [2023-08-27 15:02:52,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 461 transitions, 8623 flow, removed 236 selfloop flow, removed 20 redundant places. [2023-08-27 15:02:52,187 INFO L231 Difference]: Finished difference. Result has 228 places, 422 transitions, 7206 flow [2023-08-27 15:02:52,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=7583, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7206, PETRI_PLACES=228, PETRI_TRANSITIONS=422} [2023-08-27 15:02:52,188 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 195 predicate places. [2023-08-27 15:02:52,188 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 422 transitions, 7206 flow [2023-08-27 15:02:52,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 111.55555555555556) internal successors, (2008), 18 states have internal predecessors, (2008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:52,188 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:52,188 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:52,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-27 15:02:52,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-08-27 15:02:52,389 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:52,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:52,389 INFO L85 PathProgramCache]: Analyzing trace with hash -277731973, now seen corresponding path program 1 times [2023-08-27 15:02:52,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:52,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827081689] [2023-08-27 15:02:52,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:52,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:02:52,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:52,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827081689] [2023-08-27 15:02:52,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827081689] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 15:02:52,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 15:02:52,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 15:02:52,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053829824] [2023-08-27 15:02:52,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 15:02:52,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 15:02:52,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:52,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 15:02:52,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-08-27 15:02:52,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 297 [2023-08-27 15:02:52,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 422 transitions, 7206 flow. Second operand has 7 states, 7 states have (on average 113.0) internal successors, (791), 7 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:52,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:52,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 297 [2023-08-27 15:02:52,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:53,103 INFO L124 PetriNetUnfolderBase]: 1884/3243 cut-off events. [2023-08-27 15:02:53,103 INFO L125 PetriNetUnfolderBase]: For 43299/43299 co-relation queries the response was YES. [2023-08-27 15:02:53,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27958 conditions, 3243 events. 1884/3243 cut-off events. For 43299/43299 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 19197 event pairs, 185 based on Foata normal form. 3/3154 useless extension candidates. Maximal degree in co-relation 27896. Up to 2385 conditions per place. [2023-08-27 15:02:53,131 INFO L140 encePairwiseOnDemand]: 290/297 looper letters, 341 selfloop transitions, 67 changer transitions 38/447 dead transitions. [2023-08-27 15:02:53,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 447 transitions, 8332 flow [2023-08-27 15:02:53,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 15:02:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 15:02:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 703 transitions. [2023-08-27 15:02:53,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945005611672278 [2023-08-27 15:02:53,132 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 703 transitions. [2023-08-27 15:02:53,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 703 transitions. [2023-08-27 15:02:53,132 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:53,132 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 703 transitions. [2023-08-27 15:02:53,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 117.16666666666667) internal successors, (703), 6 states have internal predecessors, (703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:53,134 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:53,134 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:53,134 INFO L175 Difference]: Start difference. First operand has 228 places, 422 transitions, 7206 flow. Second operand 6 states and 703 transitions. [2023-08-27 15:02:53,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 447 transitions, 8332 flow [2023-08-27 15:02:53,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 447 transitions, 8141 flow, removed 59 selfloop flow, removed 13 redundant places. [2023-08-27 15:02:53,299 INFO L231 Difference]: Finished difference. Result has 215 places, 393 transitions, 6541 flow [2023-08-27 15:02:53,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=7015, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6541, PETRI_PLACES=215, PETRI_TRANSITIONS=393} [2023-08-27 15:02:53,300 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 182 predicate places. [2023-08-27 15:02:53,300 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 393 transitions, 6541 flow [2023-08-27 15:02:53,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 113.0) internal successors, (791), 7 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:53,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:02:53,300 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:02:53,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2023-08-27 15:02:53,300 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:02:53,300 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:02:53,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1130097802, now seen corresponding path program 5 times [2023-08-27 15:02:53,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:02:53,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419270755] [2023-08-27 15:02:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:02:53,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:02:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:02:54,135 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 15:02:54,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:02:54,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419270755] [2023-08-27 15:02:54,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419270755] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:02:54,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149883502] [2023-08-27 15:02:54,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:02:54,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:02:54,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:02:54,136 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:02:54,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-27 15:02:54,245 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 15:02:54,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:02:54,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 15:02:54,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:02:54,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:02:54,420 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:02:54,627 INFO L322 Elim1Store]: treesize reduction 15, result has 61.5 percent of original size [2023-08-27 15:02:54,627 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 105 treesize of output 57 [2023-08-27 15:02:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:02:54,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149883502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:02:54,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:02:54,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 23 [2023-08-27 15:02:54,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060814998] [2023-08-27 15:02:54,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:02:54,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 15:02:54,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:02:54,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 15:02:54,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2023-08-27 15:02:54,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:02:54,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 393 transitions, 6541 flow. Second operand has 25 states, 25 states have (on average 85.4) internal successors, (2135), 25 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:54,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:02:54,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:02:54,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:02:59,802 INFO L124 PetriNetUnfolderBase]: 3309/5746 cut-off events. [2023-08-27 15:02:59,803 INFO L125 PetriNetUnfolderBase]: For 89581/89583 co-relation queries the response was YES. [2023-08-27 15:02:59,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50663 conditions, 5746 events. 3309/5746 cut-off events. For 89581/89583 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 38597 event pairs, 133 based on Foata normal form. 308/5836 useless extension candidates. Maximal degree in co-relation 50605. Up to 3045 conditions per place. [2023-08-27 15:02:59,853 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 418 selfloop transitions, 608 changer transitions 43/1071 dead transitions. [2023-08-27 15:02:59,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 1071 transitions, 18852 flow [2023-08-27 15:02:59,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-27 15:02:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-27 15:02:59,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 6457 transitions. [2023-08-27 15:02:59,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.306207616066771 [2023-08-27 15:02:59,859 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 6457 transitions. [2023-08-27 15:02:59,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 6457 transitions. [2023-08-27 15:02:59,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:02:59,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 6457 transitions. [2023-08-27 15:02:59,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 90.94366197183099) internal successors, (6457), 71 states have internal predecessors, (6457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:59,881 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 297.0) internal successors, (21384), 72 states have internal predecessors, (21384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:59,883 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 297.0) internal successors, (21384), 72 states have internal predecessors, (21384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:02:59,883 INFO L175 Difference]: Start difference. First operand has 215 places, 393 transitions, 6541 flow. Second operand 71 states and 6457 transitions. [2023-08-27 15:02:59,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 1071 transitions, 18852 flow [2023-08-27 15:03:00,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 1071 transitions, 18455 flow, removed 26 selfloop flow, removed 8 redundant places. [2023-08-27 15:03:00,332 INFO L231 Difference]: Finished difference. Result has 300 places, 815 transitions, 16338 flow [2023-08-27 15:03:00,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=6273, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=16338, PETRI_PLACES=300, PETRI_TRANSITIONS=815} [2023-08-27 15:03:00,333 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 267 predicate places. [2023-08-27 15:03:00,333 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 815 transitions, 16338 flow [2023-08-27 15:03:00,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 85.4) internal successors, (2135), 25 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:00,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:03:00,333 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:03:00,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-27 15:03:00,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-27 15:03:00,534 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:03:00,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:03:00,534 INFO L85 PathProgramCache]: Analyzing trace with hash -700390244, now seen corresponding path program 6 times [2023-08-27 15:03:00,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:03:00,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820906060] [2023-08-27 15:03:00,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:03:00,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:03:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:03:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:03:01,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:03:01,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820906060] [2023-08-27 15:03:01,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820906060] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:03:01,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809608639] [2023-08-27 15:03:01,176 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:03:01,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:03:01,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:03:01,178 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:03:01,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-27 15:03:01,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 15:03:01,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:03:01,289 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 15:03:01,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:03:01,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-27 15:03:01,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:03:01,454 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:03:01,455 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-08-27 15:03:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 15:03:01,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809608639] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:03:01,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:03:01,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 5] total 20 [2023-08-27 15:03:01,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222516730] [2023-08-27 15:03:01,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:03:01,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 15:03:01,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:03:01,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 15:03:01,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2023-08-27 15:03:01,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:03:01,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 815 transitions, 16338 flow. Second operand has 22 states, 22 states have (on average 85.45454545454545) internal successors, (1880), 22 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:01,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:03:01,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:03:01,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:03:05,097 INFO L124 PetriNetUnfolderBase]: 3793/6740 cut-off events. [2023-08-27 15:03:05,098 INFO L125 PetriNetUnfolderBase]: For 129556/129558 co-relation queries the response was YES. [2023-08-27 15:03:05,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66348 conditions, 6740 events. 3793/6740 cut-off events. For 129556/129558 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 48037 event pairs, 87 based on Foata normal form. 212/6832 useless extension candidates. Maximal degree in co-relation 66254. Up to 3641 conditions per place. [2023-08-27 15:03:05,169 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 359 selfloop transitions, 816 changer transitions 19/1196 dead transitions. [2023-08-27 15:03:05,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 1196 transitions, 25419 flow [2023-08-27 15:03:05,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-27 15:03:05,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-27 15:03:05,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3640 transitions. [2023-08-27 15:03:05,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3063973063973064 [2023-08-27 15:03:05,174 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3640 transitions. [2023-08-27 15:03:05,174 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3640 transitions. [2023-08-27 15:03:05,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:03:05,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3640 transitions. [2023-08-27 15:03:05,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 91.0) internal successors, (3640), 40 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:05,185 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 297.0) internal successors, (12177), 41 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:05,186 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 297.0) internal successors, (12177), 41 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:05,186 INFO L175 Difference]: Start difference. First operand has 300 places, 815 transitions, 16338 flow. Second operand 40 states and 3640 transitions. [2023-08-27 15:03:05,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 1196 transitions, 25419 flow [2023-08-27 15:03:06,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 1196 transitions, 21474 flow, removed 1857 selfloop flow, removed 18 redundant places. [2023-08-27 15:03:06,656 INFO L231 Difference]: Finished difference. Result has 335 places, 1016 transitions, 19397 flow [2023-08-27 15:03:06,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=13109, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=791, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=605, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=19397, PETRI_PLACES=335, PETRI_TRANSITIONS=1016} [2023-08-27 15:03:06,658 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 302 predicate places. [2023-08-27 15:03:06,658 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 1016 transitions, 19397 flow [2023-08-27 15:03:06,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 85.45454545454545) internal successors, (1880), 22 states have internal predecessors, (1880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:06,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:03:06,658 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:03:06,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-27 15:03:06,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:03:06,864 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:03:06,865 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:03:06,865 INFO L85 PathProgramCache]: Analyzing trace with hash -700399803, now seen corresponding path program 3 times [2023-08-27 15:03:06,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:03:06,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502223249] [2023-08-27 15:03:06,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:03:06,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:03:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:03:07,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:03:07,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:03:07,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502223249] [2023-08-27 15:03:07,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502223249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:03:07,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071802254] [2023-08-27 15:03:07,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:03:07,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:03:07,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:03:07,784 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:03:07,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-27 15:03:08,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 15:03:08,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:03:08,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 15:03:08,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:03:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 15:03:08,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:03:08,139 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:03:08,139 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-27 15:03:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-27 15:03:08,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071802254] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:03:08,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:03:08,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 18 [2023-08-27 15:03:08,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955405578] [2023-08-27 15:03:08,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:03:08,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 15:03:08,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:03:08,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 15:03:08,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2023-08-27 15:03:08,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:03:08,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 1016 transitions, 19397 flow. Second operand has 20 states, 20 states have (on average 85.45) internal successors, (1709), 20 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:08,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:03:08,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:03:08,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:03:11,296 INFO L124 PetriNetUnfolderBase]: 3743/6683 cut-off events. [2023-08-27 15:03:11,296 INFO L125 PetriNetUnfolderBase]: For 103069/103071 co-relation queries the response was YES. [2023-08-27 15:03:11,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62912 conditions, 6683 events. 3743/6683 cut-off events. For 103069/103071 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 47796 event pairs, 120 based on Foata normal form. 56/6661 useless extension candidates. Maximal degree in co-relation 62811. Up to 3625 conditions per place. [2023-08-27 15:03:11,368 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 507 selfloop transitions, 596 changer transitions 0/1105 dead transitions. [2023-08-27 15:03:11,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1105 transitions, 22584 flow [2023-08-27 15:03:11,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 15:03:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 15:03:11,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1985 transitions. [2023-08-27 15:03:11,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30379553106825835 [2023-08-27 15:03:11,371 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1985 transitions. [2023-08-27 15:03:11,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1985 transitions. [2023-08-27 15:03:11,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:03:11,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1985 transitions. [2023-08-27 15:03:11,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 90.22727272727273) internal successors, (1985), 22 states have internal predecessors, (1985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:11,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 297.0) internal successors, (6831), 23 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:11,375 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 297.0) internal successors, (6831), 23 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:11,375 INFO L175 Difference]: Start difference. First operand has 335 places, 1016 transitions, 19397 flow. Second operand 22 states and 1985 transitions. [2023-08-27 15:03:11,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1105 transitions, 22584 flow [2023-08-27 15:03:12,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 1105 transitions, 19933 flow, removed 750 selfloop flow, removed 17 redundant places. [2023-08-27 15:03:12,630 INFO L231 Difference]: Finished difference. Result has 341 places, 1028 transitions, 18304 flow [2023-08-27 15:03:12,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=16701, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=578, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=18304, PETRI_PLACES=341, PETRI_TRANSITIONS=1028} [2023-08-27 15:03:12,631 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 308 predicate places. [2023-08-27 15:03:12,631 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 1028 transitions, 18304 flow [2023-08-27 15:03:12,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 85.45) internal successors, (1709), 20 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:12,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:03:12,631 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:03:12,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-27 15:03:12,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-27 15:03:12,832 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:03:12,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:03:12,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1484933973, now seen corresponding path program 4 times [2023-08-27 15:03:12,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:03:12,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137278940] [2023-08-27 15:03:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:03:12,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:03:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:03:13,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:03:13,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:03:13,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137278940] [2023-08-27 15:03:13,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137278940] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:03:13,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256433595] [2023-08-27 15:03:13,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:03:13,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:03:13,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:03:13,870 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:03:13,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-27 15:03:13,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:03:13,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:03:13,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 15:03:13,987 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:03:14,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:03:14,127 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 15:03:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:03:14,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:03:14,570 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:03:14,570 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 150 treesize of output 182 [2023-08-27 15:03:14,599 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:03:14,600 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 82 treesize of output 104 [2023-08-27 15:03:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:03:15,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256433595] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:03:15,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:03:15,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 29 [2023-08-27 15:03:15,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573710236] [2023-08-27 15:03:15,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:03:15,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 15:03:15,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:03:15,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 15:03:15,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=828, Unknown=3, NotChecked=0, Total=930 [2023-08-27 15:03:15,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 15:03:15,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 1028 transitions, 18304 flow. Second operand has 31 states, 31 states have (on average 88.29032258064517) internal successors, (2737), 31 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:15,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:03:15,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 15:03:15,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:03:24,654 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:03:27,088 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:03:29,263 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:03:32,111 INFO L124 PetriNetUnfolderBase]: 4192/7519 cut-off events. [2023-08-27 15:03:32,111 INFO L125 PetriNetUnfolderBase]: For 106298/106300 co-relation queries the response was YES. [2023-08-27 15:03:32,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66559 conditions, 7519 events. 4192/7519 cut-off events. For 106298/106300 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 54213 event pairs, 138 based on Foata normal form. 479/7920 useless extension candidates. Maximal degree in co-relation 66462. Up to 5487 conditions per place. [2023-08-27 15:03:32,192 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 915 selfloop transitions, 445 changer transitions 4/1366 dead transitions. [2023-08-27 15:03:32,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1366 transitions, 25669 flow [2023-08-27 15:03:32,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-27 15:03:32,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-27 15:03:32,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3887 transitions. [2023-08-27 15:03:32,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31160814494147826 [2023-08-27 15:03:32,198 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3887 transitions. [2023-08-27 15:03:32,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3887 transitions. [2023-08-27 15:03:32,199 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:03:32,199 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3887 transitions. [2023-08-27 15:03:32,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 92.54761904761905) internal successors, (3887), 42 states have internal predecessors, (3887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:32,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 297.0) internal successors, (12771), 43 states have internal predecessors, (12771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:32,210 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 297.0) internal successors, (12771), 43 states have internal predecessors, (12771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:32,210 INFO L175 Difference]: Start difference. First operand has 341 places, 1028 transitions, 18304 flow. Second operand 42 states and 3887 transitions. [2023-08-27 15:03:32,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1366 transitions, 25669 flow [2023-08-27 15:03:33,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 1366 transitions, 24967 flow, removed 54 selfloop flow, removed 13 redundant places. [2023-08-27 15:03:33,218 INFO L231 Difference]: Finished difference. Result has 387 places, 1171 transitions, 21323 flow [2023-08-27 15:03:33,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=16634, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=302, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=21323, PETRI_PLACES=387, PETRI_TRANSITIONS=1171} [2023-08-27 15:03:33,219 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 354 predicate places. [2023-08-27 15:03:33,219 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1171 transitions, 21323 flow [2023-08-27 15:03:33,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 88.29032258064517) internal successors, (2737), 31 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:33,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:03:33,220 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:03:33,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-27 15:03:33,425 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,SelfDestructingSolverStorable37 [2023-08-27 15:03:33,425 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:03:33,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:03:33,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1573064436, now seen corresponding path program 3 times [2023-08-27 15:03:33,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:03:33,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797495224] [2023-08-27 15:03:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:03:33,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:03:33,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:03:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:03:33,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:03:33,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797495224] [2023-08-27 15:03:33,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797495224] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:03:33,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637347914] [2023-08-27 15:03:33,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:03:33,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:03:33,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:03:34,001 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:03:34,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-27 15:03:34,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 15:03:34,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:03:34,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 15:03:34,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:03:34,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:03:34,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:03:34,416 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:03:34,416 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-08-27 15:03:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:03:34,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637347914] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:03:34,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:03:34,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 19 [2023-08-27 15:03:34,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466560350] [2023-08-27 15:03:34,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:03:34,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 15:03:34,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:03:34,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 15:03:34,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2023-08-27 15:03:34,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 297 [2023-08-27 15:03:34,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1171 transitions, 21323 flow. Second operand has 21 states, 21 states have (on average 92.42857142857143) internal successors, (1941), 21 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:34,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:03:34,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 297 [2023-08-27 15:03:34,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:03:38,905 INFO L124 PetriNetUnfolderBase]: 4569/8217 cut-off events. [2023-08-27 15:03:38,905 INFO L125 PetriNetUnfolderBase]: For 130846/130848 co-relation queries the response was YES. [2023-08-27 15:03:38,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75558 conditions, 8217 events. 4569/8217 cut-off events. For 130846/130848 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 60437 event pairs, 105 based on Foata normal form. 74/8215 useless extension candidates. Maximal degree in co-relation 75444. Up to 4262 conditions per place. [2023-08-27 15:03:39,002 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 547 selfloop transitions, 1006 changer transitions 4/1559 dead transitions. [2023-08-27 15:03:39,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 1559 transitions, 30170 flow [2023-08-27 15:03:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-08-27 15:03:39,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-08-27 15:03:39,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4384 transitions. [2023-08-27 15:03:39,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32802095024317246 [2023-08-27 15:03:39,007 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4384 transitions. [2023-08-27 15:03:39,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4384 transitions. [2023-08-27 15:03:39,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:03:39,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4384 transitions. [2023-08-27 15:03:39,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 97.42222222222222) internal successors, (4384), 45 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:39,020 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 297.0) internal successors, (13662), 46 states have internal predecessors, (13662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:39,022 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 297.0) internal successors, (13662), 46 states have internal predecessors, (13662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:39,022 INFO L175 Difference]: Start difference. First operand has 387 places, 1171 transitions, 21323 flow. Second operand 45 states and 4384 transitions. [2023-08-27 15:03:39,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 1559 transitions, 30170 flow [2023-08-27 15:03:40,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 1559 transitions, 29405 flow, removed 245 selfloop flow, removed 19 redundant places. [2023-08-27 15:03:40,453 INFO L231 Difference]: Finished difference. Result has 417 places, 1330 transitions, 25908 flow [2023-08-27 15:03:40,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=20536, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=855, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=25908, PETRI_PLACES=417, PETRI_TRANSITIONS=1330} [2023-08-27 15:03:40,454 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 384 predicate places. [2023-08-27 15:03:40,455 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 1330 transitions, 25908 flow [2023-08-27 15:03:40,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 92.42857142857143) internal successors, (1941), 21 states have internal predecessors, (1941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:40,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:03:40,455 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:03:40,460 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 15:03:40,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-27 15:03:40,656 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:03:40,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:03:40,656 INFO L85 PathProgramCache]: Analyzing trace with hash -576373143, now seen corresponding path program 4 times [2023-08-27 15:03:40,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:03:40,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178249848] [2023-08-27 15:03:40,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:03:40,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:03:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:03:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:03:41,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:03:41,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178249848] [2023-08-27 15:03:41,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178249848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:03:41,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126091753] [2023-08-27 15:03:41,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:03:41,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:03:41,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:03:41,478 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:03:41,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-27 15:03:41,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:03:41,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:03:41,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 15:03:41,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:03:41,767 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:03:41,767 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:03:41,831 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:03:41,831 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2023-08-27 15:03:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:03:41,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126091753] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:03:41,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:03:41,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 6] total 22 [2023-08-27 15:03:41,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238158999] [2023-08-27 15:03:41,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:03:41,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 15:03:41,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:03:41,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 15:03:41,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2023-08-27 15:03:41,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 15:03:41,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 1330 transitions, 25908 flow. Second operand has 24 states, 24 states have (on average 88.375) internal successors, (2121), 24 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:41,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:03:41,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 15:03:41,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:03:45,971 INFO L124 PetriNetUnfolderBase]: 4581/8343 cut-off events. [2023-08-27 15:03:45,971 INFO L125 PetriNetUnfolderBase]: For 142706/142708 co-relation queries the response was YES. [2023-08-27 15:03:46,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80560 conditions, 8343 events. 4581/8343 cut-off events. For 142706/142708 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 62582 event pairs, 230 based on Foata normal form. 144/8411 useless extension candidates. Maximal degree in co-relation 80440. Up to 4381 conditions per place. [2023-08-27 15:03:46,076 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 554 selfloop transitions, 881 changer transitions 11/1448 dead transitions. [2023-08-27 15:03:46,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 1448 transitions, 30099 flow [2023-08-27 15:03:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 15:03:46,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 15:03:46,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2537 transitions. [2023-08-27 15:03:46,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.316373612669909 [2023-08-27 15:03:46,079 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2537 transitions. [2023-08-27 15:03:46,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2537 transitions. [2023-08-27 15:03:46,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:03:46,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2537 transitions. [2023-08-27 15:03:46,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 93.96296296296296) internal successors, (2537), 27 states have internal predecessors, (2537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:46,084 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 297.0) internal successors, (8316), 28 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:46,084 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 297.0) internal successors, (8316), 28 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:46,084 INFO L175 Difference]: Start difference. First operand has 417 places, 1330 transitions, 25908 flow. Second operand 27 states and 2537 transitions. [2023-08-27 15:03:46,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 1448 transitions, 30099 flow [2023-08-27 15:03:47,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1448 transitions, 28574 flow, removed 331 selfloop flow, removed 20 redundant places. [2023-08-27 15:03:47,734 INFO L231 Difference]: Finished difference. Result has 428 places, 1340 transitions, 26973 flow [2023-08-27 15:03:47,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=23828, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=830, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=26973, PETRI_PLACES=428, PETRI_TRANSITIONS=1340} [2023-08-27 15:03:47,735 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 395 predicate places. [2023-08-27 15:03:47,736 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 1340 transitions, 26973 flow [2023-08-27 15:03:47,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 88.375) internal successors, (2121), 24 states have internal predecessors, (2121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:47,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:03:47,736 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:03:47,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-27 15:03:47,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-27 15:03:47,941 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:03:47,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:03:47,941 INFO L85 PathProgramCache]: Analyzing trace with hash 130927539, now seen corresponding path program 5 times [2023-08-27 15:03:47,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:03:47,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298450957] [2023-08-27 15:03:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:03:47,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:03:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:03:48,688 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 15:03:48,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:03:48,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298450957] [2023-08-27 15:03:48,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298450957] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:03:48,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919445898] [2023-08-27 15:03:48,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:03:48,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:03:48,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:03:48,689 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:03:48,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-27 15:03:48,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 15:03:48,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:03:48,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 61 conjunts are in the unsatisfiable core [2023-08-27 15:03:48,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:03:48,909 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 15:03:48,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:03:48,993 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:03:49,230 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:03:49,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:03:49,655 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:03:49,655 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 180 treesize of output 120 [2023-08-27 15:03:49,707 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:03:49,708 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 776 treesize of output 756 [2023-08-27 15:03:49,767 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:03:49,768 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 248 treesize of output 292 [2023-08-27 15:03:49,818 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:03:49,818 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 247 treesize of output 251 [2023-08-27 15:03:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:03:55,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919445898] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:03:55,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:03:55,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-27 15:03:55,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987102018] [2023-08-27 15:03:55,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:03:55,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 15:03:55,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:03:55,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 15:03:55,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=967, Unknown=3, NotChecked=0, Total=1190 [2023-08-27 15:03:55,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:03:55,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 1340 transitions, 26973 flow. Second operand has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:03:55,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:03:55,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:03:55,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:05,133 INFO L124 PetriNetUnfolderBase]: 7429/13113 cut-off events. [2023-08-27 15:04:05,134 INFO L125 PetriNetUnfolderBase]: For 320369/320371 co-relation queries the response was YES. [2023-08-27 15:04:05,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138849 conditions, 13113 events. 7429/13113 cut-off events. For 320369/320371 co-relation queries the response was YES. Maximal size of possible extension queue 791. Compared 101153 event pairs, 439 based on Foata normal form. 930/13903 useless extension candidates. Maximal degree in co-relation 138729. Up to 6648 conditions per place. [2023-08-27 15:04:05,406 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 865 selfloop transitions, 1633 changer transitions 14/2514 dead transitions. [2023-08-27 15:04:05,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 2514 transitions, 57550 flow [2023-08-27 15:04:05,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-27 15:04:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-27 15:04:05,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 5298 transitions. [2023-08-27 15:04:05,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30755834204110066 [2023-08-27 15:04:05,414 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 5298 transitions. [2023-08-27 15:04:05,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 5298 transitions. [2023-08-27 15:04:05,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:05,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 5298 transitions. [2023-08-27 15:04:05,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 91.34482758620689) internal successors, (5298), 58 states have internal predecessors, (5298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:05,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 297.0) internal successors, (17523), 59 states have internal predecessors, (17523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:05,436 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 297.0) internal successors, (17523), 59 states have internal predecessors, (17523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:05,437 INFO L175 Difference]: Start difference. First operand has 428 places, 1340 transitions, 26973 flow. Second operand 58 states and 5298 transitions. [2023-08-27 15:04:05,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 2514 transitions, 57550 flow [2023-08-27 15:04:09,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 2514 transitions, 55704 flow, removed 246 selfloop flow, removed 18 redundant places. [2023-08-27 15:04:09,981 INFO L231 Difference]: Finished difference. Result has 492 places, 2300 transitions, 54513 flow [2023-08-27 15:04:09,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=23964, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=745, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=54513, PETRI_PLACES=492, PETRI_TRANSITIONS=2300} [2023-08-27 15:04:09,983 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 459 predicate places. [2023-08-27 15:04:09,983 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 2300 transitions, 54513 flow [2023-08-27 15:04:09,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:09,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:09,984 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:09,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-27 15:04:10,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-08-27 15:04:10,189 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:04:10,189 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:10,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1333611093, now seen corresponding path program 7 times [2023-08-27 15:04:10,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:10,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205119181] [2023-08-27 15:04:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:10,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:10,302 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:04:10,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:10,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205119181] [2023-08-27 15:04:10,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205119181] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:10,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490955401] [2023-08-27 15:04:10,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 15:04:10,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:10,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:10,305 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:04:10,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-27 15:04:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:10,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 15:04:10,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:10,484 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:04:10,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:04:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:04:10,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490955401] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:04:10,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:04:10,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 7] total 12 [2023-08-27 15:04:10,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419324759] [2023-08-27 15:04:10,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:04:10,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 15:04:10,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:10,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 15:04:10,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2023-08-27 15:04:10,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 297 [2023-08-27 15:04:10,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 2300 transitions, 54513 flow. Second operand has 14 states, 14 states have (on average 122.0) internal successors, (1708), 14 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:10,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:10,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 297 [2023-08-27 15:04:10,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:21,893 INFO L124 PetriNetUnfolderBase]: 10692/18596 cut-off events. [2023-08-27 15:04:21,893 INFO L125 PetriNetUnfolderBase]: For 572428/572430 co-relation queries the response was YES. [2023-08-27 15:04:22,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 217810 conditions, 18596 events. 10692/18596 cut-off events. For 572428/572430 co-relation queries the response was YES. Maximal size of possible extension queue 1050. Compared 147509 event pairs, 556 based on Foata normal form. 298/18724 useless extension candidates. Maximal degree in co-relation 217667. Up to 9427 conditions per place. [2023-08-27 15:04:22,218 INFO L140 encePairwiseOnDemand]: 290/297 looper letters, 1267 selfloop transitions, 2105 changer transitions 9/3383 dead transitions. [2023-08-27 15:04:22,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 3383 transitions, 88234 flow [2023-08-27 15:04:22,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 15:04:22,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 15:04:22,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 789 transitions. [2023-08-27 15:04:22,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44276094276094274 [2023-08-27 15:04:22,220 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 789 transitions. [2023-08-27 15:04:22,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 789 transitions. [2023-08-27 15:04:22,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:22,220 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 789 transitions. [2023-08-27 15:04:22,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 131.5) internal successors, (789), 6 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:22,222 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:22,222 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 297.0) internal successors, (2079), 7 states have internal predecessors, (2079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:22,222 INFO L175 Difference]: Start difference. First operand has 492 places, 2300 transitions, 54513 flow. Second operand 6 states and 789 transitions. [2023-08-27 15:04:22,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 3383 transitions, 88234 flow [2023-08-27 15:04:36,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 476 places, 3383 transitions, 72851 flow, removed 7610 selfloop flow, removed 21 redundant places. [2023-08-27 15:04:36,299 INFO L231 Difference]: Finished difference. Result has 480 places, 3345 transitions, 75755 flow [2023-08-27 15:04:36,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=45118, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=75755, PETRI_PLACES=480, PETRI_TRANSITIONS=3345} [2023-08-27 15:04:36,301 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 447 predicate places. [2023-08-27 15:04:36,301 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 3345 transitions, 75755 flow [2023-08-27 15:04:36,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 122.0) internal successors, (1708), 14 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:36,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:36,302 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:36,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-27 15:04:36,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:36,506 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:04:36,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:36,507 INFO L85 PathProgramCache]: Analyzing trace with hash 603466834, now seen corresponding path program 8 times [2023-08-27 15:04:36,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:36,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335404555] [2023-08-27 15:04:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:36,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:36,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:04:37,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:37,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:04:37,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335404555] [2023-08-27 15:04:37,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335404555] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:04:37,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894590242] [2023-08-27 15:04:37,298 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:04:37,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:04:37,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:04:37,300 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:04:37,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-27 15:04:37,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:04:37,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:04:37,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 15:04:37,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:04:37,511 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:04:37,541 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:04:37,564 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:04:37,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:04:37,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:04:38,123 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:04:38,124 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 63 treesize of output 51 [2023-08-27 15:04:38,133 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:04:38,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 324 treesize of output 295 [2023-08-27 15:04:38,140 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:04:38,141 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 84 [2023-08-27 15:04:38,154 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-27 15:04:38,154 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 71 [2023-08-27 15:04:38,330 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 15:04:38,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894590242] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:04:38,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:04:38,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-27 15:04:38,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290686494] [2023-08-27 15:04:38,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:04:38,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 15:04:38,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:04:38,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 15:04:38,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=987, Unknown=2, NotChecked=0, Total=1190 [2023-08-27 15:04:38,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:04:38,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 3345 transitions, 75755 flow. Second operand has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:38,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:04:38,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:04:38,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:04:51,779 INFO L124 PetriNetUnfolderBase]: 6799/12090 cut-off events. [2023-08-27 15:04:51,779 INFO L125 PetriNetUnfolderBase]: For 321271/321273 co-relation queries the response was YES. [2023-08-27 15:04:51,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140529 conditions, 12090 events. 6799/12090 cut-off events. For 321271/321273 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 90651 event pairs, 1006 based on Foata normal form. 352/12366 useless extension candidates. Maximal degree in co-relation 140389. Up to 5866 conditions per place. [2023-08-27 15:04:51,980 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 1929 selfloop transitions, 378 changer transitions 28/2337 dead transitions. [2023-08-27 15:04:51,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 2337 transitions, 59283 flow [2023-08-27 15:04:51,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-08-27 15:04:51,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-08-27 15:04:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 4424 transitions. [2023-08-27 15:04:51,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.303992303992304 [2023-08-27 15:04:51,984 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 4424 transitions. [2023-08-27 15:04:51,984 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 4424 transitions. [2023-08-27 15:04:51,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:04:51,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 4424 transitions. [2023-08-27 15:04:51,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 90.28571428571429) internal successors, (4424), 49 states have internal predecessors, (4424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:51,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 297.0) internal successors, (14850), 50 states have internal predecessors, (14850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:51,999 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 297.0) internal successors, (14850), 50 states have internal predecessors, (14850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:51,999 INFO L175 Difference]: Start difference. First operand has 480 places, 3345 transitions, 75755 flow. Second operand 49 states and 4424 transitions. [2023-08-27 15:04:52,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 2337 transitions, 59283 flow [2023-08-27 15:04:58,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 2337 transitions, 53595 flow, removed 2107 selfloop flow, removed 30 redundant places. [2023-08-27 15:04:59,021 INFO L231 Difference]: Finished difference. Result has 472 places, 1870 transitions, 41827 flow [2023-08-27 15:04:59,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=37646, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1758, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=41827, PETRI_PLACES=472, PETRI_TRANSITIONS=1870} [2023-08-27 15:04:59,022 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 439 predicate places. [2023-08-27 15:04:59,023 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 1870 transitions, 41827 flow [2023-08-27 15:04:59,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:04:59,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:04:59,023 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:04:59,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-27 15:04:59,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-27 15:04:59,224 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:04:59,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:04:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash 237945865, now seen corresponding path program 6 times [2023-08-27 15:04:59,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:04:59,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293162438] [2023-08-27 15:04:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:04:59,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:04:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:05:00,566 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 15:05:00,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:05:00,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293162438] [2023-08-27 15:05:00,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293162438] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:05:00,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692145256] [2023-08-27 15:05:00,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:05:00,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:05:00,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:05:00,568 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:05:00,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-27 15:05:00,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 15:05:00,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:05:00,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 15:05:00,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:05:00,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:05:00,967 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 42 treesize of output 40 [2023-08-27 15:05:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:05:01,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:05:01,273 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1425 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1425) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse0 (+ .cse1 c_~q~0.offset 8)) (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset)))) 2147483648)) is different from false [2023-08-27 15:05:01,418 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:05:01,419 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 108 treesize of output 140 [2023-08-27 15:05:01,488 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:05:01,489 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 7 [2023-08-27 15:05:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:05:01,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692145256] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:05:01,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:05:01,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 31 [2023-08-27 15:05:01,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496939956] [2023-08-27 15:05:01,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:05:01,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 15:05:01,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:05:01,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 15:05:01,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=878, Unknown=1, NotChecked=60, Total=1056 [2023-08-27 15:05:01,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 15:05:01,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 1870 transitions, 41827 flow. Second operand has 33 states, 33 states have (on average 88.27272727272727) internal successors, (2913), 33 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:05:01,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:05:01,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 15:05:01,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:05:03,536 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse4 c_~q~0.offset))) (let ((.cse0 (forall ((v_ArrVal_1425 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1425) c_~q~0.base))) (+ c_~s~0 (select .cse3 (+ .cse4 c_~q~0.offset 8)) (select .cse3 (+ .cse4 c_~q~0.offset 4)) (select .cse3 .cse2))) 2147483648))) (.cse1 (select |c_#memory_int| c_~q~0.base))) (and .cse0 (< (+ c_~s~0 (select .cse1 .cse2)) 2147483648) (or .cse0 (not (= (select .cse1 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1))))))) is different from false [2023-08-27 15:05:05,624 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:05:05,632 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_~q_front~0 4))) (let ((.cse0 (forall ((v_ArrVal_1425 (Array Int Int))) (< (let ((.cse3 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1425) c_~q~0.base))) (+ c_~s~0 (select .cse3 (+ .cse2 c_~q~0.offset 8)) (select .cse3 (+ .cse2 c_~q~0.offset 4)) (select .cse3 (+ .cse2 c_~q~0.offset)))) 2147483648))) (.cse1 (select |c_#memory_int| c_~q~0.base))) (and .cse0 (= (select .cse1 .cse2) 1) (<= c_~s~0 2) (= c_~q~0.offset 0) (or .cse0 (not (= (select .cse1 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)))))) is different from false [2023-08-27 15:05:05,796 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_1425 (Array Int Int))) (< (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1425) c_~q~0.base)) (.cse2 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse1 (+ .cse2 c_~q~0.offset 8)) (select .cse1 (+ .cse2 c_~q~0.offset 4)) (select .cse1 (+ .cse2 c_~q~0.offset)))) 2147483648)))) (and .cse0 (or .cse0 (not (= (select (select |c_#memory_int| c_~q~0.base) (+ c_~q~0.offset (* 4 c_~q_back~0))) 1))))) is different from false [2023-08-27 15:05:11,512 INFO L124 PetriNetUnfolderBase]: 7161/12674 cut-off events. [2023-08-27 15:05:11,512 INFO L125 PetriNetUnfolderBase]: For 291374/291376 co-relation queries the response was YES. [2023-08-27 15:05:11,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135000 conditions, 12674 events. 7161/12674 cut-off events. For 291374/291376 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 95718 event pairs, 569 based on Foata normal form. 354/12924 useless extension candidates. Maximal degree in co-relation 134866. Up to 10316 conditions per place. [2023-08-27 15:05:11,700 INFO L140 encePairwiseOnDemand]: 286/297 looper letters, 1687 selfloop transitions, 475 changer transitions 0/2164 dead transitions. [2023-08-27 15:05:11,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 2164 transitions, 51801 flow [2023-08-27 15:05:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 15:05:11,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 15:05:11,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3322 transitions. [2023-08-27 15:05:11,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31069958847736623 [2023-08-27 15:05:11,703 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3322 transitions. [2023-08-27 15:05:11,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3322 transitions. [2023-08-27 15:05:11,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:05:11,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3322 transitions. [2023-08-27 15:05:11,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 92.27777777777777) internal successors, (3322), 36 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:05:11,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 297.0) internal successors, (10989), 37 states have internal predecessors, (10989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:05:11,710 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 297.0) internal successors, (10989), 37 states have internal predecessors, (10989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:05:11,710 INFO L175 Difference]: Start difference. First operand has 472 places, 1870 transitions, 41827 flow. Second operand 36 states and 3322 transitions. [2023-08-27 15:05:11,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 2164 transitions, 51801 flow [2023-08-27 15:05:15,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 2164 transitions, 50406 flow, removed 522 selfloop flow, removed 21 redundant places. [2023-08-27 15:05:15,336 INFO L231 Difference]: Finished difference. Result has 493 places, 1998 transitions, 44955 flow [2023-08-27 15:05:15,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=39952, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1846, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=44955, PETRI_PLACES=493, PETRI_TRANSITIONS=1998} [2023-08-27 15:05:15,338 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 460 predicate places. [2023-08-27 15:05:15,338 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 1998 transitions, 44955 flow [2023-08-27 15:05:15,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 88.27272727272727) internal successors, (2913), 33 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:05:15,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:05:15,339 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:05:15,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-27 15:05:15,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:05:15,539 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:05:15,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:05:15,540 INFO L85 PathProgramCache]: Analyzing trace with hash -59161591, now seen corresponding path program 7 times [2023-08-27 15:05:15,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:05:15,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274563398] [2023-08-27 15:05:15,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:05:15,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:05:15,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:05:16,894 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 15:05:16,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:05:16,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274563398] [2023-08-27 15:05:16,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274563398] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:05:16,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225054436] [2023-08-27 15:05:16,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 15:05:16,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:05:16,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:05:16,896 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:05:16,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-27 15:05:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:05:17,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-27 15:05:17,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:05:17,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:05:17,235 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-27 15:05:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:05:17,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:05:17,573 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1468 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1468) c_~q~0.base))) (or (not (= (select .cse0 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< (let ((.cse1 (* c_~q_front~0 4))) (+ c_~s~0 (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 8)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) 2147483648)))) is different from false [2023-08-27 15:05:17,687 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:05:17,687 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 129 treesize of output 161 [2023-08-27 15:05:17,711 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:05:17,712 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 57 treesize of output 58 [2023-08-27 15:05:18,206 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 15:05:18,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225054436] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:05:18,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:05:18,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 31 [2023-08-27 15:05:18,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181060847] [2023-08-27 15:05:18,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:05:18,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 15:05:18,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:05:18,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 15:05:18,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=888, Unknown=1, NotChecked=60, Total=1056 [2023-08-27 15:05:18,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:05:18,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 1998 transitions, 44955 flow. Second operand has 33 states, 33 states have (on average 85.27272727272727) internal successors, (2814), 33 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:05:18,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:05:18,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:05:18,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:05:20,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:05:27,212 WARN L234 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 59 DAG size of output: 58 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:05:29,480 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:05:31,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:05:33,528 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:05:35,592 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:05:37,784 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:05:42,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:05:44,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:05:46,517 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:05:48,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:05:50,612 WARN L539 Checker$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 15:05:57,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:05:59,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:06:01,195 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:06:03,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:06:05,220 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:06:13,958 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:06:16,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:06:22,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:06:25,007 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:06:27,110 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:06:33,936 INFO L124 PetriNetUnfolderBase]: 7790/13726 cut-off events. [2023-08-27 15:06:33,936 INFO L125 PetriNetUnfolderBase]: For 372898/372900 co-relation queries the response was YES. [2023-08-27 15:06:34,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156207 conditions, 13726 events. 7790/13726 cut-off events. For 372898/372900 co-relation queries the response was YES. Maximal size of possible extension queue 754. Compared 104804 event pairs, 617 based on Foata normal form. 140/13762 useless extension candidates. Maximal degree in co-relation 156065. Up to 10639 conditions per place. [2023-08-27 15:06:34,177 INFO L140 encePairwiseOnDemand]: 285/297 looper letters, 1680 selfloop transitions, 751 changer transitions 0/2433 dead transitions. [2023-08-27 15:06:34,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 2433 transitions, 58674 flow [2023-08-27 15:06:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-27 15:06:34,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-27 15:06:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4471 transitions. [2023-08-27 15:06:34,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30107744107744105 [2023-08-27 15:06:34,181 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4471 transitions. [2023-08-27 15:06:34,181 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4471 transitions. [2023-08-27 15:06:34,181 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:34,181 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4471 transitions. [2023-08-27 15:06:34,184 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 89.42) internal successors, (4471), 50 states have internal predecessors, (4471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:34,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 297.0) internal successors, (15147), 51 states have internal predecessors, (15147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:34,191 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 297.0) internal successors, (15147), 51 states have internal predecessors, (15147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:34,191 INFO L175 Difference]: Start difference. First operand has 493 places, 1998 transitions, 44955 flow. Second operand 50 states and 4471 transitions. [2023-08-27 15:06:34,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 2433 transitions, 58674 flow [2023-08-27 15:06:38,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 2433 transitions, 57480 flow, removed 549 selfloop flow, removed 10 redundant places. [2023-08-27 15:06:38,596 INFO L231 Difference]: Finished difference. Result has 551 places, 2238 transitions, 51905 flow [2023-08-27 15:06:38,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=44144, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1996, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=528, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=51905, PETRI_PLACES=551, PETRI_TRANSITIONS=2238} [2023-08-27 15:06:38,598 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 518 predicate places. [2023-08-27 15:06:38,598 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 2238 transitions, 51905 flow [2023-08-27 15:06:38,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 85.27272727272727) internal successors, (2814), 33 states have internal predecessors, (2814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:38,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:06:38,599 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:06:38,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-27 15:06:38,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-08-27 15:06:38,804 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:06:38,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:06:38,805 INFO L85 PathProgramCache]: Analyzing trace with hash 603466885, now seen corresponding path program 8 times [2023-08-27 15:06:38,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:06:38,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302990814] [2023-08-27 15:06:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:06:38,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:06:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:06:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:06:39,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:06:39,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302990814] [2023-08-27 15:06:39,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302990814] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:06:39,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110329640] [2023-08-27 15:06:39,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:06:39,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:06:39,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:06:39,668 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:06:39,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-27 15:06:39,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:06:39,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:06:39,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 66 conjunts are in the unsatisfiable core [2023-08-27 15:06:39,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:06:39,914 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 15:06:39,961 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:06:39,998 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:06:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:06:40,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:06:41,162 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:06:41,162 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 179 treesize of output 119 [2023-08-27 15:06:41,237 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-27 15:06:41,237 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 768 treesize of output 720 [2023-08-27 15:06:41,254 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:06:41,255 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:06:41,256 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:06:41,259 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:06:41,260 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:06:41,293 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:06:41,293 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 247 treesize of output 262 [2023-08-27 15:06:41,372 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-27 15:06:41,372 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 245 treesize of output 221 [2023-08-27 15:06:45,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:06:45,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110329640] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:06:45,197 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:06:45,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-27 15:06:45,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726067173] [2023-08-27 15:06:45,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:06:45,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 15:06:45,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:06:45,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 15:06:45,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=916, Unknown=1, NotChecked=0, Total=1190 [2023-08-27 15:06:45,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:06:45,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 2238 transitions, 51905 flow. Second operand has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:45,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:06:45,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:06:45,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:06:58,570 INFO L124 PetriNetUnfolderBase]: 7800/13738 cut-off events. [2023-08-27 15:06:58,570 INFO L125 PetriNetUnfolderBase]: For 518691/518693 co-relation queries the response was YES. [2023-08-27 15:06:58,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171700 conditions, 13738 events. 7800/13738 cut-off events. For 518691/518693 co-relation queries the response was YES. Maximal size of possible extension queue 799. Compared 105329 event pairs, 1016 based on Foata normal form. 12/13646 useless extension candidates. Maximal degree in co-relation 171538. Up to 13098 conditions per place. [2023-08-27 15:06:58,818 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 2128 selfloop transitions, 225 changer transitions 3/2358 dead transitions. [2023-08-27 15:06:58,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 2358 transitions, 58720 flow [2023-08-27 15:06:58,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-27 15:06:58,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-27 15:06:58,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 4414 transitions. [2023-08-27 15:06:58,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29723905723905725 [2023-08-27 15:06:58,821 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 4414 transitions. [2023-08-27 15:06:58,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 4414 transitions. [2023-08-27 15:06:58,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:06:58,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 4414 transitions. [2023-08-27 15:06:58,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 88.28) internal successors, (4414), 50 states have internal predecessors, (4414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:58,831 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 297.0) internal successors, (15147), 51 states have internal predecessors, (15147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:58,831 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 297.0) internal successors, (15147), 51 states have internal predecessors, (15147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:06:58,831 INFO L175 Difference]: Start difference. First operand has 551 places, 2238 transitions, 51905 flow. Second operand 50 states and 4414 transitions. [2023-08-27 15:06:58,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 2358 transitions, 58720 flow [2023-08-27 15:07:04,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 2358 transitions, 57348 flow, removed 540 selfloop flow, removed 17 redundant places. [2023-08-27 15:07:04,262 INFO L231 Difference]: Finished difference. Result has 587 places, 2250 transitions, 51448 flow [2023-08-27 15:07:04,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=50542, PETRI_DIFFERENCE_MINUEND_PLACES=534, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2010, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=51448, PETRI_PLACES=587, PETRI_TRANSITIONS=2250} [2023-08-27 15:07:04,265 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 554 predicate places. [2023-08-27 15:07:04,265 INFO L495 AbstractCegarLoop]: Abstraction has has 587 places, 2250 transitions, 51448 flow [2023-08-27 15:07:04,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 85.2) internal successors, (2982), 35 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:04,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:07:04,266 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:07:04,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-27 15:07:04,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-27 15:07:04,475 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:07:04,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:07:04,475 INFO L85 PathProgramCache]: Analyzing trace with hash 767613811, now seen corresponding path program 5 times [2023-08-27 15:07:04,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:07:04,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790304103] [2023-08-27 15:07:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:07:04,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:07:04,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:04,860 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 15:07:04,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:07:04,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790304103] [2023-08-27 15:07:04,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790304103] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:07:04,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042946908] [2023-08-27 15:07:04,860 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:07:04,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:07:04,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:07:04,861 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:07:04,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-27 15:07:05,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 15:07:05,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:07:05,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 15:07:05,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:07:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:07:05,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:07:05,745 INFO L322 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2023-08-27 15:07:05,746 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 70 treesize of output 104 [2023-08-27 15:07:06,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:07:06,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042946908] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:07:06,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:07:06,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 15:07:06,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880949830] [2023-08-27 15:07:06,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:07:06,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 15:07:06,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:07:06,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 15:07:06,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2023-08-27 15:07:06,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 297 [2023-08-27 15:07:06,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 587 places, 2250 transitions, 51448 flow. Second operand has 32 states, 32 states have (on average 92.3125) internal successors, (2954), 32 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:06,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:07:06,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 297 [2023-08-27 15:07:06,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:07:12,806 INFO L124 PetriNetUnfolderBase]: 4114/7394 cut-off events. [2023-08-27 15:07:12,806 INFO L125 PetriNetUnfolderBase]: For 303537/303539 co-relation queries the response was YES. [2023-08-27 15:07:12,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94018 conditions, 7394 events. 4114/7394 cut-off events. For 303537/303539 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 53396 event pairs, 1074 based on Foata normal form. 211/7571 useless extension candidates. Maximal degree in co-relation 93851. Up to 6268 conditions per place. [2023-08-27 15:07:12,921 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 1193 selfloop transitions, 154 changer transitions 43/1392 dead transitions. [2023-08-27 15:07:12,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 1392 transitions, 35636 flow [2023-08-27 15:07:12,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 15:07:12,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 15:07:12,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3174 transitions. [2023-08-27 15:07:12,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32384450566268747 [2023-08-27 15:07:12,924 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3174 transitions. [2023-08-27 15:07:12,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3174 transitions. [2023-08-27 15:07:12,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:07:12,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3174 transitions. [2023-08-27 15:07:12,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 96.18181818181819) internal successors, (3174), 33 states have internal predecessors, (3174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:12,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 297.0) internal successors, (10098), 34 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:12,930 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 297.0) internal successors, (10098), 34 states have internal predecessors, (10098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:12,930 INFO L175 Difference]: Start difference. First operand has 587 places, 2250 transitions, 51448 flow. Second operand 33 states and 3174 transitions. [2023-08-27 15:07:12,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 1392 transitions, 35636 flow [2023-08-27 15:07:15,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 1392 transitions, 33433 flow, removed 463 selfloop flow, removed 63 redundant places. [2023-08-27 15:07:15,247 INFO L231 Difference]: Finished difference. Result has 533 places, 1258 transitions, 28742 flow [2023-08-27 15:07:15,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=28823, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=28742, PETRI_PLACES=533, PETRI_TRANSITIONS=1258} [2023-08-27 15:07:15,249 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 500 predicate places. [2023-08-27 15:07:15,249 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 1258 transitions, 28742 flow [2023-08-27 15:07:15,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 92.3125) internal successors, (2954), 32 states have internal predecessors, (2954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:15,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:07:15,249 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:07:15,254 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-27 15:07:15,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-27 15:07:15,450 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:07:15,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:07:15,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1500397869, now seen corresponding path program 6 times [2023-08-27 15:07:15,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:07:15,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015222451] [2023-08-27 15:07:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:07:15,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:07:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:07:15,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:07:15,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015222451] [2023-08-27 15:07:15,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015222451] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:07:15,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965009336] [2023-08-27 15:07:15,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:07:15,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:07:15,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:07:15,762 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:07:15,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-27 15:07:15,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 15:07:15,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:07:15,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 15:07:15,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:07:15,978 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:07:16,015 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:07:16,078 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:07:16,237 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:07:16,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:07:16,663 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:07:16,663 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 61 treesize of output 49 [2023-08-27 15:07:16,673 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:07:16,673 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 308 treesize of output 279 [2023-08-27 15:07:16,680 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:07:16,680 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 80 [2023-08-27 15:07:16,691 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-27 15:07:16,691 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 67 [2023-08-27 15:07:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:07:16,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965009336] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:07:16,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:07:16,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-08-27 15:07:16,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629155743] [2023-08-27 15:07:16,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:07:16,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-27 15:07:16,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:07:16,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-27 15:07:16,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=936, Unknown=1, NotChecked=0, Total=1122 [2023-08-27 15:07:16,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:07:16,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 1258 transitions, 28742 flow. Second operand has 34 states, 34 states have (on average 85.23529411764706) internal successors, (2898), 34 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:16,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:07:16,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:07:16,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:07:19,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:07:22,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:07:24,950 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:07:27,125 INFO L124 PetriNetUnfolderBase]: 4055/7209 cut-off events. [2023-08-27 15:07:27,125 INFO L125 PetriNetUnfolderBase]: For 274312/274314 co-relation queries the response was YES. [2023-08-27 15:07:27,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88898 conditions, 7209 events. 4055/7209 cut-off events. For 274312/274314 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 51306 event pairs, 1056 based on Foata normal form. 20/7193 useless extension candidates. Maximal degree in co-relation 88748. Up to 6268 conditions per place. [2023-08-27 15:07:27,238 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 1172 selfloop transitions, 129 changer transitions 12/1315 dead transitions. [2023-08-27 15:07:27,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 1315 transitions, 32108 flow [2023-08-27 15:07:27,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 15:07:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 15:07:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2306 transitions. [2023-08-27 15:07:27,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29862729862729864 [2023-08-27 15:07:27,240 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2306 transitions. [2023-08-27 15:07:27,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2306 transitions. [2023-08-27 15:07:27,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:07:27,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2306 transitions. [2023-08-27 15:07:27,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 88.6923076923077) internal successors, (2306), 26 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:27,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 297.0) internal successors, (8019), 27 states have internal predecessors, (8019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:27,245 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 297.0) internal successors, (8019), 27 states have internal predecessors, (8019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:27,246 INFO L175 Difference]: Start difference. First operand has 533 places, 1258 transitions, 28742 flow. Second operand 26 states and 2306 transitions. [2023-08-27 15:07:27,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 1315 transitions, 32108 flow [2023-08-27 15:07:29,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 1315 transitions, 31608 flow, removed 148 selfloop flow, removed 32 redundant places. [2023-08-27 15:07:29,405 INFO L231 Difference]: Finished difference. Result has 512 places, 1233 transitions, 27837 flow [2023-08-27 15:07:29,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=27796, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=27837, PETRI_PLACES=512, PETRI_TRANSITIONS=1233} [2023-08-27 15:07:29,407 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 479 predicate places. [2023-08-27 15:07:29,407 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 1233 transitions, 27837 flow [2023-08-27 15:07:29,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 85.23529411764706) internal successors, (2898), 34 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:29,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:07:29,407 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:07:29,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-27 15:07:29,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-27 15:07:29,608 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:07:29,608 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:07:29,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1484936763, now seen corresponding path program 9 times [2023-08-27 15:07:29,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:07:29,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440480998] [2023-08-27 15:07:29,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:07:29,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:07:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:07:30,553 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:07:30,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:07:30,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440480998] [2023-08-27 15:07:30,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440480998] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:07:30,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261467057] [2023-08-27 15:07:30,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:07:30,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:07:30,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:07:30,554 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:07:30,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-27 15:07:30,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 15:07:30,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:07:30,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-27 15:07:30,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:07:30,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:07:30,949 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 15:07:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:07:31,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:07:31,735 INFO L322 Elim1Store]: treesize reduction 48, result has 53.4 percent of original size [2023-08-27 15:07:31,735 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 148 treesize of output 151 [2023-08-27 15:07:31,777 INFO L322 Elim1Store]: treesize reduction 48, result has 37.7 percent of original size [2023-08-27 15:07:31,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 81 treesize of output 76 [2023-08-27 15:07:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:07:32,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261467057] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:07:32,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:07:32,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 33 [2023-08-27 15:07:32,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495367706] [2023-08-27 15:07:32,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:07:32,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 15:07:32,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:07:32,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 15:07:32,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=944, Unknown=1, NotChecked=0, Total=1190 [2023-08-27 15:07:32,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 15:07:32,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 1233 transitions, 27837 flow. Second operand has 35 states, 35 states have (on average 88.2) internal successors, (3087), 35 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:07:32,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:07:32,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 15:07:32,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:07:43,336 WARN L234 SmtUtils]: Spent 10.31s on a formula simplification. DAG size of input: 102 DAG size of output: 101 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:08:02,381 WARN L234 SmtUtils]: Spent 12.25s on a formula simplification. DAG size of input: 86 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:08:06,553 INFO L124 PetriNetUnfolderBase]: 4077/7233 cut-off events. [2023-08-27 15:08:06,553 INFO L125 PetriNetUnfolderBase]: For 267491/267493 co-relation queries the response was YES. [2023-08-27 15:08:06,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88137 conditions, 7233 events. 4077/7233 cut-off events. For 267491/267493 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 51160 event pairs, 597 based on Foata normal form. 4/7203 useless extension candidates. Maximal degree in co-relation 87993. Up to 6407 conditions per place. [2023-08-27 15:08:06,659 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 1113 selfloop transitions, 227 changer transitions 7/1349 dead transitions. [2023-08-27 15:08:06,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 1349 transitions, 32542 flow [2023-08-27 15:08:06,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-08-27 15:08:06,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-08-27 15:08:06,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4023 transitions. [2023-08-27 15:08:06,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30785123966942146 [2023-08-27 15:08:06,662 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4023 transitions. [2023-08-27 15:08:06,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4023 transitions. [2023-08-27 15:08:06,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:08:06,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4023 transitions. [2023-08-27 15:08:06,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 91.43181818181819) internal successors, (4023), 44 states have internal predecessors, (4023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:06,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 297.0) internal successors, (13365), 45 states have internal predecessors, (13365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:06,671 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 297.0) internal successors, (13365), 45 states have internal predecessors, (13365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:06,671 INFO L175 Difference]: Start difference. First operand has 512 places, 1233 transitions, 27837 flow. Second operand 44 states and 4023 transitions. [2023-08-27 15:08:06,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 1349 transitions, 32542 flow [2023-08-27 15:08:08,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 1349 transitions, 31766 flow, removed 146 selfloop flow, removed 24 redundant places. [2023-08-27 15:08:08,550 INFO L231 Difference]: Finished difference. Result has 533 places, 1253 transitions, 28180 flow [2023-08-27 15:08:08,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=27049, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1009, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=28180, PETRI_PLACES=533, PETRI_TRANSITIONS=1253} [2023-08-27 15:08:08,551 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 500 predicate places. [2023-08-27 15:08:08,551 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 1253 transitions, 28180 flow [2023-08-27 15:08:08,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 88.2) internal successors, (3087), 35 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:08,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:08:08,551 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:08:08,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-27 15:08:08,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-27 15:08:08,752 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:08:08,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:08:08,752 INFO L85 PathProgramCache]: Analyzing trace with hash -700392983, now seen corresponding path program 10 times [2023-08-27 15:08:08,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:08:08,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418946116] [2023-08-27 15:08:08,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:08:08,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:08:08,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:08:09,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:08:09,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:08:09,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418946116] [2023-08-27 15:08:09,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418946116] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:08:09,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719118023] [2023-08-27 15:08:09,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:08:09,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:08:09,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:08:09,592 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:08:09,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-27 15:08:09,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:08:09,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:08:09,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 15:08:09,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:08:09,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:08:09,900 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-27 15:08:10,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:08:10,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:08:12,368 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:08:12,369 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 129 treesize of output 161 [2023-08-27 15:08:12,389 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:08:12,389 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 57 treesize of output 58 [2023-08-27 15:08:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:08:12,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719118023] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:08:12,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:08:12,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 29 [2023-08-27 15:08:12,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174510090] [2023-08-27 15:08:12,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:08:12,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-27 15:08:12,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:08:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-27 15:08:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=818, Unknown=7, NotChecked=0, Total=930 [2023-08-27 15:08:12,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:08:12,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 1253 transitions, 28180 flow. Second operand has 31 states, 31 states have (on average 85.29032258064517) internal successors, (2644), 31 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:08:12,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:08:12,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:08:12,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:08:19,576 WARN L234 SmtUtils]: Spent 6.19s on a formula simplification. DAG size of input: 77 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:08:28,052 WARN L234 SmtUtils]: Spent 8.15s on a formula simplification. DAG size of input: 83 DAG size of output: 59 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:08:34,199 WARN L234 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 15:08:36,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:08:38,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:08:43,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:08:47,808 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:08:50,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:08:54,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:08:56,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:08:58,797 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 15:09:04,165 INFO L124 PetriNetUnfolderBase]: 4656/8214 cut-off events. [2023-08-27 15:09:04,165 INFO L125 PetriNetUnfolderBase]: For 305276/305278 co-relation queries the response was YES. [2023-08-27 15:09:04,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100483 conditions, 8214 events. 4656/8214 cut-off events. For 305276/305278 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 58510 event pairs, 99 based on Foata normal form. 196/8334 useless extension candidates. Maximal degree in co-relation 100335. Up to 4476 conditions per place. [2023-08-27 15:09:04,368 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 699 selfloop transitions, 1004 changer transitions 7/1712 dead transitions. [2023-08-27 15:09:04,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 577 places, 1712 transitions, 41415 flow [2023-08-27 15:09:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-27 15:09:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-27 15:09:04,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4283 transitions. [2023-08-27 15:09:04,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3004349046015713 [2023-08-27 15:09:04,380 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4283 transitions. [2023-08-27 15:09:04,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4283 transitions. [2023-08-27 15:09:04,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:09:04,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4283 transitions. [2023-08-27 15:09:04,384 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 89.22916666666667) internal successors, (4283), 48 states have internal predecessors, (4283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:04,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 297.0) internal successors, (14553), 49 states have internal predecessors, (14553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:04,394 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 297.0) internal successors, (14553), 49 states have internal predecessors, (14553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:04,395 INFO L175 Difference]: Start difference. First operand has 533 places, 1253 transitions, 28180 flow. Second operand 48 states and 4283 transitions. [2023-08-27 15:09:04,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 577 places, 1712 transitions, 41415 flow [2023-08-27 15:09:06,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 1712 transitions, 40841 flow, removed 108 selfloop flow, removed 33 redundant places. [2023-08-27 15:09:06,572 INFO L231 Difference]: Finished difference. Result has 554 places, 1542 transitions, 38159 flow [2023-08-27 15:09:06,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=27590, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=771, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=38159, PETRI_PLACES=554, PETRI_TRANSITIONS=1542} [2023-08-27 15:09:06,574 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 521 predicate places. [2023-08-27 15:09:06,574 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 1542 transitions, 38159 flow [2023-08-27 15:09:06,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 85.29032258064517) internal successors, (2644), 31 states have internal predecessors, (2644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:06,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:09:06,575 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:09:06,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-27 15:09:06,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-08-27 15:09:06,775 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:09:06,776 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:09:06,776 INFO L85 PathProgramCache]: Analyzing trace with hash -403282788, now seen corresponding path program 9 times [2023-08-27 15:09:06,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:09:06,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296625238] [2023-08-27 15:09:06,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:09:06,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:09:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:09:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:09:07,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:09:07,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296625238] [2023-08-27 15:09:07,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296625238] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:09:07,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199788270] [2023-08-27 15:09:07,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:09:07,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:09:07,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:09:07,316 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:09:07,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-27 15:09:07,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 15:09:07,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:09:07,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-27 15:09:07,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:09:07,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:09:07,640 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 15:09:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:09:07,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:09:07,842 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:09:07,843 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 41 [2023-08-27 15:09:07,852 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 5 [2023-08-27 15:09:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 15:09:07,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199788270] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:09:07,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:09:07,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 27 [2023-08-27 15:09:07,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641583362] [2023-08-27 15:09:07,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:09:07,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 15:09:07,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:09:07,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 15:09:07,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=731, Unknown=4, NotChecked=0, Total=812 [2023-08-27 15:09:07,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:09:07,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 1542 transitions, 38159 flow. Second operand has 29 states, 29 states have (on average 85.3103448275862) internal successors, (2474), 29 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:07,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:09:07,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:09:07,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:09:10,456 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_~q_front~0 4))) (let ((.cse0 (+ .cse2 c_~q~0.offset 8)) (.cse1 (select |c_#memory_int| c_~q~0.base))) (and (forall ((v_ArrVal_1707 (Array Int Int))) (< 0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1707) c_~q~0.base) .cse0) 1))) (= (select .cse1 (+ .cse2 c_~q~0.offset 4)) 1) (< 0 (+ (select .cse1 .cse0) 1)) (<= 0 (+ c_~s~0 2147483648)) (= (select .cse1 (+ .cse2 c_~q~0.offset)) 1)))) is different from false [2023-08-27 15:09:14,117 INFO L124 PetriNetUnfolderBase]: 4368/7910 cut-off events. [2023-08-27 15:09:14,117 INFO L125 PetriNetUnfolderBase]: For 328754/328756 co-relation queries the response was YES. [2023-08-27 15:09:14,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102358 conditions, 7910 events. 4368/7910 cut-off events. For 328754/328756 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 57598 event pairs, 44 based on Foata normal form. 270/8138 useless extension candidates. Maximal degree in co-relation 102202. Up to 3816 conditions per place. [2023-08-27 15:09:14,239 INFO L140 encePairwiseOnDemand]: 285/297 looper letters, 542 selfloop transitions, 1114 changer transitions 10/1668 dead transitions. [2023-08-27 15:09:14,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 590 places, 1668 transitions, 43523 flow [2023-08-27 15:09:14,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-27 15:09:14,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-27 15:09:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3596 transitions. [2023-08-27 15:09:14,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3026936026936027 [2023-08-27 15:09:14,242 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3596 transitions. [2023-08-27 15:09:14,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3596 transitions. [2023-08-27 15:09:14,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:09:14,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3596 transitions. [2023-08-27 15:09:14,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 89.9) internal successors, (3596), 40 states have internal predecessors, (3596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:14,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 297.0) internal successors, (12177), 41 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:14,251 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 297.0) internal successors, (12177), 41 states have internal predecessors, (12177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:14,251 INFO L175 Difference]: Start difference. First operand has 554 places, 1542 transitions, 38159 flow. Second operand 40 states and 3596 transitions. [2023-08-27 15:09:14,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 590 places, 1668 transitions, 43523 flow [2023-08-27 15:09:16,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 1668 transitions, 41659 flow, removed 635 selfloop flow, removed 35 redundant places. [2023-08-27 15:09:16,930 INFO L231 Difference]: Finished difference. Result has 558 places, 1483 transitions, 37332 flow [2023-08-27 15:09:16,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=34222, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1077, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=37332, PETRI_PLACES=558, PETRI_TRANSITIONS=1483} [2023-08-27 15:09:16,931 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 525 predicate places. [2023-08-27 15:09:16,932 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 1483 transitions, 37332 flow [2023-08-27 15:09:16,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 85.3103448275862) internal successors, (2474), 29 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:16,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:09:16,932 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:09:16,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-08-27 15:09:17,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2023-08-27 15:09:17,133 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:09:17,133 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:09:17,133 INFO L85 PathProgramCache]: Analyzing trace with hash -676879786, now seen corresponding path program 10 times [2023-08-27 15:09:17,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:09:17,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138040576] [2023-08-27 15:09:17,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:09:17,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:09:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:09:18,805 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 15:09:18,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:09:18,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138040576] [2023-08-27 15:09:18,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138040576] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:09:18,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223810898] [2023-08-27 15:09:18,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:09:18,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:09:18,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:09:18,806 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:09:18,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-27 15:09:18,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:09:18,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:09:18,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 15:09:18,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:09:19,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 15:09:19,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:09:19,198 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:09:19,198 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2023-08-27 15:09:19,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:09:19,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223810898] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:09:19,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:09:19,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 5] total 21 [2023-08-27 15:09:19,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117129994] [2023-08-27 15:09:19,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:09:19,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 15:09:19,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:09:19,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 15:09:19,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=454, Unknown=0, NotChecked=0, Total=506 [2023-08-27 15:09:19,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:09:19,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 1483 transitions, 37332 flow. Second operand has 23 states, 23 states have (on average 85.43478260869566) internal successors, (1965), 23 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:19,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:09:19,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:09:19,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:09:24,120 INFO L124 PetriNetUnfolderBase]: 4094/7394 cut-off events. [2023-08-27 15:09:24,120 INFO L125 PetriNetUnfolderBase]: For 322115/322117 co-relation queries the response was YES. [2023-08-27 15:09:24,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97993 conditions, 7394 events. 4094/7394 cut-off events. For 322115/322117 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 53388 event pairs, 272 based on Foata normal form. 206/7592 useless extension candidates. Maximal degree in co-relation 97840. Up to 4977 conditions per place. [2023-08-27 15:09:24,236 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 934 selfloop transitions, 633 changer transitions 2/1571 dead transitions. [2023-08-27 15:09:24,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 579 places, 1571 transitions, 41747 flow [2023-08-27 15:09:24,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 15:09:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 15:09:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2427 transitions. [2023-08-27 15:09:24,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30265619154508044 [2023-08-27 15:09:24,239 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2427 transitions. [2023-08-27 15:09:24,239 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2427 transitions. [2023-08-27 15:09:24,239 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:09:24,239 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2427 transitions. [2023-08-27 15:09:24,241 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 89.88888888888889) internal successors, (2427), 27 states have internal predecessors, (2427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:24,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 297.0) internal successors, (8316), 28 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:24,245 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 297.0) internal successors, (8316), 28 states have internal predecessors, (8316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:24,245 INFO L175 Difference]: Start difference. First operand has 558 places, 1483 transitions, 37332 flow. Second operand 27 states and 2427 transitions. [2023-08-27 15:09:24,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 579 places, 1571 transitions, 41747 flow [2023-08-27 15:09:26,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 553 places, 1571 transitions, 40128 flow, removed 188 selfloop flow, removed 26 redundant places. [2023-08-27 15:09:26,377 INFO L231 Difference]: Finished difference. Result has 554 places, 1455 transitions, 36475 flow [2023-08-27 15:09:26,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=34170, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=594, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=821, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=36475, PETRI_PLACES=554, PETRI_TRANSITIONS=1455} [2023-08-27 15:09:26,379 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 521 predicate places. [2023-08-27 15:09:26,379 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 1455 transitions, 36475 flow [2023-08-27 15:09:26,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 85.43478260869566) internal successors, (1965), 23 states have internal predecessors, (1965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:26,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:09:26,379 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:09:26,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-27 15:09:26,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:09:26,585 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:09:26,585 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:09:26,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1408842413, now seen corresponding path program 7 times [2023-08-27 15:09:26,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:09:26,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709192793] [2023-08-27 15:09:26,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:09:26,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:09:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:09:27,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:09:27,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:09:27,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709192793] [2023-08-27 15:09:27,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709192793] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:09:27,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771785560] [2023-08-27 15:09:27,213 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 15:09:27,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:09:27,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:09:27,214 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:09:27,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-27 15:09:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:09:27,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-27 15:09:27,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:09:27,456 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-27 15:09:27,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:09:27,482 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:09:27,482 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-27 15:09:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-27 15:09:27,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771785560] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:09:27,519 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:09:27,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 4] total 17 [2023-08-27 15:09:27,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412369196] [2023-08-27 15:09:27,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:09:27,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 15:09:27,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:09:27,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 15:09:27,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2023-08-27 15:09:27,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 297 [2023-08-27 15:09:27,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 1455 transitions, 36475 flow. Second operand has 19 states, 19 states have (on average 92.57894736842105) internal successors, (1759), 19 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:27,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:09:27,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 297 [2023-08-27 15:09:27,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:09:31,145 INFO L124 PetriNetUnfolderBase]: 4120/7417 cut-off events. [2023-08-27 15:09:31,145 INFO L125 PetriNetUnfolderBase]: For 307104/307106 co-relation queries the response was YES. [2023-08-27 15:09:31,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97100 conditions, 7417 events. 4120/7417 cut-off events. For 307104/307106 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 53567 event pairs, 643 based on Foata normal form. 8/7417 useless extension candidates. Maximal degree in co-relation 96951. Up to 6959 conditions per place. [2023-08-27 15:09:31,271 INFO L140 encePairwiseOnDemand]: 289/297 looper letters, 1361 selfloop transitions, 160 changer transitions 0/1523 dead transitions. [2023-08-27 15:09:31,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 569 places, 1523 transitions, 40893 flow [2023-08-27 15:09:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 15:09:31,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 15:09:31,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1631 transitions. [2023-08-27 15:09:31,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3230342642107348 [2023-08-27 15:09:31,273 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1631 transitions. [2023-08-27 15:09:31,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1631 transitions. [2023-08-27 15:09:31,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:09:31,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1631 transitions. [2023-08-27 15:09:31,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 95.94117647058823) internal successors, (1631), 17 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:31,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 297.0) internal successors, (5346), 18 states have internal predecessors, (5346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:31,277 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 297.0) internal successors, (5346), 18 states have internal predecessors, (5346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:31,277 INFO L175 Difference]: Start difference. First operand has 554 places, 1455 transitions, 36475 flow. Second operand 17 states and 1631 transitions. [2023-08-27 15:09:31,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 569 places, 1523 transitions, 40893 flow [2023-08-27 15:09:33,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 557 places, 1523 transitions, 40415 flow, removed 67 selfloop flow, removed 12 redundant places. [2023-08-27 15:09:33,724 INFO L231 Difference]: Finished difference. Result has 557 places, 1488 transitions, 37175 flow [2023-08-27 15:09:33,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=35997, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=37175, PETRI_PLACES=557, PETRI_TRANSITIONS=1488} [2023-08-27 15:09:33,725 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 524 predicate places. [2023-08-27 15:09:33,725 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 1488 transitions, 37175 flow [2023-08-27 15:09:33,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 92.57894736842105) internal successors, (1759), 19 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:33,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:09:33,726 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:09:33,730 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-27 15:09:33,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-08-27 15:09:33,927 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:09:33,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:09:33,927 INFO L85 PathProgramCache]: Analyzing trace with hash -47156353, now seen corresponding path program 8 times [2023-08-27 15:09:33,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:09:33,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297635499] [2023-08-27 15:09:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:09:33,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:09:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:09:35,484 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 15:09:35,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:09:35,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297635499] [2023-08-27 15:09:35,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297635499] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:09:35,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918111219] [2023-08-27 15:09:35,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:09:35,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:09:35,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:09:35,485 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:09:35,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-27 15:09:35,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:09:35,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:09:35,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 15:09:35,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:09:35,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:09:35,839 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2023-08-27 15:09:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:09:35,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:09:36,016 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1834 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1834) c_~q~0.base) (+ (* c_~q_front~0 4) c_~q~0.offset 8)) 1)) is different from false [2023-08-27 15:09:36,025 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:09:36,025 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 37 [2023-08-27 15:09:36,032 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-27 15:09:36,162 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 15:09:36,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918111219] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:09:36,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:09:36,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 8] total 31 [2023-08-27 15:09:36,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451528364] [2023-08-27 15:09:36,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:09:36,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 15:09:36,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:09:36,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 15:09:36,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=899, Unknown=1, NotChecked=60, Total=1056 [2023-08-27 15:09:36,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 297 [2023-08-27 15:09:36,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 1488 transitions, 37175 flow. Second operand has 33 states, 33 states have (on average 88.27272727272727) internal successors, (2913), 33 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:36,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:09:36,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 297 [2023-08-27 15:09:36,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:09:40,326 INFO L124 PetriNetUnfolderBase]: 4126/7434 cut-off events. [2023-08-27 15:09:40,326 INFO L125 PetriNetUnfolderBase]: For 304870/304872 co-relation queries the response was YES. [2023-08-27 15:09:40,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96771 conditions, 7434 events. 4126/7434 cut-off events. For 304870/304872 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 53911 event pairs, 236 based on Foata normal form. 8/7434 useless extension candidates. Maximal degree in co-relation 96625. Up to 4575 conditions per place. [2023-08-27 15:09:40,458 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 872 selfloop transitions, 679 changer transitions 0/1553 dead transitions. [2023-08-27 15:09:40,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 1553 transitions, 41349 flow [2023-08-27 15:09:40,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 15:09:40,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 15:09:40,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2216 transitions. [2023-08-27 15:09:40,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3108866442199775 [2023-08-27 15:09:40,460 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2216 transitions. [2023-08-27 15:09:40,460 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2216 transitions. [2023-08-27 15:09:40,460 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:09:40,460 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2216 transitions. [2023-08-27 15:09:40,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 92.33333333333333) internal successors, (2216), 24 states have internal predecessors, (2216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:40,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 297.0) internal successors, (7425), 25 states have internal predecessors, (7425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:40,467 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 297.0) internal successors, (7425), 25 states have internal predecessors, (7425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:40,467 INFO L175 Difference]: Start difference. First operand has 557 places, 1488 transitions, 37175 flow. Second operand 24 states and 2216 transitions. [2023-08-27 15:09:40,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 1553 transitions, 41349 flow [2023-08-27 15:09:42,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 1553 transitions, 41003 flow, removed 29 selfloop flow, removed 11 redundant places. [2023-08-27 15:09:42,824 INFO L231 Difference]: Finished difference. Result has 569 places, 1490 transitions, 38223 flow [2023-08-27 15:09:42,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=36813, PETRI_DIFFERENCE_MINUEND_PLACES=546, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=676, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=811, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=38223, PETRI_PLACES=569, PETRI_TRANSITIONS=1490} [2023-08-27 15:09:42,826 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 536 predicate places. [2023-08-27 15:09:42,826 INFO L495 AbstractCegarLoop]: Abstraction has has 569 places, 1490 transitions, 38223 flow [2023-08-27 15:09:42,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 88.27272727272727) internal successors, (2913), 33 states have internal predecessors, (2913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:42,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:09:42,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:09:42,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-27 15:09:43,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:09:43,027 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:09:43,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:09:43,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1542795072, now seen corresponding path program 1 times [2023-08-27 15:09:43,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:09:43,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64170228] [2023-08-27 15:09:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:09:43,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:09:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:09:43,596 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 15:09:43,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:09:43,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64170228] [2023-08-27 15:09:43,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64170228] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:09:43,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601794426] [2023-08-27 15:09:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:09:43,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:09:43,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:09:43,597 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:09:43,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-27 15:09:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:09:43,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 15:09:43,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:09:43,979 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 15:09:43,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:09:44,051 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:09:44,051 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 26 [2023-08-27 15:09:44,265 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 15:09:44,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601794426] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:09:44,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:09:44,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2023-08-27 15:09:44,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372666048] [2023-08-27 15:09:44,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:09:44,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 15:09:44,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:09:44,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 15:09:44,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2023-08-27 15:09:44,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 297 [2023-08-27 15:09:44,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 569 places, 1490 transitions, 38223 flow. Second operand has 26 states, 26 states have (on average 83.88461538461539) internal successors, (2181), 26 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:44,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:09:44,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 297 [2023-08-27 15:09:44,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:09:48,138 INFO L124 PetriNetUnfolderBase]: 4150/7483 cut-off events. [2023-08-27 15:09:48,138 INFO L125 PetriNetUnfolderBase]: For 311632/311632 co-relation queries the response was YES. [2023-08-27 15:09:48,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98727 conditions, 7483 events. 4150/7483 cut-off events. For 311632/311632 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 54172 event pairs, 754 based on Foata normal form. 3/7478 useless extension candidates. Maximal degree in co-relation 98581. Up to 7124 conditions per place. [2023-08-27 15:09:48,250 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 1428 selfloop transitions, 68 changer transitions 40/1537 dead transitions. [2023-08-27 15:09:48,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 584 places, 1537 transitions, 41962 flow [2023-08-27 15:09:48,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 15:09:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 15:09:48,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1397 transitions. [2023-08-27 15:09:48,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29398148148148145 [2023-08-27 15:09:48,252 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1397 transitions. [2023-08-27 15:09:48,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1397 transitions. [2023-08-27 15:09:48,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:09:48,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1397 transitions. [2023-08-27 15:09:48,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 87.3125) internal successors, (1397), 16 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:48,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 297.0) internal successors, (5049), 17 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:48,256 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 297.0) internal successors, (5049), 17 states have internal predecessors, (5049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:48,256 INFO L175 Difference]: Start difference. First operand has 569 places, 1490 transitions, 38223 flow. Second operand 16 states and 1397 transitions. [2023-08-27 15:09:48,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 584 places, 1537 transitions, 41962 flow [2023-08-27 15:09:50,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 1537 transitions, 41440 flow, removed 1 selfloop flow, removed 14 redundant places. [2023-08-27 15:09:50,504 INFO L231 Difference]: Finished difference. Result has 572 places, 1470 transitions, 37190 flow [2023-08-27 15:09:50,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=37705, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=37190, PETRI_PLACES=572, PETRI_TRANSITIONS=1470} [2023-08-27 15:09:50,505 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 539 predicate places. [2023-08-27 15:09:50,505 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 1470 transitions, 37190 flow [2023-08-27 15:09:50,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 83.88461538461539) internal successors, (2181), 26 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:50,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:09:50,505 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:09:50,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-27 15:09:50,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:09:50,707 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:09:50,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:09:50,708 INFO L85 PathProgramCache]: Analyzing trace with hash 985950598, now seen corresponding path program 11 times [2023-08-27 15:09:50,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:09:50,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296044650] [2023-08-27 15:09:50,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:09:50,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:09:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:09:51,785 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 15:09:51,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:09:51,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296044650] [2023-08-27 15:09:51,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296044650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:09:51,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213550609] [2023-08-27 15:09:51,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:09:51,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:09:51,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:09:51,787 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:09:51,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-27 15:09:51,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 15:09:51,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:09:51,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 53 conjunts are in the unsatisfiable core [2023-08-27 15:09:51,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:09:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:09:52,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:09:52,667 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:09:52,667 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 95 treesize of output 177 [2023-08-27 15:09:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 15:09:52,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213550609] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:09:52,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:09:52,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 32 [2023-08-27 15:09:52,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206752071] [2023-08-27 15:09:52,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:09:52,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-27 15:09:52,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:09:52,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-27 15:09:52,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2023-08-27 15:09:52,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 297 [2023-08-27 15:09:52,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 1470 transitions, 37190 flow. Second operand has 34 states, 34 states have (on average 92.41176470588235) internal successors, (3142), 34 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:09:52,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:09:52,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 297 [2023-08-27 15:09:52,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:10:08,462 INFO L124 PetriNetUnfolderBase]: 6811/11981 cut-off events. [2023-08-27 15:10:08,463 INFO L125 PetriNetUnfolderBase]: For 516900/516904 co-relation queries the response was YES. [2023-08-27 15:10:08,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160427 conditions, 11981 events. 6811/11981 cut-off events. For 516900/516904 co-relation queries the response was YES. Maximal size of possible extension queue 709. Compared 91235 event pairs, 926 based on Foata normal form. 563/12530 useless extension candidates. Maximal degree in co-relation 160279. Up to 7136 conditions per place. [2023-08-27 15:10:08,645 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 1678 selfloop transitions, 1143 changer transitions 6/2830 dead transitions. [2023-08-27 15:10:08,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 678 places, 2830 transitions, 76090 flow [2023-08-27 15:10:08,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2023-08-27 15:10:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2023-08-27 15:10:08,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 10726 transitions. [2023-08-27 15:10:08,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.325355658688992 [2023-08-27 15:10:08,653 INFO L72 ComplementDD]: Start complementDD. Operand 111 states and 10726 transitions. [2023-08-27 15:10:08,653 INFO L73 IsDeterministic]: Start isDeterministic. Operand 111 states and 10726 transitions. [2023-08-27 15:10:08,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:10:08,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 111 states and 10726 transitions. [2023-08-27 15:10:08,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 112 states, 111 states have (on average 96.63063063063063) internal successors, (10726), 111 states have internal predecessors, (10726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:08,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 112 states, 112 states have (on average 297.0) internal successors, (33264), 112 states have internal predecessors, (33264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:08,688 INFO L81 ComplementDD]: Finished complementDD. Result has 112 states, 112 states have (on average 297.0) internal successors, (33264), 112 states have internal predecessors, (33264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:08,688 INFO L175 Difference]: Start difference. First operand has 572 places, 1470 transitions, 37190 flow. Second operand 111 states and 10726 transitions. [2023-08-27 15:10:08,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 678 places, 2830 transitions, 76090 flow [2023-08-27 15:10:12,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 659 places, 2830 transitions, 75787 flow, removed 58 selfloop flow, removed 19 redundant places. [2023-08-27 15:10:12,698 INFO L231 Difference]: Finished difference. Result has 720 places, 2472 transitions, 68565 flow [2023-08-27 15:10:12,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=37024, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=823, PETRI_DIFFERENCE_SUBTRAHEND_STATES=111, PETRI_FLOW=68565, PETRI_PLACES=720, PETRI_TRANSITIONS=2472} [2023-08-27 15:10:12,699 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 687 predicate places. [2023-08-27 15:10:12,699 INFO L495 AbstractCegarLoop]: Abstraction has has 720 places, 2472 transitions, 68565 flow [2023-08-27 15:10:12,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 92.41176470588235) internal successors, (3142), 34 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:12,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:10:12,700 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:10:12,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-27 15:10:12,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-27 15:10:12,900 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:10:12,900 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:10:12,900 INFO L85 PathProgramCache]: Analyzing trace with hash 647957364, now seen corresponding path program 9 times [2023-08-27 15:10:12,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:10:12,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745053838] [2023-08-27 15:10:12,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:10:12,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:10:12,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:10:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:10:13,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:10:13,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745053838] [2023-08-27 15:10:13,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745053838] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:10:13,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796157086] [2023-08-27 15:10:13,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:10:13,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:13,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:10:13,324 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:10:13,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-27 15:10:13,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 15:10:13,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:10:13,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 15:10:13,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:10:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:10:13,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:10:13,979 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:10:13,979 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2023-08-27 15:10:14,348 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 15:10:14,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796157086] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:10:14,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:10:14,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 35 [2023-08-27 15:10:14,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868585815] [2023-08-27 15:10:14,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:10:14,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-27 15:10:14,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:10:14,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-27 15:10:14,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1082, Unknown=0, NotChecked=0, Total=1332 [2023-08-27 15:10:14,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 297 [2023-08-27 15:10:14,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 720 places, 2472 transitions, 68565 flow. Second operand has 37 states, 37 states have (on average 92.32432432432432) internal successors, (3416), 37 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:14,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:10:14,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 297 [2023-08-27 15:10:14,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:10:24,200 INFO L124 PetriNetUnfolderBase]: 5381/9963 cut-off events. [2023-08-27 15:10:24,200 INFO L125 PetriNetUnfolderBase]: For 470959/470963 co-relation queries the response was YES. [2023-08-27 15:10:24,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136473 conditions, 9963 events. 5381/9963 cut-off events. For 470959/470963 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 77558 event pairs, 1016 based on Foata normal form. 763/10716 useless extension candidates. Maximal degree in co-relation 136266. Up to 6432 conditions per place. [2023-08-27 15:10:24,387 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 1479 selfloop transitions, 675 changer transitions 82/2239 dead transitions. [2023-08-27 15:10:24,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 734 places, 2239 transitions, 64253 flow [2023-08-27 15:10:24,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 15:10:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 15:10:24,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3487 transitions. [2023-08-27 15:10:24,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32613168724279834 [2023-08-27 15:10:24,390 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3487 transitions. [2023-08-27 15:10:24,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3487 transitions. [2023-08-27 15:10:24,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:10:24,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3487 transitions. [2023-08-27 15:10:24,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 96.86111111111111) internal successors, (3487), 36 states have internal predecessors, (3487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:24,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 297.0) internal successors, (10989), 37 states have internal predecessors, (10989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:24,397 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 297.0) internal successors, (10989), 37 states have internal predecessors, (10989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:24,397 INFO L175 Difference]: Start difference. First operand has 720 places, 2472 transitions, 68565 flow. Second operand 36 states and 3487 transitions. [2023-08-27 15:10:24,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 734 places, 2239 transitions, 64253 flow [2023-08-27 15:10:29,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 711 places, 2239 transitions, 61022 flow, removed 1569 selfloop flow, removed 23 redundant places. [2023-08-27 15:10:29,445 INFO L231 Difference]: Finished difference. Result has 732 places, 2054 transitions, 56136 flow [2023-08-27 15:10:29,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=48563, PETRI_DIFFERENCE_MINUEND_PLACES=676, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1890, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=493, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=56136, PETRI_PLACES=732, PETRI_TRANSITIONS=2054} [2023-08-27 15:10:29,447 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 699 predicate places. [2023-08-27 15:10:29,447 INFO L495 AbstractCegarLoop]: Abstraction has has 732 places, 2054 transitions, 56136 flow [2023-08-27 15:10:29,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 92.32432432432432) internal successors, (3416), 37 states have internal predecessors, (3416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:29,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:10:29,448 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:10:29,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-27 15:10:29,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-27 15:10:29,656 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:10:29,656 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:10:29,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1193482714, now seen corresponding path program 2 times [2023-08-27 15:10:29,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:10:29,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282013708] [2023-08-27 15:10:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:10:29,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:10:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:10:30,237 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 15:10:30,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:10:30,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282013708] [2023-08-27 15:10:30,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282013708] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:10:30,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858971870] [2023-08-27 15:10:30,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 15:10:30,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:30,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:10:30,241 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:10:30,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-27 15:10:30,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 15:10:30,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:10:30,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-27 15:10:30,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:10:30,442 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:10:30,480 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:10:30,541 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:10:30,587 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:10:30,711 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 11 treesize of output 3 [2023-08-27 15:10:30,781 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 15:10:30,781 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:10:31,392 INFO L322 Elim1Store]: treesize reduction 32, result has 64.8 percent of original size [2023-08-27 15:10:31,393 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 225 treesize of output 179 [2023-08-27 15:10:31,400 INFO L160 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:10:31,401 INFO L165 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 136 [2023-08-27 15:10:31,438 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:10:31,438 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 929 treesize of output 897 [2023-08-27 15:10:31,472 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:10:31,472 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 401 treesize of output 392 [2023-08-27 15:10:31,496 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:10:31,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 383 treesize of output 356 [2023-08-27 15:10:31,535 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:10:31,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 363 treesize of output 363 [2023-08-27 15:10:31,561 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:10:31,562 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 320 [2023-08-27 15:10:31,588 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:10:31,588 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 311 treesize of output 284 [2023-08-27 15:10:33,278 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-27 15:10:33,331 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 15:10:33,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858971870] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:10:33,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:10:33,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2023-08-27 15:10:33,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950443576] [2023-08-27 15:10:33,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:10:33,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 15:10:33,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:10:33,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 15:10:33,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=616, Unknown=4, NotChecked=0, Total=756 [2023-08-27 15:10:33,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 297 [2023-08-27 15:10:33,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 732 places, 2054 transitions, 56136 flow. Second operand has 28 states, 28 states have (on average 76.75) internal successors, (2149), 28 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:33,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:10:33,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 297 [2023-08-27 15:10:33,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:10:33,698 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (+ (* 4 c_~q_back~0) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse5 (+ (* c_~q_front~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse0 (< c_~n~0 (+ 2 c_~q_back~0))) (.cse1 (< c_~q_back~0 0))) (and (or (< |c_ULTIMATE.start_create_fresh_int_array_~i~1#1| |c_ULTIMATE.start_create_fresh_int_array_~size#1|) .cse0 .cse1 (and (forall ((v_ArrVal_1992 (Array Int Int)) (v_ArrVal_1991 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1991) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1992) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse2 (select .cse3 .cse5))) (or (< (+ c_~s~0 .cse2) 2) (not (= (select .cse3 .cse4) 1)) (= .cse2 0))))) (forall ((v_ArrVal_1992 (Array Int Int)) (v_ArrVal_1991 (Array Int Int))) (let ((.cse7 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1991) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1992) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse6 (select .cse7 .cse5))) (or (< 0 (+ c_~s~0 .cse6)) (not (= (select .cse7 .cse4) 1)) (= .cse6 0))))))) (or (let ((.cse10 (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse11 (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (and (forall ((v_ArrVal_1992 (Array Int Int)) (v_ArrVal_1991 (Array Int Int)) (v_ArrVal_1989 Int)) (let ((.cse9 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse10 .cse11 v_ArrVal_1989)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1991) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1992) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse8 (select .cse9 .cse5))) (or (= .cse8 0) (not (= (select .cse9 .cse4) 1)) (< (+ c_~s~0 .cse8) 2))))) (forall ((v_ArrVal_1992 (Array Int Int)) (v_ArrVal_1991 (Array Int Int)) (v_ArrVal_1989 Int)) (let ((.cse13 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse10 .cse11 v_ArrVal_1989)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1991) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1992) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse12 (select .cse13 .cse5))) (or (= .cse12 0) (not (= (select .cse13 .cse4) 1)) (< 0 (+ c_~s~0 .cse12)))))))) .cse0 .cse1 (< (+ 1 |c_ULTIMATE.start_create_fresh_int_array_~i~1#1|) |c_ULTIMATE.start_create_fresh_int_array_~size#1|)))) is different from false [2023-08-27 15:10:42,053 INFO L124 PetriNetUnfolderBase]: 5384/9962 cut-off events. [2023-08-27 15:10:42,053 INFO L125 PetriNetUnfolderBase]: For 447616/447616 co-relation queries the response was YES. [2023-08-27 15:10:42,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137336 conditions, 9962 events. 5384/9962 cut-off events. For 447616/447616 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 76954 event pairs, 1154 based on Foata normal form. 4/9962 useless extension candidates. Maximal degree in co-relation 137122. Up to 9566 conditions per place. [2023-08-27 15:10:42,263 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 2058 selfloop transitions, 92 changer transitions 38/2189 dead transitions. [2023-08-27 15:10:42,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 757 places, 2189 transitions, 63411 flow [2023-08-27 15:10:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 15:10:42,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 15:10:42,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 2533 transitions. [2023-08-27 15:10:42,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2665193602693603 [2023-08-27 15:10:42,265 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 2533 transitions. [2023-08-27 15:10:42,265 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 2533 transitions. [2023-08-27 15:10:42,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:10:42,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 2533 transitions. [2023-08-27 15:10:42,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 79.15625) internal successors, (2533), 32 states have internal predecessors, (2533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:42,271 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 297.0) internal successors, (9801), 33 states have internal predecessors, (9801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:42,271 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 297.0) internal successors, (9801), 33 states have internal predecessors, (9801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:42,272 INFO L175 Difference]: Start difference. First operand has 732 places, 2054 transitions, 56136 flow. Second operand 32 states and 2533 transitions. [2023-08-27 15:10:42,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 757 places, 2189 transitions, 63411 flow [2023-08-27 15:10:48,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 744 places, 2189 transitions, 61670 flow, removed 812 selfloop flow, removed 13 redundant places. [2023-08-27 15:10:48,288 INFO L231 Difference]: Finished difference. Result has 751 places, 2089 transitions, 55815 flow [2023-08-27 15:10:48,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=54415, PETRI_DIFFERENCE_MINUEND_PLACES=713, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2054, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1972, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=55815, PETRI_PLACES=751, PETRI_TRANSITIONS=2089} [2023-08-27 15:10:48,291 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 718 predicate places. [2023-08-27 15:10:48,291 INFO L495 AbstractCegarLoop]: Abstraction has has 751 places, 2089 transitions, 55815 flow [2023-08-27 15:10:48,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 76.75) internal successors, (2149), 28 states have internal predecessors, (2149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:10:48,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:10:48,291 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:10:48,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-08-27 15:10:48,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-08-27 15:10:48,497 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:10:48,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:10:48,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1022659600, now seen corresponding path program 12 times [2023-08-27 15:10:48,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:10:48,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471009995] [2023-08-27 15:10:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:10:48,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:10:48,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:10:49,670 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 15:10:49,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:10:49,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471009995] [2023-08-27 15:10:49,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471009995] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:10:49,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203257165] [2023-08-27 15:10:49,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:10:49,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:10:49,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:10:49,671 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:10:49,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-27 15:10:49,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 15:10:49,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:10:49,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 79 conjunts are in the unsatisfiable core [2023-08-27 15:10:49,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:10:50,012 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 15:10:50,061 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 15:10:50,113 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:10:50,167 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:10:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:10:50,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:10:51,731 INFO L322 Elim1Store]: treesize reduction 16, result has 65.2 percent of original size [2023-08-27 15:10:51,731 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 294 treesize of output 171 [2023-08-27 15:10:51,954 INFO L322 Elim1Store]: treesize reduction 88, result has 65.5 percent of original size [2023-08-27 15:10:51,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 491 treesize of output 580 [2023-08-27 15:10:52,082 INFO L322 Elim1Store]: treesize reduction 88, result has 51.4 percent of original size [2023-08-27 15:10:52,082 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 405 treesize of output 391 [2023-08-27 15:10:52,224 INFO L322 Elim1Store]: treesize reduction 88, result has 51.4 percent of original size [2023-08-27 15:10:52,224 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 268 treesize of output 307 [2023-08-27 15:11:32,231 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:11:32,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203257165] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:11:32,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:11:32,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 42 [2023-08-27 15:11:32,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562154941] [2023-08-27 15:11:32,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:11:32,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-27 15:11:32,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:11:32,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-27 15:11:32,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=1412, Unknown=4, NotChecked=0, Total=1892 [2023-08-27 15:11:32,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:11:32,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 751 places, 2089 transitions, 55815 flow. Second operand has 44 states, 44 states have (on average 85.1590909090909) internal successors, (3747), 44 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:11:32,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:11:32,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:11:32,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:11:59,895 INFO L124 PetriNetUnfolderBase]: 5484/10298 cut-off events. [2023-08-27 15:11:59,895 INFO L125 PetriNetUnfolderBase]: For 453784/453792 co-relation queries the response was YES. [2023-08-27 15:12:00,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139372 conditions, 10298 events. 5484/10298 cut-off events. For 453784/453792 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 82191 event pairs, 629 based on Foata normal form. 92/10385 useless extension candidates. Maximal degree in co-relation 139153. Up to 6896 conditions per place. [2023-08-27 15:12:00,123 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 1582 selfloop transitions, 780 changer transitions 21/2390 dead transitions. [2023-08-27 15:12:00,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 828 places, 2390 transitions, 67115 flow [2023-08-27 15:12:00,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-08-27 15:12:00,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2023-08-27 15:12:00,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 7751 transitions. [2023-08-27 15:12:00,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2999729091683115 [2023-08-27 15:12:00,128 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 7751 transitions. [2023-08-27 15:12:00,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 7751 transitions. [2023-08-27 15:12:00,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:12:00,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 7751 transitions. [2023-08-27 15:12:00,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 89.0919540229885) internal successors, (7751), 87 states have internal predecessors, (7751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:00,145 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 297.0) internal successors, (26136), 88 states have internal predecessors, (26136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:00,148 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 297.0) internal successors, (26136), 88 states have internal predecessors, (26136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:00,149 INFO L175 Difference]: Start difference. First operand has 751 places, 2089 transitions, 55815 flow. Second operand 87 states and 7751 transitions. [2023-08-27 15:12:00,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 828 places, 2390 transitions, 67115 flow [2023-08-27 15:12:05,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 804 places, 2390 transitions, 66828 flow, removed 102 selfloop flow, removed 24 redundant places. [2023-08-27 15:12:05,454 INFO L231 Difference]: Finished difference. Result has 823 places, 2184 transitions, 60609 flow [2023-08-27 15:12:05,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=53636, PETRI_DIFFERENCE_MINUEND_PLACES=718, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=623, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=60609, PETRI_PLACES=823, PETRI_TRANSITIONS=2184} [2023-08-27 15:12:05,457 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 790 predicate places. [2023-08-27 15:12:05,457 INFO L495 AbstractCegarLoop]: Abstraction has has 823 places, 2184 transitions, 60609 flow [2023-08-27 15:12:05,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 85.1590909090909) internal successors, (3747), 44 states have internal predecessors, (3747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:05,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:12:05,457 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:12:05,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-27 15:12:05,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-08-27 15:12:05,663 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:12:05,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:12:05,663 INFO L85 PathProgramCache]: Analyzing trace with hash 249547318, now seen corresponding path program 3 times [2023-08-27 15:12:05,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:12:05,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057330171] [2023-08-27 15:12:05,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:12:05,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:12:05,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:12:06,166 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 15:12:06,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:12:06,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057330171] [2023-08-27 15:12:06,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057330171] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:12:06,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114798571] [2023-08-27 15:12:06,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 15:12:06,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:12:06,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:12:06,167 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:12:06,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-27 15:12:06,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 15:12:06,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:12:06,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 56 conjunts are in the unsatisfiable core [2023-08-27 15:12:06,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:12:06,362 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-27 15:12:06,396 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:12:06,433 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:12:06,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:12:06,594 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 15:12:06,716 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 15:12:06,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:12:07,260 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:12:07,260 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 75 treesize of output 60 [2023-08-27 15:12:07,270 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:12:07,270 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 108 treesize of output 100 [2023-08-27 15:12:07,281 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:12:07,282 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 57 [2023-08-27 15:12:07,289 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 62 treesize of output 50 [2023-08-27 15:12:07,422 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:12:07,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 60 [2023-08-27 15:12:07,427 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 15:12:07,436 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 15:12:07,437 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 54 [2023-08-27 15:12:07,449 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-27 15:12:07,449 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 32 [2023-08-27 15:12:07,530 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 15:12:07,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114798571] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:12:07,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:12:07,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 27 [2023-08-27 15:12:07,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833987867] [2023-08-27 15:12:07,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:12:07,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 15:12:07,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:12:07,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 15:12:07,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=692, Unknown=9, NotChecked=0, Total=812 [2023-08-27 15:12:07,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 297 [2023-08-27 15:12:07,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 823 places, 2184 transitions, 60609 flow. Second operand has 29 states, 29 states have (on average 76.6896551724138) internal successors, (2224), 29 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:07,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:12:07,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 297 [2023-08-27 15:12:07,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:12:16,309 INFO L124 PetriNetUnfolderBase]: 5470/10291 cut-off events. [2023-08-27 15:12:16,309 INFO L125 PetriNetUnfolderBase]: For 460256/460258 co-relation queries the response was YES. [2023-08-27 15:12:16,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141723 conditions, 10291 events. 5470/10291 cut-off events. For 460256/460258 co-relation queries the response was YES. Maximal size of possible extension queue 659. Compared 82838 event pairs, 1910 based on Foata normal form. 7/10294 useless extension candidates. Maximal degree in co-relation 141488. Up to 10059 conditions per place. [2023-08-27 15:12:16,530 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 2131 selfloop transitions, 49 changer transitions 44/2225 dead transitions. [2023-08-27 15:12:16,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 843 places, 2225 transitions, 65864 flow [2023-08-27 15:12:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 15:12:16,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 15:12:16,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1734 transitions. [2023-08-27 15:12:16,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26538108356290174 [2023-08-27 15:12:16,532 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1734 transitions. [2023-08-27 15:12:16,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1734 transitions. [2023-08-27 15:12:16,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:12:16,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1734 transitions. [2023-08-27 15:12:16,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.81818181818181) internal successors, (1734), 22 states have internal predecessors, (1734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:16,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 297.0) internal successors, (6831), 23 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:16,536 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 297.0) internal successors, (6831), 23 states have internal predecessors, (6831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:16,536 INFO L175 Difference]: Start difference. First operand has 823 places, 2184 transitions, 60609 flow. Second operand 22 states and 1734 transitions. [2023-08-27 15:12:16,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 843 places, 2225 transitions, 65864 flow [2023-08-27 15:12:23,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 816 places, 2225 transitions, 63403 flow, removed 1068 selfloop flow, removed 27 redundant places. [2023-08-27 15:12:23,252 INFO L231 Difference]: Finished difference. Result has 821 places, 2168 transitions, 57743 flow [2023-08-27 15:12:23,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=58153, PETRI_DIFFERENCE_MINUEND_PLACES=795, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=57743, PETRI_PLACES=821, PETRI_TRANSITIONS=2168} [2023-08-27 15:12:23,253 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 788 predicate places. [2023-08-27 15:12:23,253 INFO L495 AbstractCegarLoop]: Abstraction has has 821 places, 2168 transitions, 57743 flow [2023-08-27 15:12:23,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 76.6896551724138) internal successors, (2224), 29 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:23,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:12:23,254 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:12:23,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-27 15:12:23,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-27 15:12:23,454 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:12:23,455 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:12:23,455 INFO L85 PathProgramCache]: Analyzing trace with hash -962331964, now seen corresponding path program 4 times [2023-08-27 15:12:23,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:12:23,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225060927] [2023-08-27 15:12:23,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:12:23,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:12:23,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:12:23,937 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 15:12:23,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:12:23,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225060927] [2023-08-27 15:12:23,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225060927] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:12:23,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114396012] [2023-08-27 15:12:23,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:12:23,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:12:23,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:12:23,939 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:12:23,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-27 15:12:24,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:12:24,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:12:24,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 15:12:24,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:12:24,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:12:24,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 15:12:24,338 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 15:12:24,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:12:24,485 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:12:24,485 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 86 treesize of output 70 [2023-08-27 15:12:24,492 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 57 treesize of output 51 [2023-08-27 15:12:24,495 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 51 treesize of output 45 [2023-08-27 15:12:24,620 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 15:12:24,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114396012] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:12:24,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:12:24,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 24 [2023-08-27 15:12:24,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364289451] [2023-08-27 15:12:24,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:12:24,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 15:12:24,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:12:24,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 15:12:24,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=578, Unknown=1, NotChecked=0, Total=650 [2023-08-27 15:12:24,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 297 [2023-08-27 15:12:24,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 821 places, 2168 transitions, 57743 flow. Second operand has 26 states, 26 states have (on average 79.76923076923077) internal successors, (2074), 26 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:24,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:12:24,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 297 [2023-08-27 15:12:24,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:12:32,303 INFO L124 PetriNetUnfolderBase]: 5434/10165 cut-off events. [2023-08-27 15:12:32,303 INFO L125 PetriNetUnfolderBase]: For 439814/439814 co-relation queries the response was YES. [2023-08-27 15:12:32,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136401 conditions, 10165 events. 5434/10165 cut-off events. For 439814/439814 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 80148 event pairs, 890 based on Foata normal form. 7/10134 useless extension candidates. Maximal degree in co-relation 136165. Up to 9674 conditions per place. [2023-08-27 15:12:32,524 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 2076 selfloop transitions, 96 changer transitions 31/2204 dead transitions. [2023-08-27 15:12:32,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 2204 transitions, 62715 flow [2023-08-27 15:12:32,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 15:12:32,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 15:12:32,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1558 transitions. [2023-08-27 15:12:32,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2760942760942761 [2023-08-27 15:12:32,526 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1558 transitions. [2023-08-27 15:12:32,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1558 transitions. [2023-08-27 15:12:32,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:12:32,527 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1558 transitions. [2023-08-27 15:12:32,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 82.0) internal successors, (1558), 19 states have internal predecessors, (1558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:32,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 297.0) internal successors, (5940), 20 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:32,531 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 297.0) internal successors, (5940), 20 states have internal predecessors, (5940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:32,531 INFO L175 Difference]: Start difference. First operand has 821 places, 2168 transitions, 57743 flow. Second operand 19 states and 1558 transitions. [2023-08-27 15:12:32,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 820 places, 2204 transitions, 62715 flow [2023-08-27 15:12:38,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 789 places, 2204 transitions, 62290 flow, removed 115 selfloop flow, removed 31 redundant places. [2023-08-27 15:12:38,822 INFO L231 Difference]: Finished difference. Result has 792 places, 2149 transitions, 56935 flow [2023-08-27 15:12:38,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=57324, PETRI_DIFFERENCE_MINUEND_PLACES=771, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2072, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=56935, PETRI_PLACES=792, PETRI_TRANSITIONS=2149} [2023-08-27 15:12:38,824 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 759 predicate places. [2023-08-27 15:12:38,824 INFO L495 AbstractCegarLoop]: Abstraction has has 792 places, 2149 transitions, 56935 flow [2023-08-27 15:12:38,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 79.76923076923077) internal successors, (2074), 26 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:38,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:12:38,824 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:12:38,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-27 15:12:39,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:12:39,042 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:12:39,042 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:12:39,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1360351773, now seen corresponding path program 4 times [2023-08-27 15:12:39,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:12:39,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319479092] [2023-08-27 15:12:39,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:12:39,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:12:39,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:12:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:12:39,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:12:39,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319479092] [2023-08-27 15:12:39,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319479092] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:12:39,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591921469] [2023-08-27 15:12:39,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 15:12:39,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:12:39,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:12:39,544 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:12:39,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-27 15:12:39,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 15:12:39,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:12:39,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 15:12:39,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:12:40,054 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 15:12:40,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:12:40,134 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 15:12:40,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2023-08-27 15:12:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:12:40,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591921469] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:12:40,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:12:40,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 39 [2023-08-27 15:12:40,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845923985] [2023-08-27 15:12:40,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:12:40,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-27 15:12:40,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:12:40,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-27 15:12:40,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1386, Unknown=0, NotChecked=0, Total=1640 [2023-08-27 15:12:40,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 297 [2023-08-27 15:12:40,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 2149 transitions, 56935 flow. Second operand has 41 states, 41 states have (on average 92.2439024390244) internal successors, (3782), 41 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:40,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:12:40,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 297 [2023-08-27 15:12:40,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:12:48,400 INFO L124 PetriNetUnfolderBase]: 4991/9325 cut-off events. [2023-08-27 15:12:48,400 INFO L125 PetriNetUnfolderBase]: For 413949/413960 co-relation queries the response was YES. [2023-08-27 15:12:48,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125710 conditions, 9325 events. 4991/9325 cut-off events. For 413949/413960 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 72883 event pairs, 1046 based on Foata normal form. 99/9386 useless extension candidates. Maximal degree in co-relation 125480. Up to 6600 conditions per place. [2023-08-27 15:12:48,594 INFO L140 encePairwiseOnDemand]: 288/297 looper letters, 1592 selfloop transitions, 477 changer transitions 10/2085 dead transitions. [2023-08-27 15:12:48,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 804 places, 2085 transitions, 58898 flow [2023-08-27 15:12:48,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-27 15:12:48,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-27 15:12:48,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3383 transitions. [2023-08-27 15:12:48,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3254449254449254 [2023-08-27 15:12:48,598 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3383 transitions. [2023-08-27 15:12:48,598 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3383 transitions. [2023-08-27 15:12:48,598 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:12:48,598 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3383 transitions. [2023-08-27 15:12:48,601 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 96.65714285714286) internal successors, (3383), 35 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:48,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 297.0) internal successors, (10692), 36 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:48,606 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 297.0) internal successors, (10692), 36 states have internal predecessors, (10692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:48,606 INFO L175 Difference]: Start difference. First operand has 792 places, 2149 transitions, 56935 flow. Second operand 35 states and 3383 transitions. [2023-08-27 15:12:48,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 804 places, 2085 transitions, 58898 flow [2023-08-27 15:12:53,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 778 places, 2085 transitions, 58086 flow, removed 179 selfloop flow, removed 26 redundant places. [2023-08-27 15:12:53,946 INFO L231 Difference]: Finished difference. Result has 780 places, 1981 transitions, 53287 flow [2023-08-27 15:12:53,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=52470, PETRI_DIFFERENCE_MINUEND_PLACES=744, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1986, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=473, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=53287, PETRI_PLACES=780, PETRI_TRANSITIONS=1981} [2023-08-27 15:12:53,947 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 747 predicate places. [2023-08-27 15:12:53,947 INFO L495 AbstractCegarLoop]: Abstraction has has 780 places, 1981 transitions, 53287 flow [2023-08-27 15:12:53,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 92.2439024390244) internal successors, (3782), 41 states have internal predecessors, (3782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:12:53,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:12:53,948 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:12:53,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-27 15:12:54,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:12:54,149 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:12:54,149 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:12:54,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1196502498, now seen corresponding path program 13 times [2023-08-27 15:12:54,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:12:54,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562992728] [2023-08-27 15:12:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:12:54,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:12:54,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:12:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:12:55,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:12:55,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562992728] [2023-08-27 15:12:55,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562992728] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:12:55,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230693139] [2023-08-27 15:12:55,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 15:12:55,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:12:55,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:12:55,246 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:12:55,248 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-27 15:12:55,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:12:55,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 75 conjunts are in the unsatisfiable core [2023-08-27 15:12:55,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:12:55,503 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-27 15:12:55,535 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-08-27 15:12:55,580 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 15:12:55,637 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:12:55,683 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 15:12:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:12:56,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:12:57,158 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:12:57,159 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 367 treesize of output 181 [2023-08-27 15:12:57,260 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:12:57,261 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 1006 treesize of output 1018 [2023-08-27 15:12:57,384 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:12:57,385 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 324 treesize of output 422 [2023-08-27 15:12:57,494 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:12:57,494 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 323 treesize of output 367 [2023-08-27 15:13:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:13:16,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230693139] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:13:16,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:13:16,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 41 [2023-08-27 15:13:16,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489771656] [2023-08-27 15:13:16,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:13:16,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-27 15:13:16,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:13:16,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-27 15:13:16,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1505, Unknown=6, NotChecked=0, Total=1806 [2023-08-27 15:13:16,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:13:16,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 780 places, 1981 transitions, 53287 flow. Second operand has 43 states, 43 states have (on average 85.18604651162791) internal successors, (3663), 43 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:13:16,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:13:16,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:13:16,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:13:30,471 INFO L124 PetriNetUnfolderBase]: 5236/9730 cut-off events. [2023-08-27 15:13:30,471 INFO L125 PetriNetUnfolderBase]: For 426583/426591 co-relation queries the response was YES. [2023-08-27 15:13:30,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130687 conditions, 9730 events. 5236/9730 cut-off events. For 426583/426591 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 76070 event pairs, 912 based on Foata normal form. 18/9690 useless extension candidates. Maximal degree in co-relation 130465. Up to 6816 conditions per place. [2023-08-27 15:13:30,669 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 1559 selfloop transitions, 643 changer transitions 1/2209 dead transitions. [2023-08-27 15:13:30,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 832 places, 2209 transitions, 62208 flow [2023-08-27 15:13:30,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-27 15:13:30,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-27 15:13:30,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 4800 transitions. [2023-08-27 15:13:30,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2992891881780771 [2023-08-27 15:13:30,672 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 4800 transitions. [2023-08-27 15:13:30,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 4800 transitions. [2023-08-27 15:13:30,673 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:13:30,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 4800 transitions. [2023-08-27 15:13:30,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 88.88888888888889) internal successors, (4800), 54 states have internal predecessors, (4800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:13:30,681 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 297.0) internal successors, (16335), 55 states have internal predecessors, (16335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:13:30,682 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 297.0) internal successors, (16335), 55 states have internal predecessors, (16335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:13:30,682 INFO L175 Difference]: Start difference. First operand has 780 places, 1981 transitions, 53287 flow. Second operand 54 states and 4800 transitions. [2023-08-27 15:13:30,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 832 places, 2209 transitions, 62208 flow [2023-08-27 15:13:35,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 818 places, 2209 transitions, 60933 flow, removed 531 selfloop flow, removed 14 redundant places. [2023-08-27 15:13:35,985 INFO L231 Difference]: Finished difference. Result has 824 places, 2038 transitions, 55338 flow [2023-08-27 15:13:35,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=52124, PETRI_DIFFERENCE_MINUEND_PLACES=765, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1981, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=55338, PETRI_PLACES=824, PETRI_TRANSITIONS=2038} [2023-08-27 15:13:35,987 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 791 predicate places. [2023-08-27 15:13:35,987 INFO L495 AbstractCegarLoop]: Abstraction has has 824 places, 2038 transitions, 55338 flow [2023-08-27 15:13:35,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 85.18604651162791) internal successors, (3663), 43 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:13:35,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:13:35,988 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:13:35,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-27 15:13:36,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:13:36,188 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:13:36,188 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:13:36,189 INFO L85 PathProgramCache]: Analyzing trace with hash 858598803, now seen corresponding path program 11 times [2023-08-27 15:13:36,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:13:36,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864535223] [2023-08-27 15:13:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:13:36,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:13:36,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:13:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:13:37,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:13:37,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864535223] [2023-08-27 15:13:37,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864535223] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:13:37,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012352527] [2023-08-27 15:13:37,215 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 15:13:37,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:13:37,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:13:37,218 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:13:37,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-27 15:13:37,387 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 15:13:37,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:13:37,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-27 15:13:37,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:13:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:13:37,906 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:13:38,301 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:13:38,301 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 96 treesize of output 178 [2023-08-27 15:13:38,704 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:13:38,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012352527] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 15:13:38,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 15:13:38,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 40 [2023-08-27 15:13:38,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661337026] [2023-08-27 15:13:38,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 15:13:38,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-08-27 15:13:38,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 15:13:38,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-08-27 15:13:38,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1456, Unknown=0, NotChecked=0, Total=1722 [2023-08-27 15:13:38,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 297 [2023-08-27 15:13:38,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 824 places, 2038 transitions, 55338 flow. Second operand has 42 states, 42 states have (on average 85.21428571428571) internal successors, (3579), 42 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:13:38,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 15:13:38,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 297 [2023-08-27 15:13:38,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 15:13:48,452 INFO L124 PetriNetUnfolderBase]: 5395/10053 cut-off events. [2023-08-27 15:13:48,452 INFO L125 PetriNetUnfolderBase]: For 427282/427290 co-relation queries the response was YES. [2023-08-27 15:13:48,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133911 conditions, 10053 events. 5395/10053 cut-off events. For 427282/427290 co-relation queries the response was YES. Maximal size of possible extension queue 588. Compared 78911 event pairs, 829 based on Foata normal form. 36/10011 useless extension candidates. Maximal degree in co-relation 133685. Up to 8122 conditions per place. [2023-08-27 15:13:48,645 INFO L140 encePairwiseOnDemand]: 287/297 looper letters, 1812 selfloop transitions, 437 changer transitions 0/2255 dead transitions. [2023-08-27 15:13:48,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 876 places, 2255 transitions, 63830 flow [2023-08-27 15:13:48,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-08-27 15:13:48,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-08-27 15:13:48,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 4704 transitions. [2023-08-27 15:13:48,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2988374309129026 [2023-08-27 15:13:48,648 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 4704 transitions. [2023-08-27 15:13:48,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 4704 transitions. [2023-08-27 15:13:48,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 15:13:48,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 4704 transitions. [2023-08-27 15:13:48,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 88.75471698113208) internal successors, (4704), 53 states have internal predecessors, (4704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:13:48,658 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 297.0) internal successors, (16038), 54 states have internal predecessors, (16038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:13:48,659 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 297.0) internal successors, (16038), 54 states have internal predecessors, (16038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:13:48,659 INFO L175 Difference]: Start difference. First operand has 824 places, 2038 transitions, 55338 flow. Second operand 53 states and 4704 transitions. [2023-08-27 15:13:48,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 876 places, 2255 transitions, 63830 flow [2023-08-27 15:13:53,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 843 places, 2255 transitions, 63288 flow, removed 69 selfloop flow, removed 33 redundant places. [2023-08-27 15:13:53,664 INFO L231 Difference]: Finished difference. Result has 851 places, 2069 transitions, 57111 flow [2023-08-27 15:13:53,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=297, PETRI_DIFFERENCE_MINUEND_FLOW=54702, PETRI_DIFFERENCE_MINUEND_PLACES=791, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2033, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=401, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=57111, PETRI_PLACES=851, PETRI_TRANSITIONS=2069} [2023-08-27 15:13:53,665 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 818 predicate places. [2023-08-27 15:13:53,665 INFO L495 AbstractCegarLoop]: Abstraction has has 851 places, 2069 transitions, 57111 flow [2023-08-27 15:13:53,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 85.21428571428571) internal successors, (3579), 42 states have internal predecessors, (3579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 15:13:53,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 15:13:53,666 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:13:53,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-27 15:13:53,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:13:53,873 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 15:13:53,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 15:13:53,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1813289609, now seen corresponding path program 12 times [2023-08-27 15:13:53,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 15:13:53,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94263324] [2023-08-27 15:13:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 15:13:53,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 15:13:53,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 15:13:54,558 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 15:13:54,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 15:13:54,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94263324] [2023-08-27 15:13:54,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94263324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 15:13:54,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997123969] [2023-08-27 15:13:54,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 15:13:54,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 15:13:54,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 15:13:54,560 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 15:13:54,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-27 15:13:54,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 15:13:54,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 15:13:54,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 76 conjunts are in the unsatisfiable core [2023-08-27 15:13:54,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 15:13:54,862 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 15:13:54,908 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 15:13:54,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:13:54,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 15:13:55,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 15:13:55,171 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 38 treesize of output 36 [2023-08-27 15:13:55,619 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 15:13:55,620 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 15:13:57,589 INFO L322 Elim1Store]: treesize reduction 32, result has 64.8 percent of original size [2023-08-27 15:13:57,590 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 686 treesize of output 412 [2023-08-27 15:13:57,611 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1109 treesize of output 1060 [2023-08-27 15:13:57,755 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:13:57,756 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 632 treesize of output 708 [2023-08-27 15:13:58,086 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:13:58,087 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 30 case distinctions, treesize of input 583 treesize of output 782 [2023-08-27 15:13:58,185 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:13:58,186 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 496 treesize of output 459 [2023-08-27 15:13:58,469 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:13:58,470 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 1035 treesize of output 1174 [2023-08-27 15:13:58,729 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:13:58,730 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 576 treesize of output 664 [2023-08-27 15:13:58,882 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 15:13:58,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 523 treesize of output 510 Received shutdown request... [2023-08-27 15:14:31,813 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 15:14:31,814 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 15:14:31,826 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 25 remaining) [2023-08-27 15:14:31,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-27 15:14:32,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-08-27 15:14:32,034 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. [2023-08-27 15:14:32,035 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 25 remaining) [2023-08-27 15:14:32,035 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 25 remaining) [2023-08-27 15:14:32,036 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 25 remaining) [2023-08-27 15:14:32,036 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 25 remaining) [2023-08-27 15:14:32,036 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 25 remaining) [2023-08-27 15:14:32,036 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 25 remaining) [2023-08-27 15:14:32,036 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 25 remaining) [2023-08-27 15:14:32,036 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 25 remaining) [2023-08-27 15:14:32,037 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 25 remaining) [2023-08-27 15:14:32,037 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 25 remaining) [2023-08-27 15:14:32,037 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 25 remaining) [2023-08-27 15:14:32,037 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 25 remaining) [2023-08-27 15:14:32,037 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (11 of 25 remaining) [2023-08-27 15:14:32,037 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 25 remaining) [2023-08-27 15:14:32,038 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 25 remaining) [2023-08-27 15:14:32,038 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 25 remaining) [2023-08-27 15:14:32,038 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 25 remaining) [2023-08-27 15:14:32,038 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 25 remaining) [2023-08-27 15:14:32,038 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 25 remaining) [2023-08-27 15:14:32,038 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 25 remaining) [2023-08-27 15:14:32,039 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 25 remaining) [2023-08-27 15:14:32,039 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 25 remaining) [2023-08-27 15:14:32,039 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 25 remaining) [2023-08-27 15:14:32,039 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 25 remaining) [2023-08-27 15:14:32,039 INFO L445 BasicCegarLoop]: Path program histogram: [13, 12, 9, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 15:14:32,046 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 15:14:32,046 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 15:14:32,048 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 03:14:32 BasicIcfg [2023-08-27 15:14:32,048 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 15:14:32,048 INFO L158 Benchmark]: Toolchain (without parser) took 781305.31ms. Allocated memory was 377.5MB in the beginning and 8.4GB in the end (delta: 8.0GB). Free memory was 334.6MB in the beginning and 6.0GB in the end (delta: -5.7GB). Peak memory consumption was 3.9GB. Max. memory is 16.0GB. [2023-08-27 15:14:32,049 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 377.5MB. Free memory was 355.5MB in the beginning and 355.3MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 15:14:32,049 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.19ms. Allocated memory is still 377.5MB. Free memory was 333.5MB in the beginning and 323.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 15:14:32,049 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.28ms. Allocated memory is still 377.5MB. Free memory was 323.0MB in the beginning and 320.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 15:14:32,049 INFO L158 Benchmark]: Boogie Preprocessor took 51.02ms. Allocated memory is still 377.5MB. Free memory was 320.9MB in the beginning and 318.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 15:14:32,050 INFO L158 Benchmark]: RCFGBuilder took 648.54ms. Allocated memory is still 377.5MB. Free memory was 318.8MB in the beginning and 287.4MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. [2023-08-27 15:14:32,050 INFO L158 Benchmark]: TraceAbstraction took 780300.81ms. Allocated memory was 377.5MB in the beginning and 8.4GB in the end (delta: 8.0GB). Free memory was 286.3MB in the beginning and 6.0GB in the end (delta: -5.7GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. [2023-08-27 15:14:32,052 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 377.5MB. Free memory was 355.5MB in the beginning and 355.3MB in the end (delta: 157.3kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 241.19ms. Allocated memory is still 377.5MB. Free memory was 333.5MB in the beginning and 323.0MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 56.28ms. Allocated memory is still 377.5MB. Free memory was 323.0MB in the beginning and 320.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 51.02ms. Allocated memory is still 377.5MB. Free memory was 320.9MB in the beginning and 318.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 648.54ms. Allocated memory is still 377.5MB. Free memory was 318.8MB in the beginning and 287.4MB in the end (delta: 31.5MB). Peak memory consumption was 31.5MB. Max. memory is 16.0GB. * TraceAbstraction took 780300.81ms. Allocated memory was 377.5MB in the beginning and 8.4GB in the end (delta: 8.0GB). Free memory was 286.3MB in the beginning and 6.0GB in the end (delta: -5.7GB). Peak memory consumption was 3.8GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.4s, 134 PlacesBefore, 33 PlacesAfterwards, 138 TransitionsBefore, 29 TransitionsAfterwards, 1192 CoEnabledTransitionPairs, 7 FixpointIterations, 82 TrivialSequentialCompositions, 37 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 7 ConcurrentYvCompositions, 8 ChoiceCompositions, 148 TotalNumberOfCompositions, 1644 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1364, independent: 1338, independent conditional: 0, independent unconditional: 1338, dependent: 26, dependent conditional: 0, dependent unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 683, independent: 671, independent conditional: 0, independent unconditional: 671, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1364, independent: 667, independent conditional: 0, independent unconditional: 667, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 683, unknown conditional: 0, unknown unconditional: 683] , Statistics on independence cache: Total cache size (in pairs): 43, Positive cache size: 40, Positive conditional cache size: 0, Positive unconditional cache size: 40, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. - TimeoutResultAtElement [Line: 51]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. - TimeoutResultAtElement [Line: 69]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. - TimeoutResultAtElement [Line: 71]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. - TimeoutResultAtElement [Line: 108]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. - TimeoutResultAtElement [Line: 93]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. - TimeoutResultAtElement [Line: 92]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was analyzing trace of length 20 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ∨-11-1 term,while PolyPacSimplificationTermWalker was simplifying 11 xjuncts wrt. a ∧-106-14-3-13-2-11-2-13-3-12-3-12-2-11-3-2-2-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 174 locations, 25 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: 780.2s, OverallIterations: 65, TraceHistogramMax: 5, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.0s, AutomataDifference: 569.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.5s, HoareTripleCheckerStatistics: 478 mSolverCounterUnknown, 7535 SdHoareTripleChecker+Valid, 126.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7535 mSDsluCounter, 59 SdHoareTripleChecker+Invalid, 121.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1970 IncrementalHoareTripleChecker+Unchecked, 50 mSDsCounter, 3477 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 48581 IncrementalHoareTripleChecker+Invalid, 54506 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3477 mSolverCounterUnsat, 9 mSDtfsCounter, 48581 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3069 GetRequests, 747 SyntacticMatches, 15 SemanticMatches, 2307 ConstructedPredicates, 14 IntricatePredicates, 1 DeprecatedPredicates, 27407 ImplicationChecksByTransitivity, 191.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75755occurred in iteration=42, InterpolantAutomatonStates: 1558, 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: 0.7s SsaConstructionTime, 2.8s SatisfiabilityAnalysisTime, 146.8s InterpolantComputationTime, 1687 NumberOfCodeBlocks, 1661 NumberOfCodeBlocksAsserted, 163 NumberOfCheckSat, 2271 ConstructedInterpolants, 155 QuantifiedInterpolants, 53931 SizeOfPredicates, 579 NumberOfNonLiveVariables, 12037 ConjunctsInSsa, 1798 ConjunctsInUnsatCore, 170 InterpolantComputations, 17 PerfectInterpolantSequences, 416/1695 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