/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 01:26:43,370 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 01:26:43,432 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 01:26:43,435 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 01:26:43,436 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 01:26:43,461 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 01:26:43,462 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 01:26:43,468 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 01:26:43,469 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 01:26:43,472 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 01:26:43,472 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 01:26:43,472 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 01:26:43,472 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 01:26:43,473 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 01:26:43,473 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 01:26:43,473 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 01:26:43,474 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 01:26:43,474 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 01:26:43,474 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 01:26:43,474 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 01:26:43,474 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 01:26:43,474 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 01:26:43,475 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 01:26:43,475 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 01:26:43,475 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 01:26:43,475 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 01:26:43,475 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 01:26:43,476 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 01:26:43,476 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 01:26:43,476 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 01:26:43,477 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 01:26:43,477 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 01:26:43,477 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 01:26:43,477 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 01:26:43,477 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 01:26:43,477 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 01:26:43,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 01:26:43,734 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 01:26:43,736 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 01:26:43,737 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 01:26:43,738 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 01:26:43,739 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-08-27 01:26:44,729 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 01:26:44,903 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 01:26:44,904 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-queue-add-2-nl.wvr.c [2023-08-27 01:26:44,911 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfe9132d9/55060d209a1e4e6e9e776f5d422c5e41/FLAGd465c728e [2023-08-27 01:26:44,928 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dfe9132d9/55060d209a1e4e6e9e776f5d422c5e41 [2023-08-27 01:26:44,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 01:26:44,933 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 01:26:44,936 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 01:26:44,936 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 01:26:44,938 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 01:26:44,939 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:26:44" (1/1) ... [2023-08-27 01:26:44,940 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bf59536 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:44, skipping insertion in model container [2023-08-27 01:26:44,940 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 01:26:44" (1/1) ... [2023-08-27 01:26:44,961 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 01:26:45,119 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 01:26:45,127 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 01:26:45,166 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 01:26:45,172 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 01:26:45,172 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 01:26:45,177 INFO L206 MainTranslator]: Completed translation [2023-08-27 01:26:45,178 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:45 WrapperNode [2023-08-27 01:26:45,178 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 01:26:45,179 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 01:26:45,179 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 01:26:45,179 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 01:26:45,183 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:45" (1/1) ... [2023-08-27 01:26:45,197 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:45" (1/1) ... [2023-08-27 01:26:45,224 INFO L138 Inliner]: procedures = 25, calls = 40, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 184 [2023-08-27 01:26:45,225 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 01:26:45,226 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 01:26:45,226 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 01:26:45,226 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 01:26:45,232 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:45" (1/1) ... [2023-08-27 01:26:45,232 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:45" (1/1) ... [2023-08-27 01:26:45,241 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:45" (1/1) ... [2023-08-27 01:26:45,242 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:45" (1/1) ... [2023-08-27 01:26:45,253 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:45" (1/1) ... [2023-08-27 01:26:45,256 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:45" (1/1) ... [2023-08-27 01:26:45,257 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:45" (1/1) ... [2023-08-27 01:26:45,258 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:45" (1/1) ... [2023-08-27 01:26:45,259 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 01:26:45,260 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 01:26:45,260 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 01:26:45,260 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 01:26:45,261 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:45" (1/1) ... [2023-08-27 01:26:45,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 01:26:45,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:45,308 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-27 01:26:45,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-27 01:26:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 01:26:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 01:26:45,363 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 01:26:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 01:26:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 01:26:45,364 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 01:26:45,364 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 01:26:45,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 01:26:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 01:26:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 01:26:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 01:26:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 01:26:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 01:26:45,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 01:26:45,365 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 01:26:45,366 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 01:26:45,460 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 01:26:45,461 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 01:26:45,744 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 01:26:45,829 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 01:26:45,829 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 01:26:45,831 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:26:45 BoogieIcfgContainer [2023-08-27 01:26:45,831 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 01:26:45,833 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 01:26:45,833 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 01:26:45,835 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 01:26:45,835 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 01:26:44" (1/3) ... [2023-08-27 01:26:45,836 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f39b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:26:45, skipping insertion in model container [2023-08-27 01:26:45,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 01:26:45" (2/3) ... [2023-08-27 01:26:45,836 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21f39b5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 01:26:45, skipping insertion in model container [2023-08-27 01:26:45,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 01:26:45" (3/3) ... [2023-08-27 01:26:45,837 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-queue-add-2-nl.wvr.c [2023-08-27 01:26:45,849 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 01:26:45,849 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-27 01:26:45,849 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 01:26:45,891 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 01:26:45,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 159 transitions, 334 flow [2023-08-27 01:26:45,969 INFO L124 PetriNetUnfolderBase]: 11/157 cut-off events. [2023-08-27 01:26:45,969 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 01:26:45,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 157 events. 11/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 162 event pairs, 0 based on Foata normal form. 0/133 useless extension candidates. Maximal degree in co-relation 115. Up to 3 conditions per place. [2023-08-27 01:26:45,973 INFO L82 GeneralOperation]: Start removeDead. Operand has 155 places, 159 transitions, 334 flow [2023-08-27 01:26:45,976 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 148 transitions, 308 flow [2023-08-27 01:26:45,979 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 01:26:45,984 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 148 transitions, 308 flow [2023-08-27 01:26:45,986 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 148 transitions, 308 flow [2023-08-27 01:26:45,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 148 transitions, 308 flow [2023-08-27 01:26:46,009 INFO L124 PetriNetUnfolderBase]: 11/148 cut-off events. [2023-08-27 01:26:46,009 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 01:26:46,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157 conditions, 148 events. 11/148 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 160 event pairs, 0 based on Foata normal form. 0/125 useless extension candidates. Maximal degree in co-relation 115. Up to 3 conditions per place. [2023-08-27 01:26:46,011 INFO L119 LiptonReduction]: Number of co-enabled transitions 1404 [2023-08-27 01:26:51,020 INFO L134 LiptonReduction]: Checked pairs total: 1888 [2023-08-27 01:26:51,020 INFO L136 LiptonReduction]: Total number of compositions: 158 [2023-08-27 01:26:51,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 01:26:51,034 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;@2a70a0f5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 01:26:51,034 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2023-08-27 01:26:51,036 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 01:26:51,036 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 01:26:51,036 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 01:26:51,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:51,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 01:26:51,036 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 01:26:51,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:51,040 INFO L85 PathProgramCache]: Analyzing trace with hash 23272, now seen corresponding path program 1 times [2023-08-27 01:26:51,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:51,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819747941] [2023-08-27 01:26:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:51,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:51,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:51,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:51,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819747941] [2023-08-27 01:26:51,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819747941] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:51,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:26:51,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 01:26:51,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588640304] [2023-08-27 01:26:51,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:51,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:26:51,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:51,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:26:51,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:26:51,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 317 [2023-08-27 01:26:51,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:51,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 317 [2023-08-27 01:26:51,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:51,334 INFO L124 PetriNetUnfolderBase]: 218/333 cut-off events. [2023-08-27 01:26:51,334 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2023-08-27 01:26:51,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 692 conditions, 333 events. 218/333 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1261 event pairs, 122 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 617. Up to 330 conditions per place. [2023-08-27 01:26:51,337 INFO L140 encePairwiseOnDemand]: 311/317 looper letters, 22 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2023-08-27 01:26:51,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 110 flow [2023-08-27 01:26:51,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:26:51,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:26:51,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-27 01:26:51,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363827549947424 [2023-08-27 01:26:51,348 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-27 01:26:51,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-27 01:26:51,350 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:51,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-27 01:26:51,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,365 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,366 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 70 flow. Second operand 3 states and 415 transitions. [2023-08-27 01:26:51,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 110 flow [2023-08-27 01:26:51,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 25 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 01:26:51,369 INFO L231 Difference]: Finished difference. Result has 27 places, 25 transitions, 58 flow [2023-08-27 01:26:51,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2023-08-27 01:26:51,373 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -6 predicate places. [2023-08-27 01:26:51,373 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 58 flow [2023-08-27 01:26:51,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:51,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 01:26:51,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 01:26:51,374 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:26:51,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:51,374 INFO L85 PathProgramCache]: Analyzing trace with hash 23279, now seen corresponding path program 1 times [2023-08-27 01:26:51,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:51,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818389933] [2023-08-27 01:26:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:51,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:51,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:51,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:51,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:51,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818389933] [2023-08-27 01:26:51,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818389933] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:51,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:26:51,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 01:26:51,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906936094] [2023-08-27 01:26:51,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:51,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:26:51,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:51,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:26:51,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:26:51,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 317 [2023-08-27 01:26:51,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 58 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:51,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 317 [2023-08-27 01:26:51,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:51,486 INFO L124 PetriNetUnfolderBase]: 219/335 cut-off events. [2023-08-27 01:26:51,486 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 01:26:51,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 683 conditions, 335 events. 219/335 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1262 event pairs, 122 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 665. Up to 334 conditions per place. [2023-08-27 01:26:51,491 INFO L140 encePairwiseOnDemand]: 313/317 looper letters, 23 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-08-27 01:26:51,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 116 flow [2023-08-27 01:26:51,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:26:51,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:26:51,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-27 01:26:51,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4353312302839117 [2023-08-27 01:26:51,496 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-27 01:26:51,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-27 01:26:51,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:51,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-27 01:26:51,497 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,499 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,500 INFO L175 Difference]: Start difference. First operand has 27 places, 25 transitions, 58 flow. Second operand 3 states and 414 transitions. [2023-08-27 01:26:51,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 116 flow [2023-08-27 01:26:51,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 110 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 01:26:51,503 INFO L231 Difference]: Finished difference. Result has 28 places, 27 transitions, 73 flow [2023-08-27 01:26:51,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=28, PETRI_TRANSITIONS=27} [2023-08-27 01:26:51,504 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -5 predicate places. [2023-08-27 01:26:51,504 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 27 transitions, 73 flow [2023-08-27 01:26:51,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:51,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 01:26:51,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 01:26:51,508 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 01:26:51,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:51,511 INFO L85 PathProgramCache]: Analyzing trace with hash 722701, now seen corresponding path program 1 times [2023-08-27 01:26:51,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:51,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749261580] [2023-08-27 01:26:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:51,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:51,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:51,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:51,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749261580] [2023-08-27 01:26:51,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749261580] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:51,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133189451] [2023-08-27 01:26:51,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:51,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:51,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:51,561 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:51,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 01:26:51,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:51,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:26:51,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:51,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:51,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133189451] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:51,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:51,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-08-27 01:26:51,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916394822] [2023-08-27 01:26:51,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:51,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 01:26:51,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:51,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 01:26:51,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-27 01:26:51,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 129 out of 317 [2023-08-27 01:26:51,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 27 transitions, 73 flow. Second operand has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:51,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 129 of 317 [2023-08-27 01:26:51,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:51,792 INFO L124 PetriNetUnfolderBase]: 222/341 cut-off events. [2023-08-27 01:26:51,792 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-27 01:26:51,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 707 conditions, 341 events. 222/341 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 1289 event pairs, 122 based on Foata normal form. 0/136 useless extension candidates. Maximal degree in co-relation 665. Up to 337 conditions per place. [2023-08-27 01:26:51,794 INFO L140 encePairwiseOnDemand]: 313/317 looper letters, 23 selfloop transitions, 9 changer transitions 0/33 dead transitions. [2023-08-27 01:26:51,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 33 transitions, 161 flow [2023-08-27 01:26:51,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:26:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:26:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 809 transitions. [2023-08-27 01:26:51,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42534174553102 [2023-08-27 01:26:51,796 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 809 transitions. [2023-08-27 01:26:51,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 809 transitions. [2023-08-27 01:26:51,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:51,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 809 transitions. [2023-08-27 01:26:51,798 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 134.83333333333334) internal successors, (809), 6 states have internal predecessors, (809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,802 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,802 INFO L175 Difference]: Start difference. First operand has 28 places, 27 transitions, 73 flow. Second operand 6 states and 809 transitions. [2023-08-27 01:26:51,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 33 transitions, 161 flow [2023-08-27 01:26:51,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 33 transitions, 156 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 01:26:51,804 INFO L231 Difference]: Finished difference. Result has 35 places, 33 transitions, 129 flow [2023-08-27 01:26:51,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, 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 01:26:51,805 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-08-27 01:26:51,805 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 33 transitions, 129 flow [2023-08-27 01:26:51,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 130.0) internal successors, (780), 6 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:51,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:51,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 01:26:51,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 01:26:52,010 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 01:26:52,013 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:26:52,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:52,014 INFO L85 PathProgramCache]: Analyzing trace with hash 694512457, now seen corresponding path program 1 times [2023-08-27 01:26:52,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:52,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44459353] [2023-08-27 01:26:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:52,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:52,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:52,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44459353] [2023-08-27 01:26:52,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44459353] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:52,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:26:52,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:26:52,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105496312] [2023-08-27 01:26:52,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:52,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:26:52,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:52,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:26:52,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:26:52,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 317 [2023-08-27 01:26:52,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 33 transitions, 129 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:52,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 317 [2023-08-27 01:26:52,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:52,175 INFO L124 PetriNetUnfolderBase]: 226/373 cut-off events. [2023-08-27 01:26:52,175 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-27 01:26:52,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 373 events. 226/373 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1396 event pairs, 123 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 758. Up to 306 conditions per place. [2023-08-27 01:26:52,177 INFO L140 encePairwiseOnDemand]: 311/317 looper letters, 42 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-08-27 01:26:52,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 46 transitions, 248 flow [2023-08-27 01:26:52,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:26:52,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:26:52,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 433 transitions. [2023-08-27 01:26:52,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45531019978969506 [2023-08-27 01:26:52,178 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 433 transitions. [2023-08-27 01:26:52,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 433 transitions. [2023-08-27 01:26:52,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:52,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 433 transitions. [2023-08-27 01:26:52,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,182 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,182 INFO L175 Difference]: Start difference. First operand has 35 places, 33 transitions, 129 flow. Second operand 3 states and 433 transitions. [2023-08-27 01:26:52,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 46 transitions, 248 flow [2023-08-27 01:26:52,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 227 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 01:26:52,184 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 136 flow [2023-08-27 01:26:52,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2023-08-27 01:26:52,185 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-08-27 01:26:52,185 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 136 flow [2023-08-27 01:26:52,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:52,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 01:26:52,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 01:26:52,186 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:26:52,187 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:52,187 INFO L85 PathProgramCache]: Analyzing trace with hash 694512376, now seen corresponding path program 1 times [2023-08-27 01:26:52,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:52,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225097005] [2023-08-27 01:26:52,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:52,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:52,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:52,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:52,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:52,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225097005] [2023-08-27 01:26:52,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225097005] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:52,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:26:52,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:26:52,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016080827] [2023-08-27 01:26:52,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:52,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:26:52,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:52,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:26:52,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-27 01:26:52,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 317 [2023-08-27 01:26:52,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:52,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 317 [2023-08-27 01:26:52,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:52,356 INFO L124 PetriNetUnfolderBase]: 206/348 cut-off events. [2023-08-27 01:26:52,357 INFO L125 PetriNetUnfolderBase]: For 43/60 co-relation queries the response was YES. [2023-08-27 01:26:52,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 891 conditions, 348 events. 206/348 cut-off events. For 43/60 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1365 event pairs, 142 based on Foata normal form. 29/220 useless extension candidates. Maximal degree in co-relation 858. Up to 338 conditions per place. [2023-08-27 01:26:52,359 INFO L140 encePairwiseOnDemand]: 305/317 looper letters, 32 selfloop transitions, 2 changer transitions 6/41 dead transitions. [2023-08-27 01:26:52,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 41 transitions, 228 flow [2023-08-27 01:26:52,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:26:52,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:26:52,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 528 transitions. [2023-08-27 01:26:52,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.416403785488959 [2023-08-27 01:26:52,361 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 528 transitions. [2023-08-27 01:26:52,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 528 transitions. [2023-08-27 01:26:52,361 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:52,361 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 528 transitions. [2023-08-27 01:26:52,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 132.0) internal successors, (528), 4 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,365 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,365 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 136 flow. Second operand 4 states and 528 transitions. [2023-08-27 01:26:52,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 41 transitions, 228 flow [2023-08-27 01:26:52,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 41 transitions, 224 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:26:52,369 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 149 flow [2023-08-27 01:26:52,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-27 01:26:52,372 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-27 01:26:52,372 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 149 flow [2023-08-27 01:26:52,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.0) internal successors, (492), 4 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:52,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 01:26:52,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 01:26:52,374 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:26:52,374 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:52,374 INFO L85 PathProgramCache]: Analyzing trace with hash 56156698, now seen corresponding path program 1 times [2023-08-27 01:26:52,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:52,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470977395] [2023-08-27 01:26:52,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:52,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:52,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470977395] [2023-08-27 01:26:52,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470977395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:52,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080819878] [2023-08-27 01:26:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:52,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:52,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:52,470 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:52,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 01:26:52,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:52,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:26:52,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:26:52,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:26:52,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080819878] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:52,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:26:52,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [3] total 4 [2023-08-27 01:26:52,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520573954] [2023-08-27 01:26:52,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:52,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:26:52,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:52,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:26:52,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-27 01:26:52,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 317 [2023-08-27 01:26:52,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:52,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 317 [2023-08-27 01:26:52,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:52,604 INFO L124 PetriNetUnfolderBase]: 112/192 cut-off events. [2023-08-27 01:26:52,604 INFO L125 PetriNetUnfolderBase]: For 61/72 co-relation queries the response was YES. [2023-08-27 01:26:52,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565 conditions, 192 events. 112/192 cut-off events. For 61/72 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 594 event pairs, 72 based on Foata normal form. 35/142 useless extension candidates. Maximal degree in co-relation 547. Up to 191 conditions per place. [2023-08-27 01:26:52,607 INFO L140 encePairwiseOnDemand]: 313/317 looper letters, 29 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-27 01:26:52,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 31 transitions, 191 flow [2023-08-27 01:26:52,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:26:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:26:52,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 426 transitions. [2023-08-27 01:26:52,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479495268138801 [2023-08-27 01:26:52,608 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 426 transitions. [2023-08-27 01:26:52,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 426 transitions. [2023-08-27 01:26:52,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:52,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 426 transitions. [2023-08-27 01:26:52,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.0) internal successors, (426), 3 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,611 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,611 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,611 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 149 flow. Second operand 3 states and 426 transitions. [2023-08-27 01:26:52,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 31 transitions, 191 flow [2023-08-27 01:26:52,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 31 transitions, 185 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-27 01:26:52,613 INFO L231 Difference]: Finished difference. Result has 36 places, 31 transitions, 127 flow [2023-08-27 01:26:52,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=34, 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=127, PETRI_PLACES=36, PETRI_TRANSITIONS=31} [2023-08-27 01:26:52,615 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 3 predicate places. [2023-08-27 01:26:52,615 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 31 transitions, 127 flow [2023-08-27 01:26:52,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:52,616 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 01:26:52,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:52,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-08-27 01:26:52,817 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:26:52,818 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:52,818 INFO L85 PathProgramCache]: Analyzing trace with hash 56193647, now seen corresponding path program 2 times [2023-08-27 01:26:52,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:52,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581530874] [2023-08-27 01:26:52,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:52,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:52,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:52,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581530874] [2023-08-27 01:26:52,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581530874] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:52,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241930457] [2023-08-27 01:26:52,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:26:52,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:52,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:52,902 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:52,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 01:26:52,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:26:52,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:26:52,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 01:26:52,978 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 01:26:52,990 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:26:52,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241930457] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:52,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:26:52,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 01:26:52,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011710853] [2023-08-27 01:26:52,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:52,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:26:52,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:52,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:26:52,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 01:26:52,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 317 [2023-08-27 01:26:52,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 31 transitions, 127 flow. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:52,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:52,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 317 [2023-08-27 01:26:52,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:53,030 INFO L124 PetriNetUnfolderBase]: 112/191 cut-off events. [2023-08-27 01:26:53,030 INFO L125 PetriNetUnfolderBase]: For 56/67 co-relation queries the response was YES. [2023-08-27 01:26:53,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 191 events. 112/191 cut-off events. For 56/67 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 587 event pairs, 72 based on Foata normal form. 12/130 useless extension candidates. Maximal degree in co-relation 532. Up to 190 conditions per place. [2023-08-27 01:26:53,031 INFO L140 encePairwiseOnDemand]: 315/317 looper letters, 28 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-27 01:26:53,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 175 flow [2023-08-27 01:26:53,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:26:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:26:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-08-27 01:26:53,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43217665615141954 [2023-08-27 01:26:53,032 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-08-27 01:26:53,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-08-27 01:26:53,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:53,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-08-27 01:26:53,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,035 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,035 INFO L175 Difference]: Start difference. First operand has 36 places, 31 transitions, 127 flow. Second operand 3 states and 411 transitions. [2023-08-27 01:26:53,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 175 flow [2023-08-27 01:26:53,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 30 transitions, 159 flow, removed 2 selfloop flow, removed 5 redundant places. [2023-08-27 01:26:53,036 INFO L231 Difference]: Finished difference. Result has 32 places, 30 transitions, 103 flow [2023-08-27 01:26:53,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=101, 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=103, PETRI_PLACES=32, PETRI_TRANSITIONS=30} [2023-08-27 01:26:53,037 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-27 01:26:53,037 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 30 transitions, 103 flow [2023-08-27 01:26:53,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:53,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:53,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:53,242 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 01:26:53,242 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:26:53,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:53,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1740861068, now seen corresponding path program 1 times [2023-08-27 01:26:53,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:53,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48755082] [2023-08-27 01:26:53,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:53,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:53,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:53,279 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 01:26:53,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:53,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48755082] [2023-08-27 01:26:53,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48755082] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:53,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:26:53,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:26:53,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786427673] [2023-08-27 01:26:53,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:53,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:26:53,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:53,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:26:53,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:26:53,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 317 [2023-08-27 01:26:53,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 30 transitions, 103 flow. Second operand has 3 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 01:26:53,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:53,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 317 [2023-08-27 01:26:53,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:53,330 INFO L124 PetriNetUnfolderBase]: 112/190 cut-off events. [2023-08-27 01:26:53,331 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2023-08-27 01:26:53,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 532 conditions, 190 events. 112/190 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 591 event pairs, 27 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 521. Up to 99 conditions per place. [2023-08-27 01:26:53,332 INFO L140 encePairwiseOnDemand]: 314/317 looper letters, 34 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2023-08-27 01:26:53,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 37 transitions, 198 flow [2023-08-27 01:26:53,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:26:53,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:26:53,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 422 transitions. [2023-08-27 01:26:53,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4437434279705573 [2023-08-27 01:26:53,333 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 422 transitions. [2023-08-27 01:26:53,333 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 422 transitions. [2023-08-27 01:26:53,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:53,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 422 transitions. [2023-08-27 01:26:53,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,335 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,335 INFO L175 Difference]: Start difference. First operand has 32 places, 30 transitions, 103 flow. Second operand 3 states and 422 transitions. [2023-08-27 01:26:53,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 37 transitions, 198 flow [2023-08-27 01:26:53,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 37 transitions, 197 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:26:53,337 INFO L231 Difference]: Finished difference. Result has 32 places, 29 transitions, 104 flow [2023-08-27 01:26:53,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=98, 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=104, PETRI_PLACES=32, PETRI_TRANSITIONS=29} [2023-08-27 01:26:53,338 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -1 predicate places. [2023-08-27 01:26:53,338 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 29 transitions, 104 flow [2023-08-27 01:26:53,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 01:26:53,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:53,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:53,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 01:26:53,340 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:26:53,340 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:53,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1740861069, now seen corresponding path program 1 times [2023-08-27 01:26:53,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:53,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755119490] [2023-08-27 01:26:53,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:53,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:26:53,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:53,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755119490] [2023-08-27 01:26:53,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755119490] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:53,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613959693] [2023-08-27 01:26:53,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:53,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:53,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:53,397 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:53,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 01:26:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:53,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:26:53,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:26:53,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:53,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:26:53,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613959693] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:53,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:53,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-27 01:26:53,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885277721] [2023-08-27 01:26:53,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:53,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 01:26:53,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:53,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 01:26:53,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 01:26:53,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 317 [2023-08-27 01:26:53,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 29 transitions, 104 flow. Second operand has 7 states, 7 states have (on average 132.71428571428572) internal successors, (929), 7 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:53,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 317 [2023-08-27 01:26:53,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:53,573 INFO L124 PetriNetUnfolderBase]: 199/313 cut-off events. [2023-08-27 01:26:53,573 INFO L125 PetriNetUnfolderBase]: For 102/102 co-relation queries the response was YES. [2023-08-27 01:26:53,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 949 conditions, 313 events. 199/313 cut-off events. For 102/102 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 971 event pairs, 57 based on Foata normal form. 0/246 useless extension candidates. Maximal degree in co-relation 938. Up to 198 conditions per place. [2023-08-27 01:26:53,575 INFO L140 encePairwiseOnDemand]: 313/317 looper letters, 58 selfloop transitions, 9 changer transitions 0/67 dead transitions. [2023-08-27 01:26:53,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 67 transitions, 368 flow [2023-08-27 01:26:53,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:26:53,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:26:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 849 transitions. [2023-08-27 01:26:53,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44637223974763407 [2023-08-27 01:26:53,577 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 849 transitions. [2023-08-27 01:26:53,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 849 transitions. [2023-08-27 01:26:53,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:53,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 849 transitions. [2023-08-27 01:26:53,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 141.5) internal successors, (849), 6 states have internal predecessors, (849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,581 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,581 INFO L175 Difference]: Start difference. First operand has 32 places, 29 transitions, 104 flow. Second operand 6 states and 849 transitions. [2023-08-27 01:26:53,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 67 transitions, 368 flow [2023-08-27 01:26:53,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 67 transitions, 356 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 01:26:53,583 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 159 flow [2023-08-27 01:26:53,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=98, 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=159, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2023-08-27 01:26:53,583 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 5 predicate places. [2023-08-27 01:26:53,584 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 159 flow [2023-08-27 01:26:53,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 132.71428571428572) internal successors, (929), 7 states have internal predecessors, (929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:53,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:53,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:53,789 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 01:26:53,789 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:26:53,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:53,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1863311963, now seen corresponding path program 1 times [2023-08-27 01:26:53,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:53,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076966472] [2023-08-27 01:26:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:53,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:53,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:26:53,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:53,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076966472] [2023-08-27 01:26:53,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076966472] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:53,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:26:53,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 01:26:53,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228999100] [2023-08-27 01:26:53,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:53,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:26:53,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:53,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:26:53,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 01:26:53,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 317 [2023-08-27 01:26:53,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 159 flow. Second operand has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:53,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 317 [2023-08-27 01:26:53,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:53,918 INFO L124 PetriNetUnfolderBase]: 165/262 cut-off events. [2023-08-27 01:26:53,918 INFO L125 PetriNetUnfolderBase]: For 325/335 co-relation queries the response was YES. [2023-08-27 01:26:53,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 948 conditions, 262 events. 165/262 cut-off events. For 325/335 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 711 event pairs, 31 based on Foata normal form. 12/207 useless extension candidates. Maximal degree in co-relation 934. Up to 245 conditions per place. [2023-08-27 01:26:53,920 INFO L140 encePairwiseOnDemand]: 310/317 looper letters, 35 selfloop transitions, 3 changer transitions 0/39 dead transitions. [2023-08-27 01:26:53,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 39 transitions, 244 flow [2023-08-27 01:26:53,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:26:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:26:53,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 419 transitions. [2023-08-27 01:26:53,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4405888538380652 [2023-08-27 01:26:53,921 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 419 transitions. [2023-08-27 01:26:53,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 419 transitions. [2023-08-27 01:26:53,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:53,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 419 transitions. [2023-08-27 01:26:53,922 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 139.66666666666666) internal successors, (419), 3 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,923 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,924 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,924 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 159 flow. Second operand 3 states and 419 transitions. [2023-08-27 01:26:53,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 39 transitions, 244 flow [2023-08-27 01:26:53,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 219 flow, removed 11 selfloop flow, removed 1 redundant places. [2023-08-27 01:26:53,925 INFO L231 Difference]: Finished difference. Result has 40 places, 35 transitions, 151 flow [2023-08-27 01:26:53,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=134, 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=151, PETRI_PLACES=40, PETRI_TRANSITIONS=35} [2023-08-27 01:26:53,926 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-27 01:26:53,926 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 35 transitions, 151 flow [2023-08-27 01:26:53,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:53,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:53,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:53,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 01:26:53,926 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:26:53,927 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:53,927 INFO L85 PathProgramCache]: Analyzing trace with hash 358463012, now seen corresponding path program 1 times [2023-08-27 01:26:53,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:53,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397763707] [2023-08-27 01:26:53,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:53,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:54,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:54,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397763707] [2023-08-27 01:26:54,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397763707] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:54,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806151420] [2023-08-27 01:26:54,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:54,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:54,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:54,399 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:54,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 01:26:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:54,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 01:26:54,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:54,536 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 01:26:54,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:26:54,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 01:26:54,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:26:54,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 01:26:54,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:54,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:54,832 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:26:54,832 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 32 [2023-08-27 01:26:54,842 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:26:54,842 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 175 treesize of output 159 [2023-08-27 01:26:54,847 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 01:26:54,861 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 01:26:54,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:54,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806151420] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:54,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:54,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 01:26:54,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572716424] [2023-08-27 01:26:54,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:54,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:26:54,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:54,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:26:54,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=307, Unknown=1, NotChecked=0, Total=380 [2023-08-27 01:26:54,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:26:54,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 35 transitions, 151 flow. Second operand has 20 states, 20 states have (on average 94.35) internal successors, (1887), 20 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:54,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:54,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:26:54,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:56,053 INFO L124 PetriNetUnfolderBase]: 545/798 cut-off events. [2023-08-27 01:26:56,053 INFO L125 PetriNetUnfolderBase]: For 717/747 co-relation queries the response was YES. [2023-08-27 01:26:56,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2809 conditions, 798 events. 545/798 cut-off events. For 717/747 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2856 event pairs, 21 based on Foata normal form. 30/613 useless extension candidates. Maximal degree in co-relation 2792. Up to 425 conditions per place. [2023-08-27 01:26:56,057 INFO L140 encePairwiseOnDemand]: 305/317 looper letters, 115 selfloop transitions, 66 changer transitions 0/182 dead transitions. [2023-08-27 01:26:56,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 182 transitions, 1198 flow [2023-08-27 01:26:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 01:26:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 01:26:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1791 transitions. [2023-08-27 01:26:56,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3138801261829653 [2023-08-27 01:26:56,062 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1791 transitions. [2023-08-27 01:26:56,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1791 transitions. [2023-08-27 01:26:56,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:56,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1791 transitions. [2023-08-27 01:26:56,066 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 99.5) internal successors, (1791), 18 states have internal predecessors, (1791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:56,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 317.0) internal successors, (6023), 19 states have internal predecessors, (6023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:56,072 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 317.0) internal successors, (6023), 19 states have internal predecessors, (6023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:56,072 INFO L175 Difference]: Start difference. First operand has 40 places, 35 transitions, 151 flow. Second operand 18 states and 1791 transitions. [2023-08-27 01:26:56,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 182 transitions, 1198 flow [2023-08-27 01:26:56,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 182 transitions, 1136 flow, removed 18 selfloop flow, removed 3 redundant places. [2023-08-27 01:26:56,078 INFO L231 Difference]: Finished difference. Result has 62 places, 99 transitions, 726 flow [2023-08-27 01:26:56,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=726, PETRI_PLACES=62, PETRI_TRANSITIONS=99} [2023-08-27 01:26:56,078 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 29 predicate places. [2023-08-27 01:26:56,079 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 99 transitions, 726 flow [2023-08-27 01:26:56,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 94.35) internal successors, (1887), 20 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:56,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:56,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:56,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-27 01:26:56,284 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,SelfDestructingSolverStorable10 [2023-08-27 01:26:56,284 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:26:56,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:56,284 INFO L85 PathProgramCache]: Analyzing trace with hash 234598307, now seen corresponding path program 1 times [2023-08-27 01:26:56,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:56,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377814086] [2023-08-27 01:26:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:56,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:56,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:56,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:56,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377814086] [2023-08-27 01:26:56,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377814086] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:56,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97855022] [2023-08-27 01:26:56,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:56,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:56,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:56,711 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:56,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 01:26:56,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:56,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 01:26:56,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:56,827 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:26:56,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:26:56,864 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:26:56,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:26:56,913 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:26:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:56,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:26:57,128 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:26:57,129 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 29 treesize of output 30 [2023-08-27 01:26:57,135 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:26:57,135 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 79 treesize of output 71 [2023-08-27 01:26:57,138 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2023-08-27 01:26:57,142 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-08-27 01:26:57,201 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:57,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97855022] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:26:57,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:26:57,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 01:26:57,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931028969] [2023-08-27 01:26:57,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:26:57,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:26:57,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:57,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:26:57,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:26:57,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:26:57,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 99 transitions, 726 flow. Second operand has 20 states, 20 states have (on average 94.35) internal successors, (1887), 20 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:57,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:57,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:26:57,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:58,488 INFO L124 PetriNetUnfolderBase]: 571/862 cut-off events. [2023-08-27 01:26:58,488 INFO L125 PetriNetUnfolderBase]: For 2855/2898 co-relation queries the response was YES. [2023-08-27 01:26:58,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4281 conditions, 862 events. 571/862 cut-off events. For 2855/2898 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3294 event pairs, 21 based on Foata normal form. 43/760 useless extension candidates. Maximal degree in co-relation 4257. Up to 468 conditions per place. [2023-08-27 01:26:58,493 INFO L140 encePairwiseOnDemand]: 305/317 looper letters, 134 selfloop transitions, 68 changer transitions 0/203 dead transitions. [2023-08-27 01:26:58,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 203 transitions, 2004 flow [2023-08-27 01:26:58,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 01:26:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 01:26:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1893 transitions. [2023-08-27 01:26:58,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31429520172671427 [2023-08-27 01:26:58,497 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1893 transitions. [2023-08-27 01:26:58,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1893 transitions. [2023-08-27 01:26:58,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:58,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1893 transitions. [2023-08-27 01:26:58,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 99.63157894736842) internal successors, (1893), 19 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:58,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 317.0) internal successors, (6340), 20 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:58,506 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 317.0) internal successors, (6340), 20 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:58,506 INFO L175 Difference]: Start difference. First operand has 62 places, 99 transitions, 726 flow. Second operand 19 states and 1893 transitions. [2023-08-27 01:26:58,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 203 transitions, 2004 flow [2023-08-27 01:26:58,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 203 transitions, 1954 flow, removed 21 selfloop flow, removed 3 redundant places. [2023-08-27 01:26:58,515 INFO L231 Difference]: Finished difference. Result has 79 places, 111 transitions, 978 flow [2023-08-27 01:26:58,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=670, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=978, PETRI_PLACES=79, PETRI_TRANSITIONS=111} [2023-08-27 01:26:58,516 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 46 predicate places. [2023-08-27 01:26:58,516 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 111 transitions, 978 flow [2023-08-27 01:26:58,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 94.35) internal successors, (1887), 20 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:58,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:58,516 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:58,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:58,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:58,742 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:26:58,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:58,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1069472869, now seen corresponding path program 1 times [2023-08-27 01:26:58,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:58,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073410395] [2023-08-27 01:26:58,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:58,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:59,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:59,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:59,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073410395] [2023-08-27 01:26:59,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073410395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:59,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919942359] [2023-08-27 01:26:59,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:59,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:59,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:59,237 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:59,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 01:26:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:59,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 01:26:59,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:59,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:26:59,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:26:59,404 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 01:26:59,404 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:26:59,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919942359] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:26:59,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:26:59,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 12 [2023-08-27 01:26:59,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777005352] [2023-08-27 01:26:59,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:26:59,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 01:26:59,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:26:59,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 01:26:59,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2023-08-27 01:26:59,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 317 [2023-08-27 01:26:59,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 111 transitions, 978 flow. Second operand has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:59,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:26:59,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 317 [2023-08-27 01:26:59,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:26:59,566 INFO L124 PetriNetUnfolderBase]: 618/955 cut-off events. [2023-08-27 01:26:59,566 INFO L125 PetriNetUnfolderBase]: For 3891/3934 co-relation queries the response was YES. [2023-08-27 01:26:59,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5028 conditions, 955 events. 618/955 cut-off events. For 3891/3934 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3828 event pairs, 24 based on Foata normal form. 151/1017 useless extension candidates. Maximal degree in co-relation 5001. Up to 496 conditions per place. [2023-08-27 01:26:59,571 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 118 selfloop transitions, 30 changer transitions 0/149 dead transitions. [2023-08-27 01:26:59,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 149 transitions, 1599 flow [2023-08-27 01:26:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:26:59,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:26:59,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 593 transitions. [2023-08-27 01:26:59,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741324921135647 [2023-08-27 01:26:59,575 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 593 transitions. [2023-08-27 01:26:59,575 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 593 transitions. [2023-08-27 01:26:59,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:26:59,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 593 transitions. [2023-08-27 01:26:59,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.6) internal successors, (593), 5 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:59,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:59,578 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:59,578 INFO L175 Difference]: Start difference. First operand has 79 places, 111 transitions, 978 flow. Second operand 5 states and 593 transitions. [2023-08-27 01:26:59,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 149 transitions, 1599 flow [2023-08-27 01:26:59,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 149 transitions, 1384 flow, removed 49 selfloop flow, removed 13 redundant places. [2023-08-27 01:26:59,586 INFO L231 Difference]: Finished difference. Result has 71 places, 116 transitions, 933 flow [2023-08-27 01:26:59,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=727, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=933, PETRI_PLACES=71, PETRI_TRANSITIONS=116} [2023-08-27 01:26:59,586 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 38 predicate places. [2023-08-27 01:26:59,587 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 116 transitions, 933 flow [2023-08-27 01:26:59,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:26:59,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:26:59,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:26:59,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 01:26:59,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:59,792 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:26:59,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:26:59,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1314907187, now seen corresponding path program 1 times [2023-08-27 01:26:59,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:26:59,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228174957] [2023-08-27 01:26:59,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:59,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:26:59,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:59,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:26:59,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228174957] [2023-08-27 01:26:59,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228174957] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:26:59,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393823477] [2023-08-27 01:26:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:26:59,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:26:59,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:26:59,854 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:26:59,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 01:26:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:26:59,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-27 01:26:59,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:26:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:26:59,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:00,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393823477] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:00,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:00,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2023-08-27 01:27:00,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244778650] [2023-08-27 01:27:00,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:00,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 01:27:00,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:00,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 01:27:00,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-08-27 01:27:00,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 317 [2023-08-27 01:27:00,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 116 transitions, 933 flow. Second operand has 12 states, 12 states have (on average 121.66666666666667) internal successors, (1460), 12 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:00,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:00,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 317 [2023-08-27 01:27:00,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:00,157 INFO L124 PetriNetUnfolderBase]: 505/820 cut-off events. [2023-08-27 01:27:00,157 INFO L125 PetriNetUnfolderBase]: For 3772/3815 co-relation queries the response was YES. [2023-08-27 01:27:00,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4380 conditions, 820 events. 505/820 cut-off events. For 3772/3815 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3389 event pairs, 184 based on Foata normal form. 79/812 useless extension candidates. Maximal degree in co-relation 4351. Up to 695 conditions per place. [2023-08-27 01:27:00,162 INFO L140 encePairwiseOnDemand]: 312/317 looper letters, 105 selfloop transitions, 10 changer transitions 0/116 dead transitions. [2023-08-27 01:27:00,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 116 transitions, 1115 flow [2023-08-27 01:27:00,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 01:27:00,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 01:27:00,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 763 transitions. [2023-08-27 01:27:00,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011566771819138 [2023-08-27 01:27:00,164 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 763 transitions. [2023-08-27 01:27:00,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 763 transitions. [2023-08-27 01:27:00,164 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:00,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 763 transitions. [2023-08-27 01:27:00,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 127.16666666666667) internal successors, (763), 6 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:00,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:00,167 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 317.0) internal successors, (2219), 7 states have internal predecessors, (2219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:00,167 INFO L175 Difference]: Start difference. First operand has 71 places, 116 transitions, 933 flow. Second operand 6 states and 763 transitions. [2023-08-27 01:27:00,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 116 transitions, 1115 flow [2023-08-27 01:27:00,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 116 transitions, 1065 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-08-27 01:27:00,173 INFO L231 Difference]: Finished difference. Result has 72 places, 102 transitions, 802 flow [2023-08-27 01:27:00,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=768, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=802, PETRI_PLACES=72, PETRI_TRANSITIONS=102} [2023-08-27 01:27:00,174 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 39 predicate places. [2023-08-27 01:27:00,174 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 102 transitions, 802 flow [2023-08-27 01:27:00,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 121.66666666666667) internal successors, (1460), 12 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:00,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:00,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:00,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:00,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-27 01:27:00,380 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:00,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:00,380 INFO L85 PathProgramCache]: Analyzing trace with hash 355628131, now seen corresponding path program 2 times [2023-08-27 01:27:00,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:00,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379577109] [2023-08-27 01:27:00,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:00,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:00,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:00,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:00,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379577109] [2023-08-27 01:27:00,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379577109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:00,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702116206] [2023-08-27 01:27:00,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:27:00,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:00,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:00,742 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:00,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 01:27:00,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:27:00,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:00,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 01:27:00,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:27:00,853 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:27:00,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702116206] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:00,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:27:00,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-08-27 01:27:00,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589813294] [2023-08-27 01:27:00,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:00,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:27:00,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:00,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:27:00,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-27 01:27:00,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 317 [2023-08-27 01:27:00,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 102 transitions, 802 flow. Second operand has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:00,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:00,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 317 [2023-08-27 01:27:00,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:01,011 INFO L124 PetriNetUnfolderBase]: 650/1050 cut-off events. [2023-08-27 01:27:01,011 INFO L125 PetriNetUnfolderBase]: For 4242/4285 co-relation queries the response was YES. [2023-08-27 01:27:01,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5300 conditions, 1050 events. 650/1050 cut-off events. For 4242/4285 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4649 event pairs, 66 based on Foata normal form. 73/1040 useless extension candidates. Maximal degree in co-relation 5270. Up to 740 conditions per place. [2023-08-27 01:27:01,018 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 123 selfloop transitions, 28 changer transitions 0/152 dead transitions. [2023-08-27 01:27:01,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 152 transitions, 1504 flow [2023-08-27 01:27:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:27:01,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:27:01,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 625 transitions. [2023-08-27 01:27:01,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943217665615142 [2023-08-27 01:27:01,020 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 625 transitions. [2023-08-27 01:27:01,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 625 transitions. [2023-08-27 01:27:01,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:01,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 625 transitions. [2023-08-27 01:27:01,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 125.0) internal successors, (625), 5 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:01,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:01,023 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:01,023 INFO L175 Difference]: Start difference. First operand has 72 places, 102 transitions, 802 flow. Second operand 5 states and 625 transitions. [2023-08-27 01:27:01,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 152 transitions, 1504 flow [2023-08-27 01:27:01,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 152 transitions, 1477 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-27 01:27:01,031 INFO L231 Difference]: Finished difference. Result has 73 places, 112 transitions, 951 flow [2023-08-27 01:27:01,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=780, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=951, PETRI_PLACES=73, PETRI_TRANSITIONS=112} [2023-08-27 01:27:01,032 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 40 predicate places. [2023-08-27 01:27:01,032 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 112 transitions, 951 flow [2023-08-27 01:27:01,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:01,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:01,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:01,043 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:01,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 01:27:01,237 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:01,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:01,238 INFO L85 PathProgramCache]: Analyzing trace with hash 355636780, now seen corresponding path program 1 times [2023-08-27 01:27:01,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:01,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031225453] [2023-08-27 01:27:01,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:01,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:01,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:01,562 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:01,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:01,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031225453] [2023-08-27 01:27:01,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031225453] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:01,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105828081] [2023-08-27 01:27:01,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:01,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:01,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:01,563 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:01,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 01:27:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:01,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 01:27:01,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:01,660 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:27:01,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:01,694 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:27:01,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:01,730 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:27:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:01,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:01,934 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:01,935 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 29 treesize of output 30 [2023-08-27 01:27:01,941 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:01,941 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 157 treesize of output 141 [2023-08-27 01:27:01,946 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 27 treesize of output 21 [2023-08-27 01:27:01,989 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 28 treesize of output 16 [2023-08-27 01:27:02,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:02,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105828081] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:02,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:02,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2023-08-27 01:27:02,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752263391] [2023-08-27 01:27:02,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:02,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:27:02,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:02,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:27:02,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=310, Unknown=1, NotChecked=0, Total=380 [2023-08-27 01:27:02,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:27:02,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 112 transitions, 951 flow. Second operand has 20 states, 20 states have (on average 94.35) internal successors, (1887), 20 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:02,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:02,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:27:02,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:02,860 INFO L124 PetriNetUnfolderBase]: 725/1167 cut-off events. [2023-08-27 01:27:02,860 INFO L125 PetriNetUnfolderBase]: For 4877/4920 co-relation queries the response was YES. [2023-08-27 01:27:02,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6289 conditions, 1167 events. 725/1167 cut-off events. For 4877/4920 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5280 event pairs, 91 based on Foata normal form. 65/1143 useless extension candidates. Maximal degree in co-relation 6258. Up to 742 conditions per place. [2023-08-27 01:27:02,867 INFO L140 encePairwiseOnDemand]: 305/317 looper letters, 133 selfloop transitions, 72 changer transitions 0/206 dead transitions. [2023-08-27 01:27:02,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 206 transitions, 2089 flow [2023-08-27 01:27:02,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 01:27:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 01:27:02,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1500 transitions. [2023-08-27 01:27:02,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31545741324921134 [2023-08-27 01:27:02,870 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1500 transitions. [2023-08-27 01:27:02,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1500 transitions. [2023-08-27 01:27:02,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:02,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1500 transitions. [2023-08-27 01:27:02,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 100.0) internal successors, (1500), 15 states have internal predecessors, (1500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:02,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 317.0) internal successors, (5072), 16 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:02,876 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 317.0) internal successors, (5072), 16 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:02,876 INFO L175 Difference]: Start difference. First operand has 73 places, 112 transitions, 951 flow. Second operand 15 states and 1500 transitions. [2023-08-27 01:27:02,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 206 transitions, 2089 flow [2023-08-27 01:27:02,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 206 transitions, 2045 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-27 01:27:02,887 INFO L231 Difference]: Finished difference. Result has 88 places, 137 transitions, 1403 flow [2023-08-27 01:27:02,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1403, PETRI_PLACES=88, PETRI_TRANSITIONS=137} [2023-08-27 01:27:02,887 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 55 predicate places. [2023-08-27 01:27:02,887 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 137 transitions, 1403 flow [2023-08-27 01:27:02,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 94.35) internal successors, (1887), 20 states have internal predecessors, (1887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:02,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:02,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:02,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:03,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-27 01:27:03,093 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:03,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:03,093 INFO L85 PathProgramCache]: Analyzing trace with hash 355636742, now seen corresponding path program 2 times [2023-08-27 01:27:03,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:03,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905516331] [2023-08-27 01:27:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:03,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:03,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:03,365 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:03,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:03,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905516331] [2023-08-27 01:27:03,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905516331] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:03,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919316] [2023-08-27 01:27:03,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:27:03,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:03,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:03,375 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:03,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 01:27:03,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:27:03,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:03,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 01:27:03,445 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:03,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:27:03,478 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:27:03,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919316] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:03,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:27:03,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 9 [2023-08-27 01:27:03,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451069453] [2023-08-27 01:27:03,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:03,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:27:03,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:03,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:27:03,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-08-27 01:27:03,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 317 [2023-08-27 01:27:03,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 137 transitions, 1403 flow. Second operand has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:03,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:03,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 317 [2023-08-27 01:27:03,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:03,667 INFO L124 PetriNetUnfolderBase]: 736/1200 cut-off events. [2023-08-27 01:27:03,667 INFO L125 PetriNetUnfolderBase]: For 6647/6690 co-relation queries the response was YES. [2023-08-27 01:27:03,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7065 conditions, 1200 events. 736/1200 cut-off events. For 6647/6690 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5566 event pairs, 154 based on Foata normal form. 59/1170 useless extension candidates. Maximal degree in co-relation 7031. Up to 1107 conditions per place. [2023-08-27 01:27:03,676 INFO L140 encePairwiseOnDemand]: 308/317 looper letters, 123 selfloop transitions, 29 changer transitions 0/153 dead transitions. [2023-08-27 01:27:03,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 153 transitions, 1791 flow [2023-08-27 01:27:03,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:27:03,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:27:03,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 622 transitions. [2023-08-27 01:27:03,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3924290220820189 [2023-08-27 01:27:03,677 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 622 transitions. [2023-08-27 01:27:03,677 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 622 transitions. [2023-08-27 01:27:03,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:03,677 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 622 transitions. [2023-08-27 01:27:03,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 124.4) internal successors, (622), 5 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:03,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:03,680 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:03,680 INFO L175 Difference]: Start difference. First operand has 88 places, 137 transitions, 1403 flow. Second operand 5 states and 622 transitions. [2023-08-27 01:27:03,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 153 transitions, 1791 flow [2023-08-27 01:27:03,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 153 transitions, 1691 flow, removed 26 selfloop flow, removed 9 redundant places. [2023-08-27 01:27:03,692 INFO L231 Difference]: Finished difference. Result has 85 places, 142 transitions, 1456 flow [2023-08-27 01:27:03,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1456, PETRI_PLACES=85, PETRI_TRANSITIONS=142} [2023-08-27 01:27:03,693 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 52 predicate places. [2023-08-27 01:27:03,693 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 142 transitions, 1456 flow [2023-08-27 01:27:03,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:03,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:03,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:03,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:03,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-27 01:27:03,898 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:03,899 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:03,899 INFO L85 PathProgramCache]: Analyzing trace with hash 270289158, now seen corresponding path program 3 times [2023-08-27 01:27:03,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:03,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391776249] [2023-08-27 01:27:03,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:03,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:27:04,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:04,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391776249] [2023-08-27 01:27:04,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391776249] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:04,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673719889] [2023-08-27 01:27:04,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:27:04,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:04,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:04,176 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:04,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 01:27:04,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 01:27:04,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:04,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-27 01:27:04,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:04,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:04,318 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:27:04,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:27:04,345 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:27:04,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673719889] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:04,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:27:04,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 11 [2023-08-27 01:27:04,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439742916] [2023-08-27 01:27:04,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:04,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 01:27:04,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:04,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 01:27:04,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-27 01:27:04,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 317 [2023-08-27 01:27:04,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 142 transitions, 1456 flow. Second operand has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:04,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:04,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 317 [2023-08-27 01:27:04,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:04,528 INFO L124 PetriNetUnfolderBase]: 716/1164 cut-off events. [2023-08-27 01:27:04,528 INFO L125 PetriNetUnfolderBase]: For 6910/6953 co-relation queries the response was YES. [2023-08-27 01:27:04,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6980 conditions, 1164 events. 716/1164 cut-off events. For 6910/6953 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5268 event pairs, 127 based on Foata normal form. 59/1182 useless extension candidates. Maximal degree in co-relation 6945. Up to 1035 conditions per place. [2023-08-27 01:27:04,538 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 115 selfloop transitions, 35 changer transitions 0/151 dead transitions. [2023-08-27 01:27:04,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 151 transitions, 1777 flow [2023-08-27 01:27:04,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:27:04,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:27:04,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 586 transitions. [2023-08-27 01:27:04,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36971608832807573 [2023-08-27 01:27:04,540 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 586 transitions. [2023-08-27 01:27:04,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 586 transitions. [2023-08-27 01:27:04,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:04,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 586 transitions. [2023-08-27 01:27:04,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 117.2) internal successors, (586), 5 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:04,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:04,542 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:04,542 INFO L175 Difference]: Start difference. First operand has 85 places, 142 transitions, 1456 flow. Second operand 5 states and 586 transitions. [2023-08-27 01:27:04,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 151 transitions, 1777 flow [2023-08-27 01:27:04,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 151 transitions, 1714 flow, removed 24 selfloop flow, removed 1 redundant places. [2023-08-27 01:27:04,554 INFO L231 Difference]: Finished difference. Result has 89 places, 142 transitions, 1507 flow [2023-08-27 01:27:04,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1353, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1507, PETRI_PLACES=89, PETRI_TRANSITIONS=142} [2023-08-27 01:27:04,554 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 56 predicate places. [2023-08-27 01:27:04,555 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 142 transitions, 1507 flow [2023-08-27 01:27:04,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:04,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:04,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:04,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-27 01:27:04,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-27 01:27:04,760 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:04,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:04,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1314993491, now seen corresponding path program 1 times [2023-08-27 01:27:04,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:04,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660605359] [2023-08-27 01:27:04,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:04,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:04,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:04,800 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 01:27:04,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:04,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660605359] [2023-08-27 01:27:04,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660605359] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:04,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:27:04,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 01:27:04,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510580098] [2023-08-27 01:27:04,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:04,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 01:27:04,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:04,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 01:27:04,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 01:27:04,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 317 [2023-08-27 01:27:04,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 142 transitions, 1507 flow. Second operand has 4 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:04,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:04,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 317 [2023-08-27 01:27:04,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:05,002 INFO L124 PetriNetUnfolderBase]: 815/1361 cut-off events. [2023-08-27 01:27:05,002 INFO L125 PetriNetUnfolderBase]: For 9117/9160 co-relation queries the response was YES. [2023-08-27 01:27:05,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8360 conditions, 1361 events. 815/1361 cut-off events. For 9117/9160 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6407 event pairs, 96 based on Foata normal form. 107/1419 useless extension candidates. Maximal degree in co-relation 8322. Up to 900 conditions per place. [2023-08-27 01:27:05,009 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 112 selfloop transitions, 69 changer transitions 8/190 dead transitions. [2023-08-27 01:27:05,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 190 transitions, 2344 flow [2023-08-27 01:27:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:27:05,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:27:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 581 transitions. [2023-08-27 01:27:05,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582018927444795 [2023-08-27 01:27:05,011 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 581 transitions. [2023-08-27 01:27:05,011 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 581 transitions. [2023-08-27 01:27:05,011 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:05,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 581 transitions. [2023-08-27 01:27:05,011 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 145.25) internal successors, (581), 4 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:05,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:05,013 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:05,013 INFO L175 Difference]: Start difference. First operand has 89 places, 142 transitions, 1507 flow. Second operand 4 states and 581 transitions. [2023-08-27 01:27:05,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 190 transitions, 2344 flow [2023-08-27 01:27:05,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 190 transitions, 2273 flow, removed 17 selfloop flow, removed 2 redundant places. [2023-08-27 01:27:05,027 INFO L231 Difference]: Finished difference. Result has 92 places, 164 transitions, 2009 flow [2023-08-27 01:27:05,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1440, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2009, PETRI_PLACES=92, PETRI_TRANSITIONS=164} [2023-08-27 01:27:05,027 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 59 predicate places. [2023-08-27 01:27:05,027 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 164 transitions, 2009 flow [2023-08-27 01:27:05,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 135.5) internal successors, (542), 4 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:05,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:05,028 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:05,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-27 01:27:05,028 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:05,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:05,028 INFO L85 PathProgramCache]: Analyzing trace with hash 577946290, now seen corresponding path program 2 times [2023-08-27 01:27:05,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:05,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716416555] [2023-08-27 01:27:05,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:05,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:05,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:05,391 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 01:27:05,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:05,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716416555] [2023-08-27 01:27:05,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716416555] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:05,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362510572] [2023-08-27 01:27:05,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:27:05,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:05,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:05,397 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:05,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 01:27:05,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:27:05,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:05,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 01:27:05,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:05,511 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 01:27:05,511 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:27:05,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362510572] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:05,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:27:05,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 10 [2023-08-27 01:27:05,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687654497] [2023-08-27 01:27:05,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:05,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:27:05,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:05,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:27:05,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-08-27 01:27:05,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 317 [2023-08-27 01:27:05,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 164 transitions, 2009 flow. Second operand has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:05,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:05,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 317 [2023-08-27 01:27:05,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:05,673 INFO L124 PetriNetUnfolderBase]: 801/1332 cut-off events. [2023-08-27 01:27:05,674 INFO L125 PetriNetUnfolderBase]: For 11002/11045 co-relation queries the response was YES. [2023-08-27 01:27:05,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9151 conditions, 1332 events. 801/1332 cut-off events. For 11002/11045 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 6225 event pairs, 144 based on Foata normal form. 43/1326 useless extension candidates. Maximal degree in co-relation 9111. Up to 1239 conditions per place. [2023-08-27 01:27:05,681 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 146 selfloop transitions, 25 changer transitions 0/172 dead transitions. [2023-08-27 01:27:05,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 172 transitions, 2360 flow [2023-08-27 01:27:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:27:05,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:27:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 619 transitions. [2023-08-27 01:27:05,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3905362776025237 [2023-08-27 01:27:05,682 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 619 transitions. [2023-08-27 01:27:05,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 619 transitions. [2023-08-27 01:27:05,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:05,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 619 transitions. [2023-08-27 01:27:05,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 123.8) internal successors, (619), 5 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:05,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:05,684 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:05,684 INFO L175 Difference]: Start difference. First operand has 92 places, 164 transitions, 2009 flow. Second operand 5 states and 619 transitions. [2023-08-27 01:27:05,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 172 transitions, 2360 flow [2023-08-27 01:27:05,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 172 transitions, 2273 flow, removed 36 selfloop flow, removed 2 redundant places. [2023-08-27 01:27:05,704 INFO L231 Difference]: Finished difference. Result has 94 places, 163 transitions, 1959 flow [2023-08-27 01:27:05,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1909, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1959, PETRI_PLACES=94, PETRI_TRANSITIONS=163} [2023-08-27 01:27:05,704 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 61 predicate places. [2023-08-27 01:27:05,704 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 163 transitions, 1959 flow [2023-08-27 01:27:05,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:05,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:05,704 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:05,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:05,909 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 01:27:05,909 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:05,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:05,910 INFO L85 PathProgramCache]: Analyzing trace with hash 613551340, now seen corresponding path program 3 times [2023-08-27 01:27:05,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:05,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6967881] [2023-08-27 01:27:05,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:05,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:06,592 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 01:27:06,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:06,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6967881] [2023-08-27 01:27:06,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6967881] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:06,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419899622] [2023-08-27 01:27:06,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:27:06,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:06,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:06,594 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:06,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 01:27:06,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 01:27:06,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:06,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 01:27:06,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:06,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:06,737 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:27:06,765 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 01:27:06,766 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:27:06,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419899622] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:06,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:27:06,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-27 01:27:06,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555491028] [2023-08-27 01:27:06,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:06,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 01:27:06,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:06,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 01:27:06,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-08-27 01:27:06,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 317 [2023-08-27 01:27:06,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 163 transitions, 1959 flow. Second operand has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:06,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:06,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 317 [2023-08-27 01:27:06,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:07,028 INFO L124 PetriNetUnfolderBase]: 794/1321 cut-off events. [2023-08-27 01:27:07,028 INFO L125 PetriNetUnfolderBase]: For 9374/9417 co-relation queries the response was YES. [2023-08-27 01:27:07,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8662 conditions, 1321 events. 794/1321 cut-off events. For 9374/9417 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 6128 event pairs, 132 based on Foata normal form. 47/1323 useless extension candidates. Maximal degree in co-relation 8622. Up to 1192 conditions per place. [2023-08-27 01:27:07,062 INFO L140 encePairwiseOnDemand]: 310/317 looper letters, 140 selfloop transitions, 29 changer transitions 0/170 dead transitions. [2023-08-27 01:27:07,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 170 transitions, 2291 flow [2023-08-27 01:27:07,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:27:07,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:27:07,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 584 transitions. [2023-08-27 01:27:07,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36845425867507886 [2023-08-27 01:27:07,064 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 584 transitions. [2023-08-27 01:27:07,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 584 transitions. [2023-08-27 01:27:07,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:07,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 584 transitions. [2023-08-27 01:27:07,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 116.8) internal successors, (584), 5 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:07,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:07,068 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:07,068 INFO L175 Difference]: Start difference. First operand has 94 places, 163 transitions, 1959 flow. Second operand 5 states and 584 transitions. [2023-08-27 01:27:07,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 170 transitions, 2291 flow [2023-08-27 01:27:07,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 170 transitions, 2231 flow, removed 3 selfloop flow, removed 5 redundant places. [2023-08-27 01:27:07,099 INFO L231 Difference]: Finished difference. Result has 93 places, 161 transitions, 1929 flow [2023-08-27 01:27:07,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1871, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1929, PETRI_PLACES=93, PETRI_TRANSITIONS=161} [2023-08-27 01:27:07,100 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 60 predicate places. [2023-08-27 01:27:07,100 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 161 transitions, 1929 flow [2023-08-27 01:27:07,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:07,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:07,100 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:07,117 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 01:27:07,301 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 01:27:07,301 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:07,301 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:07,301 INFO L85 PathProgramCache]: Analyzing trace with hash 605239651, now seen corresponding path program 3 times [2023-08-27 01:27:07,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:07,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732274962] [2023-08-27 01:27:07,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:07,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:08,110 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 01:27:08,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:08,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732274962] [2023-08-27 01:27:08,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732274962] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:08,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273957008] [2023-08-27 01:27:08,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:27:08,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:08,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:08,112 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:08,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 01:27:08,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-08-27 01:27:08,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:08,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 01:27:08,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:08,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:08,255 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:27:08,297 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 01:27:08,297 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:27:08,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273957008] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:08,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:27:08,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 13 [2023-08-27 01:27:08,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521175656] [2023-08-27 01:27:08,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:08,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 01:27:08,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:08,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 01:27:08,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-27 01:27:08,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 317 [2023-08-27 01:27:08,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 161 transitions, 1929 flow. Second operand has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:08,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:08,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 317 [2023-08-27 01:27:08,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:08,579 INFO L124 PetriNetUnfolderBase]: 746/1243 cut-off events. [2023-08-27 01:27:08,579 INFO L125 PetriNetUnfolderBase]: For 9090/9133 co-relation queries the response was YES. [2023-08-27 01:27:08,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8146 conditions, 1243 events. 746/1243 cut-off events. For 9090/9133 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5700 event pairs, 55 based on Foata normal form. 71/1271 useless extension candidates. Maximal degree in co-relation 8107. Up to 668 conditions per place. [2023-08-27 01:27:08,588 INFO L140 encePairwiseOnDemand]: 310/317 looper letters, 135 selfloop transitions, 37 changer transitions 0/173 dead transitions. [2023-08-27 01:27:08,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 173 transitions, 2385 flow [2023-08-27 01:27:08,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:27:08,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:27:08,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 590 transitions. [2023-08-27 01:27:08,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3722397476340694 [2023-08-27 01:27:08,589 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 590 transitions. [2023-08-27 01:27:08,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 590 transitions. [2023-08-27 01:27:08,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:08,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 590 transitions. [2023-08-27 01:27:08,590 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:08,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:08,592 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:08,592 INFO L175 Difference]: Start difference. First operand has 93 places, 161 transitions, 1929 flow. Second operand 5 states and 590 transitions. [2023-08-27 01:27:08,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 173 transitions, 2385 flow [2023-08-27 01:27:08,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 173 transitions, 2267 flow, removed 30 selfloop flow, removed 5 redundant places. [2023-08-27 01:27:08,613 INFO L231 Difference]: Finished difference. Result has 90 places, 148 transitions, 1780 flow [2023-08-27 01:27:08,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1780, PETRI_PLACES=90, PETRI_TRANSITIONS=148} [2023-08-27 01:27:08,613 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 57 predicate places. [2023-08-27 01:27:08,613 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 148 transitions, 1780 flow [2023-08-27 01:27:08,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:08,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:08,614 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:08,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:08,818 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 01:27:08,819 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:08,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:08,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1234348629, now seen corresponding path program 1 times [2023-08-27 01:27:08,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:08,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703137951] [2023-08-27 01:27:08,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:08,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 01:27:08,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:08,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703137951] [2023-08-27 01:27:08,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703137951] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:08,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348819757] [2023-08-27 01:27:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:08,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:08,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:08,871 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:08,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 01:27:08,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:08,998 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 01:27:08,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:09,051 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:27:09,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:09,109 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:27:09,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348819757] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:09,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:09,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2023-08-27 01:27:09,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974634200] [2023-08-27 01:27:09,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:09,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 01:27:09,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:09,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 01:27:09,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-27 01:27:09,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 317 [2023-08-27 01:27:09,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 148 transitions, 1780 flow. Second operand has 18 states, 18 states have (on average 115.66666666666667) internal successors, (2082), 18 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:09,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:09,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 317 [2023-08-27 01:27:09,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:09,428 INFO L124 PetriNetUnfolderBase]: 686/1225 cut-off events. [2023-08-27 01:27:09,429 INFO L125 PetriNetUnfolderBase]: For 8533/8533 co-relation queries the response was YES. [2023-08-27 01:27:09,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7627 conditions, 1225 events. 686/1225 cut-off events. For 8533/8533 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5844 event pairs, 133 based on Foata normal form. 117/1301 useless extension candidates. Maximal degree in co-relation 7589. Up to 561 conditions per place. [2023-08-27 01:27:09,435 INFO L140 encePairwiseOnDemand]: 310/317 looper letters, 193 selfloop transitions, 53 changer transitions 4/250 dead transitions. [2023-08-27 01:27:09,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 250 transitions, 3294 flow [2023-08-27 01:27:09,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 01:27:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 01:27:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1945 transitions. [2023-08-27 01:27:09,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38347791798107256 [2023-08-27 01:27:09,437 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1945 transitions. [2023-08-27 01:27:09,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1945 transitions. [2023-08-27 01:27:09,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:09,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1945 transitions. [2023-08-27 01:27:09,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 121.5625) internal successors, (1945), 16 states have internal predecessors, (1945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:09,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 317.0) internal successors, (5389), 17 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:09,444 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 317.0) internal successors, (5389), 17 states have internal predecessors, (5389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:09,444 INFO L175 Difference]: Start difference. First operand has 90 places, 148 transitions, 1780 flow. Second operand 16 states and 1945 transitions. [2023-08-27 01:27:09,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 250 transitions, 3294 flow [2023-08-27 01:27:09,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 250 transitions, 3118 flow, removed 18 selfloop flow, removed 4 redundant places. [2023-08-27 01:27:09,459 INFO L231 Difference]: Finished difference. Result has 102 places, 133 transitions, 1638 flow [2023-08-27 01:27:09,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1390, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1638, PETRI_PLACES=102, PETRI_TRANSITIONS=133} [2023-08-27 01:27:09,460 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 69 predicate places. [2023-08-27 01:27:09,460 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 133 transitions, 1638 flow [2023-08-27 01:27:09,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 115.66666666666667) internal successors, (2082), 18 states have internal predecessors, (2082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:09,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:09,461 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:09,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:09,665 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 01:27:09,666 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:09,666 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:09,666 INFO L85 PathProgramCache]: Analyzing trace with hash 701725194, now seen corresponding path program 4 times [2023-08-27 01:27:09,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:09,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834375582] [2023-08-27 01:27:09,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:09,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:09,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:10,230 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 01:27:10,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:10,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834375582] [2023-08-27 01:27:10,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834375582] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:10,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269667650] [2023-08-27 01:27:10,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:27:10,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:10,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:10,232 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:10,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 01:27:10,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:27:10,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:10,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 01:27:10,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:10,424 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 01:27:10,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:10,442 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:10,442 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 01:27:10,467 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 01:27:10,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269667650] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:10,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 01:27:10,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 5] total 15 [2023-08-27 01:27:10,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011224041] [2023-08-27 01:27:10,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:10,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:27:10,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:10,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:27:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2023-08-27 01:27:10,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 317 [2023-08-27 01:27:10,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 133 transitions, 1638 flow. Second operand has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:10,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:10,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 317 [2023-08-27 01:27:10,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:10,609 INFO L124 PetriNetUnfolderBase]: 664/1188 cut-off events. [2023-08-27 01:27:10,609 INFO L125 PetriNetUnfolderBase]: For 7994/8032 co-relation queries the response was YES. [2023-08-27 01:27:10,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7508 conditions, 1188 events. 664/1188 cut-off events. For 7994/8032 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5636 event pairs, 142 based on Foata normal form. 36/1187 useless extension candidates. Maximal degree in co-relation 7469. Up to 1116 conditions per place. [2023-08-27 01:27:10,614 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 115 selfloop transitions, 21 changer transitions 0/138 dead transitions. [2023-08-27 01:27:10,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 138 transitions, 1912 flow [2023-08-27 01:27:10,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:27:10,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:27:10,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 498 transitions. [2023-08-27 01:27:10,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39274447949526814 [2023-08-27 01:27:10,616 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 498 transitions. [2023-08-27 01:27:10,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 498 transitions. [2023-08-27 01:27:10,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:10,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 498 transitions. [2023-08-27 01:27:10,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.5) internal successors, (498), 4 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:10,618 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:10,618 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:10,618 INFO L175 Difference]: Start difference. First operand has 102 places, 133 transitions, 1638 flow. Second operand 4 states and 498 transitions. [2023-08-27 01:27:10,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 138 transitions, 1912 flow [2023-08-27 01:27:10,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 138 transitions, 1750 flow, removed 41 selfloop flow, removed 8 redundant places. [2023-08-27 01:27:10,633 INFO L231 Difference]: Finished difference. Result has 97 places, 132 transitions, 1505 flow [2023-08-27 01:27:10,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1505, PETRI_PLACES=97, PETRI_TRANSITIONS=132} [2023-08-27 01:27:10,633 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 64 predicate places. [2023-08-27 01:27:10,633 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 132 transitions, 1505 flow [2023-08-27 01:27:10,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:10,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:10,633 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:10,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 01:27:10,838 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 01:27:10,838 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:10,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:10,838 INFO L85 PathProgramCache]: Analyzing trace with hash 577860692, now seen corresponding path program 4 times [2023-08-27 01:27:10,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:10,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240485757] [2023-08-27 01:27:10,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:10,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:11,238 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 01:27:11,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:11,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240485757] [2023-08-27 01:27:11,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240485757] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:11,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597735213] [2023-08-27 01:27:11,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:27:11,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:11,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:11,239 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 01:27:11,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 01:27:11,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:27:11,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:11,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 01:27:11,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:11,387 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 01:27:11,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:11,407 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:11,407 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 01:27:11,430 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 01:27:11,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597735213] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:11,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 01:27:11,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 5] total 14 [2023-08-27 01:27:11,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698790956] [2023-08-27 01:27:11,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:11,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:27:11,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:11,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:27:11,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2023-08-27 01:27:11,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 317 [2023-08-27 01:27:11,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 132 transitions, 1505 flow. Second operand has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:11,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:11,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 317 [2023-08-27 01:27:11,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:11,598 INFO L124 PetriNetUnfolderBase]: 638/1158 cut-off events. [2023-08-27 01:27:11,598 INFO L125 PetriNetUnfolderBase]: For 7000/7038 co-relation queries the response was YES. [2023-08-27 01:27:11,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6745 conditions, 1158 events. 638/1158 cut-off events. For 7000/7038 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 5658 event pairs, 50 based on Foata normal form. 36/1177 useless extension candidates. Maximal degree in co-relation 6706. Up to 958 conditions per place. [2023-08-27 01:27:11,603 INFO L140 encePairwiseOnDemand]: 308/317 looper letters, 113 selfloop transitions, 31 changer transitions 0/146 dead transitions. [2023-08-27 01:27:11,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 146 transitions, 1874 flow [2023-08-27 01:27:11,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:27:11,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:27:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 501 transitions. [2023-08-27 01:27:11,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951104100946372 [2023-08-27 01:27:11,617 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 501 transitions. [2023-08-27 01:27:11,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 501 transitions. [2023-08-27 01:27:11,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:11,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 501 transitions. [2023-08-27 01:27:11,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 01:27:11,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:11,619 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:11,619 INFO L175 Difference]: Start difference. First operand has 97 places, 132 transitions, 1505 flow. Second operand 4 states and 501 transitions. [2023-08-27 01:27:11,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 146 transitions, 1874 flow [2023-08-27 01:27:11,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 146 transitions, 1834 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 01:27:11,634 INFO L231 Difference]: Finished difference. Result has 97 places, 129 transitions, 1488 flow [2023-08-27 01:27:11,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1426, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1488, PETRI_PLACES=97, PETRI_TRANSITIONS=129} [2023-08-27 01:27:11,635 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 64 predicate places. [2023-08-27 01:27:11,635 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 129 transitions, 1488 flow [2023-08-27 01:27:11,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:11,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:11,635 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:11,642 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 01:27:11,840 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 01:27:11,840 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:11,840 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:11,840 INFO L85 PathProgramCache]: Analyzing trace with hash 577860451, now seen corresponding path program 4 times [2023-08-27 01:27:11,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:11,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540840287] [2023-08-27 01:27:11,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:11,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:12,168 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 01:27:12,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:12,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540840287] [2023-08-27 01:27:12,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540840287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:12,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983809810] [2023-08-27 01:27:12,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:27:12,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:12,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:12,170 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 01:27:12,172 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 01:27:12,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:27:12,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:12,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-27 01:27:12,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:12,317 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 01:27:12,317 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:12,335 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:12,335 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 01:27:12,361 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 01:27:12,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983809810] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:12,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-27 01:27:12,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 5] total 14 [2023-08-27 01:27:12,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234037822] [2023-08-27 01:27:12,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:12,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 01:27:12,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:12,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 01:27:12,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2023-08-27 01:27:12,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 317 [2023-08-27 01:27:12,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 129 transitions, 1488 flow. Second operand has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:12,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:12,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 317 [2023-08-27 01:27:12,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:12,510 INFO L124 PetriNetUnfolderBase]: 616/1132 cut-off events. [2023-08-27 01:27:12,510 INFO L125 PetriNetUnfolderBase]: For 7240/7278 co-relation queries the response was YES. [2023-08-27 01:27:12,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6633 conditions, 1132 events. 616/1132 cut-off events. For 7240/7278 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 5566 event pairs, 50 based on Foata normal form. 36/1167 useless extension candidates. Maximal degree in co-relation 6594. Up to 932 conditions per place. [2023-08-27 01:27:12,515 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 113 selfloop transitions, 29 changer transitions 0/144 dead transitions. [2023-08-27 01:27:12,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 144 transitions, 1864 flow [2023-08-27 01:27:12,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 01:27:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 01:27:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 500 transitions. [2023-08-27 01:27:12,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943217665615142 [2023-08-27 01:27:12,516 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 500 transitions. [2023-08-27 01:27:12,516 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 500 transitions. [2023-08-27 01:27:12,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:12,517 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 500 transitions. [2023-08-27 01:27:12,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:12,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:12,518 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 317.0) internal successors, (1585), 5 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:12,518 INFO L175 Difference]: Start difference. First operand has 97 places, 129 transitions, 1488 flow. Second operand 4 states and 500 transitions. [2023-08-27 01:27:12,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 144 transitions, 1864 flow [2023-08-27 01:27:12,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 144 transitions, 1806 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 01:27:12,533 INFO L231 Difference]: Finished difference. Result has 97 places, 127 transitions, 1460 flow [2023-08-27 01:27:12,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1460, PETRI_PLACES=97, PETRI_TRANSITIONS=127} [2023-08-27 01:27:12,533 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 64 predicate places. [2023-08-27 01:27:12,533 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 127 transitions, 1460 flow [2023-08-27 01:27:12,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.8) internal successors, (589), 5 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:12,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:12,533 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1] [2023-08-27 01:27:12,538 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 01:27:12,738 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 01:27:12,738 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:12,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:12,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1610853005, now seen corresponding path program 2 times [2023-08-27 01:27:12,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:12,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059527933] [2023-08-27 01:27:12,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:12,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:12,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 01:27:12,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:12,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059527933] [2023-08-27 01:27:12,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059527933] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:12,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538063325] [2023-08-27 01:27:12,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:27:12,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:12,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:12,853 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 01:27:12,856 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 01:27:12,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 01:27:12,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:12,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 01:27:12,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:12,949 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-08-27 01:27:12,949 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 01:27:12,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538063325] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:27:12,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 01:27:12,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [7] total 8 [2023-08-27 01:27:12,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221002382] [2023-08-27 01:27:12,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:27:12,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 01:27:12,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:12,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 01:27:12,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-08-27 01:27:12,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 317 [2023-08-27 01:27:12,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 127 transitions, 1460 flow. Second operand has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:12,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:12,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 317 [2023-08-27 01:27:12,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:13,080 INFO L124 PetriNetUnfolderBase]: 570/1049 cut-off events. [2023-08-27 01:27:13,081 INFO L125 PetriNetUnfolderBase]: For 6864/6902 co-relation queries the response was YES. [2023-08-27 01:27:13,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6055 conditions, 1049 events. 570/1049 cut-off events. For 6864/6902 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5129 event pairs, 269 based on Foata normal form. 73/1121 useless extension candidates. Maximal degree in co-relation 6016. Up to 1046 conditions per place. [2023-08-27 01:27:13,085 INFO L140 encePairwiseOnDemand]: 315/317 looper letters, 121 selfloop transitions, 1 changer transitions 0/124 dead transitions. [2023-08-27 01:27:13,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 124 transitions, 1653 flow [2023-08-27 01:27:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 01:27:13,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 01:27:13,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-08-27 01:27:13,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4332281808622503 [2023-08-27 01:27:13,086 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-08-27 01:27:13,086 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-08-27 01:27:13,086 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:13,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-08-27 01:27:13,087 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:13,088 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:13,088 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 317.0) internal successors, (1268), 4 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:13,088 INFO L175 Difference]: Start difference. First operand has 97 places, 127 transitions, 1460 flow. Second operand 3 states and 412 transitions. [2023-08-27 01:27:13,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 124 transitions, 1653 flow [2023-08-27 01:27:13,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 124 transitions, 1536 flow, removed 2 selfloop flow, removed 7 redundant places. [2023-08-27 01:27:13,099 INFO L231 Difference]: Finished difference. Result has 91 places, 124 transitions, 1294 flow [2023-08-27 01:27:13,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1292, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1294, PETRI_PLACES=91, PETRI_TRANSITIONS=124} [2023-08-27 01:27:13,100 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 58 predicate places. [2023-08-27 01:27:13,100 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 124 transitions, 1294 flow [2023-08-27 01:27:13,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 133.0) internal successors, (399), 3 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:13,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:13,100 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:13,123 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 01:27:13,323 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 01:27:13,324 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:13,324 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:13,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1731205168, now seen corresponding path program 2 times [2023-08-27 01:27:13,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:13,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009260380] [2023-08-27 01:27:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:13,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:13,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:13,662 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 01:27:13,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:13,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009260380] [2023-08-27 01:27:13,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009260380] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:13,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801390485] [2023-08-27 01:27:13,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:27:13,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:13,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:13,678 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 01:27:13,721 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 01:27:13,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:27:13,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:13,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-27 01:27:13,820 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:13,885 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 01:27:13,913 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:27:13,955 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:27:14,086 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 01:27:14,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:14,373 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:14,373 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 120 treesize of output 84 [2023-08-27 01:27:14,394 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-27 01:27:14,395 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 254 treesize of output 243 [2023-08-27 01:27:14,416 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-27 01:27:14,416 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 220 treesize of output 188 [2023-08-27 01:27:14,438 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-27 01:27:14,438 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 143 treesize of output 137 [2023-08-27 01:27:14,839 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 01:27:14,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801390485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:14,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:14,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 25 [2023-08-27 01:27:14,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607750693] [2023-08-27 01:27:14,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:14,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 01:27:14,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:14,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 01:27:14,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=565, Unknown=2, NotChecked=0, Total=702 [2023-08-27 01:27:14,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:27:14,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 124 transitions, 1294 flow. Second operand has 27 states, 27 states have (on average 94.33333333333333) internal successors, (2547), 27 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:14,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:14,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:27:14,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:16,038 INFO L124 PetriNetUnfolderBase]: 843/1490 cut-off events. [2023-08-27 01:27:16,039 INFO L125 PetriNetUnfolderBase]: For 7712/7760 co-relation queries the response was YES. [2023-08-27 01:27:16,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8187 conditions, 1490 events. 843/1490 cut-off events. For 7712/7760 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 7596 event pairs, 115 based on Foata normal form. 66/1553 useless extension candidates. Maximal degree in co-relation 8152. Up to 900 conditions per place. [2023-08-27 01:27:16,045 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 167 selfloop transitions, 97 changer transitions 2/268 dead transitions. [2023-08-27 01:27:16,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 268 transitions, 2890 flow [2023-08-27 01:27:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 01:27:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 01:27:16,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2868 transitions. [2023-08-27 01:27:16,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31197650386163384 [2023-08-27 01:27:16,066 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2868 transitions. [2023-08-27 01:27:16,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2868 transitions. [2023-08-27 01:27:16,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:16,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2868 transitions. [2023-08-27 01:27:16,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 98.89655172413794) internal successors, (2868), 29 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:16,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 317.0) internal successors, (9510), 30 states have internal predecessors, (9510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:16,074 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 317.0) internal successors, (9510), 30 states have internal predecessors, (9510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:16,074 INFO L175 Difference]: Start difference. First operand has 91 places, 124 transitions, 1294 flow. Second operand 29 states and 2868 transitions. [2023-08-27 01:27:16,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 268 transitions, 2890 flow [2023-08-27 01:27:16,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 268 transitions, 2889 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 01:27:16,098 INFO L231 Difference]: Finished difference. Result has 126 places, 179 transitions, 2265 flow [2023-08-27 01:27:16,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=1293, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2265, PETRI_PLACES=126, PETRI_TRANSITIONS=179} [2023-08-27 01:27:16,106 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 93 predicate places. [2023-08-27 01:27:16,106 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 179 transitions, 2265 flow [2023-08-27 01:27:16,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 94.33333333333333) internal successors, (2547), 27 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:16,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:16,107 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:16,113 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 01:27:16,311 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 01:27:16,311 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:16,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:16,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1462233814, now seen corresponding path program 1 times [2023-08-27 01:27:16,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:16,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553062724] [2023-08-27 01:27:16,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:16,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:16,709 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 01:27:16,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:16,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553062724] [2023-08-27 01:27:16,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553062724] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:16,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465952254] [2023-08-27 01:27:16,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:16,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:16,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:16,711 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 01:27:16,713 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 01:27:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:16,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 01:27:16,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:16,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:27:16,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:16,913 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 01:27:16,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:16,971 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 01:27:17,205 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 01:27:17,205 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:17,699 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:17,699 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 244 treesize of output 161 [2023-08-27 01:27:17,729 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:17,729 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 533 treesize of output 502 [2023-08-27 01:27:17,748 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:17,749 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 452 treesize of output 419 [2023-08-27 01:27:17,766 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:17,767 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 400 treesize of output 393 [2023-08-27 01:27:17,784 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:17,784 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 374 treesize of output 343 [2023-08-27 01:27:17,803 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:17,803 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 324 treesize of output 318 [2023-08-27 01:27:19,672 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 01:27:19,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465952254] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:19,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:19,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-27 01:27:19,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813851899] [2023-08-27 01:27:19,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:19,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 01:27:19,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:19,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 01:27:19,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=642, Unknown=1, NotChecked=0, Total=756 [2023-08-27 01:27:19,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:27:19,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 179 transitions, 2265 flow. Second operand has 28 states, 28 states have (on average 94.28571428571429) internal successors, (2640), 28 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:19,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:19,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:27:19,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:22,455 INFO L124 PetriNetUnfolderBase]: 1150/2004 cut-off events. [2023-08-27 01:27:22,456 INFO L125 PetriNetUnfolderBase]: For 14925/14989 co-relation queries the response was YES. [2023-08-27 01:27:22,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12385 conditions, 2004 events. 1150/2004 cut-off events. For 14925/14989 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 11128 event pairs, 160 based on Foata normal form. 86/2088 useless extension candidates. Maximal degree in co-relation 12341. Up to 1254 conditions per place. [2023-08-27 01:27:22,465 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 199 selfloop transitions, 130 changer transitions 4/335 dead transitions. [2023-08-27 01:27:22,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 335 transitions, 4224 flow [2023-08-27 01:27:22,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 01:27:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 01:27:22,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3058 transitions. [2023-08-27 01:27:22,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31118347410196395 [2023-08-27 01:27:22,468 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3058 transitions. [2023-08-27 01:27:22,468 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3058 transitions. [2023-08-27 01:27:22,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:22,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3058 transitions. [2023-08-27 01:27:22,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 98.64516129032258) internal successors, (3058), 31 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:22,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 317.0) internal successors, (10144), 32 states have internal predecessors, (10144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:22,476 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 317.0) internal successors, (10144), 32 states have internal predecessors, (10144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:22,476 INFO L175 Difference]: Start difference. First operand has 126 places, 179 transitions, 2265 flow. Second operand 31 states and 3058 transitions. [2023-08-27 01:27:22,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 335 transitions, 4224 flow [2023-08-27 01:27:22,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 335 transitions, 3861 flow, removed 165 selfloop flow, removed 7 redundant places. [2023-08-27 01:27:22,518 INFO L231 Difference]: Finished difference. Result has 158 places, 236 transitions, 3141 flow [2023-08-27 01:27:22,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=3141, PETRI_PLACES=158, PETRI_TRANSITIONS=236} [2023-08-27 01:27:22,518 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 125 predicate places. [2023-08-27 01:27:22,519 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 236 transitions, 3141 flow [2023-08-27 01:27:22,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 94.28571428571429) internal successors, (2640), 28 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:22,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:22,519 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:22,524 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 01:27:22,724 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 01:27:22,724 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:22,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:22,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1261855226, now seen corresponding path program 2 times [2023-08-27 01:27:22,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:22,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590896096] [2023-08-27 01:27:22,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:22,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:23,048 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 01:27:23,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:23,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590896096] [2023-08-27 01:27:23,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590896096] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:23,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452653934] [2023-08-27 01:27:23,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:27:23,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:23,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:23,049 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 01:27:23,051 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 01:27:23,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:27:23,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:23,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 01:27:23,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:23,197 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:27:23,226 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 6 treesize of output 5 [2023-08-27 01:27:23,247 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:27:23,337 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 01:27:23,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:23,533 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:23,534 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 01:27:23,542 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 01:27:23,542 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 152 treesize of output 140 [2023-08-27 01:27:23,550 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-27 01:27:23,550 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 135 treesize of output 109 [2023-08-27 01:27:23,557 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-27 01:27:23,557 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 84 treesize of output 71 [2023-08-27 01:27:23,653 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 01:27:23,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452653934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:23,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:23,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 23 [2023-08-27 01:27:23,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673157165] [2023-08-27 01:27:23,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:23,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 01:27:23,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:23,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 01:27:23,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=494, Unknown=2, NotChecked=0, Total=600 [2023-08-27 01:27:23,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:27:23,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 236 transitions, 3141 flow. Second operand has 25 states, 25 states have (on average 94.44) internal successors, (2361), 25 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:23,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:23,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:27:23,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:24,750 INFO L124 PetriNetUnfolderBase]: 1155/1999 cut-off events. [2023-08-27 01:27:24,750 INFO L125 PetriNetUnfolderBase]: For 15202/15273 co-relation queries the response was YES. [2023-08-27 01:27:24,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12902 conditions, 1999 events. 1155/1999 cut-off events. For 15202/15273 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 10795 event pairs, 306 based on Foata normal form. 72/2054 useless extension candidates. Maximal degree in co-relation 12851. Up to 1333 conditions per place. [2023-08-27 01:27:24,760 INFO L140 encePairwiseOnDemand]: 307/317 looper letters, 197 selfloop transitions, 91 changer transitions 4/294 dead transitions. [2023-08-27 01:27:24,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 294 transitions, 4187 flow [2023-08-27 01:27:24,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 01:27:24,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 01:27:24,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1689 transitions. [2023-08-27 01:27:24,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3134162182223047 [2023-08-27 01:27:24,763 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1689 transitions. [2023-08-27 01:27:24,763 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1689 transitions. [2023-08-27 01:27:24,763 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:24,763 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1689 transitions. [2023-08-27 01:27:24,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 99.3529411764706) internal successors, (1689), 17 states have internal predecessors, (1689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:24,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 317.0) internal successors, (5706), 18 states have internal predecessors, (5706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:24,767 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 317.0) internal successors, (5706), 18 states have internal predecessors, (5706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:24,767 INFO L175 Difference]: Start difference. First operand has 158 places, 236 transitions, 3141 flow. Second operand 17 states and 1689 transitions. [2023-08-27 01:27:24,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 294 transitions, 4187 flow [2023-08-27 01:27:24,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 294 transitions, 3699 flow, removed 223 selfloop flow, removed 10 redundant places. [2023-08-27 01:27:24,833 INFO L231 Difference]: Finished difference. Result has 166 places, 248 transitions, 3161 flow [2023-08-27 01:27:24,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=2768, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3161, PETRI_PLACES=166, PETRI_TRANSITIONS=248} [2023-08-27 01:27:24,834 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 133 predicate places. [2023-08-27 01:27:24,834 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 248 transitions, 3161 flow [2023-08-27 01:27:24,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 94.44) internal successors, (2361), 25 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:24,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:24,834 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:24,841 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 01:27:25,039 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 01:27:25,039 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:25,040 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:25,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2119440311, now seen corresponding path program 1 times [2023-08-27 01:27:25,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:25,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713113729] [2023-08-27 01:27:25,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:25,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:25,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:25,118 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 01:27:25,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:25,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713113729] [2023-08-27 01:27:25,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713113729] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:25,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972359372] [2023-08-27 01:27:25,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:25,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:25,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:25,120 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 01:27:25,148 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 01:27:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:25,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 01:27:25,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:25,252 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 01:27:25,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:25,315 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 01:27:25,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972359372] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:25,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:25,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 5] total 9 [2023-08-27 01:27:25,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905043839] [2023-08-27 01:27:25,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:25,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 01:27:25,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:25,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 01:27:25,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-08-27 01:27:25,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 317 [2023-08-27 01:27:25,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 248 transitions, 3161 flow. Second operand has 11 states, 11 states have (on average 132.36363636363637) internal successors, (1456), 11 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:25,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:25,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 317 [2023-08-27 01:27:25,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:25,642 INFO L124 PetriNetUnfolderBase]: 1279/2216 cut-off events. [2023-08-27 01:27:25,643 INFO L125 PetriNetUnfolderBase]: For 16890/16956 co-relation queries the response was YES. [2023-08-27 01:27:25,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13475 conditions, 2216 events. 1279/2216 cut-off events. For 16890/16956 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12175 event pairs, 134 based on Foata normal form. 144/2303 useless extension candidates. Maximal degree in co-relation 13421. Up to 809 conditions per place. [2023-08-27 01:27:25,656 INFO L140 encePairwiseOnDemand]: 310/317 looper letters, 117 selfloop transitions, 172 changer transitions 13/304 dead transitions. [2023-08-27 01:27:25,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 304 transitions, 4230 flow [2023-08-27 01:27:25,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 01:27:25,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 01:27:25,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 710 transitions. [2023-08-27 01:27:25,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4479495268138801 [2023-08-27 01:27:25,657 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 710 transitions. [2023-08-27 01:27:25,657 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 710 transitions. [2023-08-27 01:27:25,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:25,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 710 transitions. [2023-08-27 01:27:25,658 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 142.0) internal successors, (710), 5 states have internal predecessors, (710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:25,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:25,659 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 317.0) internal successors, (1902), 6 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:25,659 INFO L175 Difference]: Start difference. First operand has 166 places, 248 transitions, 3161 flow. Second operand 5 states and 710 transitions. [2023-08-27 01:27:25,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 304 transitions, 4230 flow [2023-08-27 01:27:25,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 304 transitions, 4093 flow, removed 43 selfloop flow, removed 9 redundant places. [2023-08-27 01:27:25,707 INFO L231 Difference]: Finished difference. Result has 162 places, 262 transitions, 3641 flow [2023-08-27 01:27:25,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3641, PETRI_PLACES=162, PETRI_TRANSITIONS=262} [2023-08-27 01:27:25,707 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 129 predicate places. [2023-08-27 01:27:25,707 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 262 transitions, 3641 flow [2023-08-27 01:27:25,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 132.36363636363637) internal successors, (1456), 11 states have internal predecessors, (1456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:25,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:25,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:25,716 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 01:27:25,913 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 01:27:25,913 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:25,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:25,913 INFO L85 PathProgramCache]: Analyzing trace with hash 260853148, now seen corresponding path program 3 times [2023-08-27 01:27:25,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:25,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148788317] [2023-08-27 01:27:25,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:25,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:26,295 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 01:27:26,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:26,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148788317] [2023-08-27 01:27:26,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148788317] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:26,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066017689] [2023-08-27 01:27:26,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:27:26,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:26,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:26,297 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 01:27:26,298 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 01:27:26,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:27:26,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:26,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 01:27:26,394 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:27:26,492 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:26,586 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-27 01:27:26,586 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 37 [2023-08-27 01:27:26,600 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 01:27:26,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066017689] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:26,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:26,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 18 [2023-08-27 01:27:26,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598715284] [2023-08-27 01:27:26,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:26,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:27:26,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:26,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:27:26,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:27:26,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 01:27:26,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 262 transitions, 3641 flow. Second operand has 20 states, 20 states have (on average 101.5) internal successors, (2030), 20 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:26,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:26,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 01:27:26,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:27,807 INFO L124 PetriNetUnfolderBase]: 1797/2998 cut-off events. [2023-08-27 01:27:27,807 INFO L125 PetriNetUnfolderBase]: For 32012/32078 co-relation queries the response was YES. [2023-08-27 01:27:27,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21055 conditions, 2998 events. 1797/2998 cut-off events. For 32012/32078 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 16601 event pairs, 178 based on Foata normal form. 134/3073 useless extension candidates. Maximal degree in co-relation 21002. Up to 1690 conditions per place. [2023-08-27 01:27:27,821 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 236 selfloop transitions, 313 changer transitions 4/555 dead transitions. [2023-08-27 01:27:27,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 555 transitions, 8375 flow [2023-08-27 01:27:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 01:27:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 01:27:27,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3275 transitions. [2023-08-27 01:27:27,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3332654930294088 [2023-08-27 01:27:27,826 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3275 transitions. [2023-08-27 01:27:27,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3275 transitions. [2023-08-27 01:27:27,826 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:27,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3275 transitions. [2023-08-27 01:27:27,829 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 105.64516129032258) internal successors, (3275), 31 states have internal predecessors, (3275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:27,833 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 317.0) internal successors, (10144), 32 states have internal predecessors, (10144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:27,834 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 317.0) internal successors, (10144), 32 states have internal predecessors, (10144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:27,834 INFO L175 Difference]: Start difference. First operand has 162 places, 262 transitions, 3641 flow. Second operand 31 states and 3275 transitions. [2023-08-27 01:27:27,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 555 transitions, 8375 flow [2023-08-27 01:27:27,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 555 transitions, 7825 flow, removed 213 selfloop flow, removed 3 redundant places. [2023-08-27 01:27:27,937 INFO L231 Difference]: Finished difference. Result has 193 places, 468 transitions, 7335 flow [2023-08-27 01:27:27,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=3450, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=7335, PETRI_PLACES=193, PETRI_TRANSITIONS=468} [2023-08-27 01:27:27,937 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 160 predicate places. [2023-08-27 01:27:27,937 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 468 transitions, 7335 flow [2023-08-27 01:27:27,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 101.5) internal successors, (2030), 20 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:27,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:27,938 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:27,942 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 01:27:28,142 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 01:27:28,143 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:28,143 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:28,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1261841276, now seen corresponding path program 3 times [2023-08-27 01:27:28,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:28,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051789698] [2023-08-27 01:27:28,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:28,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:28,429 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 01:27:28,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:28,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051789698] [2023-08-27 01:27:28,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051789698] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:28,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877838807] [2023-08-27 01:27:28,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:27:28,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:28,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:28,430 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 01:27:28,461 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 01:27:28,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:27:28,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:28,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 01:27:28,565 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:28,706 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 01:27:28,706 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:28,743 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:28,743 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 01:27:28,869 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 01:27:28,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877838807] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:28,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:28,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2023-08-27 01:27:28,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848418214] [2023-08-27 01:27:28,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:28,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 01:27:28,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:28,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 01:27:28,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2023-08-27 01:27:28,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 01:27:28,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 468 transitions, 7335 flow. Second operand has 24 states, 24 states have (on average 101.5) internal successors, (2436), 24 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:28,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:28,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 01:27:28,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:29,776 INFO L124 PetriNetUnfolderBase]: 1775/2966 cut-off events. [2023-08-27 01:27:29,777 INFO L125 PetriNetUnfolderBase]: For 26846/26882 co-relation queries the response was YES. [2023-08-27 01:27:29,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22225 conditions, 2966 events. 1775/2966 cut-off events. For 26846/26882 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 16316 event pairs, 490 based on Foata normal form. 32/2905 useless extension candidates. Maximal degree in co-relation 22165. Up to 2520 conditions per place. [2023-08-27 01:27:29,794 INFO L140 encePairwiseOnDemand]: 307/317 looper letters, 443 selfloop transitions, 57 changer transitions 1/503 dead transitions. [2023-08-27 01:27:29,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 503 transitions, 8340 flow [2023-08-27 01:27:29,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 01:27:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 01:27:29,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2306 transitions. [2023-08-27 01:27:29,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3306567249784915 [2023-08-27 01:27:29,800 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2306 transitions. [2023-08-27 01:27:29,800 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2306 transitions. [2023-08-27 01:27:29,801 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:29,801 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2306 transitions. [2023-08-27 01:27:29,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 104.81818181818181) internal successors, (2306), 22 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 01:27:29,806 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 317.0) internal successors, (7291), 23 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:29,806 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 317.0) internal successors, (7291), 23 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:29,806 INFO L175 Difference]: Start difference. First operand has 193 places, 468 transitions, 7335 flow. Second operand 22 states and 2306 transitions. [2023-08-27 01:27:29,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 503 transitions, 8340 flow [2023-08-27 01:27:29,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 503 transitions, 7664 flow, removed 312 selfloop flow, removed 7 redundant places. [2023-08-27 01:27:29,970 INFO L231 Difference]: Finished difference. Result has 207 places, 461 transitions, 6662 flow [2023-08-27 01:27:29,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=6565, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6662, PETRI_PLACES=207, PETRI_TRANSITIONS=461} [2023-08-27 01:27:29,970 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 174 predicate places. [2023-08-27 01:27:29,970 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 461 transitions, 6662 flow [2023-08-27 01:27:29,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 101.5) internal successors, (2436), 24 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:29,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:29,971 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:29,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-08-27 01:27:30,175 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 01:27:30,176 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:30,176 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:30,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1261841314, now seen corresponding path program 4 times [2023-08-27 01:27:30,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:30,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356067125] [2023-08-27 01:27:30,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:30,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:30,495 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 01:27:30,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:30,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356067125] [2023-08-27 01:27:30,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356067125] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:30,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365020208] [2023-08-27 01:27:30,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:27:30,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:30,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:30,496 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 01:27:30,498 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 01:27:30,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:27:30,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:30,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-27 01:27:30,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:30,615 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 01:27:30,646 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 01:27:30,682 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:27:30,702 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:27:30,813 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 01:27:30,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:31,133 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:31,134 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 152 treesize of output 97 [2023-08-27 01:27:31,155 INFO L322 Elim1Store]: treesize reduction 13, result has 64.9 percent of original size [2023-08-27 01:27:31,155 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 538 treesize of output 493 [2023-08-27 01:27:31,164 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:27:31,165 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:27:31,173 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:31,173 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 170 treesize of output 164 [2023-08-27 01:27:31,193 INFO L322 Elim1Store]: treesize reduction 16, result has 56.8 percent of original size [2023-08-27 01:27:31,193 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 169 treesize of output 137 [2023-08-27 01:27:31,486 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 01:27:31,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365020208] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:31,486 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:31,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-27 01:27:31,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87026964] [2023-08-27 01:27:31,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:31,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 01:27:31,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:31,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 01:27:31,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=596, Unknown=2, NotChecked=0, Total=756 [2023-08-27 01:27:31,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:27:31,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 461 transitions, 6662 flow. Second operand has 28 states, 28 states have (on average 94.28571428571429) internal successors, (2640), 28 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:31,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:31,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:27:31,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:33,432 INFO L124 PetriNetUnfolderBase]: 2067/3376 cut-off events. [2023-08-27 01:27:33,432 INFO L125 PetriNetUnfolderBase]: For 24901/24937 co-relation queries the response was YES. [2023-08-27 01:27:33,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23950 conditions, 3376 events. 2067/3376 cut-off events. For 24901/24937 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18412 event pairs, 187 based on Foata normal form. 58/3245 useless extension candidates. Maximal degree in co-relation 23890. Up to 2370 conditions per place. [2023-08-27 01:27:33,454 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 379 selfloop transitions, 277 changer transitions 6/664 dead transitions. [2023-08-27 01:27:33,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 664 transitions, 10101 flow [2023-08-27 01:27:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 01:27:33,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 01:27:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3136 transitions. [2023-08-27 01:27:33,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30914826498422715 [2023-08-27 01:27:33,458 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3136 transitions. [2023-08-27 01:27:33,458 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3136 transitions. [2023-08-27 01:27:33,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:33,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3136 transitions. [2023-08-27 01:27:33,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 98.0) internal successors, (3136), 32 states have internal predecessors, (3136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:33,466 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 317.0) internal successors, (10461), 33 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:33,467 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 317.0) internal successors, (10461), 33 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:33,467 INFO L175 Difference]: Start difference. First operand has 207 places, 461 transitions, 6662 flow. Second operand 32 states and 3136 transitions. [2023-08-27 01:27:33,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 664 transitions, 10101 flow [2023-08-27 01:27:33,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 664 transitions, 9970 flow, removed 39 selfloop flow, removed 12 redundant places. [2023-08-27 01:27:33,618 INFO L231 Difference]: Finished difference. Result has 232 places, 572 transitions, 9149 flow [2023-08-27 01:27:33,618 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=6521, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9149, PETRI_PLACES=232, PETRI_TRANSITIONS=572} [2023-08-27 01:27:33,619 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 199 predicate places. [2023-08-27 01:27:33,619 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 572 transitions, 9149 flow [2023-08-27 01:27:33,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 94.28571428571429) internal successors, (2640), 28 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:33,619 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:33,619 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:33,626 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 01:27:33,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:33,825 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:33,825 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:33,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1261855264, now seen corresponding path program 5 times [2023-08-27 01:27:33,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:33,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005552311] [2023-08-27 01:27:33,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:33,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:34,113 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 01:27:34,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:34,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005552311] [2023-08-27 01:27:34,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005552311] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:34,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710035785] [2023-08-27 01:27:34,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:27:34,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:34,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:34,116 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 01:27:34,118 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 01:27:34,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:27:34,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:34,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 01:27:34,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:34,321 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 01:27:34,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:34,388 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:34,388 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 51 [2023-08-27 01:27:34,425 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 01:27:34,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710035785] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:34,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:34,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 18 [2023-08-27 01:27:34,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133403441] [2023-08-27 01:27:34,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:34,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:27:34,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:34,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:27:34,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:27:34,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 01:27:34,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 572 transitions, 9149 flow. Second operand has 20 states, 20 states have (on average 101.5) internal successors, (2030), 20 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:34,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:34,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 01:27:34,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:35,558 INFO L124 PetriNetUnfolderBase]: 1959/3252 cut-off events. [2023-08-27 01:27:35,559 INFO L125 PetriNetUnfolderBase]: For 33079/33115 co-relation queries the response was YES. [2023-08-27 01:27:35,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25507 conditions, 3252 events. 1959/3252 cut-off events. For 33079/33115 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18107 event pairs, 231 based on Foata normal form. 160/3272 useless extension candidates. Maximal degree in co-relation 25439. Up to 1926 conditions per place. [2023-08-27 01:27:35,580 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 349 selfloop transitions, 246 changer transitions 5/602 dead transitions. [2023-08-27 01:27:35,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 602 transitions, 10411 flow [2023-08-27 01:27:35,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 01:27:35,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 01:27:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2114 transitions. [2023-08-27 01:27:35,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33343848580441643 [2023-08-27 01:27:35,582 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2114 transitions. [2023-08-27 01:27:35,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2114 transitions. [2023-08-27 01:27:35,582 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:35,582 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2114 transitions. [2023-08-27 01:27:35,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 105.7) internal successors, (2114), 20 states have internal predecessors, (2114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:35,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 317.0) internal successors, (6657), 21 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:35,614 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 317.0) internal successors, (6657), 21 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:35,615 INFO L175 Difference]: Start difference. First operand has 232 places, 572 transitions, 9149 flow. Second operand 20 states and 2114 transitions. [2023-08-27 01:27:35,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 602 transitions, 10411 flow [2023-08-27 01:27:35,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 602 transitions, 10084 flow, removed 116 selfloop flow, removed 18 redundant places. [2023-08-27 01:27:35,809 INFO L231 Difference]: Finished difference. Result has 234 places, 529 transitions, 8993 flow [2023-08-27 01:27:35,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=7715, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=8993, PETRI_PLACES=234, PETRI_TRANSITIONS=529} [2023-08-27 01:27:35,810 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 201 predicate places. [2023-08-27 01:27:35,810 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 529 transitions, 8993 flow [2023-08-27 01:27:35,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 101.5) internal successors, (2030), 20 states have internal predecessors, (2030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:35,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:35,810 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:35,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-08-27 01:27:36,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:36,015 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:36,016 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:36,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1263509215, now seen corresponding path program 1 times [2023-08-27 01:27:36,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:36,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830565329] [2023-08-27 01:27:36,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:36,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:36,319 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 01:27:36,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:36,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830565329] [2023-08-27 01:27:36,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830565329] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:36,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756313363] [2023-08-27 01:27:36,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:36,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:36,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:36,321 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 01:27:36,321 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 01:27:36,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:36,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 01:27:36,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:36,453 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 01:27:36,489 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-08-27 01:27:36,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:36,525 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 01:27:36,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:36,594 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 14 treesize of output 16 [2023-08-27 01:27:36,701 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 01:27:36,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:36,957 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:36,957 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 114 treesize of output 79 [2023-08-27 01:27:36,972 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:36,972 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 193 treesize of output 205 [2023-08-27 01:27:36,983 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:36,983 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 116 [2023-08-27 01:27:36,999 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:36,999 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 136 treesize of output 114 [2023-08-27 01:27:37,820 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 01:27:37,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756313363] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:37,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:37,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 25 [2023-08-27 01:27:37,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885451120] [2023-08-27 01:27:37,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:37,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 01:27:37,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:37,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 01:27:37,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=602, Unknown=3, NotChecked=0, Total=702 [2023-08-27 01:27:37,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:27:37,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 529 transitions, 8993 flow. Second operand has 27 states, 27 states have (on average 94.33333333333333) internal successors, (2547), 27 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:37,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:37,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:27:37,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:40,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:27:42,360 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:27:44,473 WARN L539 Checker$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 01:27:46,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:27:47,937 INFO L124 PetriNetUnfolderBase]: 1993/3315 cut-off events. [2023-08-27 01:27:47,938 INFO L125 PetriNetUnfolderBase]: For 37003/37039 co-relation queries the response was YES. [2023-08-27 01:27:47,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26608 conditions, 3315 events. 1993/3315 cut-off events. For 37003/37039 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18574 event pairs, 507 based on Foata normal form. 46/3281 useless extension candidates. Maximal degree in co-relation 26540. Up to 2839 conditions per place. [2023-08-27 01:27:47,960 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 515 selfloop transitions, 83 changer transitions 1/601 dead transitions. [2023-08-27 01:27:47,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 601 transitions, 10573 flow [2023-08-27 01:27:47,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 01:27:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 01:27:47,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2364 transitions. [2023-08-27 01:27:47,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3107255520504732 [2023-08-27 01:27:47,964 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2364 transitions. [2023-08-27 01:27:47,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2364 transitions. [2023-08-27 01:27:47,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:27:47,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2364 transitions. [2023-08-27 01:27:47,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 98.5) internal successors, (2364), 24 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:48,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 317.0) internal successors, (7925), 25 states have internal predecessors, (7925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:48,042 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 317.0) internal successors, (7925), 25 states have internal predecessors, (7925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:48,042 INFO L175 Difference]: Start difference. First operand has 234 places, 529 transitions, 8993 flow. Second operand 24 states and 2364 transitions. [2023-08-27 01:27:48,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 601 transitions, 10573 flow [2023-08-27 01:27:48,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 601 transitions, 10290 flow, removed 114 selfloop flow, removed 9 redundant places. [2023-08-27 01:27:48,215 INFO L231 Difference]: Finished difference. Result has 248 places, 542 transitions, 9127 flow [2023-08-27 01:27:48,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=8703, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=9127, PETRI_PLACES=248, PETRI_TRANSITIONS=542} [2023-08-27 01:27:48,216 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 215 predicate places. [2023-08-27 01:27:48,216 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 542 transitions, 9127 flow [2023-08-27 01:27:48,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 94.33333333333333) internal successors, (2547), 27 states have internal predecessors, (2547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:48,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:27:48,216 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:27:48,221 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 01:27:48,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:48,421 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:27:48,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:27:48,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1263777334, now seen corresponding path program 6 times [2023-08-27 01:27:48,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:27:48,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838198055] [2023-08-27 01:27:48,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:27:48,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:27:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:27:48,906 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 01:27:48,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:27:48,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838198055] [2023-08-27 01:27:48,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838198055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:27:48,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824799557] [2023-08-27 01:27:48,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:27:48,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:27:48,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:27:48,907 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 01:27:48,909 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 01:27:49,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 01:27:49,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:27:49,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 01:27:49,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:27:49,070 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:27:49,094 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:27:49,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:27:49,158 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 01:27:49,247 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 01:27:49,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:27:49,473 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:49,474 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 117 treesize of output 81 [2023-08-27 01:27:49,489 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:49,490 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 416 treesize of output 392 [2023-08-27 01:27:49,509 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:49,509 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 130 treesize of output 140 [2023-08-27 01:27:49,521 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:27:49,521 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 111 treesize of output 89 [2023-08-27 01:27:50,142 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 01:27:50,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824799557] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:27:50,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:27:50,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 27 [2023-08-27 01:27:50,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428389176] [2023-08-27 01:27:50,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:27:50,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 01:27:50,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:27:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 01:27:50,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=682, Unknown=4, NotChecked=0, Total=812 [2023-08-27 01:27:50,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:27:50,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 542 transitions, 9127 flow. Second operand has 29 states, 29 states have (on average 94.24137931034483) internal successors, (2733), 29 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:27:50,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:27:50,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:27:50,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:27:52,290 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 01:28:00,640 WARN L234 SmtUtils]: Spent 8.13s on a formula simplification that was a NOOP. DAG size: 61 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:28:02,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:05,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:06,338 INFO L124 PetriNetUnfolderBase]: 2138/3512 cut-off events. [2023-08-27 01:28:06,339 INFO L125 PetriNetUnfolderBase]: For 39532/39568 co-relation queries the response was YES. [2023-08-27 01:28:06,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28071 conditions, 3512 events. 2138/3512 cut-off events. For 39532/39568 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 19580 event pairs, 237 based on Foata normal form. 62/3474 useless extension candidates. Maximal degree in co-relation 27998. Up to 2921 conditions per place. [2023-08-27 01:28:06,365 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 523 selfloop transitions, 112 changer transitions 6/643 dead transitions. [2023-08-27 01:28:06,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 643 transitions, 11282 flow [2023-08-27 01:28:06,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 01:28:06,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 01:28:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2752 transitions. [2023-08-27 01:28:06,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3100495718792249 [2023-08-27 01:28:06,372 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2752 transitions. [2023-08-27 01:28:06,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2752 transitions. [2023-08-27 01:28:06,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:28:06,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2752 transitions. [2023-08-27 01:28:06,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 98.28571428571429) internal successors, (2752), 28 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:06,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 317.0) internal successors, (9193), 29 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:06,383 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 317.0) internal successors, (9193), 29 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:06,383 INFO L175 Difference]: Start difference. First operand has 248 places, 542 transitions, 9127 flow. Second operand 28 states and 2752 transitions. [2023-08-27 01:28:06,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 643 transitions, 11282 flow [2023-08-27 01:28:06,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 643 transitions, 11154 flow, removed 38 selfloop flow, removed 10 redundant places. [2023-08-27 01:28:06,588 INFO L231 Difference]: Finished difference. Result has 267 places, 555 transitions, 9522 flow [2023-08-27 01:28:06,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=8963, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=9522, PETRI_PLACES=267, PETRI_TRANSITIONS=555} [2023-08-27 01:28:06,589 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 234 predicate places. [2023-08-27 01:28:06,589 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 555 transitions, 9522 flow [2023-08-27 01:28:06,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 94.24137931034483) internal successors, (2733), 29 states have internal predecessors, (2733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:06,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:28:06,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:28:06,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-08-27 01:28:06,794 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,SelfDestructingSolverStorable36 [2023-08-27 01:28:06,795 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:28:06,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:28:06,795 INFO L85 PathProgramCache]: Analyzing trace with hash -417415062, now seen corresponding path program 4 times [2023-08-27 01:28:06,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:28:06,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364685208] [2023-08-27 01:28:06,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:28:06,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:28:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:28:07,158 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 01:28:07,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:28:07,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364685208] [2023-08-27 01:28:07,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364685208] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:28:07,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577455241] [2023-08-27 01:28:07,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:28:07,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:28:07,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:28:07,159 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 01:28:07,161 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 01:28:07,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:28:07,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:28:07,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 01:28:07,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:28:07,336 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 01:28:07,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:28:07,375 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 01:28:07,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:28:07,487 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 25 treesize of output 25 [2023-08-27 01:28:07,579 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 01:28:07,579 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:28:07,640 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1165 (Array Int Int))) (< 0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1165) c_~q~0.base)) (.cse1 (* c_~q_front~0 4))) (+ 2147483649 (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 (+ .cse1 c_~q~0.offset)))))) is different from false [2023-08-27 01:28:07,778 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:28:07,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 63 [2023-08-27 01:28:07,799 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:28:07,799 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 166 [2023-08-27 01:28:07,804 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 01:28:07,817 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:28:07,817 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 63 [2023-08-27 01:28:08,274 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 01:28:08,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577455241] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:28:08,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:28:08,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2023-08-27 01:28:08,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913852798] [2023-08-27 01:28:08,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:28:08,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 01:28:08,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:28:08,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 01:28:08,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=613, Unknown=1, NotChecked=50, Total=756 [2023-08-27 01:28:08,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:28:08,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 555 transitions, 9522 flow. Second operand has 28 states, 28 states have (on average 94.28571428571429) internal successors, (2640), 28 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:08,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:28:08,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:28:08,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:28:08,881 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (forall ((v_ArrVal_1165 (Array Int Int))) (< 0 (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1165) c_~q~0.base)) (.cse2 (* c_~q_front~0 4))) (+ 2147483649 (select .cse1 (+ .cse2 c_~q~0.offset 4)) (select .cse1 (+ .cse2 c_~q~0.offset)))))))) (and .cse0 (or .cse0 (< c_~q_back~0 0) (<= c_~n~0 c_~q_back~0)))) is different from false [2023-08-27 01:28:10,533 INFO L124 PetriNetUnfolderBase]: 2340/3799 cut-off events. [2023-08-27 01:28:10,533 INFO L125 PetriNetUnfolderBase]: For 47666/47702 co-relation queries the response was YES. [2023-08-27 01:28:10,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30860 conditions, 3799 events. 2340/3799 cut-off events. For 47666/47702 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21399 event pairs, 508 based on Foata normal form. 54/3753 useless extension candidates. Maximal degree in co-relation 30783. Up to 3249 conditions per place. [2023-08-27 01:28:10,560 INFO L140 encePairwiseOnDemand]: 304/317 looper letters, 576 selfloop transitions, 99 changer transitions 7/684 dead transitions. [2023-08-27 01:28:10,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 684 transitions, 12041 flow [2023-08-27 01:28:10,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 01:28:10,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 01:28:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2856 transitions. [2023-08-27 01:28:10,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3106711628412923 [2023-08-27 01:28:10,563 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2856 transitions. [2023-08-27 01:28:10,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2856 transitions. [2023-08-27 01:28:10,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:28:10,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2856 transitions. [2023-08-27 01:28:10,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 98.48275862068965) internal successors, (2856), 29 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:10,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 317.0) internal successors, (9510), 30 states have internal predecessors, (9510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:10,569 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 317.0) internal successors, (9510), 30 states have internal predecessors, (9510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:10,569 INFO L175 Difference]: Start difference. First operand has 267 places, 555 transitions, 9522 flow. Second operand 29 states and 2856 transitions. [2023-08-27 01:28:10,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 684 transitions, 12041 flow [2023-08-27 01:28:10,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 684 transitions, 11699 flow, removed 124 selfloop flow, removed 10 redundant places. [2023-08-27 01:28:10,794 INFO L231 Difference]: Finished difference. Result has 286 places, 581 transitions, 9931 flow [2023-08-27 01:28:10,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=9194, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9931, PETRI_PLACES=286, PETRI_TRANSITIONS=581} [2023-08-27 01:28:10,794 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 253 predicate places. [2023-08-27 01:28:10,794 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 581 transitions, 9931 flow [2023-08-27 01:28:10,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 94.28571428571429) internal successors, (2640), 28 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:10,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:28:10,795 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:28:10,801 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 01:28:10,999 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,SelfDestructingSolverStorable37 [2023-08-27 01:28:11,000 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:28:11,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:28:11,000 INFO L85 PathProgramCache]: Analyzing trace with hash 47814428, now seen corresponding path program 5 times [2023-08-27 01:28:11,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:28:11,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616047405] [2023-08-27 01:28:11,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:28:11,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:28:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:28:11,399 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 01:28:11,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:28:11,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616047405] [2023-08-27 01:28:11,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616047405] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:28:11,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300045971] [2023-08-27 01:28:11,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:28:11,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:28:11,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:28:11,400 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 01:28:11,402 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 01:28:11,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 01:28:11,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:28:11,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 01:28:11,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:28:11,641 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 01:28:11,641 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:28:11,754 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:28:11,755 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 73 [2023-08-27 01:28:11,818 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 01:28:11,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300045971] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:28:11,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:28:11,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 5] total 19 [2023-08-27 01:28:11,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472994003] [2023-08-27 01:28:11,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:28:11,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 01:28:11,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:28:11,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 01:28:11,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2023-08-27 01:28:11,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 01:28:11,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 581 transitions, 9931 flow. Second operand has 21 states, 21 states have (on average 101.52380952380952) internal successors, (2132), 21 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:11,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:28:11,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 01:28:11,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:28:13,041 INFO L124 PetriNetUnfolderBase]: 2320/3876 cut-off events. [2023-08-27 01:28:13,041 INFO L125 PetriNetUnfolderBase]: For 59146/59182 co-relation queries the response was YES. [2023-08-27 01:28:13,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31946 conditions, 3876 events. 2320/3876 cut-off events. For 59146/59182 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 22766 event pairs, 200 based on Foata normal form. 356/4202 useless extension candidates. Maximal degree in co-relation 31864. Up to 1907 conditions per place. [2023-08-27 01:28:13,071 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 395 selfloop transitions, 298 changer transitions 2/697 dead transitions. [2023-08-27 01:28:13,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 697 transitions, 12612 flow [2023-08-27 01:28:13,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-27 01:28:13,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-27 01:28:13,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2356 transitions. [2023-08-27 01:28:13,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33782621164324633 [2023-08-27 01:28:13,074 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2356 transitions. [2023-08-27 01:28:13,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2356 transitions. [2023-08-27 01:28:13,074 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:28:13,074 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2356 transitions. [2023-08-27 01:28:13,076 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 107.0909090909091) internal successors, (2356), 22 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:13,078 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 317.0) internal successors, (7291), 23 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:13,079 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 317.0) internal successors, (7291), 23 states have internal predecessors, (7291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:13,079 INFO L175 Difference]: Start difference. First operand has 286 places, 581 transitions, 9931 flow. Second operand 22 states and 2356 transitions. [2023-08-27 01:28:13,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 697 transitions, 12612 flow [2023-08-27 01:28:13,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 697 transitions, 12262 flow, removed 121 selfloop flow, removed 18 redundant places. [2023-08-27 01:28:13,339 INFO L231 Difference]: Finished difference. Result has 289 places, 547 transitions, 10087 flow [2023-08-27 01:28:13,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=8352, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=259, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=10087, PETRI_PLACES=289, PETRI_TRANSITIONS=547} [2023-08-27 01:28:13,340 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 256 predicate places. [2023-08-27 01:28:13,340 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 547 transitions, 10087 flow [2023-08-27 01:28:13,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.52380952380952) internal successors, (2132), 21 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:13,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:28:13,341 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:28:13,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-08-27 01:28:13,545 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,SelfDestructingSolverStorable38 [2023-08-27 01:28:13,545 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:28:13,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:28:13,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1266184174, now seen corresponding path program 7 times [2023-08-27 01:28:13,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:28:13,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001389391] [2023-08-27 01:28:13,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:28:13,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:28:13,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:28:14,003 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 01:28:14,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:28:14,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001389391] [2023-08-27 01:28:14,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001389391] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:28:14,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671653064] [2023-08-27 01:28:14,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:28:14,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:28:14,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:28:14,004 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 01:28:14,006 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 01:28:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:28:14,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 01:28:14,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:28:14,121 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 98 treesize of output 94 [2023-08-27 01:28:14,198 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 01:28:14,283 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 01:28:14,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:28:14,422 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:28:14,423 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 96 treesize of output 98 [2023-08-27 01:28:14,433 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:28:14,434 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 48 treesize of output 46 [2023-08-27 01:28:14,514 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 01:28:14,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671653064] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:28:14,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:28:14,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 22 [2023-08-27 01:28:14,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637571622] [2023-08-27 01:28:14,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:28:14,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 01:28:14,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:28:14,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 01:28:14,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=479, Unknown=7, NotChecked=0, Total=552 [2023-08-27 01:28:14,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 01:28:14,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 547 transitions, 10087 flow. Second operand has 24 states, 24 states have (on average 97.33333333333333) internal successors, (2336), 24 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:14,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:28:14,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 01:28:14,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:28:23,079 WARN L234 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 65 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:28:25,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:27,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:35,813 WARN L234 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 68 DAG size of output: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:28:44,121 WARN L234 SmtUtils]: Spent 8.22s on a formula simplification. DAG size of input: 70 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:28:46,804 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:48,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:51,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:28:52,135 INFO L124 PetriNetUnfolderBase]: 2729/4489 cut-off events. [2023-08-27 01:28:52,135 INFO L125 PetriNetUnfolderBase]: For 79584/79608 co-relation queries the response was YES. [2023-08-27 01:28:52,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38783 conditions, 4489 events. 2729/4489 cut-off events. For 79584/79608 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 26534 event pairs, 80 based on Foata normal form. 108/4565 useless extension candidates. Maximal degree in co-relation 38694. Up to 2097 conditions per place. [2023-08-27 01:28:52,173 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 262 selfloop transitions, 560 changer transitions 4/828 dead transitions. [2023-08-27 01:28:52,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 828 transitions, 15577 flow [2023-08-27 01:28:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-27 01:28:52,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-27 01:28:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 4269 transitions. [2023-08-27 01:28:52,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3206399278954484 [2023-08-27 01:28:52,190 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 4269 transitions. [2023-08-27 01:28:52,190 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 4269 transitions. [2023-08-27 01:28:52,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:28:52,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 4269 transitions. [2023-08-27 01:28:52,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 101.64285714285714) internal successors, (4269), 42 states have internal predecessors, (4269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:52,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 317.0) internal successors, (13631), 43 states have internal predecessors, (13631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:52,208 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 317.0) internal successors, (13631), 43 states have internal predecessors, (13631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:52,208 INFO L175 Difference]: Start difference. First operand has 289 places, 547 transitions, 10087 flow. Second operand 42 states and 4269 transitions. [2023-08-27 01:28:52,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 828 transitions, 15577 flow [2023-08-27 01:28:52,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 828 transitions, 15029 flow, removed 240 selfloop flow, removed 8 redundant places. [2023-08-27 01:28:52,648 INFO L231 Difference]: Finished difference. Result has 331 places, 720 transitions, 14529 flow [2023-08-27 01:28:52,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=9544, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=412, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=14529, PETRI_PLACES=331, PETRI_TRANSITIONS=720} [2023-08-27 01:28:52,649 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 298 predicate places. [2023-08-27 01:28:52,649 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 720 transitions, 14529 flow [2023-08-27 01:28:52,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 97.33333333333333) internal successors, (2336), 24 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:52,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:28:52,649 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:28:52,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-27 01:28:52,853 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,SelfDestructingSolverStorable39 [2023-08-27 01:28:52,854 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:28:52,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:28:52,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1951476745, now seen corresponding path program 2 times [2023-08-27 01:28:52,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:28:52,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682216240] [2023-08-27 01:28:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:28:52,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:28:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:28:53,733 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 01:28:53,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:28:53,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682216240] [2023-08-27 01:28:53,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682216240] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:28:53,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211073849] [2023-08-27 01:28:53,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:28:53,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:28:53,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:28:53,735 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 01:28:53,737 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 01:28:53,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:28:53,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:28:53,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 01:28:53,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:28:53,945 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 01:28:53,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:28:54,008 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 01:28:54,008 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 01:28:54,019 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 01:28:54,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211073849] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:28:54,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:28:54,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 4] total 18 [2023-08-27 01:28:54,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401430466] [2023-08-27 01:28:54,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:28:54,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 01:28:54,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:28:54,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 01:28:54,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2023-08-27 01:28:54,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:28:54,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 720 transitions, 14529 flow. Second operand has 20 states, 20 states have (on average 94.6) internal successors, (1892), 20 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:54,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:28:54,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:28:54,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:28:55,840 INFO L124 PetriNetUnfolderBase]: 2903/4761 cut-off events. [2023-08-27 01:28:55,840 INFO L125 PetriNetUnfolderBase]: For 98417/98423 co-relation queries the response was YES. [2023-08-27 01:28:55,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46054 conditions, 4761 events. 2903/4761 cut-off events. For 98417/98423 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 28236 event pairs, 193 based on Foata normal form. 62/4799 useless extension candidates. Maximal degree in co-relation 45957. Up to 1787 conditions per place. [2023-08-27 01:28:55,880 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 456 selfloop transitions, 464 changer transitions 0/922 dead transitions. [2023-08-27 01:28:55,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 922 transitions, 19872 flow [2023-08-27 01:28:55,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 01:28:55,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 01:28:55,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2000 transitions. [2023-08-27 01:28:55,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31545741324921134 [2023-08-27 01:28:55,882 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2000 transitions. [2023-08-27 01:28:55,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2000 transitions. [2023-08-27 01:28:55,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:28:55,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2000 transitions. [2023-08-27 01:28:55,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 100.0) internal successors, (2000), 20 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:55,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 317.0) internal successors, (6657), 21 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:55,887 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 317.0) internal successors, (6657), 21 states have internal predecessors, (6657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:55,887 INFO L175 Difference]: Start difference. First operand has 331 places, 720 transitions, 14529 flow. Second operand 20 states and 2000 transitions. [2023-08-27 01:28:55,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 922 transitions, 19872 flow [2023-08-27 01:28:56,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 922 transitions, 18409 flow, removed 543 selfloop flow, removed 30 redundant places. [2023-08-27 01:28:56,528 INFO L231 Difference]: Finished difference. Result has 321 places, 757 transitions, 15728 flow [2023-08-27 01:28:56,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=13212, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=428, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=15728, PETRI_PLACES=321, PETRI_TRANSITIONS=757} [2023-08-27 01:28:56,529 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 288 predicate places. [2023-08-27 01:28:56,529 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 757 transitions, 15728 flow [2023-08-27 01:28:56,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 94.6) internal successors, (1892), 20 states have internal predecessors, (1892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:56,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:28:56,529 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:28:56,534 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 01:28:56,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:28:56,734 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:28:56,734 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:28:56,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1373793463, now seen corresponding path program 2 times [2023-08-27 01:28:56,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:28:56,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955265667] [2023-08-27 01:28:56,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:28:56,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:28:56,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:28:57,137 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 01:28:57,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:28:57,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955265667] [2023-08-27 01:28:57,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955265667] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:28:57,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257643989] [2023-08-27 01:28:57,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:28:57,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:28:57,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:28:57,154 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 01:28:57,169 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 01:28:57,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:28:57,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:28:57,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 01:28:57,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:28:57,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:28:57,428 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 01:28:57,468 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 01:28:57,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:28:57,560 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:28:57,560 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 01:28:57,562 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 01:28:57,614 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 01:28:57,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257643989] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:28:57,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:28:57,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 23 [2023-08-27 01:28:57,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041776454] [2023-08-27 01:28:57,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:28:57,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 01:28:57,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:28:57,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 01:28:57,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=512, Unknown=12, NotChecked=0, Total=600 [2023-08-27 01:28:57,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 01:28:57,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 757 transitions, 15728 flow. Second operand has 25 states, 25 states have (on average 97.48) internal successors, (2437), 25 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:57,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:28:57,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 01:28:57,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:28:58,995 INFO L124 PetriNetUnfolderBase]: 2886/4748 cut-off events. [2023-08-27 01:28:58,995 INFO L125 PetriNetUnfolderBase]: For 94773/94779 co-relation queries the response was YES. [2023-08-27 01:28:59,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45975 conditions, 4748 events. 2886/4748 cut-off events. For 94773/94779 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 28100 event pairs, 306 based on Foata normal form. 44/4766 useless extension candidates. Maximal degree in co-relation 45878. Up to 3647 conditions per place. [2023-08-27 01:28:59,033 INFO L140 encePairwiseOnDemand]: 308/317 looper letters, 549 selfloop transitions, 247 changer transitions 0/798 dead transitions. [2023-08-27 01:28:59,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 798 transitions, 17564 flow [2023-08-27 01:28:59,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-27 01:28:59,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-27 01:28:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1540 transitions. [2023-08-27 01:28:59,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.323869610935857 [2023-08-27 01:28:59,035 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1540 transitions. [2023-08-27 01:28:59,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1540 transitions. [2023-08-27 01:28:59,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:28:59,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1540 transitions. [2023-08-27 01:28:59,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 102.66666666666667) internal successors, (1540), 15 states have internal predecessors, (1540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:59,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 317.0) internal successors, (5072), 16 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:59,039 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 317.0) internal successors, (5072), 16 states have internal predecessors, (5072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:59,039 INFO L175 Difference]: Start difference. First operand has 321 places, 757 transitions, 15728 flow. Second operand 15 states and 1540 transitions. [2023-08-27 01:28:59,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 798 transitions, 17564 flow [2023-08-27 01:28:59,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 798 transitions, 16750 flow, removed 217 selfloop flow, removed 10 redundant places. [2023-08-27 01:28:59,666 INFO L231 Difference]: Finished difference. Result has 327 places, 758 transitions, 15570 flow [2023-08-27 01:28:59,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=14772, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=242, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=15570, PETRI_PLACES=327, PETRI_TRANSITIONS=758} [2023-08-27 01:28:59,667 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 294 predicate places. [2023-08-27 01:28:59,667 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 758 transitions, 15570 flow [2023-08-27 01:28:59,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 97.48) internal successors, (2437), 25 states have internal predecessors, (2437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:28:59,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:28:59,667 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:28:59,671 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 01:28:59,871 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,SelfDestructingSolverStorable41 [2023-08-27 01:28:59,871 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:28:59,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:28:59,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1631455822, now seen corresponding path program 8 times [2023-08-27 01:28:59,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:28:59,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222023406] [2023-08-27 01:28:59,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:28:59,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:28:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:29:00,460 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 01:29:00,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:29:00,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222023406] [2023-08-27 01:29:00,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222023406] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:29:00,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023922632] [2023-08-27 01:29:00,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:29:00,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:29:00,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:29:00,461 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 01:29:00,464 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 01:29:00,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:29:00,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:29:00,652 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 01:29:00,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:29:00,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:29:00,816 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 01:29:00,918 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 01:29:00,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:29:01,080 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:29:01,080 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 75 treesize of output 77 [2023-08-27 01:29:01,109 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:29:01,109 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 18 treesize of output 5 [2023-08-27 01:29:01,295 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 01:29:01,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023922632] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:29:01,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:29:01,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 01:29:01,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461952715] [2023-08-27 01:29:01,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:29:01,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 01:29:01,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:29:01,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 01:29:01,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2023-08-27 01:29:01,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 01:29:01,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 758 transitions, 15570 flow. Second operand has 32 states, 32 states have (on average 97.21875) internal successors, (3111), 32 states have internal predecessors, (3111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:01,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:29:01,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 01:29:01,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:29:07,706 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~q_front~0 4))) (let ((.cse2 (+ .cse1 c_~q~0.offset)) (.cse3 (select |c_#memory_int| c_~q~0.base))) (and (<= 1 c_~q_front~0) (forall ((v_ArrVal_1356 (Array Int Int))) (< (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1356) c_~q~0.base))) (+ (select .cse0 (+ .cse1 c_~q~0.offset 4)) (select .cse0 .cse2))) 2147483648)) (= (select .cse3 .cse1) 1) (<= c_~q_front~0 2) (= c_~q~0.offset 0) (<= c_~s~0 1) (= (select .cse3 .cse2) 1) (= (select .cse3 (+ .cse1 c_~q~0.offset (- 4))) 1)))) is different from false [2023-08-27 01:29:09,531 INFO L124 PetriNetUnfolderBase]: 4310/7137 cut-off events. [2023-08-27 01:29:09,531 INFO L125 PetriNetUnfolderBase]: For 145886/145892 co-relation queries the response was YES. [2023-08-27 01:29:09,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68709 conditions, 7137 events. 4310/7137 cut-off events. For 145886/145892 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 45740 event pairs, 379 based on Foata normal form. 144/7231 useless extension candidates. Maximal degree in co-relation 68610. Up to 3741 conditions per place. [2023-08-27 01:29:09,588 INFO L140 encePairwiseOnDemand]: 305/317 looper letters, 845 selfloop transitions, 568 changer transitions 1/1416 dead transitions. [2023-08-27 01:29:09,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1416 transitions, 30153 flow [2023-08-27 01:29:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 01:29:09,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 01:29:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3692 transitions. [2023-08-27 01:29:09,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32351910269891343 [2023-08-27 01:29:09,592 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3692 transitions. [2023-08-27 01:29:09,592 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3692 transitions. [2023-08-27 01:29:09,592 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:29:09,592 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3692 transitions. [2023-08-27 01:29:09,595 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 102.55555555555556) internal successors, (3692), 36 states have internal predecessors, (3692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:09,599 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 317.0) internal successors, (11729), 37 states have internal predecessors, (11729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:09,600 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 317.0) internal successors, (11729), 37 states have internal predecessors, (11729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:09,600 INFO L175 Difference]: Start difference. First operand has 327 places, 758 transitions, 15570 flow. Second operand 36 states and 3692 transitions. [2023-08-27 01:29:09,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1416 transitions, 30153 flow [2023-08-27 01:29:10,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1416 transitions, 29521 flow, removed 68 selfloop flow, removed 10 redundant places. [2023-08-27 01:29:10,747 INFO L231 Difference]: Finished difference. Result has 369 places, 1107 transitions, 24717 flow [2023-08-27 01:29:10,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=14901, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=24717, PETRI_PLACES=369, PETRI_TRANSITIONS=1107} [2023-08-27 01:29:10,748 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 336 predicate places. [2023-08-27 01:29:10,748 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 1107 transitions, 24717 flow [2023-08-27 01:29:10,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 97.21875) internal successors, (3111), 32 states have internal predecessors, (3111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:10,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:29:10,749 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:29:10,754 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 01:29:10,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:29:10,953 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:29:10,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:29:10,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1814742565, now seen corresponding path program 3 times [2023-08-27 01:29:10,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:29:10,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543585935] [2023-08-27 01:29:10,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:29:10,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:29:10,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:29:11,444 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 01:29:11,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:29:11,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543585935] [2023-08-27 01:29:11,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543585935] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:29:11,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468875108] [2023-08-27 01:29:11,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:29:11,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:29:11,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:29:11,446 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 01:29:11,448 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 01:29:11,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:29:11,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:29:11,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 01:29:11,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:29:11,658 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 01:29:11,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:29:11,680 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:29:11,681 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 01:29:11,706 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 01:29:11,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468875108] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:29:11,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:29:11,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 15 [2023-08-27 01:29:11,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940274912] [2023-08-27 01:29:11,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:29:11,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 01:29:11,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:29:11,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 01:29:11,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2023-08-27 01:29:11,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 01:29:11,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 1107 transitions, 24717 flow. Second operand has 17 states, 17 states have (on average 97.52941176470588) internal successors, (1658), 17 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:11,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:29:11,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 01:29:11,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:29:14,251 INFO L124 PetriNetUnfolderBase]: 4094/6773 cut-off events. [2023-08-27 01:29:14,251 INFO L125 PetriNetUnfolderBase]: For 160865/160871 co-relation queries the response was YES. [2023-08-27 01:29:14,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71248 conditions, 6773 events. 4094/6773 cut-off events. For 160865/160871 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 42987 event pairs, 274 based on Foata normal form. 116/6851 useless extension candidates. Maximal degree in co-relation 71133. Up to 5130 conditions per place. [2023-08-27 01:29:14,314 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 657 selfloop transitions, 446 changer transitions 0/1105 dead transitions. [2023-08-27 01:29:14,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 1105 transitions, 26286 flow [2023-08-27 01:29:14,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 01:29:14,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 01:29:14,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1840 transitions. [2023-08-27 01:29:14,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32246757798808273 [2023-08-27 01:29:14,317 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1840 transitions. [2023-08-27 01:29:14,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1840 transitions. [2023-08-27 01:29:14,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:29:14,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1840 transitions. [2023-08-27 01:29:14,322 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 102.22222222222223) internal successors, (1840), 18 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:14,324 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 317.0) internal successors, (6023), 19 states have internal predecessors, (6023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:14,325 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 317.0) internal successors, (6023), 19 states have internal predecessors, (6023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:14,325 INFO L175 Difference]: Start difference. First operand has 369 places, 1107 transitions, 24717 flow. Second operand 18 states and 1840 transitions. [2023-08-27 01:29:14,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 1105 transitions, 26286 flow [2023-08-27 01:29:16,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1105 transitions, 25364 flow, removed 425 selfloop flow, removed 9 redundant places. [2023-08-27 01:29:16,039 INFO L231 Difference]: Finished difference. Result has 377 places, 1055 transitions, 23649 flow [2023-08-27 01:29:16,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=22119, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1023, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=414, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=23649, PETRI_PLACES=377, PETRI_TRANSITIONS=1055} [2023-08-27 01:29:16,040 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 344 predicate places. [2023-08-27 01:29:16,040 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 1055 transitions, 23649 flow [2023-08-27 01:29:16,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 97.52941176470588) internal successors, (1658), 17 states have internal predecessors, (1658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:16,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:29:16,041 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:29:16,046 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 01:29:16,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:29:16,245 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:29:16,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:29:16,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1373793501, now seen corresponding path program 4 times [2023-08-27 01:29:16,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:29:16,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689697432] [2023-08-27 01:29:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:29:16,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:29:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:29:16,631 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 01:29:16,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:29:16,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689697432] [2023-08-27 01:29:16,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689697432] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:29:16,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10141028] [2023-08-27 01:29:16,631 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:29:16,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:29:16,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:29:16,632 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 01:29:16,634 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 01:29:16,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:29:16,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:29:16,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 01:29:16,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:29:16,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:29:16,885 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 01:29:16,957 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 01:29:16,957 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:29:17,073 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (* c_~q_front~0 4))) (let ((.cse3 (+ .cse6 c_~q~0.offset 4)) (.cse2 (+ .cse6 c_~q~0.offset))) (and (forall ((v_ArrVal_1434 (Array Int Int))) (let ((.cse1 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1434) c_~q~0.base))) (let ((.cse0 (select .cse1 .cse3))) (or (< 0 (+ .cse0 2147483650)) (< 0 (+ .cse0 2147483649 (select .cse1 .cse2))))))) (forall ((v_ArrVal_1434 (Array Int Int))) (let ((.cse5 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1434) c_~q~0.base))) (let ((.cse4 (select .cse5 .cse2))) (or (< 0 (+ .cse4 1)) (< 0 (+ (select .cse5 .cse3) 2147483649 .cse4))))))))) is different from false [2023-08-27 01:29:17,164 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:29:17,165 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 199 treesize of output 167 [2023-08-27 01:29:17,176 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:29:17,176 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 103 [2023-08-27 01:29:17,185 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:29:17,186 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 103 treesize of output 83 [2023-08-27 01:29:17,310 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 01:29:17,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10141028] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:29:17,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:29:17,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 25 [2023-08-27 01:29:17,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546338960] [2023-08-27 01:29:17,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:29:17,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 01:29:17,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:29:17,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 01:29:17,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=573, Unknown=1, NotChecked=48, Total=702 [2023-08-27 01:29:17,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 01:29:17,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 1055 transitions, 23649 flow. Second operand has 27 states, 27 states have (on average 97.37037037037037) internal successors, (2629), 27 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:17,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:29:17,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 01:29:17,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:29:21,555 INFO L124 PetriNetUnfolderBase]: 4287/7162 cut-off events. [2023-08-27 01:29:21,555 INFO L125 PetriNetUnfolderBase]: For 165284/165290 co-relation queries the response was YES. [2023-08-27 01:29:21,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73793 conditions, 7162 events. 4287/7162 cut-off events. For 165284/165290 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 46758 event pairs, 214 based on Foata normal form. 60/7182 useless extension candidates. Maximal degree in co-relation 73678. Up to 3547 conditions per place. [2023-08-27 01:29:21,630 INFO L140 encePairwiseOnDemand]: 303/317 looper letters, 525 selfloop transitions, 751 changer transitions 0/1278 dead transitions. [2023-08-27 01:29:21,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1278 transitions, 29659 flow [2023-08-27 01:29:21,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 01:29:21,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 01:29:21,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3457 transitions. [2023-08-27 01:29:21,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32074596400074223 [2023-08-27 01:29:21,634 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3457 transitions. [2023-08-27 01:29:21,634 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3457 transitions. [2023-08-27 01:29:21,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:29:21,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3457 transitions. [2023-08-27 01:29:21,637 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 101.67647058823529) internal successors, (3457), 34 states have internal predecessors, (3457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:21,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 317.0) internal successors, (11095), 35 states have internal predecessors, (11095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:21,642 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 317.0) internal successors, (11095), 35 states have internal predecessors, (11095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:21,642 INFO L175 Difference]: Start difference. First operand has 377 places, 1055 transitions, 23649 flow. Second operand 34 states and 3457 transitions. [2023-08-27 01:29:21,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1278 transitions, 29659 flow [2023-08-27 01:29:23,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 1278 transitions, 29310 flow, removed 21 selfloop flow, removed 10 redundant places. [2023-08-27 01:29:23,311 INFO L231 Difference]: Finished difference. Result has 406 places, 1157 transitions, 27615 flow [2023-08-27 01:29:23,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=22998, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1042, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=638, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=27615, PETRI_PLACES=406, PETRI_TRANSITIONS=1157} [2023-08-27 01:29:23,312 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 373 predicate places. [2023-08-27 01:29:23,312 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 1157 transitions, 27615 flow [2023-08-27 01:29:23,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 97.37037037037037) internal successors, (2629), 27 states have internal predecessors, (2629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:23,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:29:23,313 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:29:23,321 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 01:29:23,517 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,SelfDestructingSolverStorable44 [2023-08-27 01:29:23,517 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:29:23,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:29:23,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1127698273, now seen corresponding path program 6 times [2023-08-27 01:29:23,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:29:23,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171840143] [2023-08-27 01:29:23,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:29:23,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:29:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:29:23,824 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 01:29:23,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:29:23,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171840143] [2023-08-27 01:29:23,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171840143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:29:23,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522377470] [2023-08-27 01:29:23,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:29:23,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:29:23,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:29:23,825 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 01:29:23,827 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 01:29:23,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 01:29:23,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:29:23,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 01:29:23,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:29:24,040 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:29:24,067 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:29:24,102 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:29:24,221 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 01:29:24,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:29:24,540 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:29:24,540 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 01:29:24,548 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 01:29:24,548 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 152 treesize of output 140 [2023-08-27 01:29:24,554 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-27 01:29:24,554 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 135 treesize of output 109 [2023-08-27 01:29:24,583 INFO L322 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2023-08-27 01:29:24,583 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 84 treesize of output 71 [2023-08-27 01:29:24,776 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 01:29:24,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522377470] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:29:24,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:29:24,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2023-08-27 01:29:24,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575428013] [2023-08-27 01:29:24,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:29:24,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-27 01:29:24,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:29:24,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-27 01:29:24,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=933, Unknown=3, NotChecked=0, Total=1122 [2023-08-27 01:29:24,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:29:24,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 1157 transitions, 27615 flow. Second operand has 34 states, 34 states have (on average 94.32352941176471) internal successors, (3207), 34 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:24,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:29:24,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:29:24,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:29:29,791 INFO L124 PetriNetUnfolderBase]: 4102/7106 cut-off events. [2023-08-27 01:29:29,792 INFO L125 PetriNetUnfolderBase]: For 210759/210765 co-relation queries the response was YES. [2023-08-27 01:29:29,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80841 conditions, 7106 events. 4102/7106 cut-off events. For 210759/210765 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 48542 event pairs, 692 based on Foata normal form. 200/7248 useless extension candidates. Maximal degree in co-relation 80721. Up to 3959 conditions per place. [2023-08-27 01:29:30,029 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 1053 selfloop transitions, 358 changer transitions 3/1416 dead transitions. [2023-08-27 01:29:30,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 1416 transitions, 34744 flow [2023-08-27 01:29:30,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-27 01:29:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-27 01:29:30,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4274 transitions. [2023-08-27 01:29:30,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31354999633189057 [2023-08-27 01:29:30,033 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4274 transitions. [2023-08-27 01:29:30,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4274 transitions. [2023-08-27 01:29:30,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:29:30,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4274 transitions. [2023-08-27 01:29:30,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 99.3953488372093) internal successors, (4274), 43 states have internal predecessors, (4274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:30,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 317.0) internal successors, (13948), 44 states have internal predecessors, (13948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:30,042 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 317.0) internal successors, (13948), 44 states have internal predecessors, (13948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:30,042 INFO L175 Difference]: Start difference. First operand has 406 places, 1157 transitions, 27615 flow. Second operand 43 states and 4274 transitions. [2023-08-27 01:29:30,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 1416 transitions, 34744 flow [2023-08-27 01:29:31,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 1416 transitions, 33561 flow, removed 453 selfloop flow, removed 13 redundant places. [2023-08-27 01:29:32,017 INFO L231 Difference]: Finished difference. Result has 449 places, 1182 transitions, 28847 flow [2023-08-27 01:29:32,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=25254, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1087, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=270, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=751, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=28847, PETRI_PLACES=449, PETRI_TRANSITIONS=1182} [2023-08-27 01:29:32,018 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 416 predicate places. [2023-08-27 01:29:32,018 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 1182 transitions, 28847 flow [2023-08-27 01:29:32,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 94.32352941176471) internal successors, (3207), 34 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:32,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:29:32,018 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:29:32,023 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 01:29:32,223 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,SelfDestructingSolverStorable45 [2023-08-27 01:29:32,223 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:29:32,223 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:29:32,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1209832643, now seen corresponding path program 9 times [2023-08-27 01:29:32,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:29:32,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508019366] [2023-08-27 01:29:32,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:29:32,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:29:32,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:29:32,833 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 01:29:32,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:29:32,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508019366] [2023-08-27 01:29:32,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508019366] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:29:32,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767815708] [2023-08-27 01:29:32,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:29:32,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:29:32,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:29:32,859 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 01:29:32,861 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 01:29:32,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 01:29:32,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:29:32,991 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-27 01:29:32,993 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:29:33,031 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 01:29:33,067 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 01:29:33,108 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-27 01:29:33,152 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:29:33,183 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:29:33,472 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 01:29:33,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:29:34,219 INFO L322 Elim1Store]: treesize reduction 35, result has 58.8 percent of original size [2023-08-27 01:29:34,220 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 269 treesize of output 156 [2023-08-27 01:29:34,404 INFO L322 Elim1Store]: treesize reduction 21, result has 89.3 percent of original size [2023-08-27 01:29:34,404 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 401 treesize of output 507 [2023-08-27 01:29:34,489 INFO L322 Elim1Store]: treesize reduction 24, result has 71.8 percent of original size [2023-08-27 01:29:34,489 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 312 treesize of output 292 [2023-08-27 01:29:34,577 INFO L322 Elim1Store]: treesize reduction 24, result has 71.8 percent of original size [2023-08-27 01:29:34,578 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 205 treesize of output 225 [2023-08-27 01:29:59,794 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 01:29:59,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767815708] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:29:59,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:29:59,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2023-08-27 01:29:59,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169030642] [2023-08-27 01:29:59,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:29:59,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-27 01:29:59,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:29:59,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-27 01:29:59,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1062, Unknown=8, NotChecked=0, Total=1332 [2023-08-27 01:29:59,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:29:59,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 1182 transitions, 28847 flow. Second operand has 37 states, 37 states have (on average 94.21621621621621) internal successors, (3486), 37 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:29:59,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:29:59,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:29:59,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:30:05,715 INFO L124 PetriNetUnfolderBase]: 4538/7950 cut-off events. [2023-08-27 01:30:05,715 INFO L125 PetriNetUnfolderBase]: For 269868/269874 co-relation queries the response was YES. [2023-08-27 01:30:05,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93972 conditions, 7950 events. 4538/7950 cut-off events. For 269868/269874 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 56203 event pairs, 491 based on Foata normal form. 142/8049 useless extension candidates. Maximal degree in co-relation 93837. Up to 5356 conditions per place. [2023-08-27 01:30:05,816 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 980 selfloop transitions, 573 changer transitions 12/1567 dead transitions. [2023-08-27 01:30:05,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 1567 transitions, 40174 flow [2023-08-27 01:30:05,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-27 01:30:05,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-27 01:30:05,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 5907 transitions. [2023-08-27 01:30:05,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3105678233438486 [2023-08-27 01:30:05,821 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 5907 transitions. [2023-08-27 01:30:05,821 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 5907 transitions. [2023-08-27 01:30:05,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:30:05,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 5907 transitions. [2023-08-27 01:30:05,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 98.45) internal successors, (5907), 60 states have internal predecessors, (5907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:05,835 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 317.0) internal successors, (19337), 61 states have internal predecessors, (19337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:05,836 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 317.0) internal successors, (19337), 61 states have internal predecessors, (19337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:05,837 INFO L175 Difference]: Start difference. First operand has 449 places, 1182 transitions, 28847 flow. Second operand 60 states and 5907 transitions. [2023-08-27 01:30:05,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 1567 transitions, 40174 flow [2023-08-27 01:30:08,646 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 1567 transitions, 37795 flow, removed 1137 selfloop flow, removed 10 redundant places. [2023-08-27 01:30:08,671 INFO L231 Difference]: Finished difference. Result has 519 places, 1371 transitions, 34402 flow [2023-08-27 01:30:08,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=27229, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=407, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=34402, PETRI_PLACES=519, PETRI_TRANSITIONS=1371} [2023-08-27 01:30:08,671 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 486 predicate places. [2023-08-27 01:30:08,672 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 1371 transitions, 34402 flow [2023-08-27 01:30:08,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 94.21621621621621) internal successors, (3486), 37 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:08,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:30:08,672 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:30:08,679 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 01:30:08,876 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,SelfDestructingSolverStorable46 [2023-08-27 01:30:08,877 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:30:08,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:30:08,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1770873833, now seen corresponding path program 7 times [2023-08-27 01:30:08,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:30:08,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295650987] [2023-08-27 01:30:08,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:30:08,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:30:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:30:09,612 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 01:30:09,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:30:09,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295650987] [2023-08-27 01:30:09,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295650987] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:30:09,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582459756] [2023-08-27 01:30:09,612 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:30:09,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:30:09,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:30:09,613 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 01:30:09,615 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 01:30:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:30:09,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 01:30:09,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:30:09,988 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 01:30:09,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:30:10,052 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 01:30:10,053 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 01:30:10,273 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 01:30:10,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582459756] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:30:10,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:30:10,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 32 [2023-08-27 01:30:10,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958928140] [2023-08-27 01:30:10,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:30:10,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-27 01:30:10,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:30:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-27 01:30:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2023-08-27 01:30:10,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:30:10,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 1371 transitions, 34402 flow. Second operand has 34 states, 34 states have (on average 94.32352941176471) internal successors, (3207), 34 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:10,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:30:10,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:30:10,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:30:18,297 INFO L124 PetriNetUnfolderBase]: 5439/9613 cut-off events. [2023-08-27 01:30:18,297 INFO L125 PetriNetUnfolderBase]: For 415038/415044 co-relation queries the response was YES. [2023-08-27 01:30:18,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120758 conditions, 9613 events. 5439/9613 cut-off events. For 415038/415044 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 70586 event pairs, 216 based on Foata normal form. 452/9970 useless extension candidates. Maximal degree in co-relation 120602. Up to 3853 conditions per place. [2023-08-27 01:30:18,407 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 455 selfloop transitions, 1431 changer transitions 16/1904 dead transitions. [2023-08-27 01:30:18,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 1904 transitions, 51110 flow [2023-08-27 01:30:18,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-08-27 01:30:18,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-08-27 01:30:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 5533 transitions. [2023-08-27 01:30:18,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3173501577287066 [2023-08-27 01:30:18,411 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 5533 transitions. [2023-08-27 01:30:18,411 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 5533 transitions. [2023-08-27 01:30:18,411 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:30:18,411 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 5533 transitions. [2023-08-27 01:30:18,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 100.6) internal successors, (5533), 55 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:18,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 317.0) internal successors, (17752), 56 states have internal predecessors, (17752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:18,422 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 317.0) internal successors, (17752), 56 states have internal predecessors, (17752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:18,422 INFO L175 Difference]: Start difference. First operand has 519 places, 1371 transitions, 34402 flow. Second operand 55 states and 5533 transitions. [2023-08-27 01:30:18,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 1904 transitions, 51110 flow [2023-08-27 01:30:22,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 1904 transitions, 48363 flow, removed 1265 selfloop flow, removed 16 redundant places. [2023-08-27 01:30:22,601 INFO L231 Difference]: Finished difference. Result has 570 places, 1686 transitions, 46443 flow [2023-08-27 01:30:22,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=31789, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=46443, PETRI_PLACES=570, PETRI_TRANSITIONS=1686} [2023-08-27 01:30:22,602 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 537 predicate places. [2023-08-27 01:30:22,602 INFO L495 AbstractCegarLoop]: Abstraction has has 570 places, 1686 transitions, 46443 flow [2023-08-27 01:30:22,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 94.32352941176471) internal successors, (3207), 34 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:22,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:30:22,602 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:30:22,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-08-27 01:30:22,807 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,SelfDestructingSolverStorable47 [2023-08-27 01:30:22,807 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:30:22,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:30:22,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1128412830, now seen corresponding path program 3 times [2023-08-27 01:30:22,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:30:22,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124007920] [2023-08-27 01:30:22,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:30:22,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:30:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:30:23,069 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 01:30:23,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:30:23,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124007920] [2023-08-27 01:30:23,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124007920] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:30:23,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451014794] [2023-08-27 01:30:23,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:30:23,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:30:23,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:30:23,081 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 01:30:23,130 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 01:30:23,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:30:23,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:30:23,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-27 01:30:23,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:30:23,355 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 01:30:23,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:30:23,401 INFO L322 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-08-27 01:30:23,404 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 01:30:23,440 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 01:30:23,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451014794] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:30:23,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:30:23,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 19 [2023-08-27 01:30:23,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204165118] [2023-08-27 01:30:23,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:30:23,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 01:30:23,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:30:23,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 01:30:23,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2023-08-27 01:30:23,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 01:30:23,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 570 places, 1686 transitions, 46443 flow. Second operand has 21 states, 21 states have (on average 101.52380952380952) internal successors, (2132), 21 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:23,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:30:23,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 01:30:23,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:30:29,321 INFO L124 PetriNetUnfolderBase]: 5448/9770 cut-off events. [2023-08-27 01:30:29,321 INFO L125 PetriNetUnfolderBase]: For 390492/390498 co-relation queries the response was YES. [2023-08-27 01:30:29,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125756 conditions, 9770 events. 5448/9770 cut-off events. For 390492/390498 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 72944 event pairs, 314 based on Foata normal form. 120/9823 useless extension candidates. Maximal degree in co-relation 125588. Up to 4629 conditions per place. [2023-08-27 01:30:29,456 INFO L140 encePairwiseOnDemand]: 307/317 looper letters, 768 selfloop transitions, 1079 changer transitions 2/1851 dead transitions. [2023-08-27 01:30:29,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 1851 transitions, 53489 flow [2023-08-27 01:30:29,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 01:30:29,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 01:30:29,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2580 transitions. [2023-08-27 01:30:29,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3391167192429022 [2023-08-27 01:30:29,459 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2580 transitions. [2023-08-27 01:30:29,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2580 transitions. [2023-08-27 01:30:29,459 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:30:29,459 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2580 transitions. [2023-08-27 01:30:29,461 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 107.5) internal successors, (2580), 24 states have internal predecessors, (2580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:29,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 317.0) internal successors, (7925), 25 states have internal predecessors, (7925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:29,464 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 317.0) internal successors, (7925), 25 states have internal predecessors, (7925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:29,464 INFO L175 Difference]: Start difference. First operand has 570 places, 1686 transitions, 46443 flow. Second operand 24 states and 2580 transitions. [2023-08-27 01:30:29,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 1851 transitions, 53489 flow [2023-08-27 01:30:35,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 1851 transitions, 45696 flow, removed 3598 selfloop flow, removed 24 redundant places. [2023-08-27 01:30:35,946 INFO L231 Difference]: Finished difference. Result has 571 places, 1758 transitions, 43999 flow [2023-08-27 01:30:35,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=39008, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=995, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=43999, PETRI_PLACES=571, PETRI_TRANSITIONS=1758} [2023-08-27 01:30:35,947 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 538 predicate places. [2023-08-27 01:30:35,947 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 1758 transitions, 43999 flow [2023-08-27 01:30:35,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.52380952380952) internal successors, (2132), 21 states have internal predecessors, (2132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:35,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:30:35,948 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:30:35,955 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 01:30:36,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:30:36,153 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:30:36,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:30:36,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1209386243, now seen corresponding path program 10 times [2023-08-27 01:30:36,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:30:36,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501221670] [2023-08-27 01:30:36,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:30:36,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:30:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:30:36,951 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 01:30:36,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:30:36,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501221670] [2023-08-27 01:30:36,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501221670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:30:36,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246223601] [2023-08-27 01:30:36,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:30:36,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:30:36,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:30:36,953 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 01:30:36,978 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 01:30:37,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:30:37,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:30:37,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-27 01:30:37,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:30:37,169 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 01:30:37,195 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:30:37,227 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:30:37,252 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:30:37,473 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 01:30:37,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:30:37,976 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:30:37,976 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 227 treesize of output 132 [2023-08-27 01:30:38,021 INFO L322 Elim1Store]: treesize reduction 21, result has 75.3 percent of original size [2023-08-27 01:30:38,022 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 364 treesize of output 375 [2023-08-27 01:30:38,065 INFO L322 Elim1Store]: treesize reduction 24, result has 71.8 percent of original size [2023-08-27 01:30:38,065 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 312 treesize of output 292 [2023-08-27 01:30:38,108 INFO L322 Elim1Store]: treesize reduction 24, result has 71.8 percent of original size [2023-08-27 01:30:38,108 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 205 treesize of output 225 [2023-08-27 01:30:40,301 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 01:30:40,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246223601] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:30:40,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:30:40,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-27 01:30:40,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923952909] [2023-08-27 01:30:40,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:30:40,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-27 01:30:40,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:30:40,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-27 01:30:40,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1190, Unknown=2, NotChecked=0, Total=1406 [2023-08-27 01:30:40,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:30:40,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 1758 transitions, 43999 flow. Second operand has 38 states, 38 states have (on average 94.1842105263158) internal successors, (3579), 38 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 01:30:40,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:30:40,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:30:40,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:30:44,778 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 01:30:47,224 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:49,546 WARN L539 Checker$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 01:30:51,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:30:53,722 WARN L539 Checker$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 01:30:58,237 INFO L124 PetriNetUnfolderBase]: 5518/9889 cut-off events. [2023-08-27 01:30:58,237 INFO L125 PetriNetUnfolderBase]: For 283583/283589 co-relation queries the response was YES. [2023-08-27 01:30:58,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113304 conditions, 9889 events. 5518/9889 cut-off events. For 283583/283589 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 73966 event pairs, 755 based on Foata normal form. 10/9639 useless extension candidates. Maximal degree in co-relation 113146. Up to 7707 conditions per place. [2023-08-27 01:30:58,372 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 1417 selfloop transitions, 539 changer transitions 2/1960 dead transitions. [2023-08-27 01:30:58,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 1960 transitions, 50689 flow [2023-08-27 01:30:58,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-08-27 01:30:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2023-08-27 01:30:58,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4728 transitions. [2023-08-27 01:30:58,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3107255520504732 [2023-08-27 01:30:58,376 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4728 transitions. [2023-08-27 01:30:58,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4728 transitions. [2023-08-27 01:30:58,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:30:58,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4728 transitions. [2023-08-27 01:30:58,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 98.5) internal successors, (4728), 48 states have internal predecessors, (4728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:58,386 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 317.0) internal successors, (15533), 49 states have internal predecessors, (15533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:58,387 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 317.0) internal successors, (15533), 49 states have internal predecessors, (15533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:30:58,387 INFO L175 Difference]: Start difference. First operand has 571 places, 1758 transitions, 43999 flow. Second operand 48 states and 4728 transitions. [2023-08-27 01:30:58,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 1960 transitions, 50689 flow [2023-08-27 01:31:02,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 1960 transitions, 48330 flow, removed 321 selfloop flow, removed 11 redundant places. [2023-08-27 01:31:02,571 INFO L231 Difference]: Finished difference. Result has 617 places, 1816 transitions, 44469 flow [2023-08-27 01:31:02,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=41665, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=481, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=44469, PETRI_PLACES=617, PETRI_TRANSITIONS=1816} [2023-08-27 01:31:02,573 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 584 predicate places. [2023-08-27 01:31:02,573 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 1816 transitions, 44469 flow [2023-08-27 01:31:02,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 94.1842105263158) internal successors, (3579), 38 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 01:31:02,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:31:02,574 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:31:02,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-27 01:31:02,776 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,SelfDestructingSolverStorable49 [2023-08-27 01:31:02,777 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:31:02,777 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:31:02,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1771320195, now seen corresponding path program 11 times [2023-08-27 01:31:02,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:31:02,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420024089] [2023-08-27 01:31:02,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:31:02,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:31:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:31:03,546 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 01:31:03,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:31:03,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420024089] [2023-08-27 01:31:03,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420024089] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:31:03,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357707808] [2023-08-27 01:31:03,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:31:03,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:31:03,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:31:03,548 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 01:31:03,551 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 01:31:03,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 01:31:03,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:31:03,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjunts are in the unsatisfiable core [2023-08-27 01:31:03,696 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:31:03,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:31:03,795 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 01:31:03,947 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 01:31:03,947 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:31:04,125 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1681 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1681) c_~q~0.base)) (.cse2 (* 4 c_~q_back~0))) (or (< (let ((.cse1 (* c_~q_front~0 4))) (+ (select .cse0 (+ .cse1 c_~q~0.offset)) (select .cse0 (+ .cse1 c_~q~0.offset 8)) (select .cse0 (+ .cse1 c_~q~0.offset 4)))) 2147483648) (not (= (select .cse0 (+ c_~q~0.offset .cse2)) 1)) (not (= (select .cse0 (+ c_~q~0.offset .cse2 4)) 1))))) is different from false [2023-08-27 01:31:04,167 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:31:04,168 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 180 [2023-08-27 01:31:04,194 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:31:04,194 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 103 [2023-08-27 01:31:04,774 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 01:31:04,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357707808] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:31:04,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:31:04,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 32 [2023-08-27 01:31:04,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114167622] [2023-08-27 01:31:04,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:31:04,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-08-27 01:31:04,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:31:04,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-08-27 01:31:04,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=952, Unknown=1, NotChecked=62, Total=1122 [2023-08-27 01:31:04,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 01:31:04,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 1816 transitions, 44469 flow. Second operand has 34 states, 34 states have (on average 97.26470588235294) internal successors, (3307), 34 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:04,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:31:04,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 01:31:04,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:31:16,783 INFO L124 PetriNetUnfolderBase]: 6201/11065 cut-off events. [2023-08-27 01:31:16,784 INFO L125 PetriNetUnfolderBase]: For 360029/360035 co-relation queries the response was YES. [2023-08-27 01:31:16,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128801 conditions, 11065 events. 6201/11065 cut-off events. For 360029/360035 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 84422 event pairs, 450 based on Foata normal form. 338/11125 useless extension candidates. Maximal degree in co-relation 128635. Up to 3728 conditions per place. [2023-08-27 01:31:16,915 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 780 selfloop transitions, 1635 changer transitions 6/2423 dead transitions. [2023-08-27 01:31:16,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 712 places, 2423 transitions, 60943 flow [2023-08-27 01:31:16,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-08-27 01:31:16,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2023-08-27 01:31:16,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 10287 transitions. [2023-08-27 01:31:16,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32129806040540965 [2023-08-27 01:31:16,921 INFO L72 ComplementDD]: Start complementDD. Operand 101 states and 10287 transitions. [2023-08-27 01:31:16,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 101 states and 10287 transitions. [2023-08-27 01:31:16,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:31:16,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 101 states and 10287 transitions. [2023-08-27 01:31:16,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 102 states, 101 states have (on average 101.85148514851485) internal successors, (10287), 101 states have internal predecessors, (10287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:16,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 102 states, 102 states have (on average 317.0) internal successors, (32334), 102 states have internal predecessors, (32334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:16,942 INFO L81 ComplementDD]: Finished complementDD. Result has 102 states, 102 states have (on average 317.0) internal successors, (32334), 102 states have internal predecessors, (32334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:16,942 INFO L175 Difference]: Start difference. First operand has 617 places, 1816 transitions, 44469 flow. Second operand 101 states and 10287 transitions. [2023-08-27 01:31:16,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 712 places, 2423 transitions, 60943 flow [2023-08-27 01:31:20,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 692 places, 2423 transitions, 60424 flow, removed 105 selfloop flow, removed 20 redundant places. [2023-08-27 01:31:20,518 INFO L231 Difference]: Finished difference. Result has 717 places, 2140 transitions, 57539 flow [2023-08-27 01:31:20,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=41493, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1266, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=101, PETRI_FLOW=57539, PETRI_PLACES=717, PETRI_TRANSITIONS=2140} [2023-08-27 01:31:20,519 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 684 predicate places. [2023-08-27 01:31:20,519 INFO L495 AbstractCegarLoop]: Abstraction has has 717 places, 2140 transitions, 57539 flow [2023-08-27 01:31:20,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 97.26470588235294) internal successors, (3307), 34 states have internal predecessors, (3307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:31:20,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:31:20,519 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:31:20,526 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 01:31:20,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:31:20,724 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:31:20,725 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:31:20,725 INFO L85 PathProgramCache]: Analyzing trace with hash 224526211, now seen corresponding path program 12 times [2023-08-27 01:31:20,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:31:20,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189470146] [2023-08-27 01:31:20,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:31:20,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:31:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:31:21,433 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 01:31:21,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:31:21,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189470146] [2023-08-27 01:31:21,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189470146] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:31:21,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62597313] [2023-08-27 01:31:21,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:31:21,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:31:21,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:31:21,435 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 01:31:21,437 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 01:31:21,576 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 01:31:21,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:31:21,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-27 01:31:21,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:31:21,657 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:31:21,686 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:31:21,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:31:21,752 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 01:31:22,015 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 01:31:22,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:31:22,729 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:31:22,729 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 173 treesize of output 113 [2023-08-27 01:31:22,807 INFO L322 Elim1Store]: treesize reduction 42, result has 65.3 percent of original size [2023-08-27 01:31:22,808 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 312 treesize of output 341 [2023-08-27 01:31:22,818 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:31:22,820 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:31:22,822 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:31:22,822 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:31:22,848 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:31:22,848 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 239 treesize of output 231 [2023-08-27 01:31:22,934 INFO L322 Elim1Store]: treesize reduction 42, result has 65.3 percent of original size [2023-08-27 01:31:22,934 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 174 treesize of output 215 [2023-08-27 01:31:32,593 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 01:31:32,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62597313] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:31:32,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:31:32,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 36 [2023-08-27 01:31:32,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73307548] [2023-08-27 01:31:32,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:31:32,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-27 01:31:32,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:31:32,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-27 01:31:32,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1185, Unknown=3, NotChecked=0, Total=1406 [2023-08-27 01:31:32,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:31:32,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 717 places, 2140 transitions, 57539 flow. Second operand has 38 states, 38 states have (on average 94.1842105263158) internal successors, (3579), 38 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 01:31:32,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:31:32,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:31:32,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:31:43,234 WARN L234 SmtUtils]: Spent 10.17s on a formula simplification that was a NOOP. DAG size: 116 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:31:48,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:31:51,964 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:32:11,427 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:32:24,183 WARN L234 SmtUtils]: Spent 7.64s on a formula simplification that was a NOOP. DAG size: 131 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 01:32:32,234 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:32:36,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:32:49,063 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:32:51,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:32:55,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:33:02,753 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:33:04,105 INFO L124 PetriNetUnfolderBase]: 6295/11336 cut-off events. [2023-08-27 01:33:04,106 INFO L125 PetriNetUnfolderBase]: For 388910/388916 co-relation queries the response was YES. [2023-08-27 01:33:04,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139581 conditions, 11336 events. 6295/11336 cut-off events. For 388910/388916 co-relation queries the response was YES. Maximal size of possible extension queue 638. Compared 87356 event pairs, 1233 based on Foata normal form. 194/11302 useless extension candidates. Maximal degree in co-relation 139396. Up to 6850 conditions per place. [2023-08-27 01:33:04,450 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 1649 selfloop transitions, 743 changer transitions 5/2399 dead transitions. [2023-08-27 01:33:04,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 790 places, 2399 transitions, 65392 flow [2023-08-27 01:33:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-27 01:33:04,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-27 01:33:04,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 7489 transitions. [2023-08-27 01:33:04,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3108500747135979 [2023-08-27 01:33:04,474 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 7489 transitions. [2023-08-27 01:33:04,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 7489 transitions. [2023-08-27 01:33:04,475 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:33:04,475 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 7489 transitions. [2023-08-27 01:33:04,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 98.53947368421052) internal successors, (7489), 76 states have internal predecessors, (7489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:04,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 317.0) internal successors, (24409), 77 states have internal predecessors, (24409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:04,489 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 317.0) internal successors, (24409), 77 states have internal predecessors, (24409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:04,489 INFO L175 Difference]: Start difference. First operand has 717 places, 2140 transitions, 57539 flow. Second operand 76 states and 7489 transitions. [2023-08-27 01:33:04,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 790 places, 2399 transitions, 65392 flow [2023-08-27 01:33:09,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 762 places, 2399 transitions, 61209 flow, removed 1744 selfloop flow, removed 28 redundant places. [2023-08-27 01:33:09,690 INFO L231 Difference]: Finished difference. Result has 776 places, 2204 transitions, 57019 flow [2023-08-27 01:33:09,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=51895, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2065, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=625, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=57019, PETRI_PLACES=776, PETRI_TRANSITIONS=2204} [2023-08-27 01:33:09,692 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 743 predicate places. [2023-08-27 01:33:09,692 INFO L495 AbstractCegarLoop]: Abstraction has has 776 places, 2204 transitions, 57019 flow [2023-08-27 01:33:09,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 94.1842105263158) internal successors, (3579), 38 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 01:33:09,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:33:09,693 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:33:09,697 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 01:33:09,897 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,SelfDestructingSolverStorable51 [2023-08-27 01:33:09,897 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:33:09,897 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:33:09,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1460770096, now seen corresponding path program 13 times [2023-08-27 01:33:09,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:33:09,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771257424] [2023-08-27 01:33:09,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:33:09,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:33:09,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:33:11,073 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 01:33:11,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:33:11,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771257424] [2023-08-27 01:33:11,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771257424] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:33:11,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951254266] [2023-08-27 01:33:11,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 01:33:11,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:33:11,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:33:11,076 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 01:33:11,078 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 01:33:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:33:11,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 01:33:11,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:33:11,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:33:11,377 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 01:33:11,487 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 01:33:11,487 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:33:11,703 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:33:11,703 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 96 treesize of output 98 [2023-08-27 01:33:11,715 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:33:11,715 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 48 treesize of output 46 [2023-08-27 01:33:11,840 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 01:33:11,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951254266] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:33:11,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:33:11,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 28 [2023-08-27 01:33:11,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973158981] [2023-08-27 01:33:11,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:33:11,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 01:33:11,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:33:11,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 01:33:11,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=778, Unknown=4, NotChecked=0, Total=870 [2023-08-27 01:33:11,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 01:33:11,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 776 places, 2204 transitions, 57019 flow. Second operand has 30 states, 30 states have (on average 97.3) internal successors, (2919), 30 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:11,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:33:11,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 01:33:11,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:33:15,302 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:33:17,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:33:17,724 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse4 (* c_~q_front~0 4))) (let ((.cse1 (+ .cse4 c_~q~0.offset 4)) (.cse0 (select |c_#memory_int| c_~q~0.base)) (.cse3 (+ .cse4 c_~q~0.offset))) (and (= (select .cse0 .cse1) 1) (<= c_~s~0 0) (forall ((v_ArrVal_1766 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1766) c_~q~0.base))) (or (not (= (select .cse2 (+ c_~q~0.offset (* 4 c_~q_back~0))) 1)) (< (+ (select .cse2 .cse3) (select .cse2 .cse1)) 2147483648)))) (= (select .cse0 .cse3) 1)))) is different from false [2023-08-27 01:33:25,117 INFO L124 PetriNetUnfolderBase]: 6864/12222 cut-off events. [2023-08-27 01:33:25,117 INFO L125 PetriNetUnfolderBase]: For 392315/392321 co-relation queries the response was YES. [2023-08-27 01:33:25,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148961 conditions, 12222 events. 6864/12222 cut-off events. For 392315/392321 co-relation queries the response was YES. Maximal size of possible extension queue 681. Compared 93722 event pairs, 481 based on Foata normal form. 110/11968 useless extension candidates. Maximal degree in co-relation 148768. Up to 9438 conditions per place. [2023-08-27 01:33:25,278 INFO L140 encePairwiseOnDemand]: 305/317 looper letters, 1721 selfloop transitions, 777 changer transitions 0/2500 dead transitions. [2023-08-27 01:33:25,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 803 places, 2500 transitions, 69167 flow [2023-08-27 01:33:25,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-27 01:33:25,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-27 01:33:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2847 transitions. [2023-08-27 01:33:25,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32075259125732314 [2023-08-27 01:33:25,297 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2847 transitions. [2023-08-27 01:33:25,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2847 transitions. [2023-08-27 01:33:25,297 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:33:25,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2847 transitions. [2023-08-27 01:33:25,299 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 101.67857142857143) internal successors, (2847), 28 states have internal predecessors, (2847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:25,303 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 317.0) internal successors, (9193), 29 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:25,303 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 317.0) internal successors, (9193), 29 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:25,303 INFO L175 Difference]: Start difference. First operand has 776 places, 2204 transitions, 57019 flow. Second operand 28 states and 2847 transitions. [2023-08-27 01:33:25,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 803 places, 2500 transitions, 69167 flow [2023-08-27 01:33:30,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 774 places, 2500 transitions, 67385 flow, removed 688 selfloop flow, removed 29 redundant places. [2023-08-27 01:33:30,631 INFO L231 Difference]: Finished difference. Result has 781 places, 2347 transitions, 61661 flow [2023-08-27 01:33:30,633 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=55206, PETRI_DIFFERENCE_MINUEND_PLACES=747, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=660, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=61661, PETRI_PLACES=781, PETRI_TRANSITIONS=2347} [2023-08-27 01:33:30,633 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 748 predicate places. [2023-08-27 01:33:30,633 INFO L495 AbstractCegarLoop]: Abstraction has has 781 places, 2347 transitions, 61661 flow [2023-08-27 01:33:30,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 97.3) internal successors, (2919), 30 states have internal predecessors, (2919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:30,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:33:30,633 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:33:30,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-08-27 01:33:30,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:33:30,838 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:33:30,838 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:33:30,838 INFO L85 PathProgramCache]: Analyzing trace with hash -612014934, now seen corresponding path program 8 times [2023-08-27 01:33:30,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:33:30,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467613709] [2023-08-27 01:33:30,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:33:30,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:33:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:33:31,299 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 01:33:31,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:33:31,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467613709] [2023-08-27 01:33:31,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467613709] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:33:31,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479096155] [2023-08-27 01:33:31,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:33:31,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:33:31,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:33:31,301 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 01:33:31,302 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 01:33:31,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:33:31,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:33:31,461 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-27 01:33:31,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:33:31,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:33:31,614 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 01:33:31,659 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 01:33:31,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:33:31,768 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:33:31,768 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 01:33:31,770 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 01:33:31,829 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 01:33:31,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479096155] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:33:31,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:33:31,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 6] total 25 [2023-08-27 01:33:31,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699150341] [2023-08-27 01:33:31,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:33:31,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 01:33:31,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:33:31,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 01:33:31,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=623, Unknown=5, NotChecked=0, Total=702 [2023-08-27 01:33:31,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 01:33:31,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 781 places, 2347 transitions, 61661 flow. Second operand has 27 states, 27 states have (on average 97.44444444444444) internal successors, (2631), 27 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:31,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:33:31,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 01:33:31,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:33:41,044 INFO L124 PetriNetUnfolderBase]: 7157/12976 cut-off events. [2023-08-27 01:33:41,044 INFO L125 PetriNetUnfolderBase]: For 465147/465153 co-relation queries the response was YES. [2023-08-27 01:33:41,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161255 conditions, 12976 events. 7157/12976 cut-off events. For 465147/465153 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 103202 event pairs, 457 based on Foata normal form. 753/13343 useless extension candidates. Maximal degree in co-relation 161058. Up to 6340 conditions per place. [2023-08-27 01:33:41,357 INFO L140 encePairwiseOnDemand]: 307/317 looper letters, 1580 selfloop transitions, 1036 changer transitions 0/2618 dead transitions. [2023-08-27 01:33:41,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 799 places, 2618 transitions, 72515 flow [2023-08-27 01:33:41,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 01:33:41,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 01:33:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1946 transitions. [2023-08-27 01:33:41,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32309480325419226 [2023-08-27 01:33:41,359 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1946 transitions. [2023-08-27 01:33:41,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1946 transitions. [2023-08-27 01:33:41,359 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:33:41,359 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1946 transitions. [2023-08-27 01:33:41,361 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 102.42105263157895) internal successors, (1946), 19 states have internal predecessors, (1946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:41,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 317.0) internal successors, (6340), 20 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:41,364 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 317.0) internal successors, (6340), 20 states have internal predecessors, (6340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:41,364 INFO L175 Difference]: Start difference. First operand has 781 places, 2347 transitions, 61661 flow. Second operand 19 states and 1946 transitions. [2023-08-27 01:33:41,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 799 places, 2618 transitions, 72515 flow [2023-08-27 01:33:47,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 790 places, 2618 transitions, 71815 flow, removed 156 selfloop flow, removed 9 redundant places. [2023-08-27 01:33:47,913 INFO L231 Difference]: Finished difference. Result has 791 places, 2344 transitions, 63663 flow [2023-08-27 01:33:47,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=57894, PETRI_DIFFERENCE_MINUEND_PLACES=772, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=930, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=63663, PETRI_PLACES=791, PETRI_TRANSITIONS=2344} [2023-08-27 01:33:47,915 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 758 predicate places. [2023-08-27 01:33:47,915 INFO L495 AbstractCegarLoop]: Abstraction has has 791 places, 2344 transitions, 63663 flow [2023-08-27 01:33:47,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 97.44444444444444) internal successors, (2631), 27 states have internal predecessors, (2631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:47,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:33:47,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:33:47,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-08-27 01:33:48,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:33:48,120 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:33:48,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:33:48,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1612450949, now seen corresponding path program 1 times [2023-08-27 01:33:48,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:33:48,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340781233] [2023-08-27 01:33:48,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:33:48,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:33:48,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:33:48,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:33:48,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:33:48,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340781233] [2023-08-27 01:33:48,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340781233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:33:48,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:33:48,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-27 01:33:48,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280789693] [2023-08-27 01:33:48,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:33:48,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 01:33:48,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:33:48,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 01:33:48,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-27 01:33:48,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 317 [2023-08-27 01:33:48,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 791 places, 2344 transitions, 63663 flow. Second operand has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:48,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:33:48,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 317 [2023-08-27 01:33:48,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:33:56,575 INFO L124 PetriNetUnfolderBase]: 7198/13056 cut-off events. [2023-08-27 01:33:56,575 INFO L125 PetriNetUnfolderBase]: For 450143/450143 co-relation queries the response was YES. [2023-08-27 01:33:56,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 164909 conditions, 13056 events. 7198/13056 cut-off events. For 450143/450143 co-relation queries the response was YES. Maximal size of possible extension queue 767. Compared 103558 event pairs, 1483 based on Foata normal form. 8/12694 useless extension candidates. Maximal degree in co-relation 164711. Up to 12638 conditions per place. [2023-08-27 01:33:56,751 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 2281 selfloop transitions, 43 changer transitions 47/2371 dead transitions. [2023-08-27 01:33:56,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 798 places, 2371 transitions, 68651 flow [2023-08-27 01:33:56,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:33:56,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:33:56,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 949 transitions. [2023-08-27 01:33:56,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.374211356466877 [2023-08-27 01:33:56,753 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 949 transitions. [2023-08-27 01:33:56,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 949 transitions. [2023-08-27 01:33:56,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:33:56,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 949 transitions. [2023-08-27 01:33:56,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 118.625) internal successors, (949), 8 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:56,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 317.0) internal successors, (2853), 9 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:56,755 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 317.0) internal successors, (2853), 9 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:33:56,755 INFO L175 Difference]: Start difference. First operand has 791 places, 2344 transitions, 63663 flow. Second operand 8 states and 949 transitions. [2023-08-27 01:33:56,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 798 places, 2371 transitions, 68651 flow [2023-08-27 01:34:02,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 783 places, 2371 transitions, 67597 flow, removed 41 selfloop flow, removed 15 redundant places. [2023-08-27 01:34:02,633 INFO L231 Difference]: Finished difference. Result has 784 places, 2305 transitions, 61421 flow [2023-08-27 01:34:02,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=62609, PETRI_DIFFERENCE_MINUEND_PLACES=776, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=61421, PETRI_PLACES=784, PETRI_TRANSITIONS=2305} [2023-08-27 01:34:02,634 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 751 predicate places. [2023-08-27 01:34:02,634 INFO L495 AbstractCegarLoop]: Abstraction has has 784 places, 2305 transitions, 61421 flow [2023-08-27 01:34:02,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:02,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:34:02,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:34:02,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2023-08-27 01:34:02,635 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:34:02,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:34:02,635 INFO L85 PathProgramCache]: Analyzing trace with hash -617553389, now seen corresponding path program 2 times [2023-08-27 01:34:02,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:34:02,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773851018] [2023-08-27 01:34:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:34:02,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:34:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:34:02,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:34:02,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:34:02,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773851018] [2023-08-27 01:34:02,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773851018] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:34:02,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:34:02,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-27 01:34:02,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212213329] [2023-08-27 01:34:02,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:34:02,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 01:34:02,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:34:02,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 01:34:02,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-27 01:34:02,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 317 [2023-08-27 01:34:02,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 784 places, 2305 transitions, 61421 flow. Second operand has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:02,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:34:02,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 317 [2023-08-27 01:34:02,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:34:10,608 INFO L124 PetriNetUnfolderBase]: 7144/12915 cut-off events. [2023-08-27 01:34:10,608 INFO L125 PetriNetUnfolderBase]: For 440259/440259 co-relation queries the response was YES. [2023-08-27 01:34:10,724 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161186 conditions, 12915 events. 7144/12915 cut-off events. For 440259/440259 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 102412 event pairs, 1505 based on Foata normal form. 4/12551 useless extension candidates. Maximal degree in co-relation 160997. Up to 12682 conditions per place. [2023-08-27 01:34:10,800 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 2270 selfloop transitions, 47 changer transitions 20/2337 dead transitions. [2023-08-27 01:34:10,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 780 places, 2337 transitions, 66961 flow [2023-08-27 01:34:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:34:10,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:34:10,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 944 transitions. [2023-08-27 01:34:10,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3722397476340694 [2023-08-27 01:34:10,802 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 944 transitions. [2023-08-27 01:34:10,802 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 944 transitions. [2023-08-27 01:34:10,802 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:34:10,802 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 944 transitions. [2023-08-27 01:34:10,803 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 118.0) internal successors, (944), 8 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:10,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 317.0) internal successors, (2853), 9 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:10,804 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 317.0) internal successors, (2853), 9 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:10,804 INFO L175 Difference]: Start difference. First operand has 784 places, 2305 transitions, 61421 flow. Second operand 8 states and 944 transitions. [2023-08-27 01:34:10,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 780 places, 2337 transitions, 66961 flow [2023-08-27 01:34:16,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 760 places, 2337 transitions, 66318 flow, removed 43 selfloop flow, removed 20 redundant places. [2023-08-27 01:34:16,883 INFO L231 Difference]: Finished difference. Result has 763 places, 2313 transitions, 61215 flow [2023-08-27 01:34:16,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=60870, PETRI_DIFFERENCE_MINUEND_PLACES=753, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=61215, PETRI_PLACES=763, PETRI_TRANSITIONS=2313} [2023-08-27 01:34:16,884 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 730 predicate places. [2023-08-27 01:34:16,884 INFO L495 AbstractCegarLoop]: Abstraction has has 763 places, 2313 transitions, 61215 flow [2023-08-27 01:34:16,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:16,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:34:16,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:34:16,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2023-08-27 01:34:16,885 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:34:16,885 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:34:16,885 INFO L85 PathProgramCache]: Analyzing trace with hash 577073619, now seen corresponding path program 3 times [2023-08-27 01:34:16,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:34:16,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158583662] [2023-08-27 01:34:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:34:16,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:34:16,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:34:17,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:34:17,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:34:17,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158583662] [2023-08-27 01:34:17,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158583662] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 01:34:17,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 01:34:17,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-27 01:34:17,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242929133] [2023-08-27 01:34:17,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 01:34:17,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 01:34:17,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:34:17,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 01:34:17,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-27 01:34:17,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 317 [2023-08-27 01:34:17,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 763 places, 2313 transitions, 61215 flow. Second operand has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:17,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:34:17,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 317 [2023-08-27 01:34:17,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:34:24,669 INFO L124 PetriNetUnfolderBase]: 7115/12844 cut-off events. [2023-08-27 01:34:24,669 INFO L125 PetriNetUnfolderBase]: For 432220/432220 co-relation queries the response was YES. [2023-08-27 01:34:24,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159527 conditions, 12844 events. 7115/12844 cut-off events. For 432220/432220 co-relation queries the response was YES. Maximal size of possible extension queue 769. Compared 101617 event pairs, 1483 based on Foata normal form. 4/12480 useless extension candidates. Maximal degree in co-relation 159339. Up to 12611 conditions per place. [2023-08-27 01:34:24,848 INFO L140 encePairwiseOnDemand]: 309/317 looper letters, 2272 selfloop transitions, 40 changer transitions 25/2337 dead transitions. [2023-08-27 01:34:24,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 768 places, 2337 transitions, 66124 flow [2023-08-27 01:34:24,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 01:34:24,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 01:34:24,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 944 transitions. [2023-08-27 01:34:24,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3722397476340694 [2023-08-27 01:34:24,850 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 944 transitions. [2023-08-27 01:34:24,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 944 transitions. [2023-08-27 01:34:24,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:34:24,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 944 transitions. [2023-08-27 01:34:24,851 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 118.0) internal successors, (944), 8 states have internal predecessors, (944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:24,852 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 317.0) internal successors, (2853), 9 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:24,852 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 317.0) internal successors, (2853), 9 states have internal predecessors, (2853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:24,852 INFO L175 Difference]: Start difference. First operand has 763 places, 2313 transitions, 61215 flow. Second operand 8 states and 944 transitions. [2023-08-27 01:34:24,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 768 places, 2337 transitions, 66124 flow [2023-08-27 01:34:30,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 762 places, 2337 transitions, 65758 flow, removed 15 selfloop flow, removed 6 redundant places. [2023-08-27 01:34:30,406 INFO L231 Difference]: Finished difference. Result has 764 places, 2300 transitions, 60523 flow [2023-08-27 01:34:30,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=60853, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=60523, PETRI_PLACES=764, PETRI_TRANSITIONS=2300} [2023-08-27 01:34:30,408 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 731 predicate places. [2023-08-27 01:34:30,408 INFO L495 AbstractCegarLoop]: Abstraction has has 764 places, 2300 transitions, 60523 flow [2023-08-27 01:34:30,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 114.875) internal successors, (919), 8 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:30,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:34:30,408 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:34:30,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2023-08-27 01:34:30,408 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:34:30,408 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:34:30,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1135206653, now seen corresponding path program 14 times [2023-08-27 01:34:30,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:34:30,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609723360] [2023-08-27 01:34:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:34:30,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:34:30,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:34:30,957 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 01:34:30,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:34:30,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609723360] [2023-08-27 01:34:30,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609723360] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:34:30,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673945779] [2023-08-27 01:34:30,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 01:34:30,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:34:30,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:34:30,967 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 01:34:30,969 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 01:34:31,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 01:34:31,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:34:31,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-27 01:34:31,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:34:31,197 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:34:31,227 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:34:31,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:34:31,524 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 01:34:31,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:34:32,135 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:34:32,135 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 177 treesize of output 117 [2023-08-27 01:34:32,223 INFO L322 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2023-08-27 01:34:32,223 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 752 treesize of output 736 [2023-08-27 01:34:32,243 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:34:32,243 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:34:32,246 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 01:34:32,293 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:34:32,293 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 240 treesize of output 286 [2023-08-27 01:34:32,385 INFO L322 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2023-08-27 01:34:32,385 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 241 treesize of output 249 [2023-08-27 01:34:36,509 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 01:34:36,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673945779] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:34:36,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:34:36,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 35 [2023-08-27 01:34:36,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940746091] [2023-08-27 01:34:36,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:34:36,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-27 01:34:36,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:34:36,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-27 01:34:36,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1128, Unknown=3, NotChecked=0, Total=1332 [2023-08-27 01:34:36,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:34:36,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 764 places, 2300 transitions, 60523 flow. Second operand has 37 states, 37 states have (on average 94.21621621621621) internal successors, (3486), 37 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:36,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:34:36,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:34:36,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:34:39,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 01:34:50,180 INFO L124 PetriNetUnfolderBase]: 7068/12730 cut-off events. [2023-08-27 01:34:50,181 INFO L125 PetriNetUnfolderBase]: For 431817/431845 co-relation queries the response was YES. [2023-08-27 01:34:50,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158012 conditions, 12730 events. 7068/12730 cut-off events. For 431817/431845 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 100822 event pairs, 1714 based on Foata normal form. 2/12358 useless extension candidates. Maximal degree in co-relation 157825. Up to 8478 conditions per place. [2023-08-27 01:34:50,353 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 2185 selfloop transitions, 200 changer transitions 1/2390 dead transitions. [2023-08-27 01:34:50,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 783 places, 2390 transitions, 66247 flow [2023-08-27 01:34:50,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 01:34:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 01:34:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3139 transitions. [2023-08-27 01:34:50,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30944400630914826 [2023-08-27 01:34:50,355 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3139 transitions. [2023-08-27 01:34:50,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3139 transitions. [2023-08-27 01:34:50,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:34:50,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3139 transitions. [2023-08-27 01:34:50,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 98.09375) internal successors, (3139), 32 states have internal predecessors, (3139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:50,361 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 317.0) internal successors, (10461), 33 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:50,362 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 317.0) internal successors, (10461), 33 states have internal predecessors, (10461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:50,362 INFO L175 Difference]: Start difference. First operand has 764 places, 2300 transitions, 60523 flow. Second operand 32 states and 3139 transitions. [2023-08-27 01:34:50,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 783 places, 2390 transitions, 66247 flow [2023-08-27 01:34:55,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 775 places, 2390 transitions, 65837 flow, removed 38 selfloop flow, removed 8 redundant places. [2023-08-27 01:34:55,811 INFO L231 Difference]: Finished difference. Result has 777 places, 2309 transitions, 60838 flow [2023-08-27 01:34:55,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=60115, PETRI_DIFFERENCE_MINUEND_PLACES=744, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=60838, PETRI_PLACES=777, PETRI_TRANSITIONS=2309} [2023-08-27 01:34:55,813 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 744 predicate places. [2023-08-27 01:34:55,813 INFO L495 AbstractCegarLoop]: Abstraction has has 777 places, 2309 transitions, 60838 flow [2023-08-27 01:34:55,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 94.21621621621621) internal successors, (3486), 37 states have internal predecessors, (3486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:55,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:34:55,814 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:34:55,821 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 01:34:56,018 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,SelfDestructingSolverStorable57 [2023-08-27 01:34:56,019 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:34:56,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:34:56,019 INFO L85 PathProgramCache]: Analyzing trace with hash -1209810082, now seen corresponding path program 5 times [2023-08-27 01:34:56,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:34:56,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568769653] [2023-08-27 01:34:56,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:34:56,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:34:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:34:56,728 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 01:34:56,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:34:56,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568769653] [2023-08-27 01:34:56,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568769653] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:34:56,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673700619] [2023-08-27 01:34:56,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:34:56,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:34:56,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:34:56,730 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 01:34:56,732 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 01:34:56,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 01:34:56,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:34:56,886 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 01:34:56,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:34:57,090 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 01:34:57,091 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:34:57,304 INFO L322 Elim1Store]: treesize reduction 21, result has 75.3 percent of original size [2023-08-27 01:34:57,305 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 72 treesize of output 83 [2023-08-27 01:34:57,339 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 01:34:57,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673700619] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:34:57,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:34:57,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 26 [2023-08-27 01:34:57,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450958296] [2023-08-27 01:34:57,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:34:57,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 01:34:57,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:34:57,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 01:34:57,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=0, NotChecked=0, Total=756 [2023-08-27 01:34:57,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 01:34:57,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 777 places, 2309 transitions, 60838 flow. Second operand has 28 states, 28 states have (on average 101.35714285714286) internal successors, (2838), 28 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:34:57,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:34:57,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 01:34:57,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:35:11,089 INFO L124 PetriNetUnfolderBase]: 8433/15189 cut-off events. [2023-08-27 01:35:11,090 INFO L125 PetriNetUnfolderBase]: For 585337/585365 co-relation queries the response was YES. [2023-08-27 01:35:11,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191106 conditions, 15189 events. 8433/15189 cut-off events. For 585337/585365 co-relation queries the response was YES. Maximal size of possible extension queue 904. Compared 123949 event pairs, 1573 based on Foata normal form. 308/15082 useless extension candidates. Maximal degree in co-relation 190920. Up to 9612 conditions per place. [2023-08-27 01:35:11,296 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 1734 selfloop transitions, 1288 changer transitions 18/3044 dead transitions. [2023-08-27 01:35:11,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 833 places, 3044 transitions, 86520 flow [2023-08-27 01:35:11,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-08-27 01:35:11,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2023-08-27 01:35:11,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 6063 transitions. [2023-08-27 01:35:11,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33554706956666114 [2023-08-27 01:35:11,300 INFO L72 ComplementDD]: Start complementDD. Operand 57 states and 6063 transitions. [2023-08-27 01:35:11,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 57 states and 6063 transitions. [2023-08-27 01:35:11,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:35:11,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 57 states and 6063 transitions. [2023-08-27 01:35:11,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 58 states, 57 states have (on average 106.36842105263158) internal successors, (6063), 57 states have internal predecessors, (6063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:11,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 58 states, 58 states have (on average 317.0) internal successors, (18386), 58 states have internal predecessors, (18386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:11,312 INFO L81 ComplementDD]: Finished complementDD. Result has 58 states, 58 states have (on average 317.0) internal successors, (18386), 58 states have internal predecessors, (18386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:11,312 INFO L175 Difference]: Start difference. First operand has 777 places, 2309 transitions, 60838 flow. Second operand 57 states and 6063 transitions. [2023-08-27 01:35:11,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 833 places, 3044 transitions, 86520 flow [2023-08-27 01:35:18,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 814 places, 3044 transitions, 86217 flow, removed 23 selfloop flow, removed 19 redundant places. [2023-08-27 01:35:18,249 INFO L231 Difference]: Finished difference. Result has 844 places, 2827 transitions, 82564 flow [2023-08-27 01:35:18,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=59544, PETRI_DIFFERENCE_MINUEND_PLACES=758, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=824, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=82564, PETRI_PLACES=844, PETRI_TRANSITIONS=2827} [2023-08-27 01:35:18,251 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 811 predicate places. [2023-08-27 01:35:18,251 INFO L495 AbstractCegarLoop]: Abstraction has has 844 places, 2827 transitions, 82564 flow [2023-08-27 01:35:18,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 101.35714285714286) internal successors, (2838), 28 states have internal predecessors, (2838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:18,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:35:18,251 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:35:18,256 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 01:35:18,455 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,SelfDestructingSolverStorable58 [2023-08-27 01:35:18,455 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:35:18,456 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:35:18,456 INFO L85 PathProgramCache]: Analyzing trace with hash 224080090, now seen corresponding path program 4 times [2023-08-27 01:35:18,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:35:18,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942992885] [2023-08-27 01:35:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:35:18,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:35:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:35:18,733 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 01:35:18,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:35:18,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942992885] [2023-08-27 01:35:18,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942992885] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:35:18,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954026140] [2023-08-27 01:35:18,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:35:18,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:35:18,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:35:18,735 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 01:35:18,736 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 01:35:18,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:35:18,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:35:18,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 01:35:18,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:35:19,093 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 01:35:19,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:35:19,117 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:35:19,117 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 01:35:19,379 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 01:35:19,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954026140] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:35:19,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:35:19,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 30 [2023-08-27 01:35:19,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672339242] [2023-08-27 01:35:19,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:35:19,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 01:35:19,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:35:19,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 01:35:19,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2023-08-27 01:35:19,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 01:35:19,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 844 places, 2827 transitions, 82564 flow. Second operand has 32 states, 32 states have (on average 101.40625) internal successors, (3245), 32 states have internal predecessors, (3245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:19,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:35:19,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 01:35:19,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:35:31,654 INFO L124 PetriNetUnfolderBase]: 7300/13014 cut-off events. [2023-08-27 01:35:31,654 INFO L125 PetriNetUnfolderBase]: For 572784/572812 co-relation queries the response was YES. [2023-08-27 01:35:31,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179367 conditions, 13014 events. 7300/13014 cut-off events. For 572784/572812 co-relation queries the response was YES. Maximal size of possible extension queue 859. Compared 103807 event pairs, 436 based on Foata normal form. 182/13024 useless extension candidates. Maximal degree in co-relation 179151. Up to 8099 conditions per place. [2023-08-27 01:35:31,847 INFO L140 encePairwiseOnDemand]: 307/317 looper letters, 1435 selfloop transitions, 1072 changer transitions 23/2534 dead transitions. [2023-08-27 01:35:31,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 849 places, 2534 transitions, 79931 flow [2023-08-27 01:35:31,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-27 01:35:31,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-27 01:35:31,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3198 transitions. [2023-08-27 01:35:31,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3362776025236593 [2023-08-27 01:35:31,850 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3198 transitions. [2023-08-27 01:35:31,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3198 transitions. [2023-08-27 01:35:31,850 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:35:31,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3198 transitions. [2023-08-27 01:35:31,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 106.6) internal successors, (3198), 30 states have internal predecessors, (3198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:31,856 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 317.0) internal successors, (9827), 31 states have internal predecessors, (9827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:31,856 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 317.0) internal successors, (9827), 31 states have internal predecessors, (9827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:31,856 INFO L175 Difference]: Start difference. First operand has 844 places, 2827 transitions, 82564 flow. Second operand 30 states and 3198 transitions. [2023-08-27 01:35:31,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 849 places, 2534 transitions, 79931 flow [2023-08-27 01:35:39,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 791 places, 2534 transitions, 76648 flow, removed 1017 selfloop flow, removed 58 redundant places. [2023-08-27 01:35:39,911 INFO L231 Difference]: Finished difference. Result has 791 places, 2415 transitions, 72465 flow [2023-08-27 01:35:39,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=70230, PETRI_DIFFERENCE_MINUEND_PLACES=762, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1042, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=72465, PETRI_PLACES=791, PETRI_TRANSITIONS=2415} [2023-08-27 01:35:39,912 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 758 predicate places. [2023-08-27 01:35:39,912 INFO L495 AbstractCegarLoop]: Abstraction has has 791 places, 2415 transitions, 72465 flow [2023-08-27 01:35:39,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 101.40625) internal successors, (3245), 32 states have internal predecessors, (3245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:39,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:35:39,913 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:35:39,919 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 01:35:40,117 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,SelfDestructingSolverStorable59 [2023-08-27 01:35:40,118 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:35:40,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:35:40,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1215754002, now seen corresponding path program 6 times [2023-08-27 01:35:40,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:35:40,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462912431] [2023-08-27 01:35:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:35:40,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:35:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:35:41,380 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 01:35:41,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:35:41,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462912431] [2023-08-27 01:35:41,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462912431] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:35:41,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570300786] [2023-08-27 01:35:41,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:35:41,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:35:41,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:35:41,381 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 01:35:41,383 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 01:35:41,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 01:35:41,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:35:41,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 29 conjunts are in the unsatisfiable core [2023-08-27 01:35:41,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:35:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 01:35:41,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:35:41,741 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:35:41,742 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 01:35:41,777 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 01:35:41,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570300786] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:35:41,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:35:41,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 5] total 22 [2023-08-27 01:35:41,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85810774] [2023-08-27 01:35:41,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:35:41,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 01:35:41,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:35:41,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 01:35:41,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2023-08-27 01:35:41,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:35:41,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 791 places, 2415 transitions, 72465 flow. Second operand has 24 states, 24 states have (on average 94.45833333333333) internal successors, (2267), 24 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:41,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:35:41,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:35:41,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:35:52,721 INFO L124 PetriNetUnfolderBase]: 7271/12911 cut-off events. [2023-08-27 01:35:52,721 INFO L125 PetriNetUnfolderBase]: For 558823/558851 co-relation queries the response was YES. [2023-08-27 01:35:52,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173634 conditions, 12911 events. 7271/12911 cut-off events. For 558823/558851 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 101356 event pairs, 420 based on Foata normal form. 156/12946 useless extension candidates. Maximal degree in co-relation 173443. Up to 8323 conditions per place. [2023-08-27 01:35:53,053 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 1253 selfloop transitions, 1262 changer transitions 4/2523 dead transitions. [2023-08-27 01:35:53,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 813 places, 2523 transitions, 79634 flow [2023-08-27 01:35:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 01:35:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 01:35:53,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2493 transitions. [2023-08-27 01:35:53,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3145741324921136 [2023-08-27 01:35:53,056 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2493 transitions. [2023-08-27 01:35:53,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2493 transitions. [2023-08-27 01:35:53,056 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:35:53,056 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2493 transitions. [2023-08-27 01:35:53,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 99.72) internal successors, (2493), 25 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:53,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 317.0) internal successors, (8242), 26 states have internal predecessors, (8242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:53,062 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 317.0) internal successors, (8242), 26 states have internal predecessors, (8242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:53,062 INFO L175 Difference]: Start difference. First operand has 791 places, 2415 transitions, 72465 flow. Second operand 25 states and 2493 transitions. [2023-08-27 01:35:53,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 813 places, 2523 transitions, 79634 flow [2023-08-27 01:35:59,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 791 places, 2523 transitions, 77066 flow, removed 110 selfloop flow, removed 22 redundant places. [2023-08-27 01:35:59,876 INFO L231 Difference]: Finished difference. Result has 793 places, 2423 transitions, 73630 flow [2023-08-27 01:35:59,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=68767, PETRI_DIFFERENCE_MINUEND_PLACES=767, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=73630, PETRI_PLACES=793, PETRI_TRANSITIONS=2423} [2023-08-27 01:35:59,878 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 760 predicate places. [2023-08-27 01:35:59,878 INFO L495 AbstractCegarLoop]: Abstraction has has 793 places, 2423 transitions, 73630 flow [2023-08-27 01:35:59,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 94.45833333333333) internal successors, (2267), 24 states have internal predecessors, (2267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:35:59,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:35:59,878 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:35:59,899 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 01:36:00,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:36:00,083 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:36:00,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:36:00,084 INFO L85 PathProgramCache]: Analyzing trace with hash 556003013, now seen corresponding path program 15 times [2023-08-27 01:36:00,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:36:00,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394234836] [2023-08-27 01:36:00,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:36:00,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:36:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:36:00,574 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 01:36:00,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:36:00,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394234836] [2023-08-27 01:36:00,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394234836] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:36:00,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288998629] [2023-08-27 01:36:00,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 01:36:00,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:36:00,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:36:00,575 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 01:36:00,578 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 01:36:00,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 01:36:00,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:36:00,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-27 01:36:00,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:36:00,977 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 01:36:00,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:36:01,131 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:36:01,131 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 72 treesize of output 104 [2023-08-27 01:36:01,196 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 01:36:01,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288998629] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:36:01,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:36:01,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 24 [2023-08-27 01:36:01,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428464554] [2023-08-27 01:36:01,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:36:01,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 01:36:01,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:36:01,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 01:36:01,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2023-08-27 01:36:01,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 317 [2023-08-27 01:36:01,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 793 places, 2423 transitions, 73630 flow. Second operand has 26 states, 26 states have (on average 101.34615384615384) internal successors, (2635), 26 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:01,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:36:01,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 317 [2023-08-27 01:36:01,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:36:15,710 INFO L124 PetriNetUnfolderBase]: 7697/13603 cut-off events. [2023-08-27 01:36:15,711 INFO L125 PetriNetUnfolderBase]: For 632948/632976 co-relation queries the response was YES. [2023-08-27 01:36:15,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184316 conditions, 13603 events. 7697/13603 cut-off events. For 632948/632976 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 106936 event pairs, 1236 based on Foata normal form. 346/13802 useless extension candidates. Maximal degree in co-relation 184124. Up to 9710 conditions per place. [2023-08-27 01:36:15,923 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 1748 selfloop transitions, 926 changer transitions 4/2682 dead transitions. [2023-08-27 01:36:15,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 827 places, 2682 transitions, 85114 flow [2023-08-27 01:36:15,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-27 01:36:15,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-27 01:36:15,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 4001 transitions. [2023-08-27 01:36:15,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3321434501079196 [2023-08-27 01:36:15,927 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 4001 transitions. [2023-08-27 01:36:15,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 4001 transitions. [2023-08-27 01:36:15,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:36:15,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 4001 transitions. [2023-08-27 01:36:15,930 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 105.28947368421052) internal successors, (4001), 38 states have internal predecessors, (4001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:15,934 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 317.0) internal successors, (12363), 39 states have internal predecessors, (12363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:15,935 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 317.0) internal successors, (12363), 39 states have internal predecessors, (12363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:15,935 INFO L175 Difference]: Start difference. First operand has 793 places, 2423 transitions, 73630 flow. Second operand 38 states and 4001 transitions. [2023-08-27 01:36:15,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 827 places, 2682 transitions, 85114 flow [2023-08-27 01:36:24,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 818 places, 2682 transitions, 84362 flow, removed 282 selfloop flow, removed 9 redundant places. [2023-08-27 01:36:24,523 INFO L231 Difference]: Finished difference. Result has 826 places, 2527 transitions, 80101 flow [2023-08-27 01:36:24,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=71730, PETRI_DIFFERENCE_MINUEND_PLACES=781, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=805, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=80101, PETRI_PLACES=826, PETRI_TRANSITIONS=2527} [2023-08-27 01:36:24,525 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 793 predicate places. [2023-08-27 01:36:24,525 INFO L495 AbstractCegarLoop]: Abstraction has has 826 places, 2527 transitions, 80101 flow [2023-08-27 01:36:24,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 101.34615384615384) internal successors, (2635), 26 states have internal predecessors, (2635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:24,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:36:24,526 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:36:24,530 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 01:36:24,730 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,SelfDestructingSolverStorable61 [2023-08-27 01:36:24,730 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:36:24,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:36:24,731 INFO L85 PathProgramCache]: Analyzing trace with hash 806280993, now seen corresponding path program 16 times [2023-08-27 01:36:24,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:36:24,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551929416] [2023-08-27 01:36:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:36:24,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:36:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:36:25,617 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 01:36:25,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:36:25,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551929416] [2023-08-27 01:36:25,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551929416] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:36:25,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472525502] [2023-08-27 01:36:25,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 01:36:25,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:36:25,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:36:25,618 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 01:36:25,620 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 01:36:25,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 01:36:25,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:36:25,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-27 01:36:25,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:36:25,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 01:36:25,972 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 01:36:26,099 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 01:36:26,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:36:26,418 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:36:26,418 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 106 treesize of output 138 [2023-08-27 01:36:26,466 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:36:26,467 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 26 treesize of output 6 [2023-08-27 01:36:26,542 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 01:36:26,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472525502] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:36:26,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:36:26,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 9] total 34 [2023-08-27 01:36:26,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730120192] [2023-08-27 01:36:26,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:36:26,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-27 01:36:26,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:36:26,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-27 01:36:26,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1130, Unknown=2, NotChecked=0, Total=1260 [2023-08-27 01:36:26,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 317 [2023-08-27 01:36:26,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 826 places, 2527 transitions, 80101 flow. Second operand has 36 states, 36 states have (on average 97.25) internal successors, (3501), 36 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:26,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:36:26,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 317 [2023-08-27 01:36:26,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:36:58,875 INFO L124 PetriNetUnfolderBase]: 12945/22302 cut-off events. [2023-08-27 01:36:58,875 INFO L125 PetriNetUnfolderBase]: For 1137545/1137573 co-relation queries the response was YES. [2023-08-27 01:36:59,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 311305 conditions, 22302 events. 12945/22302 cut-off events. For 1137545/1137573 co-relation queries the response was YES. Maximal size of possible extension queue 1243. Compared 180674 event pairs, 150 based on Foata normal form. 1470/23341 useless extension candidates. Maximal degree in co-relation 311106. Up to 9744 conditions per place. [2023-08-27 01:36:59,543 INFO L140 encePairwiseOnDemand]: 306/317 looper letters, 1278 selfloop transitions, 3688 changer transitions 2/4972 dead transitions. [2023-08-27 01:36:59,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 951 places, 4972 transitions, 155259 flow [2023-08-27 01:36:59,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-08-27 01:36:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2023-08-27 01:36:59,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 13306 transitions. [2023-08-27 01:36:59,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32288279543800047 [2023-08-27 01:36:59,551 INFO L72 ComplementDD]: Start complementDD. Operand 130 states and 13306 transitions. [2023-08-27 01:36:59,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 130 states and 13306 transitions. [2023-08-27 01:36:59,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:36:59,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 130 states and 13306 transitions. [2023-08-27 01:36:59,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 131 states, 130 states have (on average 102.35384615384615) internal successors, (13306), 130 states have internal predecessors, (13306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:59,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 131 states, 131 states have (on average 317.0) internal successors, (41527), 131 states have internal predecessors, (41527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:59,587 INFO L81 ComplementDD]: Finished complementDD. Result has 131 states, 131 states have (on average 317.0) internal successors, (41527), 131 states have internal predecessors, (41527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:36:59,588 INFO L175 Difference]: Start difference. First operand has 826 places, 2527 transitions, 80101 flow. Second operand 130 states and 13306 transitions. [2023-08-27 01:36:59,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 951 places, 4972 transitions, 155259 flow [2023-08-27 01:37:17,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 936 places, 4972 transitions, 153113 flow, removed 905 selfloop flow, removed 15 redundant places. [2023-08-27 01:37:17,387 INFO L231 Difference]: Finished difference. Result has 989 places, 4458 transitions, 147450 flow [2023-08-27 01:37:17,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=75151, PETRI_DIFFERENCE_MINUEND_PLACES=807, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1857, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=130, PETRI_FLOW=147450, PETRI_PLACES=989, PETRI_TRANSITIONS=4458} [2023-08-27 01:37:17,389 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 956 predicate places. [2023-08-27 01:37:17,389 INFO L495 AbstractCegarLoop]: Abstraction has has 989 places, 4458 transitions, 147450 flow [2023-08-27 01:37:17,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 97.25) internal successors, (3501), 36 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:17,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:37:17,389 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:37:17,413 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 01:37:17,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:37:17,597 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:37:17,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:37:17,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1794947841, now seen corresponding path program 17 times [2023-08-27 01:37:17,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:37:17,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838431079] [2023-08-27 01:37:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:37:17,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:37:17,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:37:18,319 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 01:37:18,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:37:18,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838431079] [2023-08-27 01:37:18,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838431079] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:37:18,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10338949] [2023-08-27 01:37:18,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 01:37:18,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:37:18,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:37:18,321 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 01:37:18,322 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 01:37:18,477 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 01:37:18,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:37:18,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 01:37:18,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:37:18,685 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 01:37:18,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:37:18,858 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 01:37:18,858 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 72 treesize of output 104 [2023-08-27 01:37:18,941 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 01:37:18,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10338949] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 01:37:18,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 01:37:18,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 27 [2023-08-27 01:37:18,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374054086] [2023-08-27 01:37:18,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 01:37:18,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 01:37:18,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 01:37:18,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 01:37:18,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=714, Unknown=0, NotChecked=0, Total=812 [2023-08-27 01:37:18,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 317 [2023-08-27 01:37:18,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 989 places, 4458 transitions, 147450 flow. Second operand has 29 states, 29 states have (on average 94.3103448275862) internal successors, (2735), 29 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:18,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 01:37:18,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 317 [2023-08-27 01:37:18,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 01:37:57,977 INFO L124 PetriNetUnfolderBase]: 13775/23659 cut-off events. [2023-08-27 01:37:57,977 INFO L125 PetriNetUnfolderBase]: For 1243154/1243182 co-relation queries the response was YES. [2023-08-27 01:37:58,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351216 conditions, 23659 events. 13775/23659 cut-off events. For 1243154/1243182 co-relation queries the response was YES. Maximal size of possible extension queue 1256. Compared 190341 event pairs, 2046 based on Foata normal form. 316/23709 useless extension candidates. Maximal degree in co-relation 350967. Up to 20371 conditions per place. [2023-08-27 01:37:59,136 INFO L140 encePairwiseOnDemand]: 307/317 looper letters, 3875 selfloop transitions, 1069 changer transitions 7/4955 dead transitions. [2023-08-27 01:37:59,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1028 places, 4955 transitions, 172270 flow [2023-08-27 01:37:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-27 01:37:59,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-27 01:37:59,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4022 transitions. [2023-08-27 01:37:59,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30945602831422636 [2023-08-27 01:37:59,139 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4022 transitions. [2023-08-27 01:37:59,139 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4022 transitions. [2023-08-27 01:37:59,140 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 01:37:59,140 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4022 transitions. [2023-08-27 01:37:59,142 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 98.09756097560975) internal successors, (4022), 41 states have internal predecessors, (4022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:59,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 317.0) internal successors, (13314), 42 states have internal predecessors, (13314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:59,148 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 317.0) internal successors, (13314), 42 states have internal predecessors, (13314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:37:59,148 INFO L175 Difference]: Start difference. First operand has 989 places, 4458 transitions, 147450 flow. Second operand 41 states and 4022 transitions. [2023-08-27 01:37:59,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1028 places, 4955 transitions, 172270 flow [2023-08-27 01:38:31,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1012 places, 4955 transitions, 151815 flow, removed 9152 selfloop flow, removed 16 redundant places. [2023-08-27 01:38:31,539 INFO L231 Difference]: Finished difference. Result has 1021 places, 4752 transitions, 142831 flow [2023-08-27 01:38:31,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=317, PETRI_DIFFERENCE_MINUEND_FLOW=128115, PETRI_DIFFERENCE_MINUEND_PLACES=972, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=4424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=807, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=3458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=142831, PETRI_PLACES=1021, PETRI_TRANSITIONS=4752} [2023-08-27 01:38:31,543 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 988 predicate places. [2023-08-27 01:38:31,543 INFO L495 AbstractCegarLoop]: Abstraction has has 1021 places, 4752 transitions, 142831 flow [2023-08-27 01:38:31,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 94.3103448275862) internal successors, (2735), 29 states have internal predecessors, (2735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 01:38:31,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 01:38:31,544 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:38:31,551 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 01:38:31,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:38:31,749 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (and 22 more)] === [2023-08-27 01:38:31,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 01:38:31,749 INFO L85 PathProgramCache]: Analyzing trace with hash -569165437, now seen corresponding path program 18 times [2023-08-27 01:38:31,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 01:38:31,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899855290] [2023-08-27 01:38:31,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 01:38:31,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 01:38:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 01:38:32,239 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 01:38:32,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 01:38:32,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899855290] [2023-08-27 01:38:32,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899855290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 01:38:32,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113268665] [2023-08-27 01:38:32,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 01:38:32,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:38:32,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 01:38:32,240 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 01:38:32,242 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 01:38:32,406 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 01:38:32,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 01:38:32,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 62 conjunts are in the unsatisfiable core [2023-08-27 01:38:32,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 01:38:32,435 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:38:32,460 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:38:32,494 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-27 01:38:32,524 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:38:32,549 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 01:38:32,811 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 01:38:32,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 01:38:33,810 INFO L322 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2023-08-27 01:38:33,810 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 260 treesize of output 154 [2023-08-27 01:38:33,993 INFO L322 Elim1Store]: treesize reduction 42, result has 81.7 percent of original size [2023-08-27 01:38:33,994 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 390 treesize of output 511 [2023-08-27 01:38:34,127 INFO L322 Elim1Store]: treesize reduction 42, result has 65.3 percent of original size [2023-08-27 01:38:34,127 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 303 treesize of output 307 [2023-08-27 01:38:34,249 INFO L322 Elim1Store]: treesize reduction 42, result has 65.3 percent of original size [2023-08-27 01:38:34,249 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 202 treesize of output 243 Received shutdown request... [2023-08-27 01:40:40,935 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 25 remaining) [2023-08-27 01:40:40,941 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 01:40:40,978 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 01:40:40,978 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 01:40:41,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 01:40:41,140 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. [2023-08-27 01:40:41,142 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 25 remaining) [2023-08-27 01:40:41,142 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 25 remaining) [2023-08-27 01:40:41,142 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 25 remaining) [2023-08-27 01:40:41,142 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 25 remaining) [2023-08-27 01:40:41,142 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 25 remaining) [2023-08-27 01:40:41,142 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 25 remaining) [2023-08-27 01:40:41,142 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 25 remaining) [2023-08-27 01:40:41,143 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 25 remaining) [2023-08-27 01:40:41,143 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 25 remaining) [2023-08-27 01:40:41,143 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 25 remaining) [2023-08-27 01:40:41,143 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 25 remaining) [2023-08-27 01:40:41,143 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 25 remaining) [2023-08-27 01:40:41,143 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (11 of 25 remaining) [2023-08-27 01:40:41,143 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 25 remaining) [2023-08-27 01:40:41,143 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 25 remaining) [2023-08-27 01:40:41,143 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 25 remaining) [2023-08-27 01:40:41,143 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 25 remaining) [2023-08-27 01:40:41,143 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 25 remaining) [2023-08-27 01:40:41,143 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 25 remaining) [2023-08-27 01:40:41,143 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 25 remaining) [2023-08-27 01:40:41,144 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 25 remaining) [2023-08-27 01:40:41,144 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 25 remaining) [2023-08-27 01:40:41,144 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 25 remaining) [2023-08-27 01:40:41,144 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 25 remaining) [2023-08-27 01:40:41,144 INFO L445 BasicCegarLoop]: Path program histogram: [18, 8, 6, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 01:40:41,159 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 01:40:41,159 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 01:40:41,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 01:40:41 BasicIcfg [2023-08-27 01:40:41,161 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 01:40:41,161 INFO L158 Benchmark]: Toolchain (without parser) took 836227.90ms. Allocated memory was 354.4MB in the beginning and 7.3GB in the end (delta: 6.9GB). Free memory was 314.0MB in the beginning and 4.8GB in the end (delta: -4.5GB). Peak memory consumption was 5.7GB. Max. memory is 16.0GB. [2023-08-27 01:40:41,161 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 354.4MB. Free memory is still 332.1MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 01:40:41,161 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.19ms. Allocated memory is still 354.4MB. Free memory was 314.0MB in the beginning and 302.2MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-27 01:40:41,161 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.36ms. Allocated memory is still 354.4MB. Free memory was 302.2MB in the beginning and 300.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 01:40:41,162 INFO L158 Benchmark]: Boogie Preprocessor took 33.60ms. Allocated memory is still 354.4MB. Free memory was 300.1MB in the beginning and 298.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 01:40:41,162 INFO L158 Benchmark]: RCFGBuilder took 571.19ms. Allocated memory is still 354.4MB. Free memory was 298.3MB in the beginning and 312.9MB in the end (delta: -14.6MB). Peak memory consumption was 15.8MB. Max. memory is 16.0GB. [2023-08-27 01:40:41,162 INFO L158 Benchmark]: TraceAbstraction took 835328.34ms. Allocated memory was 354.4MB in the beginning and 7.3GB in the end (delta: 6.9GB). Free memory was 312.3MB in the beginning and 4.8GB in the end (delta: -4.5GB). Peak memory consumption was 5.7GB. Max. memory is 16.0GB. [2023-08-27 01:40:41,162 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 354.4MB. Free memory is still 332.1MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 242.19ms. Allocated memory is still 354.4MB. Free memory was 314.0MB in the beginning and 302.2MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 46.36ms. Allocated memory is still 354.4MB. Free memory was 302.2MB in the beginning and 300.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.60ms. Allocated memory is still 354.4MB. Free memory was 300.1MB in the beginning and 298.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 571.19ms. Allocated memory is still 354.4MB. Free memory was 298.3MB in the beginning and 312.9MB in the end (delta: -14.6MB). Peak memory consumption was 15.8MB. Max. memory is 16.0GB. * TraceAbstraction took 835328.34ms. Allocated memory was 354.4MB in the beginning and 7.3GB in the end (delta: 6.9GB). Free memory was 312.3MB in the beginning and 4.8GB in the end (delta: -4.5GB). Peak memory consumption was 5.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 5.0s, 144 PlacesBefore, 33 PlacesAfterwards, 148 TransitionsBefore, 29 TransitionsAfterwards, 1404 CoEnabledTransitionPairs, 7 FixpointIterations, 89 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 14 TrivialYvCompositions, 7 ConcurrentYvCompositions, 8 ChoiceCompositions, 158 TotalNumberOfCompositions, 1888 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1639, independent: 1612, independent conditional: 0, independent unconditional: 1612, dependent: 27, dependent conditional: 0, dependent unconditional: 27, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 800, independent: 787, independent conditional: 0, independent unconditional: 787, dependent: 13, dependent conditional: 0, dependent unconditional: 13, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1639, independent: 825, independent conditional: 0, independent unconditional: 825, dependent: 14, dependent conditional: 0, dependent unconditional: 14, unknown: 800, unknown conditional: 0, unknown unconditional: 800] , Statistics on independence cache: Total cache size (in pairs): 46, Positive cache size: 43, Positive conditional cache size: 0, Positive unconditional cache size: 43, 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: 76]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. - TimeoutResultAtElement [Line: 115]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. - TimeoutResultAtElement [Line: 115]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was analyzing trace of length 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. - TimeoutResultAtElement [Line: 100]: 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 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. - TimeoutResultAtElement [Line: 99]: 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 17 with TraceHistMax 3,while TraceCheckSpWp was constructing backward predicates,while PolyPacSimplificationTermWalker was simplifying a ATOM-1 term,while PolyPacSimplificationTermWalker was simplifying 2 xjuncts wrt. a ∧-34-5-3-5-3-5-4-4-3-6-4-7-3-7-2-4-3-4-2-4-2-2-1 context. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 188 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: 835.2s, OverallIterations: 65, TraceHistogramMax: 5, PathProgramHistogramMax: 18, EmptinessCheckTime: 0.0s, AutomataDifference: 590.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 5.1s, HoareTripleCheckerStatistics: 546 mSolverCounterUnknown, 6772 SdHoareTripleChecker+Valid, 93.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6772 mSDsluCounter, 24 SdHoareTripleChecker+Invalid, 89.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1326 IncrementalHoareTripleChecker+Unchecked, 16 mSDsCounter, 3531 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 48182 IncrementalHoareTripleChecker+Invalid, 53585 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3531 mSolverCounterUnsat, 8 mSDtfsCounter, 48182 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2681 GetRequests, 551 SyntacticMatches, 18 SemanticMatches, 2112 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 29359 ImplicationChecksByTransitivity, 157.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=147450occurred in iteration=63, InterpolantAutomatonStates: 1451, 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: 0.6s SsaConstructionTime, 2.1s SatisfiabilityAnalysisTime, 91.4s InterpolantComputationTime, 1481 NumberOfCodeBlocks, 1454 NumberOfCodeBlocksAsserted, 157 NumberOfCheckSat, 1915 ConstructedInterpolants, 129 QuantifiedInterpolants, 42932 SizeOfPredicates, 519 NumberOfNonLiveVariables, 11165 ConjunctsInSsa, 1558 ConjunctsInUnsatCore, 162 InterpolantComputations, 23 PerfectInterpolantSequences, 295/1167 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