/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 08:56:34,938 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 08:56:35,001 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-27 08:56:35,005 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 08:56:35,005 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 08:56:35,027 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 08:56:35,028 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 08:56:35,029 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 08:56:35,029 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 08:56:35,037 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 08:56:35,037 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 08:56:35,037 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 08:56:35,037 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 08:56:35,039 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 08:56:35,039 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 08:56:35,039 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 08:56:35,039 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 08:56:35,039 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 08:56:35,039 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 08:56:35,040 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 08:56:35,040 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 08:56:35,041 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 08:56:35,041 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 08:56:35,041 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 08:56:35,041 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 08:56:35,042 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 08:56:35,042 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 08:56:35,042 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:56:35,042 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 08:56:35,042 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 08:56:35,043 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 08:56:35,043 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 08:56:35,043 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 08:56:35,043 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 08:56:35,043 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 08:56:35,044 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 08:56:35,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 08:56:35,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 08:56:35,323 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 08:56:35,324 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 08:56:35,325 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 08:56:35,326 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2023-08-27 08:56:36,248 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 08:56:36,442 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 08:56:36,443 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/unroll-cond-2.wvr.c [2023-08-27 08:56:36,450 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e6199c0f/a23154c199914141965915ca598a7108/FLAG1e2aac8a9 [2023-08-27 08:56:36,466 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e6199c0f/a23154c199914141965915ca598a7108 [2023-08-27 08:56:36,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 08:56:36,471 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 08:56:36,472 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 08:56:36,472 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 08:56:36,474 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 08:56:36,475 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:56:36" (1/1) ... [2023-08-27 08:56:36,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14212e29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:56:36, skipping insertion in model container [2023-08-27 08:56:36,476 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 08:56:36" (1/1) ... [2023-08-27 08:56:36,495 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 08:56:36,633 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:56:36,640 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 08:56:36,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 08:56:36,682 INFO L206 MainTranslator]: Completed translation [2023-08-27 08:56:36,682 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:56:36 WrapperNode [2023-08-27 08:56:36,683 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 08:56:36,683 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 08:56:36,683 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 08:56:36,683 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 08:56:36,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:56:36" (1/1) ... [2023-08-27 08:56:36,700 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:56:36" (1/1) ... [2023-08-27 08:56:36,725 INFO L138 Inliner]: procedures = 24, calls = 34, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 149 [2023-08-27 08:56:36,725 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 08:56:36,727 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 08:56:36,727 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 08:56:36,727 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 08:56:36,733 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:56:36" (1/1) ... [2023-08-27 08:56:36,733 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:56:36" (1/1) ... [2023-08-27 08:56:36,744 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:56:36" (1/1) ... [2023-08-27 08:56:36,745 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:56:36" (1/1) ... [2023-08-27 08:56:36,754 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:56:36" (1/1) ... [2023-08-27 08:56:36,756 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:56:36" (1/1) ... [2023-08-27 08:56:36,757 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:56:36" (1/1) ... [2023-08-27 08:56:36,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:56:36" (1/1) ... [2023-08-27 08:56:36,759 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 08:56:36,760 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 08:56:36,760 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 08:56:36,760 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 08:56:36,761 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:56:36" (1/1) ... [2023-08-27 08:56:36,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 08:56:36,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:56:36,823 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-27 08:56:36,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-27 08:56:36,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 08:56:36,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 08:56:36,894 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 08:56:36,894 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 08:56:36,894 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 08:56:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 08:56:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 08:56:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 08:56:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 08:56:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 08:56:36,895 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 08:56:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 08:56:36,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 08:56:36,897 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-27 08:56:36,963 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 08:56:36,972 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 08:56:37,188 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 08:56:37,195 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 08:56:37,195 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 08:56:37,196 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:56:37 BoogieIcfgContainer [2023-08-27 08:56:37,197 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 08:56:37,198 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 08:56:37,198 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 08:56:37,200 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 08:56:37,200 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 08:56:36" (1/3) ... [2023-08-27 08:56:37,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45312769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:56:37, skipping insertion in model container [2023-08-27 08:56:37,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 08:56:36" (2/3) ... [2023-08-27 08:56:37,201 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45312769 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 08:56:37, skipping insertion in model container [2023-08-27 08:56:37,201 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 08:56:37" (3/3) ... [2023-08-27 08:56:37,202 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2023-08-27 08:56:37,214 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 08:56:37,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-27 08:56:37,215 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 08:56:37,297 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 08:56:37,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 172 transitions, 360 flow [2023-08-27 08:56:37,400 INFO L124 PetriNetUnfolderBase]: 15/170 cut-off events. [2023-08-27 08:56:37,401 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:56:37,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 170 events. 15/170 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 215 event pairs, 0 based on Foata normal form. 0/152 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2023-08-27 08:56:37,405 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 172 transitions, 360 flow [2023-08-27 08:56:37,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 153 places, 161 transitions, 334 flow [2023-08-27 08:56:37,415 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 08:56:37,424 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 153 places, 161 transitions, 334 flow [2023-08-27 08:56:37,428 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 153 places, 161 transitions, 334 flow [2023-08-27 08:56:37,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 153 places, 161 transitions, 334 flow [2023-08-27 08:56:37,487 INFO L124 PetriNetUnfolderBase]: 15/161 cut-off events. [2023-08-27 08:56:37,487 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 08:56:37,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 161 events. 15/161 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 211 event pairs, 0 based on Foata normal form. 0/144 useless extension candidates. Maximal degree in co-relation 99. Up to 2 conditions per place. [2023-08-27 08:56:37,491 INFO L119 LiptonReduction]: Number of co-enabled transitions 2692 [2023-08-27 08:56:40,871 INFO L134 LiptonReduction]: Checked pairs total: 2722 [2023-08-27 08:56:40,871 INFO L136 LiptonReduction]: Total number of compositions: 191 [2023-08-27 08:56:40,896 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 08:56:40,903 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;@100b86cf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 08:56:40,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-27 08:56:40,921 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 08:56:40,921 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-27 08:56:40,921 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 08:56:40,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:40,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 08:56:40,922 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:40,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:40,942 INFO L85 PathProgramCache]: Analyzing trace with hash 22318, now seen corresponding path program 1 times [2023-08-27 08:56:40,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:40,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450119603] [2023-08-27 08:56:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:40,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:56:41,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:41,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450119603] [2023-08-27 08:56:41,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450119603] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:56:41,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:56:41,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:56:41,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316258819] [2023-08-27 08:56:41,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:56:41,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:56:41,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:41,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:56:41,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:56:41,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 363 [2023-08-27 08:56:41,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:41,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:41,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 363 [2023-08-27 08:56:41,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:41,211 INFO L124 PetriNetUnfolderBase]: 45/80 cut-off events. [2023-08-27 08:56:41,211 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-27 08:56:41,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 80 events. 45/80 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 183 event pairs, 18 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 120. Up to 74 conditions per place. [2023-08-27 08:56:41,213 INFO L140 encePairwiseOnDemand]: 360/363 looper letters, 14 selfloop transitions, 2 changer transitions 0/18 dead transitions. [2023-08-27 08:56:41,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 18 transitions, 80 flow [2023-08-27 08:56:41,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:56:41,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:56:41,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-27 08:56:41,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4233241505968779 [2023-08-27 08:56:41,230 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-27 08:56:41,230 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-27 08:56:41,233 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:41,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-27 08:56:41,239 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:41,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:41,244 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:41,246 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 50 flow. Second operand 3 states and 461 transitions. [2023-08-27 08:56:41,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 18 transitions, 80 flow [2023-08-27 08:56:41,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 18 transitions, 72 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 08:56:41,248 INFO L231 Difference]: Finished difference. Result has 20 places, 18 transitions, 44 flow [2023-08-27 08:56:41,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=20, PETRI_TRANSITIONS=18} [2023-08-27 08:56:41,252 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2023-08-27 08:56:41,252 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 18 transitions, 44 flow [2023-08-27 08:56:41,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:41,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:41,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 08:56:41,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 08:56:41,253 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:41,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:41,253 INFO L85 PathProgramCache]: Analyzing trace with hash 22317, now seen corresponding path program 1 times [2023-08-27 08:56:41,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:41,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825873110] [2023-08-27 08:56:41,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:41,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:56:41,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:41,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825873110] [2023-08-27 08:56:41,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825873110] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:56:41,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:56:41,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 08:56:41,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121026915] [2023-08-27 08:56:41,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:56:41,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:56:41,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:41,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:56:41,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:56:41,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 363 [2023-08-27 08:56:41,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 18 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:41,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:41,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 363 [2023-08-27 08:56:41,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:41,391 INFO L124 PetriNetUnfolderBase]: 46/82 cut-off events. [2023-08-27 08:56:41,392 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 08:56:41,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 82 events. 46/82 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 184 event pairs, 18 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 152. Up to 78 conditions per place. [2023-08-27 08:56:41,394 INFO L140 encePairwiseOnDemand]: 359/363 looper letters, 15 selfloop transitions, 3 changer transitions 0/20 dead transitions. [2023-08-27 08:56:41,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 20 transitions, 86 flow [2023-08-27 08:56:41,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:56:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:56:41,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-08-27 08:56:41,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251606978879706 [2023-08-27 08:56:41,396 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-08-27 08:56:41,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-08-27 08:56:41,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:41,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-08-27 08:56:41,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:41,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:41,400 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:41,400 INFO L175 Difference]: Start difference. First operand has 20 places, 18 transitions, 44 flow. Second operand 3 states and 463 transitions. [2023-08-27 08:56:41,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 20 transitions, 86 flow [2023-08-27 08:56:41,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 20 transitions, 80 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:56:41,401 INFO L231 Difference]: Finished difference. Result has 21 places, 20 transitions, 59 flow [2023-08-27 08:56:41,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=21, PETRI_TRANSITIONS=20} [2023-08-27 08:56:41,402 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -2 predicate places. [2023-08-27 08:56:41,402 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 20 transitions, 59 flow [2023-08-27 08:56:41,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.66666666666666) internal successors, (446), 3 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:41,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:41,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 08:56:41,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-27 08:56:41,403 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:41,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:41,405 INFO L85 PathProgramCache]: Analyzing trace with hash 693250, now seen corresponding path program 1 times [2023-08-27 08:56:41,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:41,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109748608] [2023-08-27 08:56:41,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:41,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:41,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:56:41,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:41,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109748608] [2023-08-27 08:56:41,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109748608] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:56:41,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133485748] [2023-08-27 08:56:41,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:41,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:41,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:56:41,493 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:56:41,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-27 08:56:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:41,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 08:56:41,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:56:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:56:41,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:56:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:56:41,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133485748] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:56:41,597 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:56:41,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2023-08-27 08:56:41,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146711303] [2023-08-27 08:56:41,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:56:41,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-27 08:56:41,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:41,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-27 08:56:41,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-27 08:56:41,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 363 [2023-08-27 08:56:41,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 59 flow. Second operand has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:41,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:41,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 363 [2023-08-27 08:56:41,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:41,638 INFO L124 PetriNetUnfolderBase]: 49/88 cut-off events. [2023-08-27 08:56:41,638 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 08:56:41,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 194 conditions, 88 events. 49/88 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 204 event pairs, 18 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 152. Up to 81 conditions per place. [2023-08-27 08:56:41,639 INFO L140 encePairwiseOnDemand]: 359/363 looper letters, 15 selfloop transitions, 9 changer transitions 0/26 dead transitions. [2023-08-27 08:56:41,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 26 transitions, 131 flow [2023-08-27 08:56:41,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:56:41,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:56:41,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 915 transitions. [2023-08-27 08:56:41,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4201101928374656 [2023-08-27 08:56:41,641 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 915 transitions. [2023-08-27 08:56:41,641 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 915 transitions. [2023-08-27 08:56:41,642 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:41,642 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 915 transitions. [2023-08-27 08:56:41,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 152.5) internal successors, (915), 6 states have internal predecessors, (915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:41,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 363.0) internal successors, (2541), 7 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:41,646 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 363.0) internal successors, (2541), 7 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:41,647 INFO L175 Difference]: Start difference. First operand has 21 places, 20 transitions, 59 flow. Second operand 6 states and 915 transitions. [2023-08-27 08:56:41,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 26 transitions, 131 flow [2023-08-27 08:56:41,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 126 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 08:56:41,647 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 115 flow [2023-08-27 08:56:41,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=115, PETRI_PLACES=28, PETRI_TRANSITIONS=26} [2023-08-27 08:56:41,648 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 5 predicate places. [2023-08-27 08:56:41,648 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 115 flow [2023-08-27 08:56:41,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 149.0) internal successors, (894), 6 states have internal predecessors, (894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:41,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:41,649 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 08:56:41,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-27 08:56:41,853 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 08:56:41,855 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:41,856 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:41,856 INFO L85 PathProgramCache]: Analyzing trace with hash -820812691, now seen corresponding path program 2 times [2023-08-27 08:56:41,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:41,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928650752] [2023-08-27 08:56:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:41,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:41,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:56:41,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:41,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928650752] [2023-08-27 08:56:41,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928650752] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:56:41,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142462290] [2023-08-27 08:56:41,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:56:41,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:41,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:56:41,950 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:56:41,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-27 08:56:42,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:56:42,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:56:42,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 08:56:42,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:56:42,017 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 08:56:42,017 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:56:42,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142462290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:56:42,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:56:42,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 08:56:42,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72206508] [2023-08-27 08:56:42,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:56:42,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:56:42,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:42,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:56:42,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 08:56:42,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 363 [2023-08-27 08:56:42,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 115 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:42,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 363 [2023-08-27 08:56:42,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:42,049 INFO L124 PetriNetUnfolderBase]: 49/87 cut-off events. [2023-08-27 08:56:42,049 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 08:56:42,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208 conditions, 87 events. 49/87 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 193 event pairs, 18 based on Foata normal form. 1/57 useless extension candidates. Maximal degree in co-relation 178. Up to 83 conditions per place. [2023-08-27 08:56:42,050 INFO L140 encePairwiseOnDemand]: 361/363 looper letters, 22 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2023-08-27 08:56:42,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 151 flow [2023-08-27 08:56:42,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:56:42,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:56:42,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-08-27 08:56:42,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4251606978879706 [2023-08-27 08:56:42,051 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-08-27 08:56:42,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-08-27 08:56:42,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:42,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-08-27 08:56:42,052 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,054 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,054 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,054 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 115 flow. Second operand 3 states and 463 transitions. [2023-08-27 08:56:42,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 151 flow [2023-08-27 08:56:42,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 25 transitions, 114 flow, removed 11 selfloop flow, removed 5 redundant places. [2023-08-27 08:56:42,055 INFO L231 Difference]: Finished difference. Result has 24 places, 25 transitions, 70 flow [2023-08-27 08:56:42,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=24, PETRI_TRANSITIONS=25} [2023-08-27 08:56:42,057 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 1 predicate places. [2023-08-27 08:56:42,057 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 25 transitions, 70 flow [2023-08-27 08:56:42,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:42,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:42,075 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-27 08:56:42,264 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,SelfDestructingSolverStorable3 [2023-08-27 08:56:42,267 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:42,268 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:42,268 INFO L85 PathProgramCache]: Analyzing trace with hash 649524385, now seen corresponding path program 1 times [2023-08-27 08:56:42,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:42,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063519041] [2023-08-27 08:56:42,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:42,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:42,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:56:42,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:42,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063519041] [2023-08-27 08:56:42,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063519041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:56:42,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:56:42,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 08:56:42,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573368518] [2023-08-27 08:56:42,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:56:42,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 08:56:42,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:42,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 08:56:42,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 08:56:42,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 363 [2023-08-27 08:56:42,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 25 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:42,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 363 [2023-08-27 08:56:42,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:42,347 INFO L124 PetriNetUnfolderBase]: 48/86 cut-off events. [2023-08-27 08:56:42,347 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-27 08:56:42,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183 conditions, 86 events. 48/86 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 192 event pairs, 18 based on Foata normal form. 1/57 useless extension candidates. Maximal degree in co-relation 175. Up to 82 conditions per place. [2023-08-27 08:56:42,348 INFO L140 encePairwiseOnDemand]: 360/363 looper letters, 20 selfloop transitions, 2 changer transitions 0/24 dead transitions. [2023-08-27 08:56:42,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 24 transitions, 110 flow [2023-08-27 08:56:42,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 08:56:42,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 08:56:42,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 449 transitions. [2023-08-27 08:56:42,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4123048668503214 [2023-08-27 08:56:42,349 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 449 transitions. [2023-08-27 08:56:42,349 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 449 transitions. [2023-08-27 08:56:42,349 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:42,349 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 449 transitions. [2023-08-27 08:56:42,350 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,352 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 363.0) internal successors, (1452), 4 states have internal predecessors, (1452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,352 INFO L175 Difference]: Start difference. First operand has 24 places, 25 transitions, 70 flow. Second operand 3 states and 449 transitions. [2023-08-27 08:56:42,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 24 transitions, 110 flow [2023-08-27 08:56:42,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 24 transitions, 109 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 08:56:42,353 INFO L231 Difference]: Finished difference. Result has 25 places, 24 transitions, 69 flow [2023-08-27 08:56:42,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=25, PETRI_TRANSITIONS=24} [2023-08-27 08:56:42,355 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 2 predicate places. [2023-08-27 08:56:42,355 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 24 transitions, 69 flow [2023-08-27 08:56:42,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.0) internal successors, (444), 3 states have internal predecessors, (444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:42,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:42,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 08:56:42,359 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:42,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:42,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1874093578, now seen corresponding path program 1 times [2023-08-27 08:56:42,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:42,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062508633] [2023-08-27 08:56:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:42,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:56:42,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:42,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062508633] [2023-08-27 08:56:42,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062508633] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:56:42,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:56:42,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 08:56:42,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103623388] [2023-08-27 08:56:42,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:56:42,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:56:42,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:42,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:56:42,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 08:56:42,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:56:42,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 24 transitions, 69 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:42,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:56:42,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:42,657 INFO L124 PetriNetUnfolderBase]: 75/141 cut-off events. [2023-08-27 08:56:42,657 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 08:56:42,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 301 conditions, 141 events. 75/141 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 379 event pairs, 24 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 292. Up to 83 conditions per place. [2023-08-27 08:56:42,658 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 41 selfloop transitions, 5 changer transitions 0/46 dead transitions. [2023-08-27 08:56:42,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 46 transitions, 210 flow [2023-08-27 08:56:42,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:56:42,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:56:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 730 transitions. [2023-08-27 08:56:42,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022038567493113 [2023-08-27 08:56:42,660 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 730 transitions. [2023-08-27 08:56:42,660 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 730 transitions. [2023-08-27 08:56:42,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:42,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 730 transitions. [2023-08-27 08:56:42,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 363.0) internal successors, (2178), 6 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,665 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 363.0) internal successors, (2178), 6 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,665 INFO L175 Difference]: Start difference. First operand has 25 places, 24 transitions, 69 flow. Second operand 5 states and 730 transitions. [2023-08-27 08:56:42,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 46 transitions, 210 flow [2023-08-27 08:56:42,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 46 transitions, 206 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 08:56:42,667 INFO L231 Difference]: Finished difference. Result has 30 places, 28 transitions, 101 flow [2023-08-27 08:56:42,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=101, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2023-08-27 08:56:42,669 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 7 predicate places. [2023-08-27 08:56:42,669 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 101 flow [2023-08-27 08:56:42,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:42,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:42,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-27 08:56:42,669 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:42,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:42,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1235784468, now seen corresponding path program 2 times [2023-08-27 08:56:42,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:42,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569224948] [2023-08-27 08:56:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:42,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:42,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:42,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:56:42,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:42,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569224948] [2023-08-27 08:56:42,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569224948] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:56:42,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:56:42,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 08:56:42,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933560454] [2023-08-27 08:56:42,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:56:42,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:56:42,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:42,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:56:42,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 08:56:42,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:56:42,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 28 transitions, 101 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:42,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:56:42,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:42,921 INFO L124 PetriNetUnfolderBase]: 112/204 cut-off events. [2023-08-27 08:56:42,921 INFO L125 PetriNetUnfolderBase]: For 115/115 co-relation queries the response was YES. [2023-08-27 08:56:42,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 594 conditions, 204 events. 112/204 cut-off events. For 115/115 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 610 event pairs, 24 based on Foata normal form. 2/167 useless extension candidates. Maximal degree in co-relation 583. Up to 87 conditions per place. [2023-08-27 08:56:42,922 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 46 selfloop transitions, 12 changer transitions 0/58 dead transitions. [2023-08-27 08:56:42,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 58 transitions, 323 flow [2023-08-27 08:56:42,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:56:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:56:42,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 876 transitions. [2023-08-27 08:56:42,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4022038567493113 [2023-08-27 08:56:42,924 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 876 transitions. [2023-08-27 08:56:42,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 876 transitions. [2023-08-27 08:56:42,925 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:42,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 876 transitions. [2023-08-27 08:56:42,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 146.0) internal successors, (876), 6 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,928 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 363.0) internal successors, (2541), 7 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,928 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 363.0) internal successors, (2541), 7 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,928 INFO L175 Difference]: Start difference. First operand has 30 places, 28 transitions, 101 flow. Second operand 6 states and 876 transitions. [2023-08-27 08:56:42,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 58 transitions, 323 flow [2023-08-27 08:56:42,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 58 transitions, 306 flow, removed 5 selfloop flow, removed 1 redundant places. [2023-08-27 08:56:42,930 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 182 flow [2023-08-27 08:56:42,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2023-08-27 08:56:42,930 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 15 predicate places. [2023-08-27 08:56:42,930 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 182 flow [2023-08-27 08:56:42,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:42,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:42,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:42,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-27 08:56:42,931 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:42,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:42,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1157671460, now seen corresponding path program 3 times [2023-08-27 08:56:42,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:42,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193902697] [2023-08-27 08:56:42,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:42,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:42,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:56:43,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:43,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193902697] [2023-08-27 08:56:43,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193902697] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:56:43,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:56:43,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 08:56:43,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714394242] [2023-08-27 08:56:43,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:56:43,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:56:43,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:43,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:56:43,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 08:56:43,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:56:43,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 182 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:43,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:56:43,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:43,125 INFO L124 PetriNetUnfolderBase]: 122/220 cut-off events. [2023-08-27 08:56:43,126 INFO L125 PetriNetUnfolderBase]: For 335/335 co-relation queries the response was YES. [2023-08-27 08:56:43,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 220 events. 122/220 cut-off events. For 335/335 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 691 event pairs, 28 based on Foata normal form. 4/193 useless extension candidates. Maximal degree in co-relation 801. Up to 117 conditions per place. [2023-08-27 08:56:43,127 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 46 selfloop transitions, 14 changer transitions 0/60 dead transitions. [2023-08-27 08:56:43,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 60 transitions, 407 flow [2023-08-27 08:56:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:56:43,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:56:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 731 transitions. [2023-08-27 08:56:43,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027548209366391 [2023-08-27 08:56:43,129 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 731 transitions. [2023-08-27 08:56:43,129 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 731 transitions. [2023-08-27 08:56:43,129 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:43,129 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 731 transitions. [2023-08-27 08:56:43,130 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 363.0) internal successors, (2178), 6 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,132 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 363.0) internal successors, (2178), 6 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,132 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 182 flow. Second operand 5 states and 731 transitions. [2023-08-27 08:56:43,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 60 transitions, 407 flow [2023-08-27 08:56:43,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 60 transitions, 393 flow, removed 7 selfloop flow, removed 0 redundant places. [2023-08-27 08:56:43,134 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 274 flow [2023-08-27 08:56:43,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=274, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2023-08-27 08:56:43,135 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 22 predicate places. [2023-08-27 08:56:43,135 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 274 flow [2023-08-27 08:56:43,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:43,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:43,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 08:56:43,136 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:43,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:43,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1954173590, now seen corresponding path program 4 times [2023-08-27 08:56:43,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:43,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712142911] [2023-08-27 08:56:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:43,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:43,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:56:43,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:43,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712142911] [2023-08-27 08:56:43,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712142911] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:56:43,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:56:43,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 08:56:43,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698786480] [2023-08-27 08:56:43,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:56:43,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:56:43,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:43,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:56:43,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 08:56:43,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:56:43,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 274 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:43,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:56:43,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:43,345 INFO L124 PetriNetUnfolderBase]: 118/216 cut-off events. [2023-08-27 08:56:43,345 INFO L125 PetriNetUnfolderBase]: For 605/605 co-relation queries the response was YES. [2023-08-27 08:56:43,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 890 conditions, 216 events. 118/216 cut-off events. For 605/605 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 677 event pairs, 36 based on Foata normal form. 4/195 useless extension candidates. Maximal degree in co-relation 871. Up to 173 conditions per place. [2023-08-27 08:56:43,346 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 39 selfloop transitions, 18 changer transitions 0/57 dead transitions. [2023-08-27 08:56:43,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 461 flow [2023-08-27 08:56:43,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:56:43,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:56:43,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 725 transitions. [2023-08-27 08:56:43,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39944903581267216 [2023-08-27 08:56:43,348 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 725 transitions. [2023-08-27 08:56:43,348 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 725 transitions. [2023-08-27 08:56:43,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:43,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 725 transitions. [2023-08-27 08:56:43,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,351 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 363.0) internal successors, (2178), 6 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,351 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 363.0) internal successors, (2178), 6 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,351 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 274 flow. Second operand 5 states and 725 transitions. [2023-08-27 08:56:43,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 461 flow [2023-08-27 08:56:43,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 445 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-27 08:56:43,354 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 366 flow [2023-08-27 08:56:43,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=366, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-08-27 08:56:43,355 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 27 predicate places. [2023-08-27 08:56:43,355 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 366 flow [2023-08-27 08:56:43,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:43,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:43,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-27 08:56:43,355 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:43,356 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:43,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1011324760, now seen corresponding path program 5 times [2023-08-27 08:56:43,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:43,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161032969] [2023-08-27 08:56:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:43,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:56:43,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:43,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161032969] [2023-08-27 08:56:43,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161032969] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:56:43,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:56:43,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 08:56:43,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957992524] [2023-08-27 08:56:43,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:56:43,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:56:43,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:43,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:56:43,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-27 08:56:43,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:56:43,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 366 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:43,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:56:43,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:43,518 INFO L124 PetriNetUnfolderBase]: 119/219 cut-off events. [2023-08-27 08:56:43,518 INFO L125 PetriNetUnfolderBase]: For 617/617 co-relation queries the response was YES. [2023-08-27 08:56:43,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 964 conditions, 219 events. 119/219 cut-off events. For 617/617 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 712 event pairs, 24 based on Foata normal form. 2/196 useless extension candidates. Maximal degree in co-relation 943. Up to 119 conditions per place. [2023-08-27 08:56:43,519 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 47 selfloop transitions, 15 changer transitions 0/62 dead transitions. [2023-08-27 08:56:43,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 62 transitions, 534 flow [2023-08-27 08:56:43,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:56:43,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:56:43,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 729 transitions. [2023-08-27 08:56:43,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40165289256198344 [2023-08-27 08:56:43,521 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 729 transitions. [2023-08-27 08:56:43,521 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 729 transitions. [2023-08-27 08:56:43,522 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:43,522 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 729 transitions. [2023-08-27 08:56:43,523 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.8) internal successors, (729), 5 states have internal predecessors, (729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 363.0) internal successors, (2178), 6 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,525 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 363.0) internal successors, (2178), 6 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,525 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 366 flow. Second operand 5 states and 729 transitions. [2023-08-27 08:56:43,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 62 transitions, 534 flow [2023-08-27 08:56:43,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 62 transitions, 491 flow, removed 14 selfloop flow, removed 1 redundant places. [2023-08-27 08:56:43,528 INFO L231 Difference]: Finished difference. Result has 54 places, 49 transitions, 363 flow [2023-08-27 08:56:43,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=363, PETRI_PLACES=54, PETRI_TRANSITIONS=49} [2023-08-27 08:56:43,529 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 31 predicate places. [2023-08-27 08:56:43,529 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 49 transitions, 363 flow [2023-08-27 08:56:43,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:43,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:43,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-27 08:56:43,530 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:43,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:43,530 INFO L85 PathProgramCache]: Analyzing trace with hash -345988346, now seen corresponding path program 6 times [2023-08-27 08:56:43,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:43,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420103520] [2023-08-27 08:56:43,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:43,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:43,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:56:43,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:43,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420103520] [2023-08-27 08:56:43,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420103520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:56:43,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 08:56:43,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-27 08:56:43,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33387470] [2023-08-27 08:56:43,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:56:43,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:56:43,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:43,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:56:43,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-27 08:56:43,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:56:43,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 49 transitions, 363 flow. Second operand has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:43,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:56:43,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:43,752 INFO L124 PetriNetUnfolderBase]: 118/212 cut-off events. [2023-08-27 08:56:43,752 INFO L125 PetriNetUnfolderBase]: For 736/736 co-relation queries the response was YES. [2023-08-27 08:56:43,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 929 conditions, 212 events. 118/212 cut-off events. For 736/736 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 644 event pairs, 35 based on Foata normal form. 2/189 useless extension candidates. Maximal degree in co-relation 907. Up to 166 conditions per place. [2023-08-27 08:56:43,754 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 40 selfloop transitions, 18 changer transitions 0/58 dead transitions. [2023-08-27 08:56:43,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 58 transitions, 503 flow [2023-08-27 08:56:43,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:56:43,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:56:43,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 725 transitions. [2023-08-27 08:56:43,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39944903581267216 [2023-08-27 08:56:43,756 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 725 transitions. [2023-08-27 08:56:43,756 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 725 transitions. [2023-08-27 08:56:43,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:43,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 725 transitions. [2023-08-27 08:56:43,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,760 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 363.0) internal successors, (2178), 6 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,760 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 363.0) internal successors, (2178), 6 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,761 INFO L175 Difference]: Start difference. First operand has 54 places, 49 transitions, 363 flow. Second operand 5 states and 725 transitions. [2023-08-27 08:56:43,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 58 transitions, 503 flow [2023-08-27 08:56:43,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 469 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-27 08:56:43,764 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 369 flow [2023-08-27 08:56:43,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2023-08-27 08:56:43,765 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 33 predicate places. [2023-08-27 08:56:43,765 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 369 flow [2023-08-27 08:56:43,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.0) internal successors, (705), 5 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:43,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:43,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:43,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-27 08:56:43,765 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:43,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:43,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1344288983, now seen corresponding path program 1 times [2023-08-27 08:56:43,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:43,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446810649] [2023-08-27 08:56:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:43,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:44,028 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 08:56:44,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:44,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446810649] [2023-08-27 08:56:44,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446810649] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:56:44,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492572441] [2023-08-27 08:56:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:44,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:44,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:56:44,045 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:56:44,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-27 08:56:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:44,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-27 08:56:44,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:56:44,252 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-08-27 08:56:44,285 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 08:56:44,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:56:44,498 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:56:44,498 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 19 treesize of output 7 [2023-08-27 08:56:44,533 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 08:56:44,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492572441] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:56:44,533 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:56:44,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 10 [2023-08-27 08:56:44,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112564428] [2023-08-27 08:56:44,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:56:44,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 08:56:44,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:44,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 08:56:44,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:56:44,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 363 [2023-08-27 08:56:44,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 369 flow. Second operand has 12 states, 12 states have (on average 113.33333333333333) internal successors, (1360), 12 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:44,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:44,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 363 [2023-08-27 08:56:44,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:45,016 INFO L124 PetriNetUnfolderBase]: 239/423 cut-off events. [2023-08-27 08:56:45,017 INFO L125 PetriNetUnfolderBase]: For 1313/1313 co-relation queries the response was YES. [2023-08-27 08:56:45,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1765 conditions, 423 events. 239/423 cut-off events. For 1313/1313 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1629 event pairs, 10 based on Foata normal form. 1/362 useless extension candidates. Maximal degree in co-relation 1742. Up to 113 conditions per place. [2023-08-27 08:56:45,019 INFO L140 encePairwiseOnDemand]: 353/363 looper letters, 74 selfloop transitions, 53 changer transitions 4/131 dead transitions. [2023-08-27 08:56:45,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 131 transitions, 1026 flow [2023-08-27 08:56:45,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-27 08:56:45,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-27 08:56:45,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1545 transitions. [2023-08-27 08:56:45,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3273998728544183 [2023-08-27 08:56:45,023 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1545 transitions. [2023-08-27 08:56:45,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1545 transitions. [2023-08-27 08:56:45,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:45,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1545 transitions. [2023-08-27 08:56:45,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 118.84615384615384) internal successors, (1545), 13 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:45,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 363.0) internal successors, (5082), 14 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:45,031 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 363.0) internal successors, (5082), 14 states have internal predecessors, (5082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:45,031 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 369 flow. Second operand 13 states and 1545 transitions. [2023-08-27 08:56:45,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 131 transitions, 1026 flow [2023-08-27 08:56:45,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 131 transitions, 964 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-27 08:56:45,036 INFO L231 Difference]: Finished difference. Result has 70 places, 81 transitions, 695 flow [2023-08-27 08:56:45,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=695, PETRI_PLACES=70, PETRI_TRANSITIONS=81} [2023-08-27 08:56:45,037 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 47 predicate places. [2023-08-27 08:56:45,037 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 81 transitions, 695 flow [2023-08-27 08:56:45,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 113.33333333333333) internal successors, (1360), 12 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:45,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:45,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:45,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-27 08:56:45,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:45,253 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:45,253 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:45,253 INFO L85 PathProgramCache]: Analyzing trace with hash 38187597, now seen corresponding path program 1 times [2023-08-27 08:56:45,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:45,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587559050] [2023-08-27 08:56:45,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:45,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:45,396 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 08:56:45,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:45,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587559050] [2023-08-27 08:56:45,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587559050] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:56:45,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399509143] [2023-08-27 08:56:45,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:45,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:45,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:56:45,413 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:56:45,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-27 08:56:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:45,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-27 08:56:45,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:56:45,530 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 08:56:45,560 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:56:45,587 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:56:45,804 INFO L322 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-08-27 08:56:45,805 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 173 treesize of output 115 [2023-08-27 08:56:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:56:45,841 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:56:46,335 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:56:46,336 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 78 [2023-08-27 08:56:46,344 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:56:46,345 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 228 treesize of output 216 [2023-08-27 08:56:46,357 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:56:46,357 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 168 [2023-08-27 08:56:46,370 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:56:46,370 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 81 [2023-08-27 08:56:46,573 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-27 08:56:46,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:56:46,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399509143] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:56:46,729 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:56:46,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 24 [2023-08-27 08:56:46,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377132640] [2023-08-27 08:56:46,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:56:46,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-27 08:56:46,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:46,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-27 08:56:46,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=417, Unknown=4, NotChecked=0, Total=552 [2023-08-27 08:56:46,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 363 [2023-08-27 08:56:46,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 81 transitions, 695 flow. Second operand has 24 states, 24 states have (on average 80.0) internal successors, (1920), 24 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:46,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:46,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 363 [2023-08-27 08:56:46,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:47,962 INFO L124 PetriNetUnfolderBase]: 571/996 cut-off events. [2023-08-27 08:56:47,962 INFO L125 PetriNetUnfolderBase]: For 3092/3092 co-relation queries the response was YES. [2023-08-27 08:56:47,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4486 conditions, 996 events. 571/996 cut-off events. For 3092/3092 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 4801 event pairs, 57 based on Foata normal form. 9/912 useless extension candidates. Maximal degree in co-relation 4457. Up to 313 conditions per place. [2023-08-27 08:56:47,968 INFO L140 encePairwiseOnDemand]: 352/363 looper letters, 110 selfloop transitions, 73 changer transitions 81/264 dead transitions. [2023-08-27 08:56:47,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 264 transitions, 2354 flow [2023-08-27 08:56:47,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 08:56:47,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 08:56:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2453 transitions. [2023-08-27 08:56:47,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2330198537095089 [2023-08-27 08:56:47,973 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2453 transitions. [2023-08-27 08:56:47,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2453 transitions. [2023-08-27 08:56:47,975 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:47,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2453 transitions. [2023-08-27 08:56:47,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 84.58620689655173) internal successors, (2453), 29 states have internal predecessors, (2453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:47,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 363.0) internal successors, (10890), 30 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:47,987 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 363.0) internal successors, (10890), 30 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:47,987 INFO L175 Difference]: Start difference. First operand has 70 places, 81 transitions, 695 flow. Second operand 29 states and 2453 transitions. [2023-08-27 08:56:47,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 264 transitions, 2354 flow [2023-08-27 08:56:47,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 264 transitions, 2140 flow, removed 89 selfloop flow, removed 2 redundant places. [2023-08-27 08:56:48,000 INFO L231 Difference]: Finished difference. Result has 108 places, 114 transitions, 1146 flow [2023-08-27 08:56:48,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1146, PETRI_PLACES=108, PETRI_TRANSITIONS=114} [2023-08-27 08:56:48,001 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 85 predicate places. [2023-08-27 08:56:48,001 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 114 transitions, 1146 flow [2023-08-27 08:56:48,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 80.0) internal successors, (1920), 24 states have internal predecessors, (1920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:48,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:48,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:48,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-27 08:56:48,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:48,206 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:48,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:48,207 INFO L85 PathProgramCache]: Analyzing trace with hash 752442555, now seen corresponding path program 2 times [2023-08-27 08:56:48,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:48,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780875769] [2023-08-27 08:56:48,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:48,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:48,432 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 08:56:48,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:48,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780875769] [2023-08-27 08:56:48,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780875769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:56:48,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325248904] [2023-08-27 08:56:48,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:56:48,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:48,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:56:48,434 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:56:48,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-27 08:56:48,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:56:48,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:56:48,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 08:56:48,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:56:48,597 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 77 [2023-08-27 08:56:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:56:48,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:56:48,815 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:56:48,815 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 19 treesize of output 7 [2023-08-27 08:56:48,837 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2023-08-27 08:56:48,881 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 08:56:48,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325248904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:56:48,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:56:48,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 11 [2023-08-27 08:56:48,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554799730] [2023-08-27 08:56:48,882 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:56:48,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 08:56:48,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:48,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 08:56:48,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-08-27 08:56:48,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 363 [2023-08-27 08:56:48,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 114 transitions, 1146 flow. Second operand has 13 states, 13 states have (on average 113.84615384615384) internal successors, (1480), 13 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:48,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:48,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 363 [2023-08-27 08:56:48,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:49,105 INFO L124 PetriNetUnfolderBase]: 393/679 cut-off events. [2023-08-27 08:56:49,105 INFO L125 PetriNetUnfolderBase]: For 2831/2831 co-relation queries the response was YES. [2023-08-27 08:56:49,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3399 conditions, 679 events. 393/679 cut-off events. For 2831/2831 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2925 event pairs, 78 based on Foata normal form. 1/679 useless extension candidates. Maximal degree in co-relation 3358. Up to 547 conditions per place. [2023-08-27 08:56:49,110 INFO L140 encePairwiseOnDemand]: 356/363 looper letters, 97 selfloop transitions, 35 changer transitions 4/136 dead transitions. [2023-08-27 08:56:49,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 136 transitions, 1497 flow [2023-08-27 08:56:49,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 08:56:49,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 08:56:49,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 943 transitions. [2023-08-27 08:56:49,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3247245179063361 [2023-08-27 08:56:49,112 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 943 transitions. [2023-08-27 08:56:49,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 943 transitions. [2023-08-27 08:56:49,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:49,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 943 transitions. [2023-08-27 08:56:49,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 117.875) internal successors, (943), 8 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:49,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 363.0) internal successors, (3267), 9 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:49,117 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 363.0) internal successors, (3267), 9 states have internal predecessors, (3267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:49,117 INFO L175 Difference]: Start difference. First operand has 108 places, 114 transitions, 1146 flow. Second operand 8 states and 943 transitions. [2023-08-27 08:56:49,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 136 transitions, 1497 flow [2023-08-27 08:56:49,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 136 transitions, 1373 flow, removed 25 selfloop flow, removed 14 redundant places. [2023-08-27 08:56:49,128 INFO L231 Difference]: Finished difference. Result has 95 places, 117 transitions, 1139 flow [2023-08-27 08:56:49,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=1022, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1139, PETRI_PLACES=95, PETRI_TRANSITIONS=117} [2023-08-27 08:56:49,129 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 72 predicate places. [2023-08-27 08:56:49,129 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 117 transitions, 1139 flow [2023-08-27 08:56:49,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 113.84615384615384) internal successors, (1480), 13 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:49,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:49,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:49,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-27 08:56:49,334 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,SelfDestructingSolverStorable13 [2023-08-27 08:56:49,335 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:49,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:49,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1374123167, now seen corresponding path program 3 times [2023-08-27 08:56:49,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:49,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31871143] [2023-08-27 08:56:49,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:49,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:49,530 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 08:56:49,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:49,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31871143] [2023-08-27 08:56:49,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31871143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:56:49,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423458137] [2023-08-27 08:56:49,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:56:49,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:49,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:56:49,550 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:56:49,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-27 08:56:49,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:56:49,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:56:49,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-27 08:56:49,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:56:49,699 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-27 08:56:49,704 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 08:56:49,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:56:49,766 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:56:49,767 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 136 treesize of output 128 [2023-08-27 08:56:49,901 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 08:56:49,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423458137] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:56:49,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:56:49,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 9 [2023-08-27 08:56:49,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691621686] [2023-08-27 08:56:49,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:56:49,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 08:56:49,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:49,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 08:56:49,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-27 08:56:49,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 363 [2023-08-27 08:56:49,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 117 transitions, 1139 flow. Second operand has 11 states, 11 states have (on average 116.45454545454545) internal successors, (1281), 11 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:49,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:49,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 363 [2023-08-27 08:56:49,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:50,079 INFO L124 PetriNetUnfolderBase]: 388/677 cut-off events. [2023-08-27 08:56:50,080 INFO L125 PetriNetUnfolderBase]: For 2808/2820 co-relation queries the response was YES. [2023-08-27 08:56:50,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3309 conditions, 677 events. 388/677 cut-off events. For 2808/2820 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2942 event pairs, 85 based on Foata normal form. 5/681 useless extension candidates. Maximal degree in co-relation 3274. Up to 560 conditions per place. [2023-08-27 08:56:50,085 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 92 selfloop transitions, 28 changer transitions 4/131 dead transitions. [2023-08-27 08:56:50,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 131 transitions, 1432 flow [2023-08-27 08:56:50,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-27 08:56:50,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-27 08:56:50,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 724 transitions. [2023-08-27 08:56:50,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33241505968778695 [2023-08-27 08:56:50,088 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 724 transitions. [2023-08-27 08:56:50,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 724 transitions. [2023-08-27 08:56:50,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:50,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 724 transitions. [2023-08-27 08:56:50,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 120.66666666666667) internal successors, (724), 6 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:50,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 363.0) internal successors, (2541), 7 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:50,091 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 363.0) internal successors, (2541), 7 states have internal predecessors, (2541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:50,092 INFO L175 Difference]: Start difference. First operand has 95 places, 117 transitions, 1139 flow. Second operand 6 states and 724 transitions. [2023-08-27 08:56:50,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 131 transitions, 1432 flow [2023-08-27 08:56:50,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 131 transitions, 1296 flow, removed 5 selfloop flow, removed 5 redundant places. [2023-08-27 08:56:50,099 INFO L231 Difference]: Finished difference. Result has 96 places, 118 transitions, 1077 flow [2023-08-27 08:56:50,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1077, PETRI_PLACES=96, PETRI_TRANSITIONS=118} [2023-08-27 08:56:50,100 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 73 predicate places. [2023-08-27 08:56:50,100 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 118 transitions, 1077 flow [2023-08-27 08:56:50,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 116.45454545454545) internal successors, (1281), 11 states have internal predecessors, (1281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:50,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:50,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:50,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-27 08:56:50,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-27 08:56:50,306 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:50,306 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:50,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2081221511, now seen corresponding path program 4 times [2023-08-27 08:56:50,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:50,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631036036] [2023-08-27 08:56:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:50,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:50,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:50,664 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 08:56:50,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:50,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631036036] [2023-08-27 08:56:50,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631036036] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:56:50,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808442803] [2023-08-27 08:56:50,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:56:50,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:50,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:56:50,665 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:56:50,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-27 08:56:50,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:56:50,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:56:50,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-27 08:56:50,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:56:50,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:56:50,803 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 08:56:50,860 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-08-27 08:56:50,864 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 08:56:50,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:56:51,040 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:56:51,040 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 30 [2023-08-27 08:56:51,043 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 13 treesize of output 7 [2023-08-27 08:56:51,102 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 08:56:51,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808442803] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:56:51,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:56:51,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-27 08:56:51,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528883137] [2023-08-27 08:56:51,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:56:51,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-27 08:56:51,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:51,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-27 08:56:51,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-08-27 08:56:51,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 363 [2023-08-27 08:56:51,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 118 transitions, 1077 flow. Second operand has 21 states, 21 states have (on average 108.9047619047619) internal successors, (2287), 21 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:51,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:51,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 363 [2023-08-27 08:56:51,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:53,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:56:53,958 INFO L124 PetriNetUnfolderBase]: 469/823 cut-off events. [2023-08-27 08:56:53,959 INFO L125 PetriNetUnfolderBase]: For 2410/2410 co-relation queries the response was YES. [2023-08-27 08:56:53,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3802 conditions, 823 events. 469/823 cut-off events. For 2410/2410 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 3842 event pairs, 10 based on Foata normal form. 2/824 useless extension candidates. Maximal degree in co-relation 3766. Up to 205 conditions per place. [2023-08-27 08:56:53,963 INFO L140 encePairwiseOnDemand]: 353/363 looper letters, 87 selfloop transitions, 103 changer transitions 8/198 dead transitions. [2023-08-27 08:56:53,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 198 transitions, 1852 flow [2023-08-27 08:56:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 08:56:53,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 08:56:53,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1831 transitions. [2023-08-27 08:56:53,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3152548209366391 [2023-08-27 08:56:53,966 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1831 transitions. [2023-08-27 08:56:53,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1831 transitions. [2023-08-27 08:56:53,967 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:53,967 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1831 transitions. [2023-08-27 08:56:53,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 114.4375) internal successors, (1831), 16 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:53,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 363.0) internal successors, (6171), 17 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:53,974 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 363.0) internal successors, (6171), 17 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:53,974 INFO L175 Difference]: Start difference. First operand has 96 places, 118 transitions, 1077 flow. Second operand 16 states and 1831 transitions. [2023-08-27 08:56:53,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 198 transitions, 1852 flow [2023-08-27 08:56:53,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 198 transitions, 1794 flow, removed 2 selfloop flow, removed 4 redundant places. [2023-08-27 08:56:53,985 INFO L231 Difference]: Finished difference. Result has 114 places, 140 transitions, 1547 flow [2023-08-27 08:56:53,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1547, PETRI_PLACES=114, PETRI_TRANSITIONS=140} [2023-08-27 08:56:53,985 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 91 predicate places. [2023-08-27 08:56:53,985 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 140 transitions, 1547 flow [2023-08-27 08:56:53,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 108.9047619047619) internal successors, (2287), 21 states have internal predecessors, (2287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:53,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:53,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:53,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-27 08:56:54,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:54,191 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:54,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:54,191 INFO L85 PathProgramCache]: Analyzing trace with hash -459749710, now seen corresponding path program 2 times [2023-08-27 08:56:54,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:54,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489521300] [2023-08-27 08:56:54,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:54,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:54,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:54,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:54,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489521300] [2023-08-27 08:56:54,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489521300] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:56:54,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328954702] [2023-08-27 08:56:54,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:56:54,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:54,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:56:54,318 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:56:54,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-27 08:56:54,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:56:54,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:56:54,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 08:56:54,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:56:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:54,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:56:54,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:54,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328954702] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:56:54,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:56:54,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-27 08:56:54,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231670759] [2023-08-27 08:56:54,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:56:54,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 08:56:54,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:54,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 08:56:54,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-08-27 08:56:54,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:56:54,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 140 transitions, 1547 flow. Second operand has 11 states, 11 states have (on average 140.27272727272728) internal successors, (1543), 11 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:54,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:54,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:56:54,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:55,202 INFO L124 PetriNetUnfolderBase]: 624/1097 cut-off events. [2023-08-27 08:56:55,202 INFO L125 PetriNetUnfolderBase]: For 6150/6150 co-relation queries the response was YES. [2023-08-27 08:56:55,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5837 conditions, 1097 events. 624/1097 cut-off events. For 6150/6150 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5509 event pairs, 82 based on Foata normal form. 28/1124 useless extension candidates. Maximal degree in co-relation 5794. Up to 286 conditions per place. [2023-08-27 08:56:55,208 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 126 selfloop transitions, 118 changer transitions 8/252 dead transitions. [2023-08-27 08:56:55,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 252 transitions, 2879 flow [2023-08-27 08:56:55,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 08:56:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 08:56:55,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2464 transitions. [2023-08-27 08:56:55,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39928698752228164 [2023-08-27 08:56:55,223 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2464 transitions. [2023-08-27 08:56:55,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2464 transitions. [2023-08-27 08:56:55,223 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:55,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2464 transitions. [2023-08-27 08:56:55,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 144.94117647058823) internal successors, (2464), 17 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:55,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 363.0) internal successors, (6534), 18 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:55,230 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 363.0) internal successors, (6534), 18 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:55,230 INFO L175 Difference]: Start difference. First operand has 114 places, 140 transitions, 1547 flow. Second operand 17 states and 2464 transitions. [2023-08-27 08:56:55,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 252 transitions, 2879 flow [2023-08-27 08:56:55,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 252 transitions, 2784 flow, removed 34 selfloop flow, removed 2 redundant places. [2023-08-27 08:56:55,274 INFO L231 Difference]: Finished difference. Result has 134 places, 184 transitions, 2356 flow [2023-08-27 08:56:55,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2356, PETRI_PLACES=134, PETRI_TRANSITIONS=184} [2023-08-27 08:56:55,275 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 111 predicate places. [2023-08-27 08:56:55,275 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 184 transitions, 2356 flow [2023-08-27 08:56:55,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 140.27272727272728) internal successors, (1543), 11 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:55,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:55,276 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:55,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-27 08:56:55,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-27 08:56:55,482 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:55,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:55,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1467149780, now seen corresponding path program 3 times [2023-08-27 08:56:55,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:55,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058780084] [2023-08-27 08:56:55,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:55,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:55,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:55,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:55,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058780084] [2023-08-27 08:56:55,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058780084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:56:55,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873425170] [2023-08-27 08:56:55,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:56:55,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:55,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:56:55,721 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:56:55,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-27 08:56:55,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:56:55,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:56:55,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 08:56:55,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:56:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:55,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:56:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:56,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873425170] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:56:56,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:56:56,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 08:56:56,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100607349] [2023-08-27 08:56:56,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:56:56,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 08:56:56,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:56,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 08:56:56,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:56:56,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:56:56,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 184 transitions, 2356 flow. Second operand has 12 states, 12 states have (on average 140.33333333333334) internal successors, (1684), 12 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:56,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:56,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:56:56,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:56,709 INFO L124 PetriNetUnfolderBase]: 698/1283 cut-off events. [2023-08-27 08:56:56,709 INFO L125 PetriNetUnfolderBase]: For 8331/8331 co-relation queries the response was YES. [2023-08-27 08:56:56,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7477 conditions, 1283 events. 698/1283 cut-off events. For 8331/8331 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 7037 event pairs, 113 based on Foata normal form. 32/1314 useless extension candidates. Maximal degree in co-relation 7428. Up to 436 conditions per place. [2023-08-27 08:56:56,719 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 162 selfloop transitions, 126 changer transitions 1/289 dead transitions. [2023-08-27 08:56:56,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 289 transitions, 3634 flow [2023-08-27 08:56:56,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 08:56:56,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 08:56:56,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2758 transitions. [2023-08-27 08:56:56,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3998840075395099 [2023-08-27 08:56:56,722 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2758 transitions. [2023-08-27 08:56:56,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2758 transitions. [2023-08-27 08:56:56,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:56,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2758 transitions. [2023-08-27 08:56:56,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 145.1578947368421) internal successors, (2758), 19 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:56,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 363.0) internal successors, (7260), 20 states have internal predecessors, (7260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:56,730 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 363.0) internal successors, (7260), 20 states have internal predecessors, (7260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:56,730 INFO L175 Difference]: Start difference. First operand has 134 places, 184 transitions, 2356 flow. Second operand 19 states and 2758 transitions. [2023-08-27 08:56:56,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 289 transitions, 3634 flow [2023-08-27 08:56:56,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 289 transitions, 3400 flow, removed 76 selfloop flow, removed 5 redundant places. [2023-08-27 08:56:56,796 INFO L231 Difference]: Finished difference. Result has 154 places, 215 transitions, 2886 flow [2023-08-27 08:56:56,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=2166, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2886, PETRI_PLACES=154, PETRI_TRANSITIONS=215} [2023-08-27 08:56:56,796 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 131 predicate places. [2023-08-27 08:56:56,796 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 215 transitions, 2886 flow [2023-08-27 08:56:56,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 140.33333333333334) internal successors, (1684), 12 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:56,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:56,797 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:56,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-27 08:56:57,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-27 08:56:57,002 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:57,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:57,002 INFO L85 PathProgramCache]: Analyzing trace with hash -658821296, now seen corresponding path program 4 times [2023-08-27 08:56:57,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:57,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135765400] [2023-08-27 08:56:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:57,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:57,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:57,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:57,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135765400] [2023-08-27 08:56:57,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135765400] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:56:57,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242553604] [2023-08-27 08:56:57,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:56:57,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:57,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:56:57,133 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:56:57,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-27 08:56:57,232 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:56:57,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:56:57,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 08:56:57,233 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:56:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:57,300 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:56:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:57,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242553604] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:56:57,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:56:57,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 08:56:57,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516556549] [2023-08-27 08:56:57,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:56:57,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 08:56:57,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:57,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 08:56:57,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:56:57,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:56:57,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 215 transitions, 2886 flow. Second operand has 12 states, 12 states have (on average 140.0) internal successors, (1680), 12 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:57,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:57,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:56:57,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:58,005 INFO L124 PetriNetUnfolderBase]: 697/1256 cut-off events. [2023-08-27 08:56:58,005 INFO L125 PetriNetUnfolderBase]: For 9597/9597 co-relation queries the response was YES. [2023-08-27 08:56:58,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7884 conditions, 1256 events. 697/1256 cut-off events. For 9597/9597 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 6721 event pairs, 111 based on Foata normal form. 16/1271 useless extension candidates. Maximal degree in co-relation 7828. Up to 442 conditions per place. [2023-08-27 08:56:58,017 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 144 selfloop transitions, 125 changer transitions 1/270 dead transitions. [2023-08-27 08:56:58,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 270 transitions, 3706 flow [2023-08-27 08:56:58,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 08:56:58,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 08:56:58,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2322 transitions. [2023-08-27 08:56:58,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39979338842975204 [2023-08-27 08:56:58,020 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2322 transitions. [2023-08-27 08:56:58,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2322 transitions. [2023-08-27 08:56:58,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:58,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2322 transitions. [2023-08-27 08:56:58,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 145.125) internal successors, (2322), 16 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:58,025 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 363.0) internal successors, (6171), 17 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:58,026 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 363.0) internal successors, (6171), 17 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:58,026 INFO L175 Difference]: Start difference. First operand has 154 places, 215 transitions, 2886 flow. Second operand 16 states and 2322 transitions. [2023-08-27 08:56:58,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 270 transitions, 3706 flow [2023-08-27 08:56:58,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 270 transitions, 3570 flow, removed 33 selfloop flow, removed 5 redundant places. [2023-08-27 08:56:58,064 INFO L231 Difference]: Finished difference. Result has 165 places, 217 transitions, 3120 flow [2023-08-27 08:56:58,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=2685, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=3120, PETRI_PLACES=165, PETRI_TRANSITIONS=217} [2023-08-27 08:56:58,064 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 142 predicate places. [2023-08-27 08:56:58,064 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 217 transitions, 3120 flow [2023-08-27 08:56:58,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 140.0) internal successors, (1680), 12 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:58,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:58,065 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:58,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-27 08:56:58,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:58,270 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:58,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:58,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1341612792, now seen corresponding path program 5 times [2023-08-27 08:56:58,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:58,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562964382] [2023-08-27 08:56:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:58,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:58,420 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:58,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:58,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562964382] [2023-08-27 08:56:58,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562964382] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:56:58,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613679823] [2023-08-27 08:56:58,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:56:58,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:58,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:56:58,421 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:56:58,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-27 08:56:58,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:56:58,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:56:58,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 08:56:58,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:56:58,577 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:58,577 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:56:58,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:58,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613679823] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:56:58,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:56:58,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-27 08:56:58,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50888130] [2023-08-27 08:56:58,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:56:58,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 08:56:58,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:58,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 08:56:58,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2023-08-27 08:56:58,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:56:58,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 217 transitions, 3120 flow. Second operand has 13 states, 13 states have (on average 139.92307692307693) internal successors, (1819), 13 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:58,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:58,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:56:58,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:56:59,262 INFO L124 PetriNetUnfolderBase]: 939/1730 cut-off events. [2023-08-27 08:56:59,263 INFO L125 PetriNetUnfolderBase]: For 13456/13456 co-relation queries the response was YES. [2023-08-27 08:56:59,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10988 conditions, 1730 events. 939/1730 cut-off events. For 13456/13456 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9979 event pairs, 29 based on Foata normal form. 6/1735 useless extension candidates. Maximal degree in co-relation 10930. Up to 347 conditions per place. [2023-08-27 08:56:59,276 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 197 selfloop transitions, 154 changer transitions 0/351 dead transitions. [2023-08-27 08:56:59,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 351 transitions, 5106 flow [2023-08-27 08:56:59,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 08:56:59,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 08:56:59,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2467 transitions. [2023-08-27 08:56:59,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39977313239345325 [2023-08-27 08:56:59,279 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2467 transitions. [2023-08-27 08:56:59,279 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2467 transitions. [2023-08-27 08:56:59,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:56:59,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2467 transitions. [2023-08-27 08:56:59,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 145.11764705882354) internal successors, (2467), 17 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:59,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 363.0) internal successors, (6534), 18 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:59,285 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 363.0) internal successors, (6534), 18 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:59,285 INFO L175 Difference]: Start difference. First operand has 165 places, 217 transitions, 3120 flow. Second operand 17 states and 2467 transitions. [2023-08-27 08:56:59,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 351 transitions, 5106 flow [2023-08-27 08:56:59,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 351 transitions, 4956 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-08-27 08:56:59,344 INFO L231 Difference]: Finished difference. Result has 177 places, 266 transitions, 4002 flow [2023-08-27 08:56:59,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=3001, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=4002, PETRI_PLACES=177, PETRI_TRANSITIONS=266} [2023-08-27 08:56:59,345 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 154 predicate places. [2023-08-27 08:56:59,345 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 266 transitions, 4002 flow [2023-08-27 08:56:59,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 139.92307692307693) internal successors, (1819), 13 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:59,345 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:56:59,345 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:56:59,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-27 08:56:59,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:59,552 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:56:59,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:56:59,553 INFO L85 PathProgramCache]: Analyzing trace with hash 804695864, now seen corresponding path program 6 times [2023-08-27 08:56:59,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:56:59,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003333889] [2023-08-27 08:56:59,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:56:59,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:56:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:56:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:59,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:56:59,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003333889] [2023-08-27 08:56:59,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003333889] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:56:59,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331155382] [2023-08-27 08:56:59,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:56:59,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:56:59,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:56:59,681 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:56:59,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-27 08:56:59,783 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 08:56:59,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:56:59,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 08:56:59,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:56:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:59,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:56:59,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:56:59,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331155382] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:56:59,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:56:59,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-27 08:56:59,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660438902] [2023-08-27 08:56:59,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:56:59,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 08:56:59,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:56:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 08:56:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-08-27 08:56:59,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:56:59,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 266 transitions, 4002 flow. Second operand has 11 states, 11 states have (on average 140.27272727272728) internal successors, (1543), 11 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:56:59,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:56:59,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:56:59,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:57:00,536 INFO L124 PetriNetUnfolderBase]: 962/1788 cut-off events. [2023-08-27 08:57:00,536 INFO L125 PetriNetUnfolderBase]: For 17777/17777 co-relation queries the response was YES. [2023-08-27 08:57:00,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12017 conditions, 1788 events. 962/1788 cut-off events. For 17777/17777 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 10525 event pairs, 105 based on Foata normal form. 24/1811 useless extension candidates. Maximal degree in co-relation 11955. Up to 626 conditions per place. [2023-08-27 08:57:00,557 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 185 selfloop transitions, 153 changer transitions 4/342 dead transitions. [2023-08-27 08:57:00,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 342 transitions, 5309 flow [2023-08-27 08:57:00,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 08:57:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 08:57:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2307 transitions. [2023-08-27 08:57:00,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3972107438016529 [2023-08-27 08:57:00,574 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2307 transitions. [2023-08-27 08:57:00,574 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2307 transitions. [2023-08-27 08:57:00,575 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:57:00,575 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2307 transitions. [2023-08-27 08:57:00,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 144.1875) internal successors, (2307), 16 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:00,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 363.0) internal successors, (6171), 17 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:00,601 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 363.0) internal successors, (6171), 17 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:00,601 INFO L175 Difference]: Start difference. First operand has 177 places, 266 transitions, 4002 flow. Second operand 16 states and 2307 transitions. [2023-08-27 08:57:00,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 342 transitions, 5309 flow [2023-08-27 08:57:00,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 342 transitions, 5027 flow, removed 83 selfloop flow, removed 4 redundant places. [2023-08-27 08:57:00,710 INFO L231 Difference]: Finished difference. Result has 193 places, 285 transitions, 4420 flow [2023-08-27 08:57:00,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=3752, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=4420, PETRI_PLACES=193, PETRI_TRANSITIONS=285} [2023-08-27 08:57:00,710 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 170 predicate places. [2023-08-27 08:57:00,710 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 285 transitions, 4420 flow [2023-08-27 08:57:00,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 140.27272727272728) internal successors, (1543), 11 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:00,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:57:00,711 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:57:00,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-27 08:57:00,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-27 08:57:00,916 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:57:00,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:57:00,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1563371942, now seen corresponding path program 7 times [2023-08-27 08:57:00,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:57:00,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270722905] [2023-08-27 08:57:00,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:00,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:57:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:01,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:57:01,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270722905] [2023-08-27 08:57:01,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270722905] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:57:01,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107225179] [2023-08-27 08:57:01,087 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:57:01,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:01,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:57:01,087 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:57:01,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-27 08:57:01,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:01,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 08:57:01,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:57:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:01,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:57:01,344 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:01,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107225179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:57:01,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:57:01,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 08:57:01,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841780985] [2023-08-27 08:57:01,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:57:01,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 08:57:01,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:57:01,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 08:57:01,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:57:01,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:57:01,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 285 transitions, 4420 flow. Second operand has 12 states, 12 states have (on average 140.33333333333334) internal successors, (1684), 12 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:01,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:57:01,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:57:01,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:57:01,973 INFO L124 PetriNetUnfolderBase]: 1065/2011 cut-off events. [2023-08-27 08:57:01,974 INFO L125 PetriNetUnfolderBase]: For 21442/21442 co-relation queries the response was YES. [2023-08-27 08:57:01,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13858 conditions, 2011 events. 1065/2011 cut-off events. For 21442/21442 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 12454 event pairs, 187 based on Foata normal form. 28/2038 useless extension candidates. Maximal degree in co-relation 13791. Up to 1094 conditions per place. [2023-08-27 08:57:01,987 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 221 selfloop transitions, 160 changer transitions 2/383 dead transitions. [2023-08-27 08:57:01,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 383 transitions, 6069 flow [2023-08-27 08:57:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 08:57:01,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 08:57:01,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2315 transitions. [2023-08-27 08:57:01,990 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39858815426997246 [2023-08-27 08:57:01,990 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2315 transitions. [2023-08-27 08:57:01,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2315 transitions. [2023-08-27 08:57:01,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:57:01,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2315 transitions. [2023-08-27 08:57:01,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 144.6875) internal successors, (2315), 16 states have internal predecessors, (2315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:01,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 363.0) internal successors, (6171), 17 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:01,995 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 363.0) internal successors, (6171), 17 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:01,995 INFO L175 Difference]: Start difference. First operand has 193 places, 285 transitions, 4420 flow. Second operand 16 states and 2315 transitions. [2023-08-27 08:57:01,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 383 transitions, 6069 flow [2023-08-27 08:57:02,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 383 transitions, 5975 flow, removed 42 selfloop flow, removed 2 redundant places. [2023-08-27 08:57:02,091 INFO L231 Difference]: Finished difference. Result has 213 places, 321 transitions, 5364 flow [2023-08-27 08:57:02,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=4305, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=5364, PETRI_PLACES=213, PETRI_TRANSITIONS=321} [2023-08-27 08:57:02,091 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 190 predicate places. [2023-08-27 08:57:02,091 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 321 transitions, 5364 flow [2023-08-27 08:57:02,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 140.33333333333334) internal successors, (1684), 12 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:02,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:57:02,092 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:57:02,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-27 08:57:02,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-27 08:57:02,297 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:57:02,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:57:02,297 INFO L85 PathProgramCache]: Analyzing trace with hash -2063558382, now seen corresponding path program 8 times [2023-08-27 08:57:02,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:57:02,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225430205] [2023-08-27 08:57:02,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:02,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:57:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:02,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:57:02,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225430205] [2023-08-27 08:57:02,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225430205] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:57:02,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925270473] [2023-08-27 08:57:02,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:57:02,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:02,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:57:02,433 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:57:02,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-27 08:57:02,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:57:02,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:57:02,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 08:57:02,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:57:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:02,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:57:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:02,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925270473] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:57:02,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:57:02,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-27 08:57:02,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44993629] [2023-08-27 08:57:02,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:57:02,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 08:57:02,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:57:02,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 08:57:02,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-08-27 08:57:02,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:57:02,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 321 transitions, 5364 flow. Second operand has 13 states, 13 states have (on average 139.92307692307693) internal successors, (1819), 13 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:02,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:57:02,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:57:02,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:57:03,562 INFO L124 PetriNetUnfolderBase]: 1211/2261 cut-off events. [2023-08-27 08:57:03,562 INFO L125 PetriNetUnfolderBase]: For 31266/31266 co-relation queries the response was YES. [2023-08-27 08:57:03,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16843 conditions, 2261 events. 1211/2261 cut-off events. For 31266/31266 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14080 event pairs, 55 based on Foata normal form. 18/2278 useless extension candidates. Maximal degree in co-relation 16768. Up to 642 conditions per place. [2023-08-27 08:57:03,579 INFO L140 encePairwiseOnDemand]: 356/363 looper letters, 231 selfloop transitions, 227 changer transitions 0/458 dead transitions. [2023-08-27 08:57:03,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 458 transitions, 7751 flow [2023-08-27 08:57:03,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 08:57:03,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 08:57:03,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 2898 transitions. [2023-08-27 08:57:03,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39917355371900826 [2023-08-27 08:57:03,583 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 2898 transitions. [2023-08-27 08:57:03,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 2898 transitions. [2023-08-27 08:57:03,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:57:03,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 2898 transitions. [2023-08-27 08:57:03,586 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 144.9) internal successors, (2898), 20 states have internal predecessors, (2898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:03,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 363.0) internal successors, (7623), 21 states have internal predecessors, (7623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:03,589 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 363.0) internal successors, (7623), 21 states have internal predecessors, (7623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:03,589 INFO L175 Difference]: Start difference. First operand has 213 places, 321 transitions, 5364 flow. Second operand 20 states and 2898 transitions. [2023-08-27 08:57:03,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 458 transitions, 7751 flow [2023-08-27 08:57:03,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 458 transitions, 7526 flow, removed 73 selfloop flow, removed 6 redundant places. [2023-08-27 08:57:03,732 INFO L231 Difference]: Finished difference. Result has 234 places, 362 transitions, 6494 flow [2023-08-27 08:57:03,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=5191, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6494, PETRI_PLACES=234, PETRI_TRANSITIONS=362} [2023-08-27 08:57:03,733 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 211 predicate places. [2023-08-27 08:57:03,733 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 362 transitions, 6494 flow [2023-08-27 08:57:03,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 139.92307692307693) internal successors, (1819), 13 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:03,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:57:03,733 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:57:03,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-27 08:57:03,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:03,938 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:57:03,938 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:57:03,938 INFO L85 PathProgramCache]: Analyzing trace with hash 605624278, now seen corresponding path program 9 times [2023-08-27 08:57:03,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:57:03,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323729485] [2023-08-27 08:57:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:03,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:57:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:04,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:57:04,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323729485] [2023-08-27 08:57:04,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323729485] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:57:04,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939553295] [2023-08-27 08:57:04,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:57:04,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:04,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:57:04,096 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:57:04,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-27 08:57:04,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:57:04,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:57:04,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 08:57:04,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:57:04,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:04,277 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:57:04,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:04,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939553295] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:57:04,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:57:04,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-27 08:57:04,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844224356] [2023-08-27 08:57:04,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:57:04,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 08:57:04,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:57:04,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 08:57:04,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:57:04,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:57:04,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 362 transitions, 6494 flow. Second operand has 12 states, 12 states have (on average 140.0) internal successors, (1680), 12 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:04,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:57:04,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:57:04,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:57:05,092 INFO L124 PetriNetUnfolderBase]: 1218/2244 cut-off events. [2023-08-27 08:57:05,092 INFO L125 PetriNetUnfolderBase]: For 40403/40403 co-relation queries the response was YES. [2023-08-27 08:57:05,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18424 conditions, 2244 events. 1218/2244 cut-off events. For 40403/40403 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 13701 event pairs, 237 based on Foata normal form. 22/2265 useless extension candidates. Maximal degree in co-relation 18343. Up to 1334 conditions per place. [2023-08-27 08:57:05,110 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 252 selfloop transitions, 164 changer transitions 2/418 dead transitions. [2023-08-27 08:57:05,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 418 transitions, 7843 flow [2023-08-27 08:57:05,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-27 08:57:05,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-27 08:57:05,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2029 transitions. [2023-08-27 08:57:05,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39925226288862653 [2023-08-27 08:57:05,113 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2029 transitions. [2023-08-27 08:57:05,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2029 transitions. [2023-08-27 08:57:05,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:57:05,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2029 transitions. [2023-08-27 08:57:05,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 144.92857142857142) internal successors, (2029), 14 states have internal predecessors, (2029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:05,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 363.0) internal successors, (5445), 15 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:05,117 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 363.0) internal successors, (5445), 15 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:05,117 INFO L175 Difference]: Start difference. First operand has 234 places, 362 transitions, 6494 flow. Second operand 14 states and 2029 transitions. [2023-08-27 08:57:05,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 418 transitions, 7843 flow [2023-08-27 08:57:05,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 418 transitions, 7493 flow, removed 62 selfloop flow, removed 11 redundant places. [2023-08-27 08:57:05,272 INFO L231 Difference]: Finished difference. Result has 237 places, 368 transitions, 6686 flow [2023-08-27 08:57:05,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=6100, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6686, PETRI_PLACES=237, PETRI_TRANSITIONS=368} [2023-08-27 08:57:05,272 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 214 predicate places. [2023-08-27 08:57:05,272 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 368 transitions, 6686 flow [2023-08-27 08:57:05,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 140.0) internal successors, (1680), 12 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:05,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:57:05,273 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:57:05,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-27 08:57:05,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:05,477 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:57:05,478 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:57:05,478 INFO L85 PathProgramCache]: Analyzing trace with hash 236603554, now seen corresponding path program 10 times [2023-08-27 08:57:05,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:57:05,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25582564] [2023-08-27 08:57:05,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:05,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:57:05,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:05,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:57:05,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25582564] [2023-08-27 08:57:05,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25582564] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:57:05,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149955600] [2023-08-27 08:57:05,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:57:05,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:05,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:57:05,619 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:57:05,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-27 08:57:05,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:57:05,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:57:05,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 08:57:05,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:57:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:05,766 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:57:05,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:05,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149955600] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:57:05,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:57:05,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-27 08:57:05,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327789077] [2023-08-27 08:57:05,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:57:05,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 08:57:05,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:57:05,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 08:57:05,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-08-27 08:57:05,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:57:05,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 368 transitions, 6686 flow. Second operand has 13 states, 13 states have (on average 139.92307692307693) internal successors, (1819), 13 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:05,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:57:05,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:57:05,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:57:06,593 INFO L124 PetriNetUnfolderBase]: 1230/2262 cut-off events. [2023-08-27 08:57:06,593 INFO L125 PetriNetUnfolderBase]: For 40523/40523 co-relation queries the response was YES. [2023-08-27 08:57:06,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18640 conditions, 2262 events. 1230/2262 cut-off events. For 40523/40523 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 13772 event pairs, 65 based on Foata normal form. 12/2273 useless extension candidates. Maximal degree in co-relation 18562. Up to 722 conditions per place. [2023-08-27 08:57:06,611 INFO L140 encePairwiseOnDemand]: 356/363 looper letters, 207 selfloop transitions, 235 changer transitions 0/442 dead transitions. [2023-08-27 08:57:06,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 442 transitions, 8227 flow [2023-08-27 08:57:06,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 08:57:06,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 08:57:06,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2595 transitions. [2023-08-27 08:57:06,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3971533516988062 [2023-08-27 08:57:06,615 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2595 transitions. [2023-08-27 08:57:06,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2595 transitions. [2023-08-27 08:57:06,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:57:06,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2595 transitions. [2023-08-27 08:57:06,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 144.16666666666666) internal successors, (2595), 18 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:06,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 363.0) internal successors, (6897), 19 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:06,621 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 363.0) internal successors, (6897), 19 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:06,621 INFO L175 Difference]: Start difference. First operand has 237 places, 368 transitions, 6686 flow. Second operand 18 states and 2595 transitions. [2023-08-27 08:57:06,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 442 transitions, 8227 flow [2023-08-27 08:57:06,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 442 transitions, 8010 flow, removed 9 selfloop flow, removed 8 redundant places. [2023-08-27 08:57:06,768 INFO L231 Difference]: Finished difference. Result has 250 places, 376 transitions, 7219 flow [2023-08-27 08:57:06,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=6408, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=7219, PETRI_PLACES=250, PETRI_TRANSITIONS=376} [2023-08-27 08:57:06,768 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 227 predicate places. [2023-08-27 08:57:06,768 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 376 transitions, 7219 flow [2023-08-27 08:57:06,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 139.92307692307693) internal successors, (1819), 13 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:06,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:57:06,769 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:57:06,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-27 08:57:06,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-27 08:57:06,990 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:57:06,990 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:57:06,990 INFO L85 PathProgramCache]: Analyzing trace with hash 270945072, now seen corresponding path program 5 times [2023-08-27 08:57:06,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:57:06,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101748026] [2023-08-27 08:57:06,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:06,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:57:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:07,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:57:07,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:57:07,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101748026] [2023-08-27 08:57:07,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101748026] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:57:07,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992124742] [2023-08-27 08:57:07,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:57:07,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:07,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:57:07,195 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:57:07,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-27 08:57:07,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 08:57:07,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:57:07,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 08:57:07,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:57:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:57:07,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 08:57:07,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992124742] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 08:57:07,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 08:57:07,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-08-27 08:57:07,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206334675] [2023-08-27 08:57:07,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 08:57:07,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 08:57:07,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:57:07,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 08:57:07,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-08-27 08:57:07,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:57:07,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 376 transitions, 7219 flow. Second operand has 5 states, 5 states have (on average 141.4) internal successors, (707), 5 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:07,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:57:07,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:57:07,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:57:07,730 INFO L124 PetriNetUnfolderBase]: 1248/2292 cut-off events. [2023-08-27 08:57:07,730 INFO L125 PetriNetUnfolderBase]: For 47422/47422 co-relation queries the response was YES. [2023-08-27 08:57:07,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19749 conditions, 2292 events. 1248/2292 cut-off events. For 47422/47422 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 13881 event pairs, 261 based on Foata normal form. 10/2301 useless extension candidates. Maximal degree in co-relation 19668. Up to 1543 conditions per place. [2023-08-27 08:57:07,747 INFO L140 encePairwiseOnDemand]: 359/363 looper letters, 331 selfloop transitions, 54 changer transitions 8/393 dead transitions. [2023-08-27 08:57:07,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 393 transitions, 8169 flow [2023-08-27 08:57:07,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 08:57:07,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 08:57:07,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 733 transitions. [2023-08-27 08:57:07,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4038567493112948 [2023-08-27 08:57:07,757 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 733 transitions. [2023-08-27 08:57:07,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 733 transitions. [2023-08-27 08:57:07,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:57:07,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 733 transitions. [2023-08-27 08:57:07,758 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 146.6) internal successors, (733), 5 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:07,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 363.0) internal successors, (2178), 6 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:07,769 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 363.0) internal successors, (2178), 6 states have internal predecessors, (2178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:07,769 INFO L175 Difference]: Start difference. First operand has 250 places, 376 transitions, 7219 flow. Second operand 5 states and 733 transitions. [2023-08-27 08:57:07,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 393 transitions, 8169 flow [2023-08-27 08:57:07,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 393 transitions, 7741 flow, removed 21 selfloop flow, removed 11 redundant places. [2023-08-27 08:57:07,996 INFO L231 Difference]: Finished difference. Result has 245 places, 368 transitions, 6774 flow [2023-08-27 08:57:07,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6774, PETRI_PLACES=245, PETRI_TRANSITIONS=368} [2023-08-27 08:57:07,997 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 222 predicate places. [2023-08-27 08:57:07,997 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 368 transitions, 6774 flow [2023-08-27 08:57:07,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.4) internal successors, (707), 5 states have internal predecessors, (707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:07,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:57:07,998 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:57:08,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-27 08:57:08,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 08:57:08,202 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:57:08,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:57:08,206 INFO L85 PathProgramCache]: Analyzing trace with hash -803608506, now seen corresponding path program 6 times [2023-08-27 08:57:08,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:57:08,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252787212] [2023-08-27 08:57:08,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:08,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:57:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:08,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:57:08,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:57:08,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252787212] [2023-08-27 08:57:08,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252787212] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:57:08,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116067312] [2023-08-27 08:57:08,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:57:08,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:08,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:57:08,402 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:57:08,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-27 08:57:08,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 08:57:08,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:57:08,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 08:57:08,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:57:08,521 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 08:57:08,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:57:08,578 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:57:08,718 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:57:08,721 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:57:08,721 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 80 [2023-08-27 08:57:08,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:57:08,738 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:57:09,172 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:57:09,172 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 55 treesize of output 44 [2023-08-27 08:57:09,179 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:57:09,179 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 94 treesize of output 81 [2023-08-27 08:57:09,186 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 08:57:09,186 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 78 treesize of output 54 [2023-08-27 08:57:09,192 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 08:57:09,193 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 32 treesize of output 20 [2023-08-27 08:57:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:57:09,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116067312] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:57:09,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:57:09,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2023-08-27 08:57:09,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266974642] [2023-08-27 08:57:09,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:57:09,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:57:09,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:57:09,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:57:09,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=308, Unknown=4, NotChecked=0, Total=380 [2023-08-27 08:57:09,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 08:57:09,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 368 transitions, 6774 flow. Second operand has 20 states, 20 states have (on average 92.4) internal successors, (1848), 20 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:09,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:57:09,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 08:57:09,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:57:24,865 WARN L234 SmtUtils]: Spent 12.33s on a formula simplification. DAG size of input: 64 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 08:57:25,841 INFO L124 PetriNetUnfolderBase]: 1739/3256 cut-off events. [2023-08-27 08:57:25,841 INFO L125 PetriNetUnfolderBase]: For 66458/66458 co-relation queries the response was YES. [2023-08-27 08:57:25,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26775 conditions, 3256 events. 1739/3256 cut-off events. For 66458/66458 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 21840 event pairs, 166 based on Foata normal form. 31/3286 useless extension candidates. Maximal degree in co-relation 26693. Up to 1420 conditions per place. [2023-08-27 08:57:25,865 INFO L140 encePairwiseOnDemand]: 354/363 looper letters, 348 selfloop transitions, 99 changer transitions 138/585 dead transitions. [2023-08-27 08:57:25,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 585 transitions, 10860 flow [2023-08-27 08:57:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 08:57:25,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 08:57:25,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2608 transitions. [2023-08-27 08:57:25,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2660952963983267 [2023-08-27 08:57:25,868 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2608 transitions. [2023-08-27 08:57:25,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2608 transitions. [2023-08-27 08:57:25,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:57:25,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2608 transitions. [2023-08-27 08:57:25,871 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 96.5925925925926) internal successors, (2608), 27 states have internal predecessors, (2608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:25,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 363.0) internal successors, (10164), 28 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:25,875 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 363.0) internal successors, (10164), 28 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:25,875 INFO L175 Difference]: Start difference. First operand has 245 places, 368 transitions, 6774 flow. Second operand 27 states and 2608 transitions. [2023-08-27 08:57:25,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 585 transitions, 10860 flow [2023-08-27 08:57:26,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 585 transitions, 10801 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-27 08:57:26,198 INFO L231 Difference]: Finished difference. Result has 275 places, 373 transitions, 7141 flow [2023-08-27 08:57:26,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=6714, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7141, PETRI_PLACES=275, PETRI_TRANSITIONS=373} [2023-08-27 08:57:26,198 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 252 predicate places. [2023-08-27 08:57:26,198 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 373 transitions, 7141 flow [2023-08-27 08:57:26,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 92.4) internal successors, (1848), 20 states have internal predecessors, (1848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:26,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:57:26,199 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:57:26,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-27 08:57:26,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-27 08:57:26,404 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:57:26,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:57:26,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1917085972, now seen corresponding path program 7 times [2023-08-27 08:57:26,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:57:26,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219498746] [2023-08-27 08:57:26,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:26,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:57:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:57:26,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:57:26,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219498746] [2023-08-27 08:57:26,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219498746] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:57:26,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185368058] [2023-08-27 08:57:26,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:57:26,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:26,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:57:26,497 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:57:26,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-27 08:57:26,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:26,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-27 08:57:26,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:57:26,608 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 08:57:26,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:57:26,662 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:57:26,785 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:57:26,787 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:57:26,787 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 17 treesize of output 10 [2023-08-27 08:57:26,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:57:26,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:57:27,225 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:57:27,225 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 55 treesize of output 44 [2023-08-27 08:57:27,232 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 08:57:27,232 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 198 treesize of output 169 [2023-08-27 08:57:27,237 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:57:27,237 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 33 treesize of output 21 [2023-08-27 08:57:27,243 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 08:57:27,243 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 44 treesize of output 20 [2023-08-27 08:57:27,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:57:27,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185368058] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:57:27,278 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:57:27,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 23 [2023-08-27 08:57:27,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763123994] [2023-08-27 08:57:27,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:57:27,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 08:57:27,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:57:27,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 08:57:27,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=399, Unknown=3, NotChecked=0, Total=506 [2023-08-27 08:57:27,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 08:57:27,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 373 transitions, 7141 flow. Second operand has 23 states, 23 states have (on average 92.0) internal successors, (2116), 23 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:27,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:57:27,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 08:57:27,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:57:42,818 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:57:44,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-27 08:57:45,587 INFO L124 PetriNetUnfolderBase]: 1412/2687 cut-off events. [2023-08-27 08:57:45,588 INFO L125 PetriNetUnfolderBase]: For 59907/59907 co-relation queries the response was YES. [2023-08-27 08:57:45,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22903 conditions, 2687 events. 1412/2687 cut-off events. For 59907/59907 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 17672 event pairs, 99 based on Foata normal form. 9/2695 useless extension candidates. Maximal degree in co-relation 22812. Up to 731 conditions per place. [2023-08-27 08:57:45,615 INFO L140 encePairwiseOnDemand]: 352/363 looper letters, 430 selfloop transitions, 162 changer transitions 37/629 dead transitions. [2023-08-27 08:57:45,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 629 transitions, 12354 flow [2023-08-27 08:57:45,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-27 08:57:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-27 08:57:45,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3606 transitions. [2023-08-27 08:57:45,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2614180078294911 [2023-08-27 08:57:45,632 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3606 transitions. [2023-08-27 08:57:45,632 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3606 transitions. [2023-08-27 08:57:45,633 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:57:45,633 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3606 transitions. [2023-08-27 08:57:45,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 94.89473684210526) internal successors, (3606), 38 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:45,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 363.0) internal successors, (14157), 39 states have internal predecessors, (14157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:45,641 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 363.0) internal successors, (14157), 39 states have internal predecessors, (14157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:45,642 INFO L175 Difference]: Start difference. First operand has 275 places, 373 transitions, 7141 flow. Second operand 38 states and 3606 transitions. [2023-08-27 08:57:45,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 629 transitions, 12354 flow [2023-08-27 08:57:45,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 629 transitions, 12082 flow, removed 74 selfloop flow, removed 12 redundant places. [2023-08-27 08:57:45,947 INFO L231 Difference]: Finished difference. Result has 298 places, 407 transitions, 8203 flow [2023-08-27 08:57:45,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=6957, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=8203, PETRI_PLACES=298, PETRI_TRANSITIONS=407} [2023-08-27 08:57:45,947 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 275 predicate places. [2023-08-27 08:57:45,947 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 407 transitions, 8203 flow [2023-08-27 08:57:45,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 92.0) internal successors, (2116), 23 states have internal predecessors, (2116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:45,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:57:45,948 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:57:45,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-27 08:57:46,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:46,152 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:57:46,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:57:46,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1769560180, now seen corresponding path program 8 times [2023-08-27 08:57:46,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:57:46,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954473662] [2023-08-27 08:57:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:46,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:57:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:57:46,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:57:46,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954473662] [2023-08-27 08:57:46,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954473662] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:57:46,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005744537] [2023-08-27 08:57:46,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:57:46,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:46,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:57:46,291 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:57:46,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-27 08:57:46,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:57:46,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:57:46,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-27 08:57:46,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:57:46,504 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:57:46,505 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:57:46,506 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 17 treesize of output 10 [2023-08-27 08:57:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:57:46,520 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:57:46,597 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:57:46,598 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 136 treesize of output 128 [2023-08-27 08:57:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:57:46,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005744537] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:57:46,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:57:46,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2023-08-27 08:57:46,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067612930] [2023-08-27 08:57:46,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:57:46,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 08:57:46,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:57:46,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 08:57:46,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2023-08-27 08:57:46,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 363 [2023-08-27 08:57:46,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 407 transitions, 8203 flow. Second operand has 17 states, 17 states have (on average 99.70588235294117) internal successors, (1695), 17 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:46,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:57:46,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 363 [2023-08-27 08:57:46,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:57:47,681 INFO L124 PetriNetUnfolderBase]: 1369/2574 cut-off events. [2023-08-27 08:57:47,682 INFO L125 PetriNetUnfolderBase]: For 60716/60716 co-relation queries the response was YES. [2023-08-27 08:57:47,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22513 conditions, 2574 events. 1369/2574 cut-off events. For 60716/60716 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16542 event pairs, 90 based on Foata normal form. 8/2581 useless extension candidates. Maximal degree in co-relation 22422. Up to 1097 conditions per place. [2023-08-27 08:57:47,700 INFO L140 encePairwiseOnDemand]: 354/363 looper letters, 412 selfloop transitions, 123 changer transitions 22/557 dead transitions. [2023-08-27 08:57:47,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 557 transitions, 11504 flow [2023-08-27 08:57:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 08:57:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 08:57:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2548 transitions. [2023-08-27 08:57:47,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28077134986225893 [2023-08-27 08:57:47,703 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2548 transitions. [2023-08-27 08:57:47,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2548 transitions. [2023-08-27 08:57:47,703 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:57:47,703 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2548 transitions. [2023-08-27 08:57:47,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 101.92) internal successors, (2548), 25 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:47,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 363.0) internal successors, (9438), 26 states have internal predecessors, (9438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:47,709 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 363.0) internal successors, (9438), 26 states have internal predecessors, (9438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:47,709 INFO L175 Difference]: Start difference. First operand has 298 places, 407 transitions, 8203 flow. Second operand 25 states and 2548 transitions. [2023-08-27 08:57:47,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 557 transitions, 11504 flow [2023-08-27 08:57:47,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 557 transitions, 10821 flow, removed 183 selfloop flow, removed 27 redundant places. [2023-08-27 08:57:47,917 INFO L231 Difference]: Finished difference. Result has 288 places, 407 transitions, 7909 flow [2023-08-27 08:57:47,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=7567, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=7909, PETRI_PLACES=288, PETRI_TRANSITIONS=407} [2023-08-27 08:57:47,917 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 265 predicate places. [2023-08-27 08:57:47,917 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 407 transitions, 7909 flow [2023-08-27 08:57:47,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 99.70588235294117) internal successors, (1695), 17 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:47,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:57:47,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:57:47,923 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 08:57:48,122 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,SelfDestructingSolverStorable28 [2023-08-27 08:57:48,123 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:57:48,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:57:48,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1541136208, now seen corresponding path program 1 times [2023-08-27 08:57:48,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:57:48,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315628054] [2023-08-27 08:57:48,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:48,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:57:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:57:48,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:57:48,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315628054] [2023-08-27 08:57:48,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315628054] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:57:48,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283338001] [2023-08-27 08:57:48,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:48,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:48,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:57:48,201 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:57:48,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-27 08:57:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:48,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 08:57:48,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:57:48,326 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 08:57:48,351 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 08:57:48,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:57:48,402 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 08:57:48,532 INFO L322 Elim1Store]: treesize reduction 18, result has 28.0 percent of original size [2023-08-27 08:57:48,532 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 180 treesize of output 118 [2023-08-27 08:57:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:57:48,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:57:48,950 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:57:48,951 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 137 treesize of output 89 [2023-08-27 08:57:48,965 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:57:48,966 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 388 treesize of output 348 [2023-08-27 08:57:48,977 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:57:48,978 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 208 treesize of output 180 [2023-08-27 08:57:48,995 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:57:48,995 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 101 [2023-08-27 08:57:49,298 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-27 08:57:49,360 INFO L322 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-08-27 08:57:49,360 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 273 treesize of output 1 [2023-08-27 08:57:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:57:49,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283338001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:57:49,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:57:49,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2023-08-27 08:57:49,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221847123] [2023-08-27 08:57:49,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:57:49,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-27 08:57:49,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:57:49,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-27 08:57:49,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=310, Unknown=4, NotChecked=0, Total=380 [2023-08-27 08:57:49,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 363 [2023-08-27 08:57:49,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 407 transitions, 7909 flow. Second operand has 20 states, 20 states have (on average 80.55) internal successors, (1611), 20 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:49,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:57:49,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 363 [2023-08-27 08:57:49,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:57:50,461 INFO L124 PetriNetUnfolderBase]: 1182/2274 cut-off events. [2023-08-27 08:57:50,461 INFO L125 PetriNetUnfolderBase]: For 51553/51553 co-relation queries the response was YES. [2023-08-27 08:57:50,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18244 conditions, 2274 events. 1182/2274 cut-off events. For 51553/51553 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 14497 event pairs, 124 based on Foata normal form. 125/2398 useless extension candidates. Maximal degree in co-relation 18156. Up to 990 conditions per place. [2023-08-27 08:57:50,479 INFO L140 encePairwiseOnDemand]: 354/363 looper letters, 253 selfloop transitions, 100 changer transitions 104/457 dead transitions. [2023-08-27 08:57:50,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 457 transitions, 8803 flow [2023-08-27 08:57:50,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 08:57:50,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 08:57:50,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1603 transitions. [2023-08-27 08:57:50,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.23241989270697405 [2023-08-27 08:57:50,481 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1603 transitions. [2023-08-27 08:57:50,481 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1603 transitions. [2023-08-27 08:57:50,481 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:57:50,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1603 transitions. [2023-08-27 08:57:50,483 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 84.36842105263158) internal successors, (1603), 19 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:50,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 363.0) internal successors, (7260), 20 states have internal predecessors, (7260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:50,485 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 363.0) internal successors, (7260), 20 states have internal predecessors, (7260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:50,486 INFO L175 Difference]: Start difference. First operand has 288 places, 407 transitions, 7909 flow. Second operand 19 states and 1603 transitions. [2023-08-27 08:57:50,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 457 transitions, 8803 flow [2023-08-27 08:57:50,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 457 transitions, 8252 flow, removed 119 selfloop flow, removed 19 redundant places. [2023-08-27 08:57:50,627 INFO L231 Difference]: Finished difference. Result has 274 places, 330 transitions, 5965 flow [2023-08-27 08:57:50,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=6750, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5965, PETRI_PLACES=274, PETRI_TRANSITIONS=330} [2023-08-27 08:57:50,628 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 251 predicate places. [2023-08-27 08:57:50,628 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 330 transitions, 5965 flow [2023-08-27 08:57:50,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 80.55) internal successors, (1611), 20 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:50,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:57:50,628 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:57:50,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-27 08:57:50,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:50,833 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:57:50,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:57:50,833 INFO L85 PathProgramCache]: Analyzing trace with hash -811224757, now seen corresponding path program 11 times [2023-08-27 08:57:50,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:57:50,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419736203] [2023-08-27 08:57:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:50,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:57:50,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:50,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:57:50,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419736203] [2023-08-27 08:57:50,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419736203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:57:50,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104563778] [2023-08-27 08:57:50,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:57:50,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:50,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:57:50,989 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:57:50,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-27 08:57:51,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:57:51,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:57:51,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 08:57:51,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:57:51,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:51,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:57:51,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:51,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104563778] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:57:51,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:57:51,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-27 08:57:51,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716085147] [2023-08-27 08:57:51,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:57:51,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 08:57:51,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:57:51,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 08:57:51,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2023-08-27 08:57:51,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:57:51,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 330 transitions, 5965 flow. Second operand has 14 states, 14 states have (on average 140.0) internal successors, (1960), 14 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:51,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:57:51,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:57:51,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:57:52,220 INFO L124 PetriNetUnfolderBase]: 978/1827 cut-off events. [2023-08-27 08:57:52,220 INFO L125 PetriNetUnfolderBase]: For 33749/33749 co-relation queries the response was YES. [2023-08-27 08:57:52,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14875 conditions, 1827 events. 978/1827 cut-off events. For 33749/33749 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 10730 event pairs, 130 based on Foata normal form. 16/1842 useless extension candidates. Maximal degree in co-relation 14789. Up to 576 conditions per place. [2023-08-27 08:57:52,236 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 211 selfloop transitions, 180 changer transitions 1/392 dead transitions. [2023-08-27 08:57:52,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 392 transitions, 7211 flow [2023-08-27 08:57:52,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-27 08:57:52,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-27 08:57:52,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2442 transitions. [2023-08-27 08:57:52,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39572192513368987 [2023-08-27 08:57:52,238 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2442 transitions. [2023-08-27 08:57:52,238 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2442 transitions. [2023-08-27 08:57:52,238 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:57:52,238 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2442 transitions. [2023-08-27 08:57:52,240 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 143.64705882352942) internal successors, (2442), 17 states have internal predecessors, (2442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:52,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 363.0) internal successors, (6534), 18 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:52,243 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 363.0) internal successors, (6534), 18 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:52,243 INFO L175 Difference]: Start difference. First operand has 274 places, 330 transitions, 5965 flow. Second operand 17 states and 2442 transitions. [2023-08-27 08:57:52,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 392 transitions, 7211 flow [2023-08-27 08:57:52,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 392 transitions, 6826 flow, removed 165 selfloop flow, removed 16 redundant places. [2023-08-27 08:57:52,355 INFO L231 Difference]: Finished difference. Result has 248 places, 341 transitions, 6184 flow [2023-08-27 08:57:52,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=5593, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=6184, PETRI_PLACES=248, PETRI_TRANSITIONS=341} [2023-08-27 08:57:52,355 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 225 predicate places. [2023-08-27 08:57:52,355 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 341 transitions, 6184 flow [2023-08-27 08:57:52,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 140.0) internal successors, (1960), 14 states have internal predecessors, (1960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:52,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:57:52,356 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:57:52,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-08-27 08:57:52,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:52,561 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:57:52,561 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:57:52,561 INFO L85 PathProgramCache]: Analyzing trace with hash -683745189, now seen corresponding path program 9 times [2023-08-27 08:57:52,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:57:52,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328551072] [2023-08-27 08:57:52,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:52,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:57:52,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:52,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:57:52,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328551072] [2023-08-27 08:57:52,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328551072] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:57:52,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624903323] [2023-08-27 08:57:52,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:57:52,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:52,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:57:52,723 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:57:52,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-27 08:57:52,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:57:52,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:57:52,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 08:57:52,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:57:52,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:52,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:57:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:52,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624903323] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:57:52,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:57:52,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2023-08-27 08:57:52,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417284946] [2023-08-27 08:57:52,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:57:52,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-27 08:57:52,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:57:52,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-27 08:57:52,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-08-27 08:57:52,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:57:52,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 341 transitions, 6184 flow. Second operand has 13 states, 13 states have (on average 140.07692307692307) internal successors, (1821), 13 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:52,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:57:52,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:57:52,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:57:53,692 INFO L124 PetriNetUnfolderBase]: 996/1849 cut-off events. [2023-08-27 08:57:53,692 INFO L125 PetriNetUnfolderBase]: For 30363/30363 co-relation queries the response was YES. [2023-08-27 08:57:53,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14564 conditions, 1849 events. 996/1849 cut-off events. For 30363/30363 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 10896 event pairs, 174 based on Foata normal form. 6/1854 useless extension candidates. Maximal degree in co-relation 14485. Up to 973 conditions per place. [2023-08-27 08:57:53,708 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 330 selfloop transitions, 87 changer transitions 2/419 dead transitions. [2023-08-27 08:57:53,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 419 transitions, 7951 flow [2023-08-27 08:57:53,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 08:57:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-27 08:57:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 2293 transitions. [2023-08-27 08:57:53,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3948002754820937 [2023-08-27 08:57:53,711 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 2293 transitions. [2023-08-27 08:57:53,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 2293 transitions. [2023-08-27 08:57:53,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:57:53,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 2293 transitions. [2023-08-27 08:57:53,714 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 143.3125) internal successors, (2293), 16 states have internal predecessors, (2293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:53,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 363.0) internal successors, (6171), 17 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:53,718 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 363.0) internal successors, (6171), 17 states have internal predecessors, (6171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:53,718 INFO L175 Difference]: Start difference. First operand has 248 places, 341 transitions, 6184 flow. Second operand 16 states and 2293 transitions. [2023-08-27 08:57:53,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 419 transitions, 7951 flow [2023-08-27 08:57:53,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 419 transitions, 7539 flow, removed 22 selfloop flow, removed 9 redundant places. [2023-08-27 08:57:53,825 INFO L231 Difference]: Finished difference. Result has 256 places, 348 transitions, 6137 flow [2023-08-27 08:57:53,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=5772, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=6137, PETRI_PLACES=256, PETRI_TRANSITIONS=348} [2023-08-27 08:57:53,826 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 233 predicate places. [2023-08-27 08:57:53,826 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 348 transitions, 6137 flow [2023-08-27 08:57:53,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 140.07692307692307) internal successors, (1821), 13 states have internal predecessors, (1821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:53,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:57:53,827 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:57:53,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-27 08:57:54,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:54,032 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:57:54,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:57:54,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1224165643, now seen corresponding path program 10 times [2023-08-27 08:57:54,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:57:54,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167260948] [2023-08-27 08:57:54,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:54,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:57:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:54,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:54,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:57:54,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167260948] [2023-08-27 08:57:54,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167260948] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:57:54,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035753957] [2023-08-27 08:57:54,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:57:54,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:54,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:57:54,198 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:57:54,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-27 08:57:54,321 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:57:54,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:57:54,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 08:57:54,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:57:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:54,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:57:54,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:54,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035753957] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:57:54,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:57:54,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2023-08-27 08:57:54,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459399017] [2023-08-27 08:57:54,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:57:54,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-27 08:57:54,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:57:54,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-27 08:57:54,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2023-08-27 08:57:54,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:57:54,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 348 transitions, 6137 flow. Second operand has 12 states, 12 states have (on average 140.33333333333334) internal successors, (1684), 12 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:54,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:57:54,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:57:54,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:57:55,032 INFO L124 PetriNetUnfolderBase]: 1080/2053 cut-off events. [2023-08-27 08:57:55,032 INFO L125 PetriNetUnfolderBase]: For 31545/31545 co-relation queries the response was YES. [2023-08-27 08:57:55,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15508 conditions, 2053 events. 1080/2053 cut-off events. For 31545/31545 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 12605 event pairs, 188 based on Foata normal form. 24/2076 useless extension candidates. Maximal degree in co-relation 15428. Up to 1247 conditions per place. [2023-08-27 08:57:55,048 INFO L140 encePairwiseOnDemand]: 356/363 looper letters, 299 selfloop transitions, 125 changer transitions 0/424 dead transitions. [2023-08-27 08:57:55,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 424 transitions, 7866 flow [2023-08-27 08:57:55,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-27 08:57:55,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-27 08:57:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1590 transitions. [2023-08-27 08:57:55,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3981968444778362 [2023-08-27 08:57:55,050 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1590 transitions. [2023-08-27 08:57:55,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1590 transitions. [2023-08-27 08:57:55,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:57:55,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1590 transitions. [2023-08-27 08:57:55,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 144.54545454545453) internal successors, (1590), 11 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:55,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 363.0) internal successors, (4356), 12 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:55,053 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 363.0) internal successors, (4356), 12 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:55,053 INFO L175 Difference]: Start difference. First operand has 256 places, 348 transitions, 6137 flow. Second operand 11 states and 1590 transitions. [2023-08-27 08:57:55,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 424 transitions, 7866 flow [2023-08-27 08:57:55,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 424 transitions, 7613 flow, removed 25 selfloop flow, removed 11 redundant places. [2023-08-27 08:57:55,144 INFO L231 Difference]: Finished difference. Result has 254 places, 376 transitions, 6744 flow [2023-08-27 08:57:55,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=5813, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6744, PETRI_PLACES=254, PETRI_TRANSITIONS=376} [2023-08-27 08:57:55,144 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 231 predicate places. [2023-08-27 08:57:55,145 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 376 transitions, 6744 flow [2023-08-27 08:57:55,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 140.33333333333334) internal successors, (1684), 12 states have internal predecessors, (1684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:55,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:57:55,145 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:57:55,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-27 08:57:55,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:55,350 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:57:55,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:57:55,350 INFO L85 PathProgramCache]: Analyzing trace with hash -912614900, now seen corresponding path program 2 times [2023-08-27 08:57:55,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:57:55,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399587515] [2023-08-27 08:57:55,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:55,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:57:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:57:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:57:56,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:57:56,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399587515] [2023-08-27 08:57:56,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399587515] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:57:56,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648447401] [2023-08-27 08:57:56,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:57:56,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:57:56,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:57:56,366 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:57:56,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-27 08:57:56,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:57:56,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:57:56,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 08:57:56,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:57:56,700 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:57:56,700 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-08-27 08:57:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:57:56,791 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:57:57,181 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 08:57:57,181 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 08:57:57,261 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-27 08:57:57,261 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-27 08:57:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:57:57,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648447401] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:57:57,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:57:57,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-27 08:57:57,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465396510] [2023-08-27 08:57:57,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:57:57,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 08:57:57,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:57:57,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 08:57:57,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2023-08-27 08:57:57,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 08:57:57,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 376 transitions, 6744 flow. Second operand has 29 states, 29 states have (on average 91.65517241379311) internal successors, (2658), 29 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:57,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:57:57,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 08:57:57,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:57:59,436 INFO L124 PetriNetUnfolderBase]: 1377/2616 cut-off events. [2023-08-27 08:57:59,436 INFO L125 PetriNetUnfolderBase]: For 43017/43017 co-relation queries the response was YES. [2023-08-27 08:57:59,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20598 conditions, 2616 events. 1377/2616 cut-off events. For 43017/43017 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16891 event pairs, 160 based on Foata normal form. 6/2621 useless extension candidates. Maximal degree in co-relation 20521. Up to 1930 conditions per place. [2023-08-27 08:57:59,458 INFO L140 encePairwiseOnDemand]: 352/363 looper letters, 402 selfloop transitions, 180 changer transitions 15/597 dead transitions. [2023-08-27 08:57:59,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 597 transitions, 10781 flow [2023-08-27 08:57:59,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 08:57:59,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 08:57:59,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3087 transitions. [2023-08-27 08:57:59,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.265754132231405 [2023-08-27 08:57:59,461 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3087 transitions. [2023-08-27 08:57:59,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3087 transitions. [2023-08-27 08:57:59,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:57:59,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3087 transitions. [2023-08-27 08:57:59,464 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 96.46875) internal successors, (3087), 32 states have internal predecessors, (3087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:59,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 363.0) internal successors, (11979), 33 states have internal predecessors, (11979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:59,468 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 363.0) internal successors, (11979), 33 states have internal predecessors, (11979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:59,468 INFO L175 Difference]: Start difference. First operand has 254 places, 376 transitions, 6744 flow. Second operand 32 states and 3087 transitions. [2023-08-27 08:57:59,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 597 transitions, 10781 flow [2023-08-27 08:57:59,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 597 transitions, 10655 flow, removed 24 selfloop flow, removed 6 redundant places. [2023-08-27 08:57:59,613 INFO L231 Difference]: Finished difference. Result has 286 places, 477 transitions, 9180 flow [2023-08-27 08:57:59,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=6663, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=9180, PETRI_PLACES=286, PETRI_TRANSITIONS=477} [2023-08-27 08:57:59,613 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 263 predicate places. [2023-08-27 08:57:59,614 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 477 transitions, 9180 flow [2023-08-27 08:57:59,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 91.65517241379311) internal successors, (2658), 29 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:57:59,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:57:59,614 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:57:59,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-27 08:57:59,819 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,SelfDestructingSolverStorable33 [2023-08-27 08:57:59,819 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:57:59,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:57:59,819 INFO L85 PathProgramCache]: Analyzing trace with hash 669474934, now seen corresponding path program 3 times [2023-08-27 08:57:59,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:57:59,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325528966] [2023-08-27 08:57:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:57:59,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:57:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:58:00,719 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:58:00,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:58:00,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325528966] [2023-08-27 08:58:00,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325528966] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:58:00,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534155133] [2023-08-27 08:58:00,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:58:00,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:58:00,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:58:00,720 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:58:00,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-27 08:58:00,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:58:00,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:58:00,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 08:58:00,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:58:01,042 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:58:01,043 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-27 08:58:01,044 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:58:01,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:58:01,404 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 08:58:01,405 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 08:58:01,459 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-27 08:58:01,460 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-27 08:58:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:01,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534155133] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:58:01,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:58:01,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-27 08:58:01,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883693488] [2023-08-27 08:58:01,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:58:01,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 08:58:01,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:58:01,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 08:58:01,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2023-08-27 08:58:01,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 08:58:01,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 477 transitions, 9180 flow. Second operand has 29 states, 29 states have (on average 91.79310344827586) internal successors, (2662), 29 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:01,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:58:01,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 08:58:01,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:58:04,367 INFO L124 PetriNetUnfolderBase]: 1509/2864 cut-off events. [2023-08-27 08:58:04,367 INFO L125 PetriNetUnfolderBase]: For 54472/54472 co-relation queries the response was YES. [2023-08-27 08:58:04,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23976 conditions, 2864 events. 1509/2864 cut-off events. For 54472/54472 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 18901 event pairs, 166 based on Foata normal form. 8/2871 useless extension candidates. Maximal degree in co-relation 23892. Up to 2053 conditions per place. [2023-08-27 08:58:04,389 INFO L140 encePairwiseOnDemand]: 351/363 looper letters, 412 selfloop transitions, 217 changer transitions 27/656 dead transitions. [2023-08-27 08:58:04,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 656 transitions, 12445 flow [2023-08-27 08:58:04,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-08-27 08:58:04,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-08-27 08:58:04,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3640 transitions. [2023-08-27 08:58:04,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26388284761490505 [2023-08-27 08:58:04,415 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3640 transitions. [2023-08-27 08:58:04,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3640 transitions. [2023-08-27 08:58:04,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:58:04,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3640 transitions. [2023-08-27 08:58:04,419 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 95.78947368421052) internal successors, (3640), 38 states have internal predecessors, (3640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:04,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 363.0) internal successors, (14157), 39 states have internal predecessors, (14157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:04,424 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 363.0) internal successors, (14157), 39 states have internal predecessors, (14157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:04,424 INFO L175 Difference]: Start difference. First operand has 286 places, 477 transitions, 9180 flow. Second operand 38 states and 3640 transitions. [2023-08-27 08:58:04,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 656 transitions, 12445 flow [2023-08-27 08:58:04,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 656 transitions, 12158 flow, removed 112 selfloop flow, removed 8 redundant places. [2023-08-27 08:58:04,614 INFO L231 Difference]: Finished difference. Result has 326 places, 533 transitions, 10725 flow [2023-08-27 08:58:04,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=8942, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=10725, PETRI_PLACES=326, PETRI_TRANSITIONS=533} [2023-08-27 08:58:04,615 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 303 predicate places. [2023-08-27 08:58:04,615 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 533 transitions, 10725 flow [2023-08-27 08:58:04,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 91.79310344827586) internal successors, (2662), 29 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:04,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:58:04,615 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:58:04,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-27 08:58:04,820 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,SelfDestructingSolverStorable34 [2023-08-27 08:58:04,820 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:58:04,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:58:04,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1619180800, now seen corresponding path program 4 times [2023-08-27 08:58:04,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:58:04,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955894612] [2023-08-27 08:58:04,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:58:04,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:58:04,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:58:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:58:05,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:58:05,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955894612] [2023-08-27 08:58:05,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955894612] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:58:05,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680208957] [2023-08-27 08:58:05,629 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:58:05,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:58:05,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:58:05,630 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:58:05,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-27 08:58:05,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:58:05,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:58:05,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 08:58:05,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:58:05,920 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:58:05,920 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2023-08-27 08:58:05,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:58:05,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:58:06,280 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 08:58:06,281 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 08:58:06,346 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-27 08:58:06,347 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-27 08:58:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:06,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680208957] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:58:06,386 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:58:06,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 26 [2023-08-27 08:58:06,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679062557] [2023-08-27 08:58:06,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:58:06,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:58:06,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:58:06,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:58:06,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2023-08-27 08:58:06,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 08:58:06,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 533 transitions, 10725 flow. Second operand has 28 states, 28 states have (on average 91.71428571428571) internal successors, (2568), 28 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:06,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:58:06,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 08:58:06,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:58:08,889 INFO L124 PetriNetUnfolderBase]: 1519/2896 cut-off events. [2023-08-27 08:58:08,889 INFO L125 PetriNetUnfolderBase]: For 63153/63153 co-relation queries the response was YES. [2023-08-27 08:58:08,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25265 conditions, 2896 events. 1519/2896 cut-off events. For 63153/63153 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 19360 event pairs, 190 based on Foata normal form. 6/2901 useless extension candidates. Maximal degree in co-relation 25169. Up to 2172 conditions per place. [2023-08-27 08:58:08,915 INFO L140 encePairwiseOnDemand]: 351/363 looper letters, 442 selfloop transitions, 200 changer transitions 26/668 dead transitions. [2023-08-27 08:58:08,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 668 transitions, 13039 flow [2023-08-27 08:58:08,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 08:58:08,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 08:58:08,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3564 transitions. [2023-08-27 08:58:08,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26535626535626533 [2023-08-27 08:58:08,919 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3564 transitions. [2023-08-27 08:58:08,919 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3564 transitions. [2023-08-27 08:58:08,920 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:58:08,920 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3564 transitions. [2023-08-27 08:58:08,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 96.32432432432432) internal successors, (3564), 37 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:08,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 363.0) internal successors, (13794), 38 states have internal predecessors, (13794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:08,933 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 363.0) internal successors, (13794), 38 states have internal predecessors, (13794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:08,934 INFO L175 Difference]: Start difference. First operand has 326 places, 533 transitions, 10725 flow. Second operand 37 states and 3564 transitions. [2023-08-27 08:58:08,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 668 transitions, 13039 flow [2023-08-27 08:58:09,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 668 transitions, 12620 flow, removed 121 selfloop flow, removed 12 redundant places. [2023-08-27 08:58:09,236 INFO L231 Difference]: Finished difference. Result has 356 places, 543 transitions, 10978 flow [2023-08-27 08:58:09,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=10331, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=10978, PETRI_PLACES=356, PETRI_TRANSITIONS=543} [2023-08-27 08:58:09,236 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 333 predicate places. [2023-08-27 08:58:09,236 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 543 transitions, 10978 flow [2023-08-27 08:58:09,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 91.71428571428571) internal successors, (2568), 28 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:09,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:58:09,237 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:58:09,248 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-08-27 08:58:09,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-27 08:58:09,449 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:58:09,450 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:58:09,450 INFO L85 PathProgramCache]: Analyzing trace with hash 589861340, now seen corresponding path program 5 times [2023-08-27 08:58:09,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:58:09,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967521553] [2023-08-27 08:58:09,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:58:09,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:58:09,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:58:10,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:58:10,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:58:10,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967521553] [2023-08-27 08:58:10,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967521553] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:58:10,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459376887] [2023-08-27 08:58:10,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:58:10,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:58:10,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:58:10,029 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:58:10,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-27 08:58:10,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:58:10,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:58:10,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 08:58:10,151 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:58:10,536 INFO L322 Elim1Store]: treesize reduction 76, result has 58.9 percent of original size [2023-08-27 08:58:10,537 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 21 case distinctions, treesize of input 104 treesize of output 180 [2023-08-27 08:58:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:12,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:58:12,904 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 08:58:12,904 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 08:58:12,959 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-27 08:58:12,959 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-27 08:58:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:13,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459376887] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:58:13,033 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:58:13,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 8] total 27 [2023-08-27 08:58:13,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471538924] [2023-08-27 08:58:13,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:58:13,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 08:58:13,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:58:13,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 08:58:13,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2023-08-27 08:58:13,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 363 [2023-08-27 08:58:13,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 543 transitions, 10978 flow. Second operand has 29 states, 29 states have (on average 98.62068965517241) internal successors, (2860), 29 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:13,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:58:13,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 363 [2023-08-27 08:58:13,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:58:15,525 INFO L124 PetriNetUnfolderBase]: 1599/3030 cut-off events. [2023-08-27 08:58:15,525 INFO L125 PetriNetUnfolderBase]: For 71147/71147 co-relation queries the response was YES. [2023-08-27 08:58:15,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26670 conditions, 3030 events. 1599/3030 cut-off events. For 71147/71147 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20219 event pairs, 224 based on Foata normal form. 3/3032 useless extension candidates. Maximal degree in co-relation 26570. Up to 2670 conditions per place. [2023-08-27 08:58:15,555 INFO L140 encePairwiseOnDemand]: 352/363 looper letters, 531 selfloop transitions, 125 changer transitions 15/671 dead transitions. [2023-08-27 08:58:15,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 671 transitions, 13777 flow [2023-08-27 08:58:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-27 08:58:15,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-27 08:58:15,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3766 transitions. [2023-08-27 08:58:15,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28039609857791675 [2023-08-27 08:58:15,559 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3766 transitions. [2023-08-27 08:58:15,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3766 transitions. [2023-08-27 08:58:15,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:58:15,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3766 transitions. [2023-08-27 08:58:15,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 101.78378378378379) internal successors, (3766), 37 states have internal predecessors, (3766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:15,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 363.0) internal successors, (13794), 38 states have internal predecessors, (13794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:15,570 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 363.0) internal successors, (13794), 38 states have internal predecessors, (13794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:15,570 INFO L175 Difference]: Start difference. First operand has 356 places, 543 transitions, 10978 flow. Second operand 37 states and 3766 transitions. [2023-08-27 08:58:15,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 671 transitions, 13777 flow [2023-08-27 08:58:15,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 671 transitions, 13325 flow, removed 52 selfloop flow, removed 31 redundant places. [2023-08-27 08:58:15,860 INFO L231 Difference]: Finished difference. Result has 366 places, 594 transitions, 11938 flow [2023-08-27 08:58:15,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=10538, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=11938, PETRI_PLACES=366, PETRI_TRANSITIONS=594} [2023-08-27 08:58:15,860 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 343 predicate places. [2023-08-27 08:58:15,860 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 594 transitions, 11938 flow [2023-08-27 08:58:15,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 98.62068965517241) internal successors, (2860), 29 states have internal predecessors, (2860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:15,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:58:15,861 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:58:15,866 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-27 08:58:16,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:58:16,065 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:58:16,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:58:16,066 INFO L85 PathProgramCache]: Analyzing trace with hash 590455986, now seen corresponding path program 6 times [2023-08-27 08:58:16,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:58:16,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919485030] [2023-08-27 08:58:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:58:16,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:58:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:58:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:58:17,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:58:17,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919485030] [2023-08-27 08:58:17,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919485030] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:58:17,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539304923] [2023-08-27 08:58:17,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:58:17,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:58:17,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:58:17,038 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:58:17,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-27 08:58:17,174 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 08:58:17,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:58:17,176 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 08:58:17,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:58:17,402 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:58:17,402 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-08-27 08:58:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:58:17,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:58:17,935 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 08:58:17,936 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 08:58:17,987 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-27 08:58:17,988 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-27 08:58:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:18,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539304923] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:58:18,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:58:18,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-27 08:58:18,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459029263] [2023-08-27 08:58:18,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:58:18,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 08:58:18,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:58:18,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 08:58:18,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=683, Unknown=0, NotChecked=0, Total=812 [2023-08-27 08:58:18,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 08:58:18,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 594 transitions, 11938 flow. Second operand has 29 states, 29 states have (on average 91.65517241379311) internal successors, (2658), 29 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:18,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:58:18,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 08:58:18,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:58:20,052 INFO L124 PetriNetUnfolderBase]: 1683/3155 cut-off events. [2023-08-27 08:58:20,052 INFO L125 PetriNetUnfolderBase]: For 81900/81900 co-relation queries the response was YES. [2023-08-27 08:58:20,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28234 conditions, 3155 events. 1683/3155 cut-off events. For 81900/81900 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21077 event pairs, 226 based on Foata normal form. 7/3161 useless extension candidates. Maximal degree in co-relation 28130. Up to 2774 conditions per place. [2023-08-27 08:58:20,081 INFO L140 encePairwiseOnDemand]: 352/363 looper letters, 563 selfloop transitions, 125 changer transitions 7/695 dead transitions. [2023-08-27 08:58:20,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 695 transitions, 14500 flow [2023-08-27 08:58:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 08:58:20,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 08:58:20,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3046 transitions. [2023-08-27 08:58:20,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2622245179063361 [2023-08-27 08:58:20,083 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3046 transitions. [2023-08-27 08:58:20,083 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3046 transitions. [2023-08-27 08:58:20,084 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:58:20,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3046 transitions. [2023-08-27 08:58:20,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 95.1875) internal successors, (3046), 32 states have internal predecessors, (3046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:20,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 363.0) internal successors, (11979), 33 states have internal predecessors, (11979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:20,090 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 363.0) internal successors, (11979), 33 states have internal predecessors, (11979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:20,090 INFO L175 Difference]: Start difference. First operand has 366 places, 594 transitions, 11938 flow. Second operand 32 states and 3046 transitions. [2023-08-27 08:58:20,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 695 transitions, 14500 flow [2023-08-27 08:58:20,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 695 transitions, 14058 flow, removed 165 selfloop flow, removed 17 redundant places. [2023-08-27 08:58:20,401 INFO L231 Difference]: Finished difference. Result has 388 places, 624 transitions, 12592 flow [2023-08-27 08:58:20,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=11562, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=12592, PETRI_PLACES=388, PETRI_TRANSITIONS=624} [2023-08-27 08:58:20,402 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 365 predicate places. [2023-08-27 08:58:20,402 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 624 transitions, 12592 flow [2023-08-27 08:58:20,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 91.65517241379311) internal successors, (2658), 29 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:20,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:58:20,402 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:58:20,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-27 08:58:20,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-27 08:58:20,607 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:58:20,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:58:20,607 INFO L85 PathProgramCache]: Analyzing trace with hash 2145665350, now seen corresponding path program 7 times [2023-08-27 08:58:20,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:58:20,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946181625] [2023-08-27 08:58:20,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:58:20,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:58:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:58:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:20,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:58:20,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946181625] [2023-08-27 08:58:20,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946181625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:58:20,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254737446] [2023-08-27 08:58:20,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:58:20,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:58:20,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:58:20,777 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:58:20,806 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-27 08:58:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:58:20,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 08:58:20,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:58:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:20,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:58:21,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:21,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254737446] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:58:21,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:58:21,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-27 08:58:21,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895561621] [2023-08-27 08:58:21,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:58:21,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 08:58:21,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:58:21,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 08:58:21,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-27 08:58:21,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:58:21,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 624 transitions, 12592 flow. Second operand has 14 states, 14 states have (on average 139.92857142857142) internal successors, (1959), 14 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:21,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:58:21,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:58:21,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:58:23,320 INFO L124 PetriNetUnfolderBase]: 2485/4706 cut-off events. [2023-08-27 08:58:23,320 INFO L125 PetriNetUnfolderBase]: For 169971/169971 co-relation queries the response was YES. [2023-08-27 08:58:23,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43251 conditions, 4706 events. 2485/4706 cut-off events. For 169971/169971 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 33801 event pairs, 236 based on Foata normal form. 88/4793 useless extension candidates. Maximal degree in co-relation 43139. Up to 897 conditions per place. [2023-08-27 08:58:23,369 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 411 selfloop transitions, 491 changer transitions 3/905 dead transitions. [2023-08-27 08:58:23,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 905 transitions, 19033 flow [2023-08-27 08:58:23,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-27 08:58:23,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-27 08:58:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3057 transitions. [2023-08-27 08:58:23,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40102321920503736 [2023-08-27 08:58:23,371 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3057 transitions. [2023-08-27 08:58:23,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3057 transitions. [2023-08-27 08:58:23,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:58:23,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3057 transitions. [2023-08-27 08:58:23,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 145.57142857142858) internal successors, (3057), 21 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:23,376 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 363.0) internal successors, (7986), 22 states have internal predecessors, (7986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:23,377 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 363.0) internal successors, (7986), 22 states have internal predecessors, (7986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:23,377 INFO L175 Difference]: Start difference. First operand has 388 places, 624 transitions, 12592 flow. Second operand 21 states and 3057 transitions. [2023-08-27 08:58:23,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 905 transitions, 19033 flow [2023-08-27 08:58:23,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 905 transitions, 18696 flow, removed 116 selfloop flow, removed 21 redundant places. [2023-08-27 08:58:23,925 INFO L231 Difference]: Finished difference. Result has 390 places, 783 transitions, 17318 flow [2023-08-27 08:58:23,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=11964, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=361, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=17318, PETRI_PLACES=390, PETRI_TRANSITIONS=783} [2023-08-27 08:58:23,926 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 367 predicate places. [2023-08-27 08:58:23,926 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 783 transitions, 17318 flow [2023-08-27 08:58:23,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 139.92857142857142) internal successors, (1959), 14 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:23,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:58:23,926 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:58:23,931 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 08:58:24,127 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,SelfDestructingSolverStorable38 [2023-08-27 08:58:24,127 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:58:24,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:58:24,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1404349374, now seen corresponding path program 8 times [2023-08-27 08:58:24,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:58:24,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038986140] [2023-08-27 08:58:24,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:58:24,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:58:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:58:25,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:58:25,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:58:25,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038986140] [2023-08-27 08:58:25,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038986140] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:58:25,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165590121] [2023-08-27 08:58:25,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:58:25,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:58:25,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:58:25,089 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:58:25,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-27 08:58:25,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:58:25,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:58:25,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 08:58:25,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:58:25,439 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:58:25,440 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-27 08:58:25,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:58:25,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:58:25,826 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 08:58:25,826 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 08:58:25,886 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-27 08:58:25,886 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-27 08:58:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:25,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165590121] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:58:25,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:58:25,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-27 08:58:25,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807854069] [2023-08-27 08:58:25,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:58:25,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 08:58:25,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:58:25,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 08:58:25,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2023-08-27 08:58:25,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 08:58:25,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 783 transitions, 17318 flow. Second operand has 29 states, 29 states have (on average 91.65517241379311) internal successors, (2658), 29 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:25,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:58:25,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 08:58:25,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:58:28,823 INFO L124 PetriNetUnfolderBase]: 2497/4725 cut-off events. [2023-08-27 08:58:28,824 INFO L125 PetriNetUnfolderBase]: For 183380/183380 co-relation queries the response was YES. [2023-08-27 08:58:28,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47145 conditions, 4725 events. 2497/4725 cut-off events. For 183380/183380 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 33862 event pairs, 436 based on Foata normal form. 4/4728 useless extension candidates. Maximal degree in co-relation 47028. Up to 4358 conditions per place. [2023-08-27 08:58:28,876 INFO L140 encePairwiseOnDemand]: 351/363 looper letters, 722 selfloop transitions, 131 changer transitions 12/865 dead transitions. [2023-08-27 08:58:28,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 865 transitions, 19706 flow [2023-08-27 08:58:28,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 08:58:28,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 08:58:28,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3142 transitions. [2023-08-27 08:58:28,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.262292344936973 [2023-08-27 08:58:28,878 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3142 transitions. [2023-08-27 08:58:28,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3142 transitions. [2023-08-27 08:58:28,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:58:28,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3142 transitions. [2023-08-27 08:58:28,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 95.21212121212122) internal successors, (3142), 33 states have internal predecessors, (3142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:28,885 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 363.0) internal successors, (12342), 34 states have internal predecessors, (12342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:28,886 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 363.0) internal successors, (12342), 34 states have internal predecessors, (12342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:28,886 INFO L175 Difference]: Start difference. First operand has 390 places, 783 transitions, 17318 flow. Second operand 33 states and 3142 transitions. [2023-08-27 08:58:28,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 865 transitions, 19706 flow [2023-08-27 08:58:29,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 865 transitions, 18807 flow, removed 171 selfloop flow, removed 9 redundant places. [2023-08-27 08:58:29,799 INFO L231 Difference]: Finished difference. Result has 418 places, 790 transitions, 16956 flow [2023-08-27 08:58:29,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=16433, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=16956, PETRI_PLACES=418, PETRI_TRANSITIONS=790} [2023-08-27 08:58:29,800 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 395 predicate places. [2023-08-27 08:58:29,800 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 790 transitions, 16956 flow [2023-08-27 08:58:29,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 91.65517241379311) internal successors, (2658), 29 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:29,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:58:29,801 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:58:29,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-27 08:58:30,005 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,SelfDestructingSolverStorable39 [2023-08-27 08:58:30,006 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:58:30,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:58:30,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1313526746, now seen corresponding path program 9 times [2023-08-27 08:58:30,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:58:30,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196494686] [2023-08-27 08:58:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:58:30,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:58:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:58:30,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:58:30,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:58:30,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196494686] [2023-08-27 08:58:30,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196494686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:58:30,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680228342] [2023-08-27 08:58:30,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:58:30,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:58:30,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:58:30,813 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 08:58:30,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-27 08:58:30,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 08:58:30,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:58:30,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 08:58:30,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:58:31,207 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:58:31,208 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-27 08:58:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:58:31,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:58:31,650 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 08:58:31,650 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-27 08:58:31,751 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 08:58:31,751 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 08:58:31,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:31,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680228342] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:58:31,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:58:31,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-27 08:58:31,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375213573] [2023-08-27 08:58:31,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:58:31,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 08:58:31,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:58:31,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 08:58:31,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2023-08-27 08:58:31,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 08:58:31,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 790 transitions, 16956 flow. Second operand has 29 states, 29 states have (on average 91.72413793103448) internal successors, (2660), 29 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:31,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:58:31,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 08:58:31,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:58:34,447 INFO L124 PetriNetUnfolderBase]: 2575/4857 cut-off events. [2023-08-27 08:58:34,447 INFO L125 PetriNetUnfolderBase]: For 190087/190087 co-relation queries the response was YES. [2023-08-27 08:58:34,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47635 conditions, 4857 events. 2575/4857 cut-off events. For 190087/190087 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 34744 event pairs, 450 based on Foata normal form. 5/4861 useless extension candidates. Maximal degree in co-relation 47516. Up to 4473 conditions per place. [2023-08-27 08:58:34,506 INFO L140 encePairwiseOnDemand]: 352/363 looper letters, 785 selfloop transitions, 105 changer transitions 9/899 dead transitions. [2023-08-27 08:58:34,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 899 transitions, 19916 flow [2023-08-27 08:58:34,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 08:58:34,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 08:58:34,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2779 transitions. [2023-08-27 08:58:34,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26398784079034865 [2023-08-27 08:58:34,508 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2779 transitions. [2023-08-27 08:58:34,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2779 transitions. [2023-08-27 08:58:34,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:58:34,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2779 transitions. [2023-08-27 08:58:34,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 95.82758620689656) internal successors, (2779), 29 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:34,514 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 363.0) internal successors, (10890), 30 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:34,515 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 363.0) internal successors, (10890), 30 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:34,515 INFO L175 Difference]: Start difference. First operand has 418 places, 790 transitions, 16956 flow. Second operand 29 states and 2779 transitions. [2023-08-27 08:58:34,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 899 transitions, 19916 flow [2023-08-27 08:58:35,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 899 transitions, 19650 flow, removed 36 selfloop flow, removed 28 redundant places. [2023-08-27 08:58:35,407 INFO L231 Difference]: Finished difference. Result has 424 places, 817 transitions, 17669 flow [2023-08-27 08:58:35,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=16690, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=790, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=687, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=17669, PETRI_PLACES=424, PETRI_TRANSITIONS=817} [2023-08-27 08:58:35,408 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 401 predicate places. [2023-08-27 08:58:35,408 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 817 transitions, 17669 flow [2023-08-27 08:58:35,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 91.72413793103448) internal successors, (2660), 29 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:35,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:58:35,409 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:58:35,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-27 08:58:35,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:58:35,614 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:58:35,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:58:35,615 INFO L85 PathProgramCache]: Analyzing trace with hash 791542566, now seen corresponding path program 10 times [2023-08-27 08:58:35,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:58:35,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492476845] [2023-08-27 08:58:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:58:35,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:58:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:58:36,384 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:58:36,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:58:36,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492476845] [2023-08-27 08:58:36,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492476845] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:58:36,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258680091] [2023-08-27 08:58:36,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:58:36,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:58:36,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:58:36,386 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 08:58:36,386 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 08:58:36,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:58:36,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:58:36,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 08:58:36,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:58:36,749 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:58:36,749 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 22 [2023-08-27 08:58:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:58:36,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:58:37,160 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 08:58:37,161 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-27 08:58:37,257 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 08:58:37,257 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 08:58:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:37,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258680091] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:58:37,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:58:37,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 26 [2023-08-27 08:58:37,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881811480] [2023-08-27 08:58:37,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:58:37,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:58:37,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:58:37,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:58:37,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-08-27 08:58:37,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 08:58:37,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 817 transitions, 17669 flow. Second operand has 28 states, 28 states have (on average 91.78571428571429) internal successors, (2570), 28 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:37,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:58:37,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 08:58:37,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:58:40,882 INFO L124 PetriNetUnfolderBase]: 2718/5104 cut-off events. [2023-08-27 08:58:40,882 INFO L125 PetriNetUnfolderBase]: For 218096/218096 co-relation queries the response was YES. [2023-08-27 08:58:40,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51205 conditions, 5104 events. 2718/5104 cut-off events. For 218096/218096 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 36891 event pairs, 458 based on Foata normal form. 6/5109 useless extension candidates. Maximal degree in co-relation 51079. Up to 4688 conditions per place. [2023-08-27 08:58:40,943 INFO L140 encePairwiseOnDemand]: 351/363 looper letters, 833 selfloop transitions, 131 changer transitions 12/976 dead transitions. [2023-08-27 08:58:40,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 976 transitions, 21703 flow [2023-08-27 08:58:40,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-08-27 08:58:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-08-27 08:58:40,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 3730 transitions. [2023-08-27 08:58:40,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2634738998375362 [2023-08-27 08:58:40,946 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 3730 transitions. [2023-08-27 08:58:40,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 3730 transitions. [2023-08-27 08:58:40,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:58:40,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 3730 transitions. [2023-08-27 08:58:40,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 95.64102564102564) internal successors, (3730), 39 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:40,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 363.0) internal successors, (14520), 40 states have internal predecessors, (14520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:40,954 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 363.0) internal successors, (14520), 40 states have internal predecessors, (14520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:40,954 INFO L175 Difference]: Start difference. First operand has 424 places, 817 transitions, 17669 flow. Second operand 39 states and 3730 transitions. [2023-08-27 08:58:40,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 976 transitions, 21703 flow [2023-08-27 08:58:41,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 976 transitions, 21387 flow, removed 107 selfloop flow, removed 16 redundant places. [2023-08-27 08:58:41,916 INFO L231 Difference]: Finished difference. Result has 460 places, 872 transitions, 19193 flow [2023-08-27 08:58:41,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=17360, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=817, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=712, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=19193, PETRI_PLACES=460, PETRI_TRANSITIONS=872} [2023-08-27 08:58:41,917 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 437 predicate places. [2023-08-27 08:58:41,917 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 872 transitions, 19193 flow [2023-08-27 08:58:41,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 91.78571428571429) internal successors, (2570), 28 states have internal predecessors, (2570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:41,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:58:41,917 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:58:41,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-08-27 08:58:42,122 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,SelfDestructingSolverStorable41 [2023-08-27 08:58:42,123 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:58:42,123 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:58:42,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1339704400, now seen corresponding path program 11 times [2023-08-27 08:58:42,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:58:42,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502067770] [2023-08-27 08:58:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:58:42,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:58:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:58:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:58:42,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:58:42,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502067770] [2023-08-27 08:58:42,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502067770] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:58:42,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768193864] [2023-08-27 08:58:42,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:58:42,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:58:42,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:58:42,886 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 08:58:42,888 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 08:58:43,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 08:58:43,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:58:43,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 08:58:43,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:58:43,246 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:58:43,280 INFO L322 Elim1Store]: treesize reduction 49, result has 40.2 percent of original size [2023-08-27 08:58:43,280 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 184 treesize of output 143 [2023-08-27 08:58:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:43,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:58:43,817 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:58:43,817 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 155 treesize of output 180 [2023-08-27 08:58:44,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:44,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768193864] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:58:44,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:58:44,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 8] total 26 [2023-08-27 08:58:44,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091742161] [2023-08-27 08:58:44,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:58:44,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:58:44,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:58:44,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:58:44,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2023-08-27 08:58:44,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 08:58:44,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 872 transitions, 19193 flow. Second operand has 28 states, 28 states have (on average 91.67857142857143) internal successors, (2567), 28 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:44,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:58:44,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 08:58:44,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:58:46,678 INFO L124 PetriNetUnfolderBase]: 2744/5157 cut-off events. [2023-08-27 08:58:46,678 INFO L125 PetriNetUnfolderBase]: For 258315/258315 co-relation queries the response was YES. [2023-08-27 08:58:46,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53556 conditions, 5157 events. 2744/5157 cut-off events. For 258315/258315 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 37407 event pairs, 458 based on Foata normal form. 3/5159 useless extension candidates. Maximal degree in co-relation 53415. Up to 4751 conditions per place. [2023-08-27 08:58:46,740 INFO L140 encePairwiseOnDemand]: 353/363 looper letters, 833 selfloop transitions, 116 changer transitions 11/960 dead transitions. [2023-08-27 08:58:46,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 960 transitions, 22090 flow [2023-08-27 08:58:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-27 08:58:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-27 08:58:46,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2861 transitions. [2023-08-27 08:58:46,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26271808999081725 [2023-08-27 08:58:46,743 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2861 transitions. [2023-08-27 08:58:46,743 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2861 transitions. [2023-08-27 08:58:46,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:58:46,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2861 transitions. [2023-08-27 08:58:46,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 95.36666666666666) internal successors, (2861), 30 states have internal predecessors, (2861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:46,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 363.0) internal successors, (11253), 31 states have internal predecessors, (11253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:46,750 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 363.0) internal successors, (11253), 31 states have internal predecessors, (11253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:46,750 INFO L175 Difference]: Start difference. First operand has 460 places, 872 transitions, 19193 flow. Second operand 30 states and 2861 transitions. [2023-08-27 08:58:46,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 960 transitions, 22090 flow [2023-08-27 08:58:47,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 960 transitions, 21547 flow, removed 204 selfloop flow, removed 20 redundant places. [2023-08-27 08:58:47,905 INFO L231 Difference]: Finished difference. Result has 477 places, 888 transitions, 19283 flow [2023-08-27 08:58:47,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=18654, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=872, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=19283, PETRI_PLACES=477, PETRI_TRANSITIONS=888} [2023-08-27 08:58:47,906 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 454 predicate places. [2023-08-27 08:58:47,906 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 888 transitions, 19283 flow [2023-08-27 08:58:47,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 91.67857142857143) internal successors, (2567), 28 states have internal predecessors, (2567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:47,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:58:47,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:58:47,912 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-08-27 08:58:48,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:58:48,112 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:58:48,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:58:48,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1340299046, now seen corresponding path program 12 times [2023-08-27 08:58:48,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:58:48,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824286186] [2023-08-27 08:58:48,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:58:48,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:58:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:58:49,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:58:49,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:58:49,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824286186] [2023-08-27 08:58:49,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824286186] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:58:49,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333125368] [2023-08-27 08:58:49,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:58:49,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:58:49,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:58:49,082 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 08:58:49,083 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 08:58:49,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 08:58:49,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:58:49,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 08:58:49,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:58:49,428 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:58:49,428 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-08-27 08:58:49,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:58:49,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:58:49,817 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 08:58:49,817 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-27 08:58:49,917 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 08:58:49,917 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 08:58:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:50,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333125368] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:58:50,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:58:50,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-08-27 08:58:50,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224901098] [2023-08-27 08:58:50,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:58:50,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 08:58:50,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:58:50,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 08:58:50,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2023-08-27 08:58:50,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 08:58:50,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 888 transitions, 19283 flow. Second operand has 28 states, 28 states have (on average 91.71428571428571) internal successors, (2568), 28 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:50,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:58:50,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 08:58:50,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:58:53,044 INFO L124 PetriNetUnfolderBase]: 2890/5430 cut-off events. [2023-08-27 08:58:53,044 INFO L125 PetriNetUnfolderBase]: For 292943/292943 co-relation queries the response was YES. [2023-08-27 08:58:53,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56530 conditions, 5430 events. 2890/5430 cut-off events. For 292943/292943 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 39751 event pairs, 464 based on Foata normal form. 4/5433 useless extension candidates. Maximal degree in co-relation 56382. Up to 4822 conditions per place. [2023-08-27 08:58:53,110 INFO L140 encePairwiseOnDemand]: 353/363 looper letters, 885 selfloop transitions, 135 changer transitions 9/1029 dead transitions. [2023-08-27 08:58:53,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 1029 transitions, 23304 flow [2023-08-27 08:58:53,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 08:58:53,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 08:58:53,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3061 transitions. [2023-08-27 08:58:53,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26351584022038566 [2023-08-27 08:58:53,113 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3061 transitions. [2023-08-27 08:58:53,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3061 transitions. [2023-08-27 08:58:53,113 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:58:53,113 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3061 transitions. [2023-08-27 08:58:53,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 95.65625) internal successors, (3061), 32 states have internal predecessors, (3061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:53,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 363.0) internal successors, (11979), 33 states have internal predecessors, (11979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:53,120 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 363.0) internal successors, (11979), 33 states have internal predecessors, (11979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:53,123 INFO L175 Difference]: Start difference. First operand has 477 places, 888 transitions, 19283 flow. Second operand 32 states and 3061 transitions. [2023-08-27 08:58:53,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 1029 transitions, 23304 flow [2023-08-27 08:58:54,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 1029 transitions, 23123 flow, removed 34 selfloop flow, removed 20 redundant places. [2023-08-27 08:58:54,323 INFO L231 Difference]: Finished difference. Result has 495 places, 920 transitions, 20178 flow [2023-08-27 08:58:54,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=19114, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=888, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=755, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=20178, PETRI_PLACES=495, PETRI_TRANSITIONS=920} [2023-08-27 08:58:54,325 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 472 predicate places. [2023-08-27 08:58:54,325 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 920 transitions, 20178 flow [2023-08-27 08:58:54,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 91.71428571428571) internal successors, (2568), 28 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:54,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:58:54,325 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:58:54,334 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 08:58:54,530 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,SelfDestructingSolverStorable43 [2023-08-27 08:58:54,531 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:58:54,531 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:58:54,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1358733072, now seen corresponding path program 13 times [2023-08-27 08:58:54,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:58:54,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339308143] [2023-08-27 08:58:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:58:54,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:58:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:58:55,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:58:55,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:58:55,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339308143] [2023-08-27 08:58:55,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339308143] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:58:55,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371005871] [2023-08-27 08:58:55,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:58:55,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:58:55,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:58:55,211 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 08:58:55,213 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 08:58:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:58:55,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 08:58:55,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:58:55,588 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:58:55,588 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-08-27 08:58:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:55,690 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:58:56,017 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 08:58:56,017 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-27 08:58:56,111 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 08:58:56,112 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 08:58:56,214 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:58:56,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371005871] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:58:56,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:58:56,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 7] total 25 [2023-08-27 08:58:56,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092222360] [2023-08-27 08:58:56,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:58:56,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-27 08:58:56,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:58:56,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-27 08:58:56,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2023-08-27 08:58:56,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 08:58:56,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 920 transitions, 20178 flow. Second operand has 27 states, 27 states have (on average 91.74074074074075) internal successors, (2477), 27 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:56,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:58:56,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 08:58:56,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:58:59,081 INFO L124 PetriNetUnfolderBase]: 3109/5805 cut-off events. [2023-08-27 08:58:59,081 INFO L125 PetriNetUnfolderBase]: For 337707/337707 co-relation queries the response was YES. [2023-08-27 08:58:59,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61409 conditions, 5805 events. 3109/5805 cut-off events. For 337707/337707 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 42985 event pairs, 470 based on Foata normal form. 3/5807 useless extension candidates. Maximal degree in co-relation 61253. Up to 4956 conditions per place. [2023-08-27 08:58:59,166 INFO L140 encePairwiseOnDemand]: 353/363 looper letters, 898 selfloop transitions, 202 changer transitions 6/1106 dead transitions. [2023-08-27 08:58:59,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 1106 transitions, 25287 flow [2023-08-27 08:58:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 08:58:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 08:58:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2778 transitions. [2023-08-27 08:58:59,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2638928469649473 [2023-08-27 08:58:59,169 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2778 transitions. [2023-08-27 08:58:59,169 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2778 transitions. [2023-08-27 08:58:59,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:58:59,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2778 transitions. [2023-08-27 08:58:59,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 95.79310344827586) internal successors, (2778), 29 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:59,175 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 363.0) internal successors, (10890), 30 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:59,175 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 363.0) internal successors, (10890), 30 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:58:59,175 INFO L175 Difference]: Start difference. First operand has 495 places, 920 transitions, 20178 flow. Second operand 29 states and 2778 transitions. [2023-08-27 08:58:59,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 1106 transitions, 25287 flow [2023-08-27 08:59:00,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 1106 transitions, 25081 flow, removed 38 selfloop flow, removed 20 redundant places. [2023-08-27 08:59:00,846 INFO L231 Difference]: Finished difference. Result has 510 places, 991 transitions, 22423 flow [2023-08-27 08:59:00,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=19984, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=920, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=732, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=22423, PETRI_PLACES=510, PETRI_TRANSITIONS=991} [2023-08-27 08:59:00,847 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 487 predicate places. [2023-08-27 08:59:00,847 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 991 transitions, 22423 flow [2023-08-27 08:59:00,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 91.74074074074075) internal successors, (2477), 27 states have internal predecessors, (2477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:00,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:59:00,847 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:59:00,852 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 08:59:01,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:59:01,052 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:59:01,053 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:59:01,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1186346612, now seen corresponding path program 12 times [2023-08-27 08:59:01,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:59:01,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874642373] [2023-08-27 08:59:01,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:59:01,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:59:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:59:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:59:01,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:59:01,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874642373] [2023-08-27 08:59:01,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874642373] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:59:01,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594271084] [2023-08-27 08:59:01,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:59:01,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:59:01,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:59:01,309 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 08:59:01,311 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 08:59:01,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 08:59:01,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:59:01,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 08:59:01,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:59:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:59:01,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:59:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:59:01,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594271084] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:59:01,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:59:01,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-08-27 08:59:01,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764050045] [2023-08-27 08:59:01,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:59:01,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 08:59:01,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:59:01,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 08:59:01,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:59:01,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:59:01,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 991 transitions, 22423 flow. Second operand has 15 states, 15 states have (on average 139.93333333333334) internal successors, (2099), 15 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:01,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:59:01,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:59:01,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:59:05,971 INFO L124 PetriNetUnfolderBase]: 3150/5897 cut-off events. [2023-08-27 08:59:05,972 INFO L125 PetriNetUnfolderBase]: For 357500/357500 co-relation queries the response was YES. [2023-08-27 08:59:06,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63283 conditions, 5897 events. 3150/5897 cut-off events. For 357500/357500 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 44040 event pairs, 522 based on Foata normal form. 32/5928 useless extension candidates. Maximal degree in co-relation 63119. Up to 2637 conditions per place. [2023-08-27 08:59:06,065 INFO L140 encePairwiseOnDemand]: 356/363 looper letters, 676 selfloop transitions, 429 changer transitions 2/1107 dead transitions. [2023-08-27 08:59:06,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 1107 transitions, 25603 flow [2023-08-27 08:59:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-27 08:59:06,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-27 08:59:06,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 5015 transitions. [2023-08-27 08:59:06,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39472648563557655 [2023-08-27 08:59:06,069 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 5015 transitions. [2023-08-27 08:59:06,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 5015 transitions. [2023-08-27 08:59:06,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:59:06,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 5015 transitions. [2023-08-27 08:59:06,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 143.28571428571428) internal successors, (5015), 35 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:06,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 363.0) internal successors, (13068), 36 states have internal predecessors, (13068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:06,077 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 363.0) internal successors, (13068), 36 states have internal predecessors, (13068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:06,077 INFO L175 Difference]: Start difference. First operand has 510 places, 991 transitions, 22423 flow. Second operand 35 states and 5015 transitions. [2023-08-27 08:59:06,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 1107 transitions, 25603 flow [2023-08-27 08:59:07,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 1107 transitions, 25046 flow, removed 221 selfloop flow, removed 17 redundant places. [2023-08-27 08:59:07,932 INFO L231 Difference]: Finished difference. Result has 528 places, 1002 transitions, 23150 flow [2023-08-27 08:59:07,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=21966, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=991, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=419, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=23150, PETRI_PLACES=528, PETRI_TRANSITIONS=1002} [2023-08-27 08:59:07,933 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 505 predicate places. [2023-08-27 08:59:07,934 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 1002 transitions, 23150 flow [2023-08-27 08:59:07,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 139.93333333333334) internal successors, (2099), 15 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:07,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:59:07,934 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:59:07,942 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 08:59:08,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-08-27 08:59:08,140 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:59:08,140 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:59:08,140 INFO L85 PathProgramCache]: Analyzing trace with hash 790688658, now seen corresponding path program 13 times [2023-08-27 08:59:08,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:59:08,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305816590] [2023-08-27 08:59:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:59:08,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:59:08,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:59:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:59:08,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:59:08,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305816590] [2023-08-27 08:59:08,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305816590] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:59:08,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000635324] [2023-08-27 08:59:08,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:59:08,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:59:08,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:59:08,311 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 08:59:08,311 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 08:59:08,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:59:08,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 08:59:08,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:59:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:59:08,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:59:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:59:08,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000635324] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:59:08,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:59:08,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-08-27 08:59:08,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794295123] [2023-08-27 08:59:08,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:59:08,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-27 08:59:08,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:59:08,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-27 08:59:08,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2023-08-27 08:59:08,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:59:08,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 1002 transitions, 23150 flow. Second operand has 15 states, 15 states have (on average 139.93333333333334) internal successors, (2099), 15 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:08,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:59:08,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:59:08,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:59:12,471 INFO L124 PetriNetUnfolderBase]: 3290/6141 cut-off events. [2023-08-27 08:59:12,471 INFO L125 PetriNetUnfolderBase]: For 332762/332762 co-relation queries the response was YES. [2023-08-27 08:59:12,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65510 conditions, 6141 events. 3290/6141 cut-off events. For 332762/332762 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 46036 event pairs, 524 based on Foata normal form. 40/6180 useless extension candidates. Maximal degree in co-relation 65347. Up to 2647 conditions per place. [2023-08-27 08:59:12,561 INFO L140 encePairwiseOnDemand]: 356/363 looper letters, 672 selfloop transitions, 471 changer transitions 2/1145 dead transitions. [2023-08-27 08:59:12,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 1145 transitions, 26985 flow [2023-08-27 08:59:12,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 08:59:12,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 08:59:12,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 4888 transitions. [2023-08-27 08:59:12,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3960460217144709 [2023-08-27 08:59:12,577 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 4888 transitions. [2023-08-27 08:59:12,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 4888 transitions. [2023-08-27 08:59:12,578 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:59:12,578 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 4888 transitions. [2023-08-27 08:59:12,592 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 143.76470588235293) internal successors, (4888), 34 states have internal predecessors, (4888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:12,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 363.0) internal successors, (12705), 35 states have internal predecessors, (12705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:12,597 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 363.0) internal successors, (12705), 35 states have internal predecessors, (12705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:12,597 INFO L175 Difference]: Start difference. First operand has 528 places, 1002 transitions, 23150 flow. Second operand 34 states and 4888 transitions. [2023-08-27 08:59:12,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 1145 transitions, 26985 flow [2023-08-27 08:59:14,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 1145 transitions, 26006 flow, removed 116 selfloop flow, removed 24 redundant places. [2023-08-27 08:59:14,588 INFO L231 Difference]: Finished difference. Result has 539 places, 1045 transitions, 24214 flow [2023-08-27 08:59:14,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=22174, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=998, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=431, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=24214, PETRI_PLACES=539, PETRI_TRANSITIONS=1045} [2023-08-27 08:59:14,589 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 516 predicate places. [2023-08-27 08:59:14,589 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 1045 transitions, 24214 flow [2023-08-27 08:59:14,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 139.93333333333334) internal successors, (2099), 15 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:14,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:59:14,590 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:59:14,595 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-08-27 08:59:14,795 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,SelfDestructingSolverStorable46 [2023-08-27 08:59:14,796 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:59:14,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:59:14,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1335974998, now seen corresponding path program 14 times [2023-08-27 08:59:14,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:59:14,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591929900] [2023-08-27 08:59:14,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:59:14,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:59:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:59:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:59:14,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:59:14,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591929900] [2023-08-27 08:59:14,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591929900] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:59:14,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111189232] [2023-08-27 08:59:14,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 08:59:14,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:59:14,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:59:14,994 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 08:59:14,996 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 08:59:15,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:59:15,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:59:15,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-27 08:59:15,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:59:15,198 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:59:15,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:59:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:59:15,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111189232] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:59:15,292 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:59:15,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 16 [2023-08-27 08:59:15,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348036000] [2023-08-27 08:59:15,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:59:15,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 08:59:15,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:59:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 08:59:15,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2023-08-27 08:59:15,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 08:59:15,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 1045 transitions, 24214 flow. Second operand has 16 states, 16 states have (on average 139.875) internal successors, (2238), 16 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:15,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:59:15,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 08:59:15,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:59:18,286 INFO L124 PetriNetUnfolderBase]: 3477/6422 cut-off events. [2023-08-27 08:59:18,286 INFO L125 PetriNetUnfolderBase]: For 388753/388753 co-relation queries the response was YES. [2023-08-27 08:59:18,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68226 conditions, 6422 events. 3477/6422 cut-off events. For 388753/388753 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 48140 event pairs, 564 based on Foata normal form. 124/6545 useless extension candidates. Maximal degree in co-relation 68068. Up to 2771 conditions per place. [2023-08-27 08:59:18,374 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 865 selfloop transitions, 409 changer transitions 5/1279 dead transitions. [2023-08-27 08:59:18,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 563 places, 1279 transitions, 31305 flow [2023-08-27 08:59:18,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 08:59:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 08:59:18,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3871 transitions. [2023-08-27 08:59:18,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.394959697990001 [2023-08-27 08:59:18,376 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3871 transitions. [2023-08-27 08:59:18,376 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3871 transitions. [2023-08-27 08:59:18,377 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:59:18,377 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3871 transitions. [2023-08-27 08:59:18,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 143.37037037037038) internal successors, (3871), 27 states have internal predecessors, (3871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:18,382 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 363.0) internal successors, (10164), 28 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:18,383 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 363.0) internal successors, (10164), 28 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:18,383 INFO L175 Difference]: Start difference. First operand has 539 places, 1045 transitions, 24214 flow. Second operand 27 states and 3871 transitions. [2023-08-27 08:59:18,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 563 places, 1279 transitions, 31305 flow [2023-08-27 08:59:20,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 1279 transitions, 30339 flow, removed 156 selfloop flow, removed 20 redundant places. [2023-08-27 08:59:20,257 INFO L231 Difference]: Finished difference. Result has 549 places, 1132 transitions, 26562 flow [2023-08-27 08:59:20,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=23156, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1034, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=670, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=26562, PETRI_PLACES=549, PETRI_TRANSITIONS=1132} [2023-08-27 08:59:20,258 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 526 predicate places. [2023-08-27 08:59:20,258 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 1132 transitions, 26562 flow [2023-08-27 08:59:20,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 139.875) internal successors, (2238), 16 states have internal predecessors, (2238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:20,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:59:20,258 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:59:20,264 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 08:59:20,464 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,SelfDestructingSolverStorable47 [2023-08-27 08:59:20,464 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:59:20,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:59:20,464 INFO L85 PathProgramCache]: Analyzing trace with hash 94708780, now seen corresponding path program 15 times [2023-08-27 08:59:20,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:59:20,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589759990] [2023-08-27 08:59:20,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:59:20,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:59:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:59:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:59:21,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:59:21,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589759990] [2023-08-27 08:59:21,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589759990] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:59:21,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604935635] [2023-08-27 08:59:21,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 08:59:21,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:59:21,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:59:21,355 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 08:59:21,357 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 08:59:21,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 08:59:21,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:59:21,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 08:59:21,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:59:21,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:59:21,638 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 08:59:21,811 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:59:21,811 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-08-27 08:59:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:59:21,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:59:22,462 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:59:22,462 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-27 08:59:22,473 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:59:22,474 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-08-27 08:59:22,531 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:59:22,559 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-27 08:59:22,559 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-27 08:59:22,648 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:59:22,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604935635] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:59:22,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:59:22,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-08-27 08:59:22,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541577695] [2023-08-27 08:59:22,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:59:22,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 08:59:22,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:59:22,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 08:59:22,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=918, Unknown=2, NotChecked=0, Total=1056 [2023-08-27 08:59:22,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 363 [2023-08-27 08:59:22,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 1132 transitions, 26562 flow. Second operand has 33 states, 33 states have (on average 94.45454545454545) internal successors, (3117), 33 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:22,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:59:22,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 363 [2023-08-27 08:59:22,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:59:26,292 INFO L124 PetriNetUnfolderBase]: 3559/6587 cut-off events. [2023-08-27 08:59:26,292 INFO L125 PetriNetUnfolderBase]: For 352098/352098 co-relation queries the response was YES. [2023-08-27 08:59:26,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70237 conditions, 6587 events. 3559/6587 cut-off events. For 352098/352098 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 49431 event pairs, 477 based on Foata normal form. 10/6596 useless extension candidates. Maximal degree in co-relation 70076. Up to 6137 conditions per place. [2023-08-27 08:59:26,377 INFO L140 encePairwiseOnDemand]: 353/363 looper letters, 1079 selfloop transitions, 141 changer transitions 11/1231 dead transitions. [2023-08-27 08:59:26,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 1231 transitions, 30466 flow [2023-08-27 08:59:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-27 08:59:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-27 08:59:26,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2569 transitions. [2023-08-27 08:59:26,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27219749947022676 [2023-08-27 08:59:26,379 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2569 transitions. [2023-08-27 08:59:26,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2569 transitions. [2023-08-27 08:59:26,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:59:26,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2569 transitions. [2023-08-27 08:59:26,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 98.8076923076923) internal successors, (2569), 26 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:26,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 363.0) internal successors, (9801), 27 states have internal predecessors, (9801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:26,385 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 363.0) internal successors, (9801), 27 states have internal predecessors, (9801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:26,385 INFO L175 Difference]: Start difference. First operand has 549 places, 1132 transitions, 26562 flow. Second operand 26 states and 2569 transitions. [2023-08-27 08:59:26,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 1231 transitions, 30466 flow [2023-08-27 08:59:28,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 1231 transitions, 29571 flow, removed 249 selfloop flow, removed 16 redundant places. [2023-08-27 08:59:28,224 INFO L231 Difference]: Finished difference. Result has 568 places, 1158 transitions, 26899 flow [2023-08-27 08:59:28,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=25715, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=997, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=26899, PETRI_PLACES=568, PETRI_TRANSITIONS=1158} [2023-08-27 08:59:28,225 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 545 predicate places. [2023-08-27 08:59:28,225 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 1158 transitions, 26899 flow [2023-08-27 08:59:28,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 94.45454545454545) internal successors, (3117), 33 states have internal predecessors, (3117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:28,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:59:28,226 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:59:28,233 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 08:59:28,431 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,SelfDestructingSolverStorable48 [2023-08-27 08:59:28,431 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:59:28,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:59:28,431 INFO L85 PathProgramCache]: Analyzing trace with hash -745223528, now seen corresponding path program 16 times [2023-08-27 08:59:28,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:59:28,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135553466] [2023-08-27 08:59:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:59:28,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:59:28,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:59:28,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:59:28,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:59:28,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135553466] [2023-08-27 08:59:28,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135553466] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:59:28,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468470215] [2023-08-27 08:59:28,923 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 08:59:28,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:59:28,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:59:28,933 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 08:59:28,935 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 08:59:29,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 08:59:29,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:59:29,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 08:59:29,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:59:29,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:59:29,152 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 08:59:29,304 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:59:29,305 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 78 [2023-08-27 08:59:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:59:29,372 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:59:29,772 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:59:29,772 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-27 08:59:29,787 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:59:29,787 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 60 [2023-08-27 08:59:29,853 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:59:29,883 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-27 08:59:29,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-27 08:59:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:59:29,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468470215] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:59:29,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:59:29,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-08-27 08:59:29,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008109988] [2023-08-27 08:59:29,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:59:29,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 08:59:29,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:59:29,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 08:59:29,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=859, Unknown=1, NotChecked=0, Total=992 [2023-08-27 08:59:29,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 363 [2023-08-27 08:59:29,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 1158 transitions, 26899 flow. Second operand has 32 states, 32 states have (on average 94.5) internal successors, (3024), 32 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:29,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:59:29,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 363 [2023-08-27 08:59:29,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:59:33,279 INFO L124 PetriNetUnfolderBase]: 3562/6579 cut-off events. [2023-08-27 08:59:33,280 INFO L125 PetriNetUnfolderBase]: For 333054/333054 co-relation queries the response was YES. [2023-08-27 08:59:33,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69509 conditions, 6579 events. 3562/6579 cut-off events. For 333054/333054 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 49266 event pairs, 515 based on Foata normal form. 1/6579 useless extension candidates. Maximal degree in co-relation 69339. Up to 6270 conditions per place. [2023-08-27 08:59:33,377 INFO L140 encePairwiseOnDemand]: 353/363 looper letters, 1078 selfloop transitions, 131 changer transitions 6/1215 dead transitions. [2023-08-27 08:59:33,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 597 places, 1215 transitions, 29765 flow [2023-08-27 08:59:33,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 08:59:33,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 08:59:33,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3214 transitions. [2023-08-27 08:59:33,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2683028633441857 [2023-08-27 08:59:33,388 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3214 transitions. [2023-08-27 08:59:33,388 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3214 transitions. [2023-08-27 08:59:33,388 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:59:33,388 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3214 transitions. [2023-08-27 08:59:33,390 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 97.39393939393939) internal successors, (3214), 33 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:33,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 363.0) internal successors, (12342), 34 states have internal predecessors, (12342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:33,395 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 363.0) internal successors, (12342), 34 states have internal predecessors, (12342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:33,395 INFO L175 Difference]: Start difference. First operand has 568 places, 1158 transitions, 26899 flow. Second operand 33 states and 3214 transitions. [2023-08-27 08:59:33,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 597 places, 1215 transitions, 29765 flow [2023-08-27 08:59:35,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 583 places, 1215 transitions, 29333 flow, removed 133 selfloop flow, removed 14 redundant places. [2023-08-27 08:59:35,323 INFO L231 Difference]: Finished difference. Result has 586 places, 1163 transitions, 26872 flow [2023-08-27 08:59:35,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=26471, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1031, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=26872, PETRI_PLACES=586, PETRI_TRANSITIONS=1163} [2023-08-27 08:59:35,323 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 563 predicate places. [2023-08-27 08:59:35,324 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 1163 transitions, 26872 flow [2023-08-27 08:59:35,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 94.5) internal successors, (3024), 32 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:35,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:59:35,324 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:59:35,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-27 08:59:35,529 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,SelfDestructingSolverStorable49 [2023-08-27 08:59:35,529 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:59:35,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:59:35,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1657074900, now seen corresponding path program 17 times [2023-08-27 08:59:35,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:59:35,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652912057] [2023-08-27 08:59:35,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:59:35,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:59:35,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:59:36,265 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:59:36,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:59:36,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652912057] [2023-08-27 08:59:36,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652912057] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:59:36,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572419825] [2023-08-27 08:59:36,266 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 08:59:36,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:59:36,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:59:36,267 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 08:59:36,269 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 08:59:36,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 08:59:36,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:59:36,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 08:59:36,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:59:36,659 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:59:36,673 INFO L322 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2023-08-27 08:59:36,673 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 31 [2023-08-27 08:59:36,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:59:36,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:59:37,116 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 08:59:37,116 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-27 08:59:37,213 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 08:59:37,213 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 08:59:37,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:59:37,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572419825] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:59:37,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:59:37,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 8] total 28 [2023-08-27 08:59:37,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188499220] [2023-08-27 08:59:37,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:59:37,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 08:59:37,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:59:37,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 08:59:37,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2023-08-27 08:59:37,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 08:59:37,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 1163 transitions, 26872 flow. Second operand has 30 states, 30 states have (on average 91.66666666666667) internal successors, (2750), 30 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:37,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:59:37,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 08:59:37,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:59:41,672 INFO L124 PetriNetUnfolderBase]: 3634/6707 cut-off events. [2023-08-27 08:59:41,673 INFO L125 PetriNetUnfolderBase]: For 339220/339220 co-relation queries the response was YES. [2023-08-27 08:59:41,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70729 conditions, 6707 events. 3634/6707 cut-off events. For 339220/339220 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 50152 event pairs, 552 based on Foata normal form. 5/6711 useless extension candidates. Maximal degree in co-relation 70557. Up to 6307 conditions per place. [2023-08-27 08:59:41,773 INFO L140 encePairwiseOnDemand]: 351/363 looper letters, 1139 selfloop transitions, 121 changer transitions 11/1271 dead transitions. [2023-08-27 08:59:41,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 615 places, 1271 transitions, 30841 flow [2023-08-27 08:59:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 08:59:41,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 08:59:41,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2966 transitions. [2023-08-27 08:59:41,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2635741580023105 [2023-08-27 08:59:41,775 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2966 transitions. [2023-08-27 08:59:41,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2966 transitions. [2023-08-27 08:59:41,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:59:41,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2966 transitions. [2023-08-27 08:59:41,777 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 95.6774193548387) internal successors, (2966), 31 states have internal predecessors, (2966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:41,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 363.0) internal successors, (11616), 32 states have internal predecessors, (11616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:41,782 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 363.0) internal successors, (11616), 32 states have internal predecessors, (11616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:41,782 INFO L175 Difference]: Start difference. First operand has 586 places, 1163 transitions, 26872 flow. Second operand 31 states and 2966 transitions. [2023-08-27 08:59:41,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 615 places, 1271 transitions, 30841 flow [2023-08-27 08:59:43,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 591 places, 1271 transitions, 30587 flow, removed 10 selfloop flow, removed 24 redundant places. [2023-08-27 08:59:43,879 INFO L231 Difference]: Finished difference. Result has 602 places, 1192 transitions, 27840 flow [2023-08-27 08:59:43,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=26640, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1051, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=27840, PETRI_PLACES=602, PETRI_TRANSITIONS=1192} [2023-08-27 08:59:43,879 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 579 predicate places. [2023-08-27 08:59:43,879 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 1192 transitions, 27840 flow [2023-08-27 08:59:43,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 91.66666666666667) internal successors, (2750), 30 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:43,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:59:43,880 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:59:43,885 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 08:59:44,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:59:44,085 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:59:44,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:59:44,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1171786658, now seen corresponding path program 18 times [2023-08-27 08:59:44,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:59:44,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346754593] [2023-08-27 08:59:44,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:59:44,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:59:44,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:59:44,573 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:59:44,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:59:44,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346754593] [2023-08-27 08:59:44,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346754593] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:59:44,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332453726] [2023-08-27 08:59:44,574 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 08:59:44,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:59:44,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:59:44,577 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 08:59:44,582 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 08:59:44,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 08:59:44,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 08:59:44,726 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 08:59:44,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:59:44,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:59:44,838 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 08:59:44,959 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:59:44,959 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-27 08:59:44,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:59:44,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:59:45,375 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:59:45,375 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-27 08:59:45,391 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:59:45,392 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-08-27 08:59:45,480 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 08:59:45,511 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-27 08:59:45,511 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-27 08:59:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:59:45,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332453726] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:59:45,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:59:45,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 28 [2023-08-27 08:59:45,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458852351] [2023-08-27 08:59:45,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:59:45,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 08:59:45,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:59:45,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 08:59:45,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=757, Unknown=1, NotChecked=0, Total=870 [2023-08-27 08:59:45,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 363 [2023-08-27 08:59:45,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 1192 transitions, 27840 flow. Second operand has 30 states, 30 states have (on average 99.53333333333333) internal successors, (2986), 30 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:45,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:59:45,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 363 [2023-08-27 08:59:45,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:59:49,566 INFO L124 PetriNetUnfolderBase]: 3636/6710 cut-off events. [2023-08-27 08:59:49,567 INFO L125 PetriNetUnfolderBase]: For 356124/356124 co-relation queries the response was YES. [2023-08-27 08:59:49,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71763 conditions, 6710 events. 3636/6710 cut-off events. For 356124/356124 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 50267 event pairs, 415 based on Foata normal form. 5/6714 useless extension candidates. Maximal degree in co-relation 71582. Up to 5770 conditions per place. [2023-08-27 08:59:49,667 INFO L140 encePairwiseOnDemand]: 352/363 looper letters, 975 selfloop transitions, 287 changer transitions 16/1278 dead transitions. [2023-08-27 08:59:49,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 1278 transitions, 31414 flow [2023-08-27 08:59:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-27 08:59:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-27 08:59:49,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2501 transitions. [2023-08-27 08:59:49,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2870752984389348 [2023-08-27 08:59:49,669 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2501 transitions. [2023-08-27 08:59:49,669 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2501 transitions. [2023-08-27 08:59:49,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:59:49,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2501 transitions. [2023-08-27 08:59:49,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 104.20833333333333) internal successors, (2501), 24 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:49,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 363.0) internal successors, (9075), 25 states have internal predecessors, (9075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:49,674 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 363.0) internal successors, (9075), 25 states have internal predecessors, (9075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:49,674 INFO L175 Difference]: Start difference. First operand has 602 places, 1192 transitions, 27840 flow. Second operand 24 states and 2501 transitions. [2023-08-27 08:59:49,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 1278 transitions, 31414 flow [2023-08-27 08:59:51,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 1278 transitions, 30907 flow, removed 178 selfloop flow, removed 16 redundant places. [2023-08-27 08:59:51,742 INFO L231 Difference]: Finished difference. Result has 615 places, 1201 transitions, 28362 flow [2023-08-27 08:59:51,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=27337, PETRI_DIFFERENCE_MINUEND_PLACES=586, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=905, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=28362, PETRI_PLACES=615, PETRI_TRANSITIONS=1201} [2023-08-27 08:59:51,743 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 592 predicate places. [2023-08-27 08:59:51,743 INFO L495 AbstractCegarLoop]: Abstraction has has 615 places, 1201 transitions, 28362 flow [2023-08-27 08:59:51,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 99.53333333333333) internal successors, (2986), 30 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:51,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 08:59:51,744 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 08:59:51,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-08-27 08:59:51,949 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,SelfDestructingSolverStorable51 [2023-08-27 08:59:51,949 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 08:59:51,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 08:59:51,949 INFO L85 PathProgramCache]: Analyzing trace with hash -665609934, now seen corresponding path program 19 times [2023-08-27 08:59:51,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 08:59:51,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662440257] [2023-08-27 08:59:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 08:59:51,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 08:59:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:59:52,761 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 08:59:52,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 08:59:52,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662440257] [2023-08-27 08:59:52,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662440257] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 08:59:52,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489063873] [2023-08-27 08:59:52,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 08:59:52,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 08:59:52,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 08:59:52,762 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 08:59:52,764 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 08:59:52,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 08:59:52,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 08:59:52,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 08:59:53,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 08:59:53,012 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-27 08:59:53,153 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:59:53,153 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-27 08:59:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 08:59:53,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 08:59:53,617 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:59:53,617 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 131 treesize of output 195 [2023-08-27 08:59:53,643 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:59:53,643 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2023-08-27 08:59:53,873 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:59:53,873 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-27 08:59:53,886 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 08:59:53,886 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-08-27 08:59:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 08:59:54,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489063873] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 08:59:54,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 08:59:54,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-08-27 08:59:54,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423635763] [2023-08-27 08:59:54,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 08:59:54,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 08:59:54,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 08:59:54,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 08:59:54,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=945, Unknown=1, NotChecked=0, Total=1056 [2023-08-27 08:59:54,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 08:59:54,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 615 places, 1201 transitions, 28362 flow. Second operand has 33 states, 33 states have (on average 91.57575757575758) internal successors, (3022), 33 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:54,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 08:59:54,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 08:59:54,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 08:59:59,247 INFO L124 PetriNetUnfolderBase]: 3705/6841 cut-off events. [2023-08-27 08:59:59,247 INFO L125 PetriNetUnfolderBase]: For 376748/376748 co-relation queries the response was YES. [2023-08-27 08:59:59,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74227 conditions, 6841 events. 3705/6841 cut-off events. For 376748/376748 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 51635 event pairs, 391 based on Foata normal form. 7/6847 useless extension candidates. Maximal degree in co-relation 74042. Up to 5707 conditions per place. [2023-08-27 08:59:59,344 INFO L140 encePairwiseOnDemand]: 351/363 looper letters, 984 selfloop transitions, 327 changer transitions 16/1327 dead transitions. [2023-08-27 08:59:59,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 646 places, 1327 transitions, 32682 flow [2023-08-27 08:59:59,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 08:59:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 08:59:59,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3251 transitions. [2023-08-27 08:59:59,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2634094960298169 [2023-08-27 08:59:59,347 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3251 transitions. [2023-08-27 08:59:59,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3251 transitions. [2023-08-27 08:59:59,347 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 08:59:59,347 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3251 transitions. [2023-08-27 08:59:59,349 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 95.61764705882354) internal successors, (3251), 34 states have internal predecessors, (3251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:59,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 363.0) internal successors, (12705), 35 states have internal predecessors, (12705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:59,354 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 363.0) internal successors, (12705), 35 states have internal predecessors, (12705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 08:59:59,354 INFO L175 Difference]: Start difference. First operand has 615 places, 1201 transitions, 28362 flow. Second operand 34 states and 3251 transitions. [2023-08-27 08:59:59,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 646 places, 1327 transitions, 32682 flow [2023-08-27 09:00:01,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 628 places, 1327 transitions, 32135 flow, removed 124 selfloop flow, removed 18 redundant places. [2023-08-27 09:00:01,583 INFO L231 Difference]: Finished difference. Result has 638 places, 1232 transitions, 29677 flow [2023-08-27 09:00:01,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=27871, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=297, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=879, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=29677, PETRI_PLACES=638, PETRI_TRANSITIONS=1232} [2023-08-27 09:00:01,583 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 615 predicate places. [2023-08-27 09:00:01,584 INFO L495 AbstractCegarLoop]: Abstraction has has 638 places, 1232 transitions, 29677 flow [2023-08-27 09:00:01,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 91.57575757575758) internal successors, (3022), 33 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:01,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:00:01,584 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:00:01,591 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 09:00:01,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:00:01,789 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:00:01,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:00:01,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1555533054, now seen corresponding path program 20 times [2023-08-27 09:00:01,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:00:01,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971974960] [2023-08-27 09:00:01,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:00:01,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:00:01,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:00:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:00:02,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:00:02,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971974960] [2023-08-27 09:00:02,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971974960] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:00:02,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364929873] [2023-08-27 09:00:02,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:00:02,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:00:02,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:00:02,459 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 09:00:02,460 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 09:00:02,607 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:00:02,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:00:02,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 09:00:02,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:00:02,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 09:00:02,714 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 09:00:02,875 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:00:02,875 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-27 09:00:02,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:00:02,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:00:03,315 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:00:03,315 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-27 09:00:03,329 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:00:03,329 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-08-27 09:00:03,394 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 09:00:03,421 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-27 09:00:03,421 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-27 09:00:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:00:03,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364929873] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:00:03,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:00:03,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 30 [2023-08-27 09:00:03,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319376201] [2023-08-27 09:00:03,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:00:03,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 09:00:03,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:00:03,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 09:00:03,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=886, Unknown=1, NotChecked=0, Total=992 [2023-08-27 09:00:03,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 09:00:03,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 638 places, 1232 transitions, 29677 flow. Second operand has 32 states, 32 states have (on average 91.46875) internal successors, (2927), 32 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:03,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:00:03,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 09:00:03,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:00:08,118 INFO L124 PetriNetUnfolderBase]: 3735/6885 cut-off events. [2023-08-27 09:00:08,118 INFO L125 PetriNetUnfolderBase]: For 387344/387344 co-relation queries the response was YES. [2023-08-27 09:00:08,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76327 conditions, 6885 events. 3735/6885 cut-off events. For 387344/387344 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 51631 event pairs, 522 based on Foata normal form. 4/6888 useless extension candidates. Maximal degree in co-relation 76134. Up to 6393 conditions per place. [2023-08-27 09:00:08,244 INFO L140 encePairwiseOnDemand]: 352/363 looper letters, 1128 selfloop transitions, 183 changer transitions 8/1319 dead transitions. [2023-08-27 09:00:08,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 669 places, 1319 transitions, 33380 flow [2023-08-27 09:00:08,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 09:00:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 09:00:08,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3144 transitions. [2023-08-27 09:00:08,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26245930378161786 [2023-08-27 09:00:08,247 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3144 transitions. [2023-08-27 09:00:08,247 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3144 transitions. [2023-08-27 09:00:08,247 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:00:08,247 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3144 transitions. [2023-08-27 09:00:08,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 95.27272727272727) internal successors, (3144), 33 states have internal predecessors, (3144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:08,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 363.0) internal successors, (12342), 34 states have internal predecessors, (12342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:08,255 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 363.0) internal successors, (12342), 34 states have internal predecessors, (12342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:08,255 INFO L175 Difference]: Start difference. First operand has 638 places, 1232 transitions, 29677 flow. Second operand 33 states and 3144 transitions. [2023-08-27 09:00:08,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 669 places, 1319 transitions, 33380 flow [2023-08-27 09:00:10,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 648 places, 1319 transitions, 32959 flow, removed 116 selfloop flow, removed 21 redundant places. [2023-08-27 09:00:10,999 INFO L231 Difference]: Finished difference. Result has 656 places, 1248 transitions, 30330 flow [2023-08-27 09:00:11,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=29256, PETRI_DIFFERENCE_MINUEND_PLACES=616, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1050, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=30330, PETRI_PLACES=656, PETRI_TRANSITIONS=1248} [2023-08-27 09:00:11,001 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 633 predicate places. [2023-08-27 09:00:11,001 INFO L495 AbstractCegarLoop]: Abstraction has has 656 places, 1248 transitions, 30330 flow [2023-08-27 09:00:11,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 91.46875) internal successors, (2927), 32 states have internal predecessors, (2927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:11,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:00:11,001 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:00:11,006 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 09:00:11,206 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,SelfDestructingSolverStorable53 [2023-08-27 09:00:11,207 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:00:11,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:00:11,207 INFO L85 PathProgramCache]: Analyzing trace with hash -959460308, now seen corresponding path program 21 times [2023-08-27 09:00:11,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:00:11,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229538955] [2023-08-27 09:00:11,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:00:11,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:00:11,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:00:12,311 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:00:12,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:00:12,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229538955] [2023-08-27 09:00:12,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229538955] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:00:12,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393556107] [2023-08-27 09:00:12,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 09:00:12,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:00:12,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:00:12,312 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 09:00:12,314 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 09:00:12,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 09:00:12,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:00:12,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 42 conjunts are in the unsatisfiable core [2023-08-27 09:00:12,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:00:12,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 09:00:12,616 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 09:00:12,785 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:00:12,786 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-08-27 09:00:12,897 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:00:12,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:00:13,375 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:00:13,375 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 131 treesize of output 195 [2023-08-27 09:00:13,408 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:00:13,408 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 95 [2023-08-27 09:00:13,753 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:00:13,753 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-27 09:00:13,773 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:00:13,774 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 48 [2023-08-27 09:00:13,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:00:13,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393556107] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:00:13,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:00:13,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-08-27 09:00:13,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936022955] [2023-08-27 09:00:13,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:00:13,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 09:00:13,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:00:13,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 09:00:13,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=919, Unknown=1, NotChecked=0, Total=1056 [2023-08-27 09:00:13,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 09:00:13,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 656 places, 1248 transitions, 30330 flow. Second operand has 33 states, 33 states have (on average 91.45454545454545) internal successors, (3018), 33 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:13,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:00:13,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 09:00:13,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:00:19,017 INFO L124 PetriNetUnfolderBase]: 3867/7140 cut-off events. [2023-08-27 09:00:19,018 INFO L125 PetriNetUnfolderBase]: For 413887/413887 co-relation queries the response was YES. [2023-08-27 09:00:19,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79632 conditions, 7140 events. 3867/7140 cut-off events. For 413887/413887 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 54264 event pairs, 413 based on Foata normal form. 10/7149 useless extension candidates. Maximal degree in co-relation 79433. Up to 6044 conditions per place. [2023-08-27 09:00:19,158 INFO L140 encePairwiseOnDemand]: 352/363 looper letters, 1057 selfloop transitions, 331 changer transitions 7/1395 dead transitions. [2023-08-27 09:00:19,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 688 places, 1395 transitions, 35043 flow [2023-08-27 09:00:19,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 09:00:19,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 09:00:19,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3169 transitions. [2023-08-27 09:00:19,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2645462893396778 [2023-08-27 09:00:19,161 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3169 transitions. [2023-08-27 09:00:19,161 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3169 transitions. [2023-08-27 09:00:19,162 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:00:19,162 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3169 transitions. [2023-08-27 09:00:19,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 96.03030303030303) internal successors, (3169), 33 states have internal predecessors, (3169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:19,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 363.0) internal successors, (12342), 34 states have internal predecessors, (12342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:19,168 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 363.0) internal successors, (12342), 34 states have internal predecessors, (12342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:19,168 INFO L175 Difference]: Start difference. First operand has 656 places, 1248 transitions, 30330 flow. Second operand 33 states and 3169 transitions. [2023-08-27 09:00:19,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 688 places, 1395 transitions, 35043 flow [2023-08-27 09:00:22,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 665 places, 1395 transitions, 34550 flow, removed 130 selfloop flow, removed 23 redundant places. [2023-08-27 09:00:22,269 INFO L231 Difference]: Finished difference. Result has 672 places, 1299 transitions, 32006 flow [2023-08-27 09:00:22,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=29844, PETRI_DIFFERENCE_MINUEND_PLACES=633, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=946, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=32006, PETRI_PLACES=672, PETRI_TRANSITIONS=1299} [2023-08-27 09:00:22,270 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 649 predicate places. [2023-08-27 09:00:22,270 INFO L495 AbstractCegarLoop]: Abstraction has has 672 places, 1299 transitions, 32006 flow [2023-08-27 09:00:22,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 91.45454545454545) internal successors, (3018), 33 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:22,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:00:22,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:00:22,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-27 09:00:22,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:00:22,476 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:00:22,477 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:00:22,477 INFO L85 PathProgramCache]: Analyzing trace with hash -744628882, now seen corresponding path program 22 times [2023-08-27 09:00:22,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:00:22,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55921065] [2023-08-27 09:00:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:00:22,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:00:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:00:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:00:23,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:00:23,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55921065] [2023-08-27 09:00:23,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55921065] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:00:23,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210994534] [2023-08-27 09:00:23,197 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 09:00:23,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:00:23,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:00:23,198 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 09:00:23,199 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 09:00:23,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 09:00:23,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:00:23,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-27 09:00:23,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:00:23,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 09:00:23,438 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 09:00:23,583 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:00:23,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 176 treesize of output 122 [2023-08-27 09:00:23,737 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:00:23,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:00:24,189 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:00:24,190 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 114 [2023-08-27 09:00:24,202 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:00:24,202 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 52 [2023-08-27 09:00:24,270 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 09:00:24,294 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-27 09:00:24,294 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-27 09:00:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:00:24,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210994534] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:00:24,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:00:24,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-08-27 09:00:24,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912808697] [2023-08-27 09:00:24,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:00:24,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 09:00:24,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:00:24,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 09:00:24,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=920, Unknown=1, NotChecked=0, Total=1056 [2023-08-27 09:00:24,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 09:00:24,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 672 places, 1299 transitions, 32006 flow. Second operand has 33 states, 33 states have (on average 91.45454545454545) internal successors, (3018), 33 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:24,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:00:24,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 09:00:24,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:00:29,005 INFO L124 PetriNetUnfolderBase]: 3898/7191 cut-off events. [2023-08-27 09:00:29,006 INFO L125 PetriNetUnfolderBase]: For 431901/431901 co-relation queries the response was YES. [2023-08-27 09:00:29,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81169 conditions, 7191 events. 3898/7191 cut-off events. For 431901/431901 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 54370 event pairs, 563 based on Foata normal form. 6/7196 useless extension candidates. Maximal degree in co-relation 80964. Up to 6692 conditions per place. [2023-08-27 09:00:29,128 INFO L140 encePairwiseOnDemand]: 353/363 looper letters, 1185 selfloop transitions, 190 changer transitions 14/1389 dead transitions. [2023-08-27 09:00:29,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 704 places, 1389 transitions, 35940 flow [2023-08-27 09:00:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-27 09:00:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-27 09:00:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3232 transitions. [2023-08-27 09:00:29,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2618700372711068 [2023-08-27 09:00:29,131 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3232 transitions. [2023-08-27 09:00:29,131 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3232 transitions. [2023-08-27 09:00:29,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:00:29,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3232 transitions. [2023-08-27 09:00:29,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 95.05882352941177) internal successors, (3232), 34 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:29,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 363.0) internal successors, (12705), 35 states have internal predecessors, (12705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:29,138 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 363.0) internal successors, (12705), 35 states have internal predecessors, (12705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:29,138 INFO L175 Difference]: Start difference. First operand has 672 places, 1299 transitions, 32006 flow. Second operand 34 states and 3232 transitions. [2023-08-27 09:00:29,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 704 places, 1389 transitions, 35940 flow [2023-08-27 09:00:31,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 682 places, 1389 transitions, 35520 flow, removed 77 selfloop flow, removed 22 redundant places. [2023-08-27 09:00:31,763 INFO L231 Difference]: Finished difference. Result has 688 places, 1318 transitions, 32548 flow [2023-08-27 09:00:31,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=31608, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=32548, PETRI_PLACES=688, PETRI_TRANSITIONS=1318} [2023-08-27 09:00:31,763 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 665 predicate places. [2023-08-27 09:00:31,763 INFO L495 AbstractCegarLoop]: Abstraction has has 688 places, 1318 transitions, 32548 flow [2023-08-27 09:00:31,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 91.45454545454545) internal successors, (3018), 33 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:31,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:00:31,764 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:00:31,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-27 09:00:31,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:00:31,969 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:00:31,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:00:31,970 INFO L85 PathProgramCache]: Analyzing trace with hash -366375626, now seen corresponding path program 23 times [2023-08-27 09:00:31,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:00:31,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473081498] [2023-08-27 09:00:31,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:00:31,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:00:31,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:00:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:00:32,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:00:32,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473081498] [2023-08-27 09:00:32,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473081498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:00:32,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077155722] [2023-08-27 09:00:32,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 09:00:32,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:00:32,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:00:32,901 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 09:00:32,903 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 09:00:33,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:00:33,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:00:33,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 09:00:33,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:00:33,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 09:00:33,253 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 20 [2023-08-27 09:00:33,400 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 09:00:33,414 INFO L322 Elim1Store]: treesize reduction 33, result has 31.3 percent of original size [2023-08-27 09:00:33,414 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 29 treesize of output 31 [2023-08-27 09:00:33,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:00:33,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:00:33,993 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:00:33,994 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 108 [2023-08-27 09:00:34,002 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:00:34,002 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2023-08-27 09:00:34,055 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 09:00:34,086 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-27 09:00:34,087 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-27 09:00:34,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:00:34,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077155722] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:00:34,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:00:34,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-08-27 09:00:34,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477683563] [2023-08-27 09:00:34,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:00:34,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 09:00:34,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:00:34,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 09:00:34,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=953, Unknown=1, NotChecked=0, Total=1056 [2023-08-27 09:00:34,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 09:00:34,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 688 places, 1318 transitions, 32548 flow. Second operand has 33 states, 33 states have (on average 91.51515151515152) internal successors, (3020), 33 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:00:34,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:00:34,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 09:00:34,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:00:43,603 WARN L234 SmtUtils]: Spent 8.15s on a formula simplification. DAG size of input: 57 DAG size of output: 54 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:00:55,778 WARN L234 SmtUtils]: Spent 6.40s on a formula simplification. DAG size of input: 67 DAG size of output: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:01:01,744 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 09:01:04,192 INFO L124 PetriNetUnfolderBase]: 3961/7310 cut-off events. [2023-08-27 09:01:04,192 INFO L125 PetriNetUnfolderBase]: For 436984/436984 co-relation queries the response was YES. [2023-08-27 09:01:04,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82744 conditions, 7310 events. 3961/7310 cut-off events. For 436984/436984 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 55873 event pairs, 337 based on Foata normal form. 10/7319 useless extension candidates. Maximal degree in co-relation 82535. Up to 5707 conditions per place. [2023-08-27 09:01:04,318 INFO L140 encePairwiseOnDemand]: 351/363 looper letters, 1020 selfloop transitions, 428 changer transitions 18/1466 dead transitions. [2023-08-27 09:01:04,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 724 places, 1466 transitions, 37293 flow [2023-08-27 09:01:04,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-27 09:01:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-27 09:01:04,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 3826 transitions. [2023-08-27 09:01:04,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26349862258953166 [2023-08-27 09:01:04,321 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 3826 transitions. [2023-08-27 09:01:04,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 3826 transitions. [2023-08-27 09:01:04,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:01:04,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 3826 transitions. [2023-08-27 09:01:04,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 95.65) internal successors, (3826), 40 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:04,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 363.0) internal successors, (14883), 41 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:04,329 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 363.0) internal successors, (14883), 41 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:04,329 INFO L175 Difference]: Start difference. First operand has 688 places, 1318 transitions, 32548 flow. Second operand 40 states and 3826 transitions. [2023-08-27 09:01:04,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 724 places, 1466 transitions, 37293 flow [2023-08-27 09:01:06,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 698 places, 1466 transitions, 36843 flow, removed 74 selfloop flow, removed 26 redundant places. [2023-08-27 09:01:06,868 INFO L231 Difference]: Finished difference. Result has 707 places, 1345 transitions, 34019 flow [2023-08-27 09:01:06,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=32108, PETRI_DIFFERENCE_MINUEND_PLACES=659, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=904, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=34019, PETRI_PLACES=707, PETRI_TRANSITIONS=1345} [2023-08-27 09:01:06,869 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 684 predicate places. [2023-08-27 09:01:06,869 INFO L495 AbstractCegarLoop]: Abstraction has has 707 places, 1345 transitions, 34019 flow [2023-08-27 09:01:06,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 91.51515151515152) internal successors, (3020), 33 states have internal predecessors, (3020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:06,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:01:06,869 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:01:06,875 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 09:01:07,075 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,SelfDestructingSolverStorable56 [2023-08-27 09:01:07,075 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:01:07,075 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:01:07,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1764024554, now seen corresponding path program 11 times [2023-08-27 09:01:07,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:01:07,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964635327] [2023-08-27 09:01:07,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:01:07,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:01:07,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:01:07,245 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:01:07,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:01:07,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964635327] [2023-08-27 09:01:07,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964635327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:01:07,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907256911] [2023-08-27 09:01:07,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 09:01:07,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:01:07,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:01:07,261 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 09:01:07,263 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 09:01:07,409 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 09:01:07,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:01:07,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 49 conjunts are in the unsatisfiable core [2023-08-27 09:01:07,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:01:07,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 09:01:07,619 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 34 treesize of output 30 [2023-08-27 09:01:07,802 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-27 09:01:07,802 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 40 [2023-08-27 09:01:07,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:01:07,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:01:08,292 INFO L322 Elim1Store]: treesize reduction 5, result has 92.3 percent of original size [2023-08-27 09:01:08,293 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 115 [2023-08-27 09:01:08,302 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 09:01:08,302 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2023-08-27 09:01:08,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:01:08,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907256911] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:01:08,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:01:08,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 11] total 30 [2023-08-27 09:01:08,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186683513] [2023-08-27 09:01:08,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:01:08,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 09:01:08,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:01:08,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 09:01:08,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=743, Unknown=1, NotChecked=0, Total=870 [2023-08-27 09:01:08,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 363 [2023-08-27 09:01:08,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 707 places, 1345 transitions, 34019 flow. Second operand has 30 states, 30 states have (on average 94.86666666666666) internal successors, (2846), 30 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:08,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:01:08,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 363 [2023-08-27 09:01:08,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:01:20,698 INFO L124 PetriNetUnfolderBase]: 4909/9066 cut-off events. [2023-08-27 09:01:20,699 INFO L125 PetriNetUnfolderBase]: For 578258/578258 co-relation queries the response was YES. [2023-08-27 09:01:20,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105862 conditions, 9066 events. 4909/9066 cut-off events. For 578258/578258 co-relation queries the response was YES. Maximal size of possible extension queue 705. Compared 72521 event pairs, 181 based on Foata normal form. 19/9084 useless extension candidates. Maximal degree in co-relation 105647. Up to 1753 conditions per place. [2023-08-27 09:01:20,868 INFO L140 encePairwiseOnDemand]: 350/363 looper letters, 662 selfloop transitions, 1264 changer transitions 28/1954 dead transitions. [2023-08-27 09:01:20,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 773 places, 1954 transitions, 49885 flow [2023-08-27 09:01:20,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-27 09:01:20,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-27 09:01:20,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 6745 transitions. [2023-08-27 09:01:20,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27325392967104195 [2023-08-27 09:01:20,872 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 6745 transitions. [2023-08-27 09:01:20,872 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 6745 transitions. [2023-08-27 09:01:20,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:01:20,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 6745 transitions. [2023-08-27 09:01:20,877 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 99.19117647058823) internal successors, (6745), 68 states have internal predecessors, (6745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:20,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 363.0) internal successors, (25047), 69 states have internal predecessors, (25047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:20,888 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 363.0) internal successors, (25047), 69 states have internal predecessors, (25047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:20,888 INFO L175 Difference]: Start difference. First operand has 707 places, 1345 transitions, 34019 flow. Second operand 68 states and 6745 transitions. [2023-08-27 09:01:20,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 773 places, 1954 transitions, 49885 flow [2023-08-27 09:01:24,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 746 places, 1954 transitions, 49086 flow, removed 215 selfloop flow, removed 27 redundant places. [2023-08-27 09:01:24,477 INFO L231 Difference]: Finished difference. Result has 757 places, 1669 transitions, 45142 flow [2023-08-27 09:01:24,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=33348, PETRI_DIFFERENCE_MINUEND_PLACES=679, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=955, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=45142, PETRI_PLACES=757, PETRI_TRANSITIONS=1669} [2023-08-27 09:01:24,478 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 734 predicate places. [2023-08-27 09:01:24,478 INFO L495 AbstractCegarLoop]: Abstraction has has 757 places, 1669 transitions, 45142 flow [2023-08-27 09:01:24,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 94.86666666666666) internal successors, (2846), 30 states have internal predecessors, (2846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:24,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:01:24,478 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:01:24,485 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 09:01:24,683 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,SelfDestructingSolverStorable57 [2023-08-27 09:01:24,684 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:01:24,684 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:01:24,684 INFO L85 PathProgramCache]: Analyzing trace with hash -308614284, now seen corresponding path program 24 times [2023-08-27 09:01:24,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:01:24,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070974813] [2023-08-27 09:01:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:01:24,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:01:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:01:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:01:25,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:01:25,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070974813] [2023-08-27 09:01:25,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070974813] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:01:25,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87382718] [2023-08-27 09:01:25,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 09:01:25,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:01:25,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:01:25,416 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 09:01:25,418 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 09:01:25,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 09:01:25,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:01:25,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 09:01:25,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:01:25,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 09:01:25,789 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 20 [2023-08-27 09:01:26,073 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:01:26,073 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-27 09:01:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:01:26,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:01:26,548 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:01:26,549 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 133 treesize of output 189 [2023-08-27 09:01:26,568 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:01:26,569 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 63 [2023-08-27 09:01:26,807 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:01:26,807 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 108 [2023-08-27 09:01:26,817 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:01:26,818 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2023-08-27 09:01:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:01:26,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87382718] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:01:26,981 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:01:26,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 10] total 31 [2023-08-27 09:01:26,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551948696] [2023-08-27 09:01:26,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:01:26,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 09:01:26,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:01:26,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 09:01:26,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=931, Unknown=1, NotChecked=0, Total=1056 [2023-08-27 09:01:26,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 09:01:26,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 757 places, 1669 transitions, 45142 flow. Second operand has 33 states, 33 states have (on average 91.45454545454545) internal successors, (3018), 33 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:26,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:01:26,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 09:01:26,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:01:33,855 INFO L124 PetriNetUnfolderBase]: 4872/9022 cut-off events. [2023-08-27 09:01:33,855 INFO L125 PetriNetUnfolderBase]: For 603916/603916 co-relation queries the response was YES. [2023-08-27 09:01:33,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111065 conditions, 9022 events. 4872/9022 cut-off events. For 603916/603916 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 71886 event pairs, 625 based on Foata normal form. 4/9025 useless extension candidates. Maximal degree in co-relation 110842. Up to 7879 conditions per place. [2023-08-27 09:01:34,037 INFO L140 encePairwiseOnDemand]: 352/363 looper letters, 1412 selfloop transitions, 353 changer transitions 9/1774 dead transitions. [2023-08-27 09:01:34,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 789 places, 1774 transitions, 49586 flow [2023-08-27 09:01:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-27 09:01:34,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-27 09:01:34,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3363 transitions. [2023-08-27 09:01:34,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26469893742621015 [2023-08-27 09:01:34,040 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3363 transitions. [2023-08-27 09:01:34,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3363 transitions. [2023-08-27 09:01:34,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:01:34,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3363 transitions. [2023-08-27 09:01:34,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 96.08571428571429) internal successors, (3363), 35 states have internal predecessors, (3363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:34,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 363.0) internal successors, (13068), 36 states have internal predecessors, (13068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:34,047 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 363.0) internal successors, (13068), 36 states have internal predecessors, (13068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:34,047 INFO L175 Difference]: Start difference. First operand has 757 places, 1669 transitions, 45142 flow. Second operand 35 states and 3363 transitions. [2023-08-27 09:01:34,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 789 places, 1774 transitions, 49586 flow [2023-08-27 09:01:38,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 750 places, 1774 transitions, 47779 flow, removed 505 selfloop flow, removed 39 redundant places. [2023-08-27 09:01:38,589 INFO L231 Difference]: Finished difference. Result has 754 places, 1671 transitions, 44267 flow [2023-08-27 09:01:38,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=43345, PETRI_DIFFERENCE_MINUEND_PLACES=716, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=349, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=44267, PETRI_PLACES=754, PETRI_TRANSITIONS=1671} [2023-08-27 09:01:38,605 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 731 predicate places. [2023-08-27 09:01:38,605 INFO L495 AbstractCegarLoop]: Abstraction has has 754 places, 1671 transitions, 44267 flow [2023-08-27 09:01:38,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 91.45454545454545) internal successors, (3018), 33 states have internal predecessors, (3018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:38,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:01:38,606 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:01:38,621 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 09:01:38,806 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,SelfDestructingSolverStorable58 [2023-08-27 09:01:38,806 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:01:38,807 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:01:38,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1881275466, now seen corresponding path program 14 times [2023-08-27 09:01:38,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:01:38,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424648985] [2023-08-27 09:01:38,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:01:38,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:01:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:01:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:01:38,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:01:38,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424648985] [2023-08-27 09:01:38,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424648985] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:01:38,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232108763] [2023-08-27 09:01:38,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:01:38,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:01:38,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:01:38,948 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 09:01:38,949 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 09:01:39,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:01:39,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:01:39,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 09:01:39,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:01:39,191 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 102 [2023-08-27 09:01:39,222 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:01:39,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:01:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:01:39,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232108763] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:01:39,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:01:39,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-08-27 09:01:39,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112070109] [2023-08-27 09:01:39,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:01:39,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 09:01:39,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:01:39,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 09:01:39,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2023-08-27 09:01:39,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 09:01:39,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 1671 transitions, 44267 flow. Second operand has 16 states, 16 states have (on average 139.75) internal successors, (2236), 16 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:39,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:01:39,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 09:01:39,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:01:46,157 INFO L124 PetriNetUnfolderBase]: 6059/11116 cut-off events. [2023-08-27 09:01:46,157 INFO L125 PetriNetUnfolderBase]: For 720024/720024 co-relation queries the response was YES. [2023-08-27 09:01:46,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132285 conditions, 11116 events. 6059/11116 cut-off events. For 720024/720024 co-relation queries the response was YES. Maximal size of possible extension queue 802. Compared 90048 event pairs, 125 based on Foata normal form. 14/11129 useless extension candidates. Maximal degree in co-relation 132063. Up to 2783 conditions per place. [2023-08-27 09:01:46,348 INFO L140 encePairwiseOnDemand]: 356/363 looper letters, 862 selfloop transitions, 1304 changer transitions 1/2167 dead transitions. [2023-08-27 09:01:46,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 777 places, 2167 transitions, 59601 flow [2023-08-27 09:01:46,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 09:01:46,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 09:01:46,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3635 transitions. [2023-08-27 09:01:46,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40055096418732783 [2023-08-27 09:01:46,350 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3635 transitions. [2023-08-27 09:01:46,350 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3635 transitions. [2023-08-27 09:01:46,351 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:01:46,351 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3635 transitions. [2023-08-27 09:01:46,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 145.4) internal successors, (3635), 25 states have internal predecessors, (3635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:46,356 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 363.0) internal successors, (9438), 26 states have internal predecessors, (9438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:46,356 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 363.0) internal successors, (9438), 26 states have internal predecessors, (9438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:46,356 INFO L175 Difference]: Start difference. First operand has 754 places, 1671 transitions, 44267 flow. Second operand 25 states and 3635 transitions. [2023-08-27 09:01:46,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 777 places, 2167 transitions, 59601 flow [2023-08-27 09:01:52,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 746 places, 2167 transitions, 58972 flow, removed 79 selfloop flow, removed 31 redundant places. [2023-08-27 09:01:52,120 INFO L231 Difference]: Finished difference. Result has 754 places, 1956 transitions, 54835 flow [2023-08-27 09:01:52,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=43649, PETRI_DIFFERENCE_MINUEND_PLACES=722, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1070, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=54835, PETRI_PLACES=754, PETRI_TRANSITIONS=1956} [2023-08-27 09:01:52,122 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 731 predicate places. [2023-08-27 09:01:52,122 INFO L495 AbstractCegarLoop]: Abstraction has has 754 places, 1956 transitions, 54835 flow [2023-08-27 09:01:52,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 139.75) internal successors, (2236), 16 states have internal predecessors, (2236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:52,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:01:52,123 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:01:52,130 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 09:01:52,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-27 09:01:52,328 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:01:52,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:01:52,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1758875826, now seen corresponding path program 25 times [2023-08-27 09:01:52,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:01:52,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198150848] [2023-08-27 09:01:52,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:01:52,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:01:52,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:01:53,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:01:53,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:01:53,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198150848] [2023-08-27 09:01:53,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198150848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:01:53,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088334767] [2023-08-27 09:01:53,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 09:01:53,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:01:53,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:01:53,239 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 09:01:53,249 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 09:01:53,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:01:53,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 09:01:53,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:01:53,604 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:01:53,604 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-27 09:01:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:01:53,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:01:54,000 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 09:01:54,000 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-27 09:01:54,092 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 09:01:54,093 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 09:01:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:01:54,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088334767] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:01:54,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:01:54,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 26 [2023-08-27 09:01:54,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648284896] [2023-08-27 09:01:54,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:01:54,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 09:01:54,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:01:54,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 09:01:54,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-08-27 09:01:54,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 09:01:54,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 754 places, 1956 transitions, 54835 flow. Second operand has 28 states, 28 states have (on average 91.82142857142857) internal successors, (2571), 28 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:01:54,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:01:54,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 09:01:54,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:02:02,076 INFO L124 PetriNetUnfolderBase]: 6114/11218 cut-off events. [2023-08-27 09:02:02,076 INFO L125 PetriNetUnfolderBase]: For 776685/776685 co-relation queries the response was YES. [2023-08-27 09:02:02,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139998 conditions, 11218 events. 6114/11218 cut-off events. For 776685/776685 co-relation queries the response was YES. Maximal size of possible extension queue 833. Compared 91194 event pairs, 1075 based on Foata normal form. 5/11222 useless extension candidates. Maximal degree in co-relation 139771. Up to 10880 conditions per place. [2023-08-27 09:02:02,279 INFO L140 encePairwiseOnDemand]: 351/363 looper letters, 1912 selfloop transitions, 114 changer transitions 10/2036 dead transitions. [2023-08-27 09:02:02,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 782 places, 2036 transitions, 60117 flow [2023-08-27 09:02:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 09:02:02,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 09:02:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2769 transitions. [2023-08-27 09:02:02,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26303790253633513 [2023-08-27 09:02:02,282 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2769 transitions. [2023-08-27 09:02:02,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2769 transitions. [2023-08-27 09:02:02,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:02:02,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2769 transitions. [2023-08-27 09:02:02,283 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 95.48275862068965) internal successors, (2769), 29 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:02,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 363.0) internal successors, (10890), 30 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:02,288 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 363.0) internal successors, (10890), 30 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:02,288 INFO L175 Difference]: Start difference. First operand has 754 places, 1956 transitions, 54835 flow. Second operand 29 states and 2769 transitions. [2023-08-27 09:02:02,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 782 places, 2036 transitions, 60117 flow [2023-08-27 09:02:08,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 772 places, 2036 transitions, 58596 flow, removed 320 selfloop flow, removed 10 redundant places. [2023-08-27 09:02:08,636 INFO L231 Difference]: Finished difference. Result has 780 places, 1971 transitions, 54229 flow [2023-08-27 09:02:08,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=53318, PETRI_DIFFERENCE_MINUEND_PLACES=744, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1956, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=54229, PETRI_PLACES=780, PETRI_TRANSITIONS=1971} [2023-08-27 09:02:08,637 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 757 predicate places. [2023-08-27 09:02:08,637 INFO L495 AbstractCegarLoop]: Abstraction has has 780 places, 1971 transitions, 54229 flow [2023-08-27 09:02:08,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 91.82142857142857) internal successors, (2571), 28 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:08,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:02:08,637 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:02:08,642 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 09:02:08,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:02:08,843 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:02:08,843 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:02:08,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1603625522, now seen corresponding path program 26 times [2023-08-27 09:02:08,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:02:08,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035873551] [2023-08-27 09:02:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:02:08,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:02:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:02:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:02:09,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:02:09,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035873551] [2023-08-27 09:02:09,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035873551] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:02:09,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750592773] [2023-08-27 09:02:09,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:02:09,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:02:09,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:02:09,731 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 09:02:09,733 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 09:02:09,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:02:09,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:02:09,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 09:02:09,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:02:10,142 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:02:10,142 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-08-27 09:02:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:02:10,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:02:10,566 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 09:02:10,566 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-27 09:02:10,735 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 09:02:10,736 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 09:02:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:02:10,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750592773] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:02:10,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:02:10,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-08-27 09:02:10,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066473585] [2023-08-27 09:02:10,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:02:10,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 09:02:10,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:02:10,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 09:02:10,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-08-27 09:02:10,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 09:02:10,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 780 places, 1971 transitions, 54229 flow. Second operand has 28 states, 28 states have (on average 91.71428571428571) internal successors, (2568), 28 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:10,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:02:10,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 09:02:10,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:02:18,412 INFO L124 PetriNetUnfolderBase]: 6112/11206 cut-off events. [2023-08-27 09:02:18,412 INFO L125 PetriNetUnfolderBase]: For 808005/808005 co-relation queries the response was YES. [2023-08-27 09:02:18,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 138557 conditions, 11206 events. 6112/11206 cut-off events. For 808005/808005 co-relation queries the response was YES. Maximal size of possible extension queue 811. Compared 90669 event pairs, 1061 based on Foata normal form. 1/11206 useless extension candidates. Maximal degree in co-relation 138323. Up to 10801 conditions per place. [2023-08-27 09:02:18,614 INFO L140 encePairwiseOnDemand]: 353/363 looper letters, 1870 selfloop transitions, 157 changer transitions 5/2032 dead transitions. [2023-08-27 09:02:18,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 804 places, 2032 transitions, 59012 flow [2023-08-27 09:02:18,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 09:02:18,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 09:02:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2378 transitions. [2023-08-27 09:02:18,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26203856749311294 [2023-08-27 09:02:18,616 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2378 transitions. [2023-08-27 09:02:18,616 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2378 transitions. [2023-08-27 09:02:18,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:02:18,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2378 transitions. [2023-08-27 09:02:18,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 95.12) internal successors, (2378), 25 states have internal predecessors, (2378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:18,621 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 363.0) internal successors, (9438), 26 states have internal predecessors, (9438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:18,621 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 363.0) internal successors, (9438), 26 states have internal predecessors, (9438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:18,621 INFO L175 Difference]: Start difference. First operand has 780 places, 1971 transitions, 54229 flow. Second operand 25 states and 2378 transitions. [2023-08-27 09:02:18,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 804 places, 2032 transitions, 59012 flow [2023-08-27 09:02:25,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 783 places, 2032 transitions, 58485 flow, removed 166 selfloop flow, removed 21 redundant places. [2023-08-27 09:02:25,226 INFO L231 Difference]: Finished difference. Result has 788 places, 1983 transitions, 54503 flow [2023-08-27 09:02:25,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=53705, PETRI_DIFFERENCE_MINUEND_PLACES=759, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1971, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1820, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=54503, PETRI_PLACES=788, PETRI_TRANSITIONS=1983} [2023-08-27 09:02:25,227 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 765 predicate places. [2023-08-27 09:02:25,227 INFO L495 AbstractCegarLoop]: Abstraction has has 788 places, 1983 transitions, 54503 flow [2023-08-27 09:02:25,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 91.71428571428571) internal successors, (2568), 28 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:25,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:02:25,228 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:02:25,235 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 09:02:25,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:02:25,433 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:02:25,433 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:02:25,433 INFO L85 PathProgramCache]: Analyzing trace with hash 12569074, now seen corresponding path program 15 times [2023-08-27 09:02:25,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:02:25,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826491843] [2023-08-27 09:02:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:02:25,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:02:25,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:02:25,608 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:02:25,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:02:25,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826491843] [2023-08-27 09:02:25,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826491843] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:02:25,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803944485] [2023-08-27 09:02:25,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 09:02:25,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:02:25,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:02:25,609 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 09:02:25,611 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 09:02:25,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 09:02:25,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:02:25,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 09:02:25,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:02:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:02:26,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:02:26,274 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:02:26,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803944485] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:02:26,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:02:26,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-08-27 09:02:26,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599262081] [2023-08-27 09:02:26,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:02:26,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 09:02:26,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:02:26,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 09:02:26,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-08-27 09:02:26,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 09:02:26,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 788 places, 1983 transitions, 54503 flow. Second operand has 14 states, 14 states have (on average 139.92857142857142) internal successors, (1959), 14 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:26,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:02:26,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 09:02:26,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:02:34,362 INFO L124 PetriNetUnfolderBase]: 6181/11342 cut-off events. [2023-08-27 09:02:34,362 INFO L125 PetriNetUnfolderBase]: For 849799/849799 co-relation queries the response was YES. [2023-08-27 09:02:34,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140003 conditions, 11342 events. 6181/11342 cut-off events. For 849799/849799 co-relation queries the response was YES. Maximal size of possible extension queue 843. Compared 92492 event pairs, 768 based on Foata normal form. 56/11397 useless extension candidates. Maximal degree in co-relation 139766. Up to 4656 conditions per place. [2023-08-27 09:02:34,588 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 1156 selfloop transitions, 941 changer transitions 2/2099 dead transitions. [2023-08-27 09:02:34,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 811 places, 2099 transitions, 60379 flow [2023-08-27 09:02:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 09:02:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 09:02:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3587 transitions. [2023-08-27 09:02:34,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952617079889807 [2023-08-27 09:02:34,590 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3587 transitions. [2023-08-27 09:02:34,590 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3587 transitions. [2023-08-27 09:02:34,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:02:34,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3587 transitions. [2023-08-27 09:02:34,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 143.48) internal successors, (3587), 25 states have internal predecessors, (3587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:34,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 363.0) internal successors, (9438), 26 states have internal predecessors, (9438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:34,596 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 363.0) internal successors, (9438), 26 states have internal predecessors, (9438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:34,596 INFO L175 Difference]: Start difference. First operand has 788 places, 1983 transitions, 54503 flow. Second operand 25 states and 3587 transitions. [2023-08-27 09:02:34,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 811 places, 2099 transitions, 60379 flow [2023-08-27 09:02:42,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 801 places, 2099 transitions, 60015 flow, removed 124 selfloop flow, removed 10 redundant places. [2023-08-27 09:02:42,181 INFO L231 Difference]: Finished difference. Result has 806 places, 1998 transitions, 57306 flow [2023-08-27 09:02:42,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=54149, PETRI_DIFFERENCE_MINUEND_PLACES=777, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1983, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=928, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1048, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=57306, PETRI_PLACES=806, PETRI_TRANSITIONS=1998} [2023-08-27 09:02:42,183 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 783 predicate places. [2023-08-27 09:02:42,183 INFO L495 AbstractCegarLoop]: Abstraction has has 806 places, 1998 transitions, 57306 flow [2023-08-27 09:02:42,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 139.92857142857142) internal successors, (1959), 14 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:42,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:02:42,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:02:42,188 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 09:02:42,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:02:42,384 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:02:42,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:02:42,384 INFO L85 PathProgramCache]: Analyzing trace with hash 442718522, now seen corresponding path program 27 times [2023-08-27 09:02:42,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:02:42,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241219619] [2023-08-27 09:02:42,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:02:42,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:02:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:02:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:02:43,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:02:43,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241219619] [2023-08-27 09:02:43,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241219619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:02:43,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296131218] [2023-08-27 09:02:43,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 09:02:43,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:02:43,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:02:43,191 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 09:02:43,192 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 09:02:43,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 09:02:43,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:02:43,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 09:02:43,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:02:43,643 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:02:43,643 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-27 09:02:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:02:43,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:02:44,051 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 09:02:44,052 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-27 09:02:44,155 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 09:02:44,155 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 09:02:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:02:44,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296131218] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:02:44,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:02:44,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-27 09:02:44,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791300450] [2023-08-27 09:02:44,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:02:44,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 09:02:44,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:02:44,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 09:02:44,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2023-08-27 09:02:44,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 09:02:44,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 806 places, 1998 transitions, 57306 flow. Second operand has 29 states, 29 states have (on average 91.79310344827586) internal successors, (2662), 29 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:44,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:02:44,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 09:02:44,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:02:52,351 INFO L124 PetriNetUnfolderBase]: 6250/11464 cut-off events. [2023-08-27 09:02:52,351 INFO L125 PetriNetUnfolderBase]: For 909941/909941 co-relation queries the response was YES. [2023-08-27 09:02:52,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146850 conditions, 11464 events. 6250/11464 cut-off events. For 909941/909941 co-relation queries the response was YES. Maximal size of possible extension queue 860. Compared 93604 event pairs, 1115 based on Foata normal form. 5/11468 useless extension candidates. Maximal degree in co-relation 146610. Up to 11087 conditions per place. [2023-08-27 09:02:52,561 INFO L140 encePairwiseOnDemand]: 351/363 looper letters, 1955 selfloop transitions, 130 changer transitions 9/2094 dead transitions. [2023-08-27 09:02:52,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 836 places, 2094 transitions, 62985 flow [2023-08-27 09:02:52,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-27 09:02:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-27 09:02:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2964 transitions. [2023-08-27 09:02:52,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26339642761930154 [2023-08-27 09:02:52,564 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2964 transitions. [2023-08-27 09:02:52,564 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2964 transitions. [2023-08-27 09:02:52,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:02:52,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2964 transitions. [2023-08-27 09:02:52,566 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 95.61290322580645) internal successors, (2964), 31 states have internal predecessors, (2964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:52,569 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 363.0) internal successors, (11616), 32 states have internal predecessors, (11616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:52,570 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 363.0) internal successors, (11616), 32 states have internal predecessors, (11616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:02:52,570 INFO L175 Difference]: Start difference. First operand has 806 places, 1998 transitions, 57306 flow. Second operand 31 states and 2964 transitions. [2023-08-27 09:02:52,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 836 places, 2094 transitions, 62985 flow [2023-08-27 09:03:00,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 820 places, 2094 transitions, 61946 flow, removed 45 selfloop flow, removed 16 redundant places. [2023-08-27 09:03:00,719 INFO L231 Difference]: Finished difference. Result has 829 places, 2019 transitions, 57399 flow [2023-08-27 09:03:00,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=56275, PETRI_DIFFERENCE_MINUEND_PLACES=790, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1998, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1869, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=57399, PETRI_PLACES=829, PETRI_TRANSITIONS=2019} [2023-08-27 09:03:00,720 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 806 predicate places. [2023-08-27 09:03:00,720 INFO L495 AbstractCegarLoop]: Abstraction has has 829 places, 2019 transitions, 57399 flow [2023-08-27 09:03:00,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 91.79310344827586) internal successors, (2662), 29 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:00,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:03:00,720 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:03:00,728 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 09:03:00,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:03:00,922 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:03:00,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:03:00,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1208044184, now seen corresponding path program 28 times [2023-08-27 09:03:00,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:03:00,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865760270] [2023-08-27 09:03:00,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:03:00,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:03:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:03:01,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:03:01,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:03:01,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865760270] [2023-08-27 09:03:01,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865760270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:03:01,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511761034] [2023-08-27 09:03:01,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 09:03:01,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:03:01,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:03:01,519 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:03:01,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-27 09:03:01,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 09:03:01,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:03:01,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 27 conjunts are in the unsatisfiable core [2023-08-27 09:03:01,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:03:01,916 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:03:01,916 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 78 [2023-08-27 09:03:02,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:03:02,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:03:02,307 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 09:03:02,308 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 09:03:02,410 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 09:03:02,410 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-27 09:03:02,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:03:02,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511761034] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:03:02,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:03:02,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 7] total 24 [2023-08-27 09:03:02,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815808141] [2023-08-27 09:03:02,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:03:02,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-08-27 09:03:02,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:03:02,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-08-27 09:03:02,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2023-08-27 09:03:02,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 09:03:02,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 829 places, 2019 transitions, 57399 flow. Second operand has 26 states, 26 states have (on average 91.8076923076923) internal successors, (2387), 26 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:02,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:03:02,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 09:03:02,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:03:10,331 INFO L124 PetriNetUnfolderBase]: 6247/11461 cut-off events. [2023-08-27 09:03:10,331 INFO L125 PetriNetUnfolderBase]: For 930891/930891 co-relation queries the response was YES. [2023-08-27 09:03:10,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146831 conditions, 11461 events. 6247/11461 cut-off events. For 930891/930891 co-relation queries the response was YES. Maximal size of possible extension queue 841. Compared 93286 event pairs, 1085 based on Foata normal form. 1/11461 useless extension candidates. Maximal degree in co-relation 146580. Up to 11004 conditions per place. [2023-08-27 09:03:10,550 INFO L140 encePairwiseOnDemand]: 353/363 looper letters, 1904 selfloop transitions, 169 changer transitions 5/2078 dead transitions. [2023-08-27 09:03:10,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 855 places, 2078 transitions, 62137 flow [2023-08-27 09:03:10,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 09:03:10,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 09:03:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2564 transitions. [2023-08-27 09:03:10,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26160595857565555 [2023-08-27 09:03:10,552 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2564 transitions. [2023-08-27 09:03:10,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2564 transitions. [2023-08-27 09:03:10,552 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:03:10,552 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2564 transitions. [2023-08-27 09:03:10,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 94.96296296296296) internal successors, (2564), 27 states have internal predecessors, (2564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:10,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 363.0) internal successors, (10164), 28 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:10,558 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 363.0) internal successors, (10164), 28 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:10,558 INFO L175 Difference]: Start difference. First operand has 829 places, 2019 transitions, 57399 flow. Second operand 27 states and 2564 transitions. [2023-08-27 09:03:10,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 855 places, 2078 transitions, 62137 flow [2023-08-27 09:03:18,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 836 places, 2078 transitions, 61675 flow, removed 140 selfloop flow, removed 19 redundant places. [2023-08-27 09:03:18,706 INFO L231 Difference]: Finished difference. Result has 839 places, 2025 transitions, 57460 flow [2023-08-27 09:03:18,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=56937, PETRI_DIFFERENCE_MINUEND_PLACES=810, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2019, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1853, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=57460, PETRI_PLACES=839, PETRI_TRANSITIONS=2025} [2023-08-27 09:03:18,707 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 816 predicate places. [2023-08-27 09:03:18,707 INFO L495 AbstractCegarLoop]: Abstraction has has 839 places, 2025 transitions, 57460 flow [2023-08-27 09:03:18,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 91.8076923076923) internal successors, (2387), 26 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:18,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:03:18,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:03:18,715 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-27 09:03:18,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:03:18,913 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:03:18,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:03:18,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1622654194, now seen corresponding path program 29 times [2023-08-27 09:03:18,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:03:18,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180534139] [2023-08-27 09:03:18,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:03:18,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:03:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:03:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:03:19,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:03:19,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180534139] [2023-08-27 09:03:19,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180534139] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:03:19,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139429286] [2023-08-27 09:03:19,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 09:03:19,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:03:19,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:03:19,551 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:03:19,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-27 09:03:19,701 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 09:03:19,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:03:19,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 09:03:19,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:03:19,974 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 09:03:20,009 INFO L322 Elim1Store]: treesize reduction 49, result has 40.2 percent of original size [2023-08-27 09:03:20,009 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 184 treesize of output 143 [2023-08-27 09:03:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:03:20,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:03:20,627 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:03:20,628 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 133 treesize of output 158 [2023-08-27 09:03:21,056 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:03:21,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139429286] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:03:21,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:03:21,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 8] total 27 [2023-08-27 09:03:21,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250298332] [2023-08-27 09:03:21,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:03:21,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 09:03:21,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:03:21,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 09:03:21,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2023-08-27 09:03:21,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 09:03:21,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 839 places, 2025 transitions, 57460 flow. Second operand has 29 states, 29 states have (on average 91.65517241379311) internal successors, (2658), 29 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:21,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:03:21,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 09:03:21,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:03:29,435 INFO L124 PetriNetUnfolderBase]: 6292/11552 cut-off events. [2023-08-27 09:03:29,435 INFO L125 PetriNetUnfolderBase]: For 967278/967278 co-relation queries the response was YES. [2023-08-27 09:03:29,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148811 conditions, 11552 events. 6292/11552 cut-off events. For 967278/967278 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 94496 event pairs, 1093 based on Foata normal form. 3/11554 useless extension candidates. Maximal degree in co-relation 148557. Up to 11009 conditions per place. [2023-08-27 09:03:29,658 INFO L140 encePairwiseOnDemand]: 351/363 looper letters, 1934 selfloop transitions, 187 changer transitions 11/2132 dead transitions. [2023-08-27 09:03:29,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 869 places, 2132 transitions, 63264 flow [2023-08-27 09:03:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 09:03:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 09:03:29,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3073 transitions. [2023-08-27 09:03:29,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26454889807162535 [2023-08-27 09:03:29,661 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3073 transitions. [2023-08-27 09:03:29,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3073 transitions. [2023-08-27 09:03:29,661 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:03:29,661 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3073 transitions. [2023-08-27 09:03:29,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 96.03125) internal successors, (3073), 32 states have internal predecessors, (3073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:29,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 363.0) internal successors, (11979), 33 states have internal predecessors, (11979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:29,667 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 363.0) internal successors, (11979), 33 states have internal predecessors, (11979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:29,667 INFO L175 Difference]: Start difference. First operand has 839 places, 2025 transitions, 57460 flow. Second operand 32 states and 3073 transitions. [2023-08-27 09:03:29,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 869 places, 2132 transitions, 63264 flow [2023-08-27 09:03:37,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 852 places, 2132 transitions, 62914 flow, removed 27 selfloop flow, removed 17 redundant places. [2023-08-27 09:03:37,627 INFO L231 Difference]: Finished difference. Result has 860 places, 2044 transitions, 58287 flow [2023-08-27 09:03:37,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=57118, PETRI_DIFFERENCE_MINUEND_PLACES=821, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1840, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=58287, PETRI_PLACES=860, PETRI_TRANSITIONS=2044} [2023-08-27 09:03:37,629 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 837 predicate places. [2023-08-27 09:03:37,629 INFO L495 AbstractCegarLoop]: Abstraction has has 860 places, 2044 transitions, 58287 flow [2023-08-27 09:03:37,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 91.65517241379311) internal successors, (2658), 29 states have internal predecessors, (2658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:37,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:03:37,629 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:03:37,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-08-27 09:03:37,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-08-27 09:03:37,834 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:03:37,834 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:03:37,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1523490508, now seen corresponding path program 16 times [2023-08-27 09:03:37,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:03:37,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702684260] [2023-08-27 09:03:37,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:03:37,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:03:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:03:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:03:37,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:03:37,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702684260] [2023-08-27 09:03:37,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702684260] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:03:37,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966150301] [2023-08-27 09:03:37,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 09:03:37,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:03:37,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:03:37,987 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:03:37,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-27 09:03:38,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 09:03:38,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:03:38,174 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 14 conjunts are in the unsatisfiable core [2023-08-27 09:03:38,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:03:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:03:38,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:03:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:03:38,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966150301] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:03:38,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:03:38,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 09:03:38,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994035119] [2023-08-27 09:03:38,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:03:38,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 09:03:38,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:03:38,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 09:03:38,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2023-08-27 09:03:38,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 09:03:38,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 860 places, 2044 transitions, 58287 flow. Second operand has 18 states, 18 states have (on average 139.88888888888889) internal successors, (2518), 18 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:38,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:03:38,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 09:03:38,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:03:47,655 INFO L124 PetriNetUnfolderBase]: 6408/11771 cut-off events. [2023-08-27 09:03:47,656 INFO L125 PetriNetUnfolderBase]: For 1044219/1044219 co-relation queries the response was YES. [2023-08-27 09:03:47,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152896 conditions, 11771 events. 6408/11771 cut-off events. For 1044219/1044219 co-relation queries the response was YES. Maximal size of possible extension queue 882. Compared 96746 event pairs, 768 based on Foata normal form. 56/11826 useless extension candidates. Maximal degree in co-relation 152635. Up to 4723 conditions per place. [2023-08-27 09:03:47,921 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 1182 selfloop transitions, 1015 changer transitions 2/2199 dead transitions. [2023-08-27 09:03:47,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 884 places, 2199 transitions, 65540 flow [2023-08-27 09:03:47,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-27 09:03:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-27 09:03:47,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 3881 transitions. [2023-08-27 09:03:47,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3959800020406081 [2023-08-27 09:03:47,923 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 3881 transitions. [2023-08-27 09:03:47,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 3881 transitions. [2023-08-27 09:03:47,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:03:47,924 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 3881 transitions. [2023-08-27 09:03:47,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 143.74074074074073) internal successors, (3881), 27 states have internal predecessors, (3881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:47,930 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 363.0) internal successors, (10164), 28 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:47,930 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 363.0) internal successors, (10164), 28 states have internal predecessors, (10164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:47,930 INFO L175 Difference]: Start difference. First operand has 860 places, 2044 transitions, 58287 flow. Second operand 27 states and 3881 transitions. [2023-08-27 09:03:47,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 884 places, 2199 transitions, 65540 flow [2023-08-27 09:03:57,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 851 places, 2199 transitions, 65049 flow, removed 119 selfloop flow, removed 33 redundant places. [2023-08-27 09:03:57,085 INFO L231 Difference]: Finished difference. Result has 862 places, 2093 transitions, 62866 flow [2023-08-27 09:03:57,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=57696, PETRI_DIFFERENCE_MINUEND_PLACES=825, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2040, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=967, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1045, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=62866, PETRI_PLACES=862, PETRI_TRANSITIONS=2093} [2023-08-27 09:03:57,087 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 839 predicate places. [2023-08-27 09:03:57,087 INFO L495 AbstractCegarLoop]: Abstraction has has 862 places, 2093 transitions, 62866 flow [2023-08-27 09:03:57,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 139.88888888888889) internal successors, (2518), 18 states have internal predecessors, (2518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:57,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:03:57,088 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:03:57,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-27 09:03:57,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-08-27 09:03:57,293 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:03:57,293 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:03:57,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1622059548, now seen corresponding path program 30 times [2023-08-27 09:03:57,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:03:57,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561367827] [2023-08-27 09:03:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:03:57,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:03:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:03:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:03:57,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:03:57,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561367827] [2023-08-27 09:03:57,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561367827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:03:57,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426746343] [2023-08-27 09:03:57,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 09:03:57,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:03:57,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:03:57,962 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:03:57,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-27 09:03:58,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-27 09:03:58,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:03:58,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 09:03:58,115 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:03:58,337 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:03:58,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-08-27 09:03:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:03:58,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:03:58,846 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 09:03:58,847 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-27 09:03:58,964 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 09:03:58,964 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 09:03:59,012 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:03:59,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426746343] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:03:59,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:03:59,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-08-27 09:03:59,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981182336] [2023-08-27 09:03:59,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:03:59,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 09:03:59,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:03:59,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 09:03:59,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=643, Unknown=0, NotChecked=0, Total=756 [2023-08-27 09:03:59,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 09:03:59,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 862 places, 2093 transitions, 62866 flow. Second operand has 28 states, 28 states have (on average 91.71428571428571) internal successors, (2568), 28 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:03:59,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:03:59,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 09:03:59,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:04:07,757 INFO L124 PetriNetUnfolderBase]: 6420/11820 cut-off events. [2023-08-27 09:04:07,758 INFO L125 PetriNetUnfolderBase]: For 1077335/1077335 co-relation queries the response was YES. [2023-08-27 09:04:07,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159126 conditions, 11820 events. 6420/11820 cut-off events. For 1077335/1077335 co-relation queries the response was YES. Maximal size of possible extension queue 904. Compared 97513 event pairs, 1073 based on Foata normal form. 3/11822 useless extension candidates. Maximal degree in co-relation 158865. Up to 10514 conditions per place. [2023-08-27 09:04:08,033 INFO L140 encePairwiseOnDemand]: 353/363 looper letters, 1904 selfloop transitions, 368 changer transitions 8/2280 dead transitions. [2023-08-27 09:04:08,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 890 places, 2280 transitions, 70115 flow [2023-08-27 09:04:08,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-27 09:04:08,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-27 09:04:08,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2790 transitions. [2023-08-27 09:04:08,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26503277286976346 [2023-08-27 09:04:08,036 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2790 transitions. [2023-08-27 09:04:08,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2790 transitions. [2023-08-27 09:04:08,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:04:08,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2790 transitions. [2023-08-27 09:04:08,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 96.20689655172414) internal successors, (2790), 29 states have internal predecessors, (2790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:08,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 363.0) internal successors, (10890), 30 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:08,042 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 363.0) internal successors, (10890), 30 states have internal predecessors, (10890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:08,042 INFO L175 Difference]: Start difference. First operand has 862 places, 2093 transitions, 62866 flow. Second operand 29 states and 2790 transitions. [2023-08-27 09:04:08,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 890 places, 2280 transitions, 70115 flow [2023-08-27 09:04:18,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 879 places, 2280 transitions, 69333 flow, removed 170 selfloop flow, removed 11 redundant places. [2023-08-27 09:04:18,418 INFO L231 Difference]: Finished difference. Result has 887 places, 2112 transitions, 63680 flow [2023-08-27 09:04:18,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=62236, PETRI_DIFFERENCE_MINUEND_PLACES=851, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2093, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=350, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=63680, PETRI_PLACES=887, PETRI_TRANSITIONS=2112} [2023-08-27 09:04:18,419 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 864 predicate places. [2023-08-27 09:04:18,420 INFO L495 AbstractCegarLoop]: Abstraction has has 887 places, 2112 transitions, 63680 flow [2023-08-27 09:04:18,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 91.71428571428571) internal successors, (2568), 28 states have internal predecessors, (2568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:18,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:04:18,420 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:04:18,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-27 09:04:18,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-08-27 09:04:18,625 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:04:18,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:04:18,626 INFO L85 PathProgramCache]: Analyzing trace with hash 418886470, now seen corresponding path program 17 times [2023-08-27 09:04:18,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:04:18,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652274131] [2023-08-27 09:04:18,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:04:18,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:04:18,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:04:18,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:04:18,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:04:18,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652274131] [2023-08-27 09:04:18,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652274131] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:04:18,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197590138] [2023-08-27 09:04:18,802 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 09:04:18,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:04:18,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:04:18,803 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:04:18,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-27 09:04:18,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 09:04:18,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:04:18,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 09:04:18,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:04:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:04:19,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:04:19,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:04:19,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197590138] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:04:19,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:04:19,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-27 09:04:19,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640081696] [2023-08-27 09:04:19,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:04:19,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-27 09:04:19,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:04:19,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-27 09:04:19,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2023-08-27 09:04:19,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 09:04:19,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 887 places, 2112 transitions, 63680 flow. Second operand has 19 states, 19 states have (on average 139.6315789473684) internal successors, (2653), 19 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:19,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:04:19,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 09:04:19,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:04:29,069 INFO L124 PetriNetUnfolderBase]: 7170/12909 cut-off events. [2023-08-27 09:04:29,069 INFO L125 PetriNetUnfolderBase]: For 1252857/1252857 co-relation queries the response was YES. [2023-08-27 09:04:29,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176906 conditions, 12909 events. 7170/12909 cut-off events. For 1252857/1252857 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 105005 event pairs, 409 based on Foata normal form. 80/12988 useless extension candidates. Maximal degree in co-relation 176636. Up to 3939 conditions per place. [2023-08-27 09:04:29,335 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 1158 selfloop transitions, 1462 changer transitions 0/2620 dead transitions. [2023-08-27 09:04:29,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 921 places, 2620 transitions, 81124 flow [2023-08-27 09:04:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-27 09:04:29,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-27 09:04:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 5188 transitions. [2023-08-27 09:04:29,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39700030609121517 [2023-08-27 09:04:29,338 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 5188 transitions. [2023-08-27 09:04:29,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 5188 transitions. [2023-08-27 09:04:29,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:04:29,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 5188 transitions. [2023-08-27 09:04:29,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 144.11111111111111) internal successors, (5188), 36 states have internal predecessors, (5188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:29,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 363.0) internal successors, (13431), 37 states have internal predecessors, (13431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:29,346 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 363.0) internal successors, (13431), 37 states have internal predecessors, (13431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:29,346 INFO L175 Difference]: Start difference. First operand has 887 places, 2112 transitions, 63680 flow. Second operand 36 states and 5188 transitions. [2023-08-27 09:04:29,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 921 places, 2620 transitions, 81124 flow [2023-08-27 09:04:41,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 902 places, 2620 transitions, 79983 flow, removed 85 selfloop flow, removed 19 redundant places. [2023-08-27 09:04:41,346 INFO L231 Difference]: Finished difference. Result has 907 places, 2316 transitions, 72473 flow [2023-08-27 09:04:41,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=62494, PETRI_DIFFERENCE_MINUEND_PLACES=867, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=734, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=72473, PETRI_PLACES=907, PETRI_TRANSITIONS=2316} [2023-08-27 09:04:41,348 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 884 predicate places. [2023-08-27 09:04:41,348 INFO L495 AbstractCegarLoop]: Abstraction has has 907 places, 2316 transitions, 72473 flow [2023-08-27 09:04:41,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 139.6315789473684) internal successors, (2653), 19 states have internal predecessors, (2653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:41,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:04:41,348 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:04:41,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-27 09:04:41,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:04:41,554 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:04:41,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:04:41,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1344173750, now seen corresponding path program 31 times [2023-08-27 09:04:41,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:04:41,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411206792] [2023-08-27 09:04:41,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:04:41,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:04:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:04:41,623 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 09:04:41,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:04:41,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411206792] [2023-08-27 09:04:41,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411206792] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:04:41,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664932158] [2023-08-27 09:04:41,624 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 09:04:41,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:04:41,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:04:41,626 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:04:41,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-27 09:04:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:04:41,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 09:04:41,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:04:41,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 09:04:41,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:04:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-27 09:04:41,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664932158] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:04:41,859 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:04:41,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 9 [2023-08-27 09:04:41,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116288197] [2023-08-27 09:04:41,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:04:41,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 09:04:41,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:04:41,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 09:04:41,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-08-27 09:04:41,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 09:04:41,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 907 places, 2316 transitions, 72473 flow. Second operand has 9 states, 9 states have (on average 140.77777777777777) internal successors, (1267), 9 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:41,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:04:41,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 09:04:41,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:04:51,113 INFO L124 PetriNetUnfolderBase]: 7200/12946 cut-off events. [2023-08-27 09:04:51,113 INFO L125 PetriNetUnfolderBase]: For 1276587/1276587 co-relation queries the response was YES. [2023-08-27 09:04:51,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181869 conditions, 12946 events. 7200/12946 cut-off events. For 1276587/1276587 co-relation queries the response was YES. Maximal size of possible extension queue 917. Compared 105236 event pairs, 297 based on Foata normal form. 32/12977 useless extension candidates. Maximal degree in co-relation 181596. Up to 5959 conditions per place. [2023-08-27 09:04:51,506 INFO L140 encePairwiseOnDemand]: 357/363 looper letters, 1991 selfloop transitions, 533 changer transitions 19/2543 dead transitions. [2023-08-27 09:04:51,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 911 places, 2543 transitions, 84649 flow [2023-08-27 09:04:51,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 09:04:51,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 09:04:51,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1299 transitions. [2023-08-27 09:04:51,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39761248852157943 [2023-08-27 09:04:51,507 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1299 transitions. [2023-08-27 09:04:51,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1299 transitions. [2023-08-27 09:04:51,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:04:51,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1299 transitions. [2023-08-27 09:04:51,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 144.33333333333334) internal successors, (1299), 9 states have internal predecessors, (1299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:51,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:51,510 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 363.0) internal successors, (3630), 10 states have internal predecessors, (3630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:04:51,510 INFO L175 Difference]: Start difference. First operand has 907 places, 2316 transitions, 72473 flow. Second operand 9 states and 1299 transitions. [2023-08-27 09:04:51,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 911 places, 2543 transitions, 84649 flow [2023-08-27 09:05:03,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 890 places, 2543 transitions, 81811 flow, removed 290 selfloop flow, removed 21 redundant places. [2023-08-27 09:05:03,893 INFO L231 Difference]: Finished difference. Result has 893 places, 2324 transitions, 71769 flow [2023-08-27 09:05:03,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=69588, PETRI_DIFFERENCE_MINUEND_PLACES=882, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=514, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1774, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=71769, PETRI_PLACES=893, PETRI_TRANSITIONS=2324} [2023-08-27 09:05:03,894 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 870 predicate places. [2023-08-27 09:05:03,894 INFO L495 AbstractCegarLoop]: Abstraction has has 893 places, 2324 transitions, 71769 flow [2023-08-27 09:05:03,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 140.77777777777777) internal successors, (1267), 9 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:03,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:05:03,895 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:05:03,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-27 09:05:04,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-08-27 09:05:04,100 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:05:04,100 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:05:04,100 INFO L85 PathProgramCache]: Analyzing trace with hash -546342026, now seen corresponding path program 32 times [2023-08-27 09:05:04,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:05:04,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863860203] [2023-08-27 09:05:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:05:04,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:05:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:05:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:05:04,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:05:04,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863860203] [2023-08-27 09:05:04,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863860203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:05:04,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932380739] [2023-08-27 09:05:04,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:05:04,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:05:04,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:05:04,771 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:05:04,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-27 09:05:04,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:05:04,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:05:04,919 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-27 09:05:04,920 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:05:05,162 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:05:05,162 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 20 [2023-08-27 09:05:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:05:05,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:05:05,567 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 09:05:05,567 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-27 09:05:05,666 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 09:05:05,666 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 09:05:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:05:05,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932380739] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:05:05,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:05:05,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-27 09:05:05,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200120308] [2023-08-27 09:05:05,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:05:05,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 09:05:05,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:05:05,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 09:05:05,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2023-08-27 09:05:05,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 09:05:05,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 893 places, 2324 transitions, 71769 flow. Second operand has 29 states, 29 states have (on average 91.79310344827586) internal successors, (2662), 29 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:05,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:05:05,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 09:05:05,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:05:18,682 INFO L124 PetriNetUnfolderBase]: 7213/12985 cut-off events. [2023-08-27 09:05:18,682 INFO L125 PetriNetUnfolderBase]: For 1288691/1288691 co-relation queries the response was YES. [2023-08-27 09:05:18,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181978 conditions, 12985 events. 7213/12985 cut-off events. For 1288691/1288691 co-relation queries the response was YES. Maximal size of possible extension queue 929. Compared 105312 event pairs, 1125 based on Foata normal form. 6/12990 useless extension candidates. Maximal degree in co-relation 181703. Up to 12374 conditions per place. [2023-08-27 09:05:18,950 INFO L140 encePairwiseOnDemand]: 351/363 looper letters, 2193 selfloop transitions, 244 changer transitions 13/2450 dead transitions. [2023-08-27 09:05:18,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 939 places, 2450 transitions, 77987 flow [2023-08-27 09:05:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-08-27 09:05:18,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2023-08-27 09:05:18,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 4495 transitions. [2023-08-27 09:05:18,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26346638532325184 [2023-08-27 09:05:18,954 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 4495 transitions. [2023-08-27 09:05:18,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 4495 transitions. [2023-08-27 09:05:18,955 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:05:18,955 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 4495 transitions. [2023-08-27 09:05:18,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 95.63829787234043) internal successors, (4495), 47 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:18,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 363.0) internal successors, (17424), 48 states have internal predecessors, (17424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:18,963 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 363.0) internal successors, (17424), 48 states have internal predecessors, (17424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:18,963 INFO L175 Difference]: Start difference. First operand has 893 places, 2324 transitions, 71769 flow. Second operand 47 states and 4495 transitions. [2023-08-27 09:05:18,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 939 places, 2450 transitions, 77987 flow [2023-08-27 09:05:31,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 936 places, 2450 transitions, 77387 flow, removed 111 selfloop flow, removed 3 redundant places. [2023-08-27 09:05:31,227 INFO L231 Difference]: Finished difference. Result has 942 places, 2331 transitions, 71994 flow [2023-08-27 09:05:31,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=71199, PETRI_DIFFERENCE_MINUEND_PLACES=890, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2083, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=71994, PETRI_PLACES=942, PETRI_TRANSITIONS=2331} [2023-08-27 09:05:31,230 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 919 predicate places. [2023-08-27 09:05:31,230 INFO L495 AbstractCegarLoop]: Abstraction has has 942 places, 2331 transitions, 71994 flow [2023-08-27 09:05:31,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 91.79310344827586) internal successors, (2662), 29 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:31,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:05:31,231 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:05:31,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-27 09:05:31,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:05:31,436 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:05:31,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:05:31,436 INFO L85 PathProgramCache]: Analyzing trace with hash -62800330, now seen corresponding path program 18 times [2023-08-27 09:05:31,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:05:31,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880999611] [2023-08-27 09:05:31,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:05:31,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:05:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:05:31,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:05:31,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:05:31,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880999611] [2023-08-27 09:05:31,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880999611] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:05:31,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171341367] [2023-08-27 09:05:31,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 09:05:31,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:05:31,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:05:31,594 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:05:31,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-27 09:05:31,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 09:05:31,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:05:31,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-27 09:05:31,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:05:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:05:31,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:05:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:05:32,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171341367] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:05:32,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:05:32,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-27 09:05:32,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169630846] [2023-08-27 09:05:32,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:05:32,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 09:05:32,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:05:32,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 09:05:32,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-27 09:05:32,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 363 [2023-08-27 09:05:32,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 942 places, 2331 transitions, 71994 flow. Second operand has 18 states, 18 states have (on average 139.94444444444446) internal successors, (2519), 18 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:32,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:05:32,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 363 [2023-08-27 09:05:32,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:05:42,390 INFO L124 PetriNetUnfolderBase]: 7206/12985 cut-off events. [2023-08-27 09:05:42,390 INFO L125 PetriNetUnfolderBase]: For 1175040/1175040 co-relation queries the response was YES. [2023-08-27 09:05:42,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178694 conditions, 12985 events. 7206/12985 cut-off events. For 1175040/1175040 co-relation queries the response was YES. Maximal size of possible extension queue 921. Compared 105640 event pairs, 503 based on Foata normal form. 32/13016 useless extension candidates. Maximal degree in co-relation 178412. Up to 5170 conditions per place. [2023-08-27 09:05:42,802 INFO L140 encePairwiseOnDemand]: 356/363 looper letters, 1075 selfloop transitions, 1385 changer transitions 1/2461 dead transitions. [2023-08-27 09:05:42,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 966 places, 2461 transitions, 78967 flow [2023-08-27 09:05:42,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 09:05:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 09:05:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 3591 transitions. [2023-08-27 09:05:42,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39570247933884295 [2023-08-27 09:05:42,805 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 3591 transitions. [2023-08-27 09:05:42,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 3591 transitions. [2023-08-27 09:05:42,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:05:42,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 3591 transitions. [2023-08-27 09:05:42,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 143.64) internal successors, (3591), 25 states have internal predecessors, (3591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:42,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 363.0) internal successors, (9438), 26 states have internal predecessors, (9438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:42,811 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 363.0) internal successors, (9438), 26 states have internal predecessors, (9438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:42,812 INFO L175 Difference]: Start difference. First operand has 942 places, 2331 transitions, 71994 flow. Second operand 25 states and 3591 transitions. [2023-08-27 09:05:42,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 966 places, 2461 transitions, 78967 flow [2023-08-27 09:05:56,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 928 places, 2461 transitions, 78288 flow, removed 129 selfloop flow, removed 38 redundant places. [2023-08-27 09:05:56,152 INFO L231 Difference]: Finished difference. Result has 930 places, 2335 transitions, 74135 flow [2023-08-27 09:05:56,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=71201, PETRI_DIFFERENCE_MINUEND_PLACES=904, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=946, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=74135, PETRI_PLACES=930, PETRI_TRANSITIONS=2335} [2023-08-27 09:05:56,154 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 907 predicate places. [2023-08-27 09:05:56,154 INFO L495 AbstractCegarLoop]: Abstraction has has 930 places, 2335 transitions, 74135 flow [2023-08-27 09:05:56,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 139.94444444444446) internal successors, (2519), 18 states have internal predecessors, (2519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:05:56,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:05:56,154 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:05:56,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-08-27 09:05:56,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:05:56,359 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:05:56,359 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:05:56,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1048608747, now seen corresponding path program 33 times [2023-08-27 09:05:56,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:05:56,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200155723] [2023-08-27 09:05:56,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:05:56,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:05:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:05:56,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:05:56,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:05:56,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200155723] [2023-08-27 09:05:56,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200155723] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:05:56,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589300367] [2023-08-27 09:05:56,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 09:05:56,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:05:56,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:05:56,549 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:05:56,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-08-27 09:05:56,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 09:05:56,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:05:56,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 65 conjunts are in the unsatisfiable core [2023-08-27 09:05:56,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:05:56,777 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 09:05:56,808 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 09:05:56,835 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 09:05:57,341 INFO L322 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2023-08-27 09:05:57,341 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 314 treesize of output 175 [2023-08-27 09:05:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:05:57,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:05:58,558 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:05:58,558 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 490 treesize of output 286 [2023-08-27 09:05:58,640 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:05:58,640 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 10 new quantified variables, introduced 15 case distinctions, treesize of input 756 treesize of output 796 [2023-08-27 09:05:58,758 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:05:58,759 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 10 new quantified variables, introduced 15 case distinctions, treesize of input 612 treesize of output 580 [2023-08-27 09:05:58,915 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:05:58,915 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 10 new quantified variables, introduced 15 case distinctions, treesize of input 249 treesize of output 325 [2023-08-27 09:06:14,893 INFO L209 tifierPushTermWalker]: Run 10 iterations without descend maybe there is a nontermination bug. [2023-08-27 09:06:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 09:06:15,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589300367] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:06:15,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:06:15,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 35 [2023-08-27 09:06:15,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629159949] [2023-08-27 09:06:15,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:06:15,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 09:06:15,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:06:15,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 09:06:15,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1043, Unknown=5, NotChecked=0, Total=1190 [2023-08-27 09:06:15,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 363 [2023-08-27 09:06:15,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 930 places, 2335 transitions, 74135 flow. Second operand has 35 states, 35 states have (on average 79.68571428571428) internal successors, (2789), 35 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:06:15,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:06:15,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 363 [2023-08-27 09:06:15,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:06:24,273 WARN L234 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 78 DAG size of output: 65 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:06:31,379 WARN L234 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 108 DAG size of output: 98 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:06:38,028 WARN L234 SmtUtils]: Spent 6.29s on a formula simplification. DAG size of input: 97 DAG size of output: 84 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-27 09:06:48,786 INFO L124 PetriNetUnfolderBase]: 7177/13018 cut-off events. [2023-08-27 09:06:48,786 INFO L125 PetriNetUnfolderBase]: For 1225050/1225050 co-relation queries the response was YES. [2023-08-27 09:06:49,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 182986 conditions, 13018 events. 7177/13018 cut-off events. For 1225050/1225050 co-relation queries the response was YES. Maximal size of possible extension queue 937. Compared 106572 event pairs, 566 based on Foata normal form. 24/13041 useless extension candidates. Maximal degree in co-relation 182707. Up to 4167 conditions per place. [2023-08-27 09:06:49,063 INFO L140 encePairwiseOnDemand]: 353/363 looper letters, 1320 selfloop transitions, 1091 changer transitions 25/2436 dead transitions. [2023-08-27 09:06:49,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 964 places, 2436 transitions, 79991 flow [2023-08-27 09:06:49,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-27 09:06:49,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-27 09:06:49,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2934 transitions. [2023-08-27 09:06:49,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2309327036599764 [2023-08-27 09:06:49,066 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2934 transitions. [2023-08-27 09:06:49,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2934 transitions. [2023-08-27 09:06:49,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:06:49,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2934 transitions. [2023-08-27 09:06:49,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 83.82857142857142) internal successors, (2934), 35 states have internal predecessors, (2934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:06:49,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 363.0) internal successors, (13068), 36 states have internal predecessors, (13068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:06:49,072 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 363.0) internal successors, (13068), 36 states have internal predecessors, (13068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:06:49,072 INFO L175 Difference]: Start difference. First operand has 930 places, 2335 transitions, 74135 flow. Second operand 35 states and 2934 transitions. [2023-08-27 09:06:49,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 964 places, 2436 transitions, 79991 flow [2023-08-27 09:07:00,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 947 places, 2436 transitions, 78541 flow, removed 27 selfloop flow, removed 17 redundant places. [2023-08-27 09:07:00,661 INFO L231 Difference]: Finished difference. Result has 947 places, 2311 transitions, 74031 flow [2023-08-27 09:07:00,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=72143, PETRI_DIFFERENCE_MINUEND_PLACES=913, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=74031, PETRI_PLACES=947, PETRI_TRANSITIONS=2311} [2023-08-27 09:07:00,662 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 924 predicate places. [2023-08-27 09:07:00,662 INFO L495 AbstractCegarLoop]: Abstraction has has 947 places, 2311 transitions, 74031 flow [2023-08-27 09:07:00,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 79.68571428571428) internal successors, (2789), 35 states have internal predecessors, (2789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:07:00,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:07:00,663 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:07:00,670 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2023-08-27 09:07:00,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:07:00,868 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:07:00,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:07:00,868 INFO L85 PathProgramCache]: Analyzing trace with hash 785486013, now seen corresponding path program 34 times [2023-08-27 09:07:00,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:07:00,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216372862] [2023-08-27 09:07:00,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:07:00,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:07:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:07:01,743 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 09:07:01,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:07:01,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216372862] [2023-08-27 09:07:01,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216372862] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:07:01,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254188120] [2023-08-27 09:07:01,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 09:07:01,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:07:01,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:07:01,745 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:07:01,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-08-27 09:07:01,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 09:07:01,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:07:01,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 09:07:01,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:07:02,161 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:07:02,161 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 48 [2023-08-27 09:07:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:07:02,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:07:02,633 INFO L322 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-08-27 09:07:02,634 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 10 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 176 [2023-08-27 09:07:02,805 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-27 09:07:02,805 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 58 [2023-08-27 09:07:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:07:02,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254188120] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:07:02,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:07:02,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 26 [2023-08-27 09:07:02,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332251069] [2023-08-27 09:07:02,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:07:02,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 09:07:02,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:07:02,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 09:07:02,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2023-08-27 09:07:02,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 09:07:02,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 947 places, 2311 transitions, 74031 flow. Second operand has 28 states, 28 states have (on average 91.75) internal successors, (2569), 28 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:07:02,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:07:02,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 09:07:02,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:07:18,826 INFO L124 PetriNetUnfolderBase]: 7860/14637 cut-off events. [2023-08-27 09:07:18,828 INFO L125 PetriNetUnfolderBase]: For 1387380/1387380 co-relation queries the response was YES. [2023-08-27 09:07:19,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 203803 conditions, 14637 events. 7860/14637 cut-off events. For 1387380/1387380 co-relation queries the response was YES. Maximal size of possible extension queue 1094. Compared 126229 event pairs, 326 based on Foata normal form. 8/14644 useless extension candidates. Maximal degree in co-relation 203523. Up to 9482 conditions per place. [2023-08-27 09:07:19,207 INFO L140 encePairwiseOnDemand]: 352/363 looper letters, 1713 selfloop transitions, 1164 changer transitions 59/2936 dead transitions. [2023-08-27 09:07:19,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1025 places, 2936 transitions, 94991 flow [2023-08-27 09:07:19,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-08-27 09:07:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-08-27 09:07:19,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 7916 transitions. [2023-08-27 09:07:19,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26273689800524413 [2023-08-27 09:07:19,212 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 7916 transitions. [2023-08-27 09:07:19,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 7916 transitions. [2023-08-27 09:07:19,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:07:19,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 7916 transitions. [2023-08-27 09:07:19,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 95.37349397590361) internal successors, (7916), 83 states have internal predecessors, (7916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:07:19,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 363.0) internal successors, (30492), 84 states have internal predecessors, (30492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:07:19,230 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 363.0) internal successors, (30492), 84 states have internal predecessors, (30492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:07:19,231 INFO L175 Difference]: Start difference. First operand has 947 places, 2311 transitions, 74031 flow. Second operand 83 states and 7916 transitions. [2023-08-27 09:07:19,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1025 places, 2936 transitions, 94991 flow [2023-08-27 09:07:33,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1004 places, 2936 transitions, 93680 flow, removed 26 selfloop flow, removed 21 redundant places. [2023-08-27 09:07:33,535 INFO L231 Difference]: Finished difference. Result has 1022 places, 2679 transitions, 88492 flow [2023-08-27 09:07:33,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=72997, PETRI_DIFFERENCE_MINUEND_PLACES=922, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=830, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=88492, PETRI_PLACES=1022, PETRI_TRANSITIONS=2679} [2023-08-27 09:07:33,537 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 999 predicate places. [2023-08-27 09:07:33,537 INFO L495 AbstractCegarLoop]: Abstraction has has 1022 places, 2679 transitions, 88492 flow [2023-08-27 09:07:33,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 91.75) internal successors, (2569), 28 states have internal predecessors, (2569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:07:33,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:07:33,538 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:07:33,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-08-27 09:07:33,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2023-08-27 09:07:33,738 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:07:33,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:07:33,739 INFO L85 PathProgramCache]: Analyzing trace with hash -968665989, now seen corresponding path program 35 times [2023-08-27 09:07:33,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:07:33,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874205551] [2023-08-27 09:07:33,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:07:33,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:07:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:07:34,443 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 09:07:34,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:07:34,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874205551] [2023-08-27 09:07:34,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874205551] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:07:34,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465069397] [2023-08-27 09:07:34,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 09:07:34,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:07:34,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:07:34,444 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:07:34,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-08-27 09:07:34,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 09:07:34,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:07:34,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-27 09:07:34,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:07:34,903 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 09:07:34,939 INFO L322 Elim1Store]: treesize reduction 49, result has 40.2 percent of original size [2023-08-27 09:07:34,940 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 184 treesize of output 143 [2023-08-27 09:07:35,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:07:35,075 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:07:35,481 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 09:07:35,481 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-27 09:07:35,619 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 09:07:35,620 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 09:07:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 09:07:35,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465069397] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:07:35,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:07:35,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 8] total 30 [2023-08-27 09:07:35,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875439399] [2023-08-27 09:07:35,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:07:35,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 09:07:35,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:07:35,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 09:07:35,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2023-08-27 09:07:35,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 363 [2023-08-27 09:07:35,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1022 places, 2679 transitions, 88492 flow. Second operand has 32 states, 32 states have (on average 98.5625) internal successors, (3154), 32 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:07:35,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:07:35,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 363 [2023-08-27 09:07:35,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:07:48,255 INFO L124 PetriNetUnfolderBase]: 7826/14559 cut-off events. [2023-08-27 09:07:48,255 INFO L125 PetriNetUnfolderBase]: For 1428156/1428156 co-relation queries the response was YES. [2023-08-27 09:07:48,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210656 conditions, 14559 events. 7826/14559 cut-off events. For 1428156/1428156 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 124714 event pairs, 1133 based on Foata normal form. 10/14568 useless extension candidates. Maximal degree in co-relation 210359. Up to 14014 conditions per place. [2023-08-27 09:07:48,574 INFO L140 encePairwiseOnDemand]: 353/363 looper letters, 2618 selfloop transitions, 145 changer transitions 14/2777 dead transitions. [2023-08-27 09:07:48,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1038 places, 2777 transitions, 95942 flow [2023-08-27 09:07:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 09:07:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 09:07:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2565 transitions. [2023-08-27 09:07:48,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28264462809917357 [2023-08-27 09:07:48,577 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2565 transitions. [2023-08-27 09:07:48,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2565 transitions. [2023-08-27 09:07:48,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:07:48,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2565 transitions. [2023-08-27 09:07:48,579 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 102.6) internal successors, (2565), 25 states have internal predecessors, (2565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:07:48,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 363.0) internal successors, (9438), 26 states have internal predecessors, (9438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:07:48,582 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 363.0) internal successors, (9438), 26 states have internal predecessors, (9438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:07:48,582 INFO L175 Difference]: Start difference. First operand has 1022 places, 2679 transitions, 88492 flow. Second operand 25 states and 2565 transitions. [2023-08-27 09:07:48,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1038 places, 2777 transitions, 95942 flow [2023-08-27 09:08:07,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 979 places, 2777 transitions, 92562 flow, removed 1339 selfloop flow, removed 59 redundant places. [2023-08-27 09:08:07,794 INFO L231 Difference]: Finished difference. Result has 984 places, 2702 transitions, 86725 flow [2023-08-27 09:08:07,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=85355, PETRI_DIFFERENCE_MINUEND_PLACES=955, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=86725, PETRI_PLACES=984, PETRI_TRANSITIONS=2702} [2023-08-27 09:08:07,795 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 961 predicate places. [2023-08-27 09:08:07,795 INFO L495 AbstractCegarLoop]: Abstraction has has 984 places, 2702 transitions, 86725 flow [2023-08-27 09:08:07,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 98.5625) internal successors, (3154), 32 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:07,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:07,796 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:07,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-08-27 09:08:08,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2023-08-27 09:08:08,001 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:08:08,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:08,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1163108399, now seen corresponding path program 36 times [2023-08-27 09:08:08,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:08,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323296425] [2023-08-27 09:08:08,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:08,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:09,321 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 09:08:09,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:09,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323296425] [2023-08-27 09:08:09,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323296425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:08:09,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317031851] [2023-08-27 09:08:09,322 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 09:08:09,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:09,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:09,323 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:08:09,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-08-27 09:08:09,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 09:08:09,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:08:09,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-27 09:08:09,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:09,831 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:08:09,831 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2023-08-27 09:08:09,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:08:09,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:08:10,233 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 09:08:10,234 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 122 [2023-08-27 09:08:10,409 INFO L322 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-08-27 09:08:10,409 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 10 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 176 [2023-08-27 09:08:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:08:10,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317031851] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:08:10,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:08:10,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 7] total 27 [2023-08-27 09:08:10,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791160186] [2023-08-27 09:08:10,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:08:10,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-08-27 09:08:10,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:10,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-08-27 09:08:10,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2023-08-27 09:08:10,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 09:08:10,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 984 places, 2702 transitions, 86725 flow. Second operand has 29 states, 29 states have (on average 91.6896551724138) internal successors, (2659), 29 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:10,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:10,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 09:08:10,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:08:28,372 INFO L124 PetriNetUnfolderBase]: 8269/15316 cut-off events. [2023-08-27 09:08:28,372 INFO L125 PetriNetUnfolderBase]: For 1332570/1332570 co-relation queries the response was YES. [2023-08-27 09:08:28,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212585 conditions, 15316 events. 8269/15316 cut-off events. For 1332570/1332570 co-relation queries the response was YES. Maximal size of possible extension queue 1098. Compared 131626 event pairs, 225 based on Foata normal form. 6/15321 useless extension candidates. Maximal degree in co-relation 212302. Up to 9547 conditions per place. [2023-08-27 09:08:28,700 INFO L140 encePairwiseOnDemand]: 352/363 looper letters, 1702 selfloop transitions, 1331 changer transitions 25/3058 dead transitions. [2023-08-27 09:08:28,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1042 places, 3058 transitions, 99698 flow [2023-08-27 09:08:28,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-27 09:08:28,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-27 09:08:28,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 6093 transitions. [2023-08-27 09:08:28,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.26226756198347106 [2023-08-27 09:08:28,704 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 6093 transitions. [2023-08-27 09:08:28,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 6093 transitions. [2023-08-27 09:08:28,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:08:28,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 6093 transitions. [2023-08-27 09:08:28,708 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 95.203125) internal successors, (6093), 64 states have internal predecessors, (6093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:28,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 363.0) internal successors, (23595), 65 states have internal predecessors, (23595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:28,815 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 363.0) internal successors, (23595), 65 states have internal predecessors, (23595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:28,815 INFO L175 Difference]: Start difference. First operand has 984 places, 2702 transitions, 86725 flow. Second operand 64 states and 6093 transitions. [2023-08-27 09:08:28,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1042 places, 3058 transitions, 99698 flow [2023-08-27 09:08:44,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1028 places, 3058 transitions, 99393 flow, removed 66 selfloop flow, removed 14 redundant places. [2023-08-27 09:08:44,337 INFO L231 Difference]: Finished difference. Result has 1039 places, 2862 transitions, 95459 flow [2023-08-27 09:08:44,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=86438, PETRI_DIFFERENCE_MINUEND_PLACES=965, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=95459, PETRI_PLACES=1039, PETRI_TRANSITIONS=2862} [2023-08-27 09:08:44,338 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 1016 predicate places. [2023-08-27 09:08:44,338 INFO L495 AbstractCegarLoop]: Abstraction has has 1039 places, 2862 transitions, 95459 flow [2023-08-27 09:08:44,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 91.6896551724138) internal successors, (2659), 29 states have internal predecessors, (2659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:44,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:08:44,339 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:08:44,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-08-27 09:08:44,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2023-08-27 09:08:44,546 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:08:44,546 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:08:44,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1144674373, now seen corresponding path program 37 times [2023-08-27 09:08:44,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:08:44,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944483349] [2023-08-27 09:08:44,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:08:44,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:08:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:45,310 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 09:08:45,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:08:45,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944483349] [2023-08-27 09:08:45,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944483349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:08:45,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449830904] [2023-08-27 09:08:45,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 09:08:45,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:08:45,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:08:45,312 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:08:45,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2023-08-27 09:08:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:08:45,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-27 09:08:45,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:08:45,727 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:08:45,728 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 44 [2023-08-27 09:08:45,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:08:45,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:08:46,099 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 09:08:46,100 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 43 treesize of output 122 [2023-08-27 09:08:46,280 INFO L322 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2023-08-27 09:08:46,281 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 10 new quantified variables, introduced 15 case distinctions, treesize of input 71 treesize of output 176 [2023-08-27 09:08:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-27 09:08:46,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449830904] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:08:46,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:08:46,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 26 [2023-08-27 09:08:46,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465318008] [2023-08-27 09:08:46,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:08:46,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-08-27 09:08:46,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:08:46,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-08-27 09:08:46,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2023-08-27 09:08:46,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 363 [2023-08-27 09:08:46,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1039 places, 2862 transitions, 95459 flow. Second operand has 28 states, 28 states have (on average 98.75) internal successors, (2765), 28 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:08:46,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:08:46,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 363 [2023-08-27 09:08:46,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:09:05,381 INFO L124 PetriNetUnfolderBase]: 8427/15618 cut-off events. [2023-08-27 09:09:05,381 INFO L125 PetriNetUnfolderBase]: For 1497831/1497831 co-relation queries the response was YES. [2023-08-27 09:09:05,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 227525 conditions, 15618 events. 8427/15618 cut-off events. For 1497831/1497831 co-relation queries the response was YES. Maximal size of possible extension queue 1112. Compared 134497 event pairs, 206 based on Foata normal form. 6/15623 useless extension candidates. Maximal degree in co-relation 227233. Up to 10609 conditions per place. [2023-08-27 09:09:05,717 INFO L140 encePairwiseOnDemand]: 352/363 looper letters, 1913 selfloop transitions, 1157 changer transitions 34/3104 dead transitions. [2023-08-27 09:09:05,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1091 places, 3104 transitions, 106513 flow [2023-08-27 09:09:05,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-27 09:09:05,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-27 09:09:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 6347 transitions. [2023-08-27 09:09:05,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2820136852394917 [2023-08-27 09:09:05,721 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 6347 transitions. [2023-08-27 09:09:05,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 6347 transitions. [2023-08-27 09:09:05,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:09:05,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 6347 transitions. [2023-08-27 09:09:05,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 102.37096774193549) internal successors, (6347), 62 states have internal predecessors, (6347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:09:05,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 363.0) internal successors, (22869), 63 states have internal predecessors, (22869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:09:05,734 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 363.0) internal successors, (22869), 63 states have internal predecessors, (22869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:09:05,734 INFO L175 Difference]: Start difference. First operand has 1039 places, 2862 transitions, 95459 flow. Second operand 62 states and 6347 transitions. [2023-08-27 09:09:05,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1091 places, 3104 transitions, 106513 flow [2023-08-27 09:09:29,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1054 places, 3104 transitions, 104777 flow, removed 642 selfloop flow, removed 37 redundant places. [2023-08-27 09:09:29,212 INFO L231 Difference]: Finished difference. Result has 1070 places, 2935 transitions, 101205 flow [2023-08-27 09:09:29,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=94170, PETRI_DIFFERENCE_MINUEND_PLACES=993, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1084, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1738, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=101205, PETRI_PLACES=1070, PETRI_TRANSITIONS=2935} [2023-08-27 09:09:29,214 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 1047 predicate places. [2023-08-27 09:09:29,214 INFO L495 AbstractCegarLoop]: Abstraction has has 1070 places, 2935 transitions, 101205 flow [2023-08-27 09:09:29,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 98.75) internal successors, (2765), 28 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:09:29,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:09:29,214 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:09:29,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2023-08-27 09:09:29,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2023-08-27 09:09:29,420 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:09:29,420 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:09:29,420 INFO L85 PathProgramCache]: Analyzing trace with hash -132668497, now seen corresponding path program 38 times [2023-08-27 09:09:29,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:09:29,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325246270] [2023-08-27 09:09:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:09:29,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:09:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:09:30,580 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 09:09:30,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:09:30,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325246270] [2023-08-27 09:09:30,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325246270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:09:30,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715473684] [2023-08-27 09:09:30,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 09:09:30,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:09:30,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:09:30,581 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:09:30,583 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2023-08-27 09:09:30,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 09:09:30,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:09:30,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-27 09:09:30,745 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:09:30,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 09:09:30,955 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 20 [2023-08-27 09:09:31,099 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:09:31,100 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 118 [2023-08-27 09:09:31,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 09:09:31,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:09:31,722 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:09:31,722 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 108 [2023-08-27 09:09:31,730 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:09:31,730 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 28 [2023-08-27 09:09:31,806 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 09:09:31,838 INFO L322 Elim1Store]: treesize reduction 74, result has 29.5 percent of original size [2023-08-27 09:09:31,838 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 61 [2023-08-27 09:09:31,949 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 09:09:31,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715473684] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:09:31,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:09:31,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 10] total 33 [2023-08-27 09:09:31,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455125320] [2023-08-27 09:09:31,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:09:31,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 09:09:31,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:09:31,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 09:09:31,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1024, Unknown=2, NotChecked=0, Total=1190 [2023-08-27 09:09:31,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 363 [2023-08-27 09:09:31,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1070 places, 2935 transitions, 101205 flow. Second operand has 35 states, 35 states have (on average 91.42857142857143) internal successors, (3200), 35 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:09:31,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:09:31,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 363 [2023-08-27 09:09:31,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 09:09:49,435 INFO L124 PetriNetUnfolderBase]: 8547/15805 cut-off events. [2023-08-27 09:09:49,435 INFO L125 PetriNetUnfolderBase]: For 1505392/1505392 co-relation queries the response was YES. [2023-08-27 09:09:49,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235172 conditions, 15805 events. 8547/15805 cut-off events. For 1505392/1505392 co-relation queries the response was YES. Maximal size of possible extension queue 1132. Compared 135945 event pairs, 862 based on Foata normal form. 14/15818 useless extension candidates. Maximal degree in co-relation 234868. Up to 14331 conditions per place. [2023-08-27 09:09:49,795 INFO L140 encePairwiseOnDemand]: 353/363 looper letters, 2632 selfloop transitions, 455 changer transitions 16/3103 dead transitions. [2023-08-27 09:09:49,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1094 places, 3103 transitions, 111478 flow [2023-08-27 09:09:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-27 09:09:49,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-27 09:09:49,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3060 transitions. [2023-08-27 09:09:49,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2634297520661157 [2023-08-27 09:09:49,797 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3060 transitions. [2023-08-27 09:09:49,797 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3060 transitions. [2023-08-27 09:09:49,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 09:09:49,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3060 transitions. [2023-08-27 09:09:49,799 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 95.625) internal successors, (3060), 32 states have internal predecessors, (3060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:09:49,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 363.0) internal successors, (11979), 33 states have internal predecessors, (11979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:09:49,804 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 363.0) internal successors, (11979), 33 states have internal predecessors, (11979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:09:49,804 INFO L175 Difference]: Start difference. First operand has 1070 places, 2935 transitions, 101205 flow. Second operand 32 states and 3060 transitions. [2023-08-27 09:09:49,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1094 places, 3103 transitions, 111478 flow [2023-08-27 09:10:11,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1066 places, 3103 transitions, 110144 flow, removed 533 selfloop flow, removed 28 redundant places. [2023-08-27 09:10:11,440 INFO L231 Difference]: Finished difference. Result has 1071 places, 3002 transitions, 103972 flow [2023-08-27 09:10:11,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=363, PETRI_DIFFERENCE_MINUEND_FLOW=99740, PETRI_DIFFERENCE_MINUEND_PLACES=1035, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2929, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=103972, PETRI_PLACES=1071, PETRI_TRANSITIONS=3002} [2023-08-27 09:10:11,441 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 1048 predicate places. [2023-08-27 09:10:11,441 INFO L495 AbstractCegarLoop]: Abstraction has has 1071 places, 3002 transitions, 103972 flow [2023-08-27 09:10:11,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 91.42857142857143) internal successors, (3200), 35 states have internal predecessors, (3200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:10:11,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 09:10:11,442 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 09:10:11,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2023-08-27 09:10:11,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:10:11,647 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 2 more)] === [2023-08-27 09:10:11,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 09:10:11,647 INFO L85 PathProgramCache]: Analyzing trace with hash 773826497, now seen corresponding path program 39 times [2023-08-27 09:10:11,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 09:10:11,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273416331] [2023-08-27 09:10:11,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 09:10:11,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 09:10:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 09:10:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 09:10:11,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 09:10:11,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273416331] [2023-08-27 09:10:11,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273416331] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 09:10:11,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422915058] [2023-08-27 09:10:11,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 09:10:11,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:10:11,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 09:10:11,889 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-27 09:10:11,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2023-08-27 09:10:12,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 09:10:12,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 09:10:12,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 33 conjunts are in the unsatisfiable core [2023-08-27 09:10:12,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 09:10:12,265 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 09:10:12,266 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 74 [2023-08-27 09:10:12,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 09:10:12,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 09:10:12,652 INFO L322 Elim1Store]: treesize reduction 10, result has 90.5 percent of original size [2023-08-27 09:10:12,653 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 63 treesize of output 125 [2023-08-27 09:10:12,753 INFO L322 Elim1Store]: treesize reduction 10, result has 84.6 percent of original size [2023-08-27 09:10:12,753 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 35 treesize of output 74 [2023-08-27 09:10:12,824 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 09:10:12,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422915058] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 09:10:12,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 09:10:12,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 20 [2023-08-27 09:10:12,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458623644] [2023-08-27 09:10:12,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 09:10:12,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 09:10:12,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 09:10:12,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 09:10:12,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2023-08-27 09:10:12,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 363 [2023-08-27 09:10:12,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1071 places, 3002 transitions, 103972 flow. Second operand has 22 states, 22 states have (on average 112.77272727272727) internal successors, (2481), 22 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 09:10:12,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 09:10:12,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 363 [2023-08-27 09:10:12,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-27 09:10:26,602 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 09:10:26,602 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 09:10:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-27 09:10:26,834 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (4 of 5 remaining) [2023-08-27 09:10:26,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2023-08-27 09:10:27,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 09:10:27,041 WARN L619 AbstractCegarLoop]: Verification canceled: while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 111/363 universal loopers) in iteration 79,while PetriNetUnfolder was constructing finite prefix that currently has 225660 conditions, 15234 events (8344/15233 cut-off events. For 1426281/1426281 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 131563 event pairs, 1164 based on Foata normal form. 1/15445 useless extension candidates. Maximal degree in co-relation 225357. Up to 14686 conditions per place.). [2023-08-27 09:10:27,053 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 5 remaining) [2023-08-27 09:10:27,053 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 5 remaining) [2023-08-27 09:10:27,053 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2023-08-27 09:10:27,053 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2023-08-27 09:10:27,053 INFO L445 BasicCegarLoop]: Path program histogram: [39, 18, 11, 6, 2, 1, 1, 1] [2023-08-27 09:10:27,055 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-27 09:10:27,055 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-27 09:10:27,057 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:10:27 BasicIcfg [2023-08-27 09:10:27,057 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-27 09:10:27,057 INFO L158 Benchmark]: Toolchain (without parser) took 830586.29ms. Allocated memory was 343.9MB in the beginning and 7.7GB in the end (delta: 7.3GB). Free memory was 320.8MB in the beginning and 6.2GB in the end (delta: -5.9GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. [2023-08-27 09:10:27,057 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 343.9MB. Free memory is still 320.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-27 09:10:27,057 INFO L158 Benchmark]: CACSL2BoogieTranslator took 210.70ms. Allocated memory is still 343.9MB. Free memory was 320.3MB in the beginning and 309.1MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-08-27 09:10:27,057 INFO L158 Benchmark]: Boogie Procedure Inliner took 42.27ms. Allocated memory is still 343.9MB. Free memory was 309.1MB in the beginning and 307.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 09:10:27,057 INFO L158 Benchmark]: Boogie Preprocessor took 32.71ms. Allocated memory is still 343.9MB. Free memory was 307.1MB in the beginning and 305.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-27 09:10:27,057 INFO L158 Benchmark]: RCFGBuilder took 436.84ms. Allocated memory is still 343.9MB. Free memory was 305.6MB in the beginning and 288.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-27 09:10:27,057 INFO L158 Benchmark]: TraceAbstraction took 829858.57ms. Allocated memory was 343.9MB in the beginning and 7.7GB in the end (delta: 7.3GB). Free memory was 288.2MB in the beginning and 6.2GB in the end (delta: -5.9GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. [2023-08-27 09:10:27,058 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 343.9MB. Free memory is still 320.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 210.70ms. Allocated memory is still 343.9MB. Free memory was 320.3MB in the beginning and 309.1MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 42.27ms. Allocated memory is still 343.9MB. Free memory was 309.1MB in the beginning and 307.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 32.71ms. Allocated memory is still 343.9MB. Free memory was 307.1MB in the beginning and 305.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 436.84ms. Allocated memory is still 343.9MB. Free memory was 305.6MB in the beginning and 288.8MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 829858.57ms. Allocated memory was 343.9MB in the beginning and 7.7GB in the end (delta: 7.3GB). Free memory was 288.2MB in the beginning and 6.2GB in the end (delta: -5.9GB). Peak memory consumption was 5.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.4s, 153 PlacesBefore, 23 PlacesAfterwards, 161 TransitionsBefore, 19 TransitionsAfterwards, 2692 CoEnabledTransitionPairs, 7 FixpointIterations, 72 TrivialSequentialCompositions, 58 ConcurrentSequentialCompositions, 20 TrivialYvCompositions, 29 ConcurrentYvCompositions, 12 ChoiceCompositions, 191 TotalNumberOfCompositions, 2722 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2683, independent: 2674, independent conditional: 0, independent unconditional: 2674, dependent: 9, dependent conditional: 0, dependent unconditional: 9, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1648, independent: 1643, independent conditional: 0, independent unconditional: 1643, dependent: 5, dependent conditional: 0, dependent unconditional: 5, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2683, independent: 1031, independent conditional: 0, independent unconditional: 1031, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 1648, unknown conditional: 0, unknown unconditional: 1648] , Statistics on independence cache: Total cache size (in pairs): 21, Positive cache size: 20, Positive conditional cache size: 0, Positive unconditional cache size: 20, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 21]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 111/363 universal loopers) in iteration 79,while PetriNetUnfolder was constructing finite prefix that currently has 225660 conditions, 15234 events (8344/15233 cut-off events. For 1426281/1426281 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 131563 event pairs, 1164 based on Foata normal form. 1/15445 useless extension candidates. Maximal degree in co-relation 225357. Up to 14686 conditions per place.). - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 111/363 universal loopers) in iteration 79,while PetriNetUnfolder was constructing finite prefix that currently has 225660 conditions, 15234 events (8344/15233 cut-off events. For 1426281/1426281 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 131563 event pairs, 1164 based on Foata normal form. 1/15445 useless extension candidates. Maximal degree in co-relation 225357. Up to 14686 conditions per place.). - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that integer overflow can never occur Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 111/363 universal loopers) in iteration 79,while PetriNetUnfolder was constructing finite prefix that currently has 225660 conditions, 15234 events (8344/15233 cut-off events. For 1426281/1426281 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 131563 event pairs, 1164 based on Foata normal form. 1/15445 useless extension candidates. Maximal degree in co-relation 225357. Up to 14686 conditions per place.). - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 111/363 universal loopers) in iteration 79,while PetriNetUnfolder was constructing finite prefix that currently has 225660 conditions, 15234 events (8344/15233 cut-off events. For 1426281/1426281 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 131563 event pairs, 1164 based on Foata normal form. 1/15445 useless extension candidates. Maximal degree in co-relation 225357. Up to 14686 conditions per place.). - TimeoutResultAtElement [Line: 86]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while CegarLoopForPetriNet was enhancing Floyd-Hoare automaton (22states, 111/363 universal loopers) in iteration 79,while PetriNetUnfolder was constructing finite prefix that currently has 225660 conditions, 15234 events (8344/15233 cut-off events. For 1426281/1426281 co-relation queries the response was YES. Maximal size of possible extension queue 1143. Compared 131563 event pairs, 1164 based on Foata normal form. 1/15445 useless extension candidates. Maximal degree in co-relation 225357. Up to 14686 conditions per place.). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 219 locations, 5 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: 829.7s, OverallIterations: 79, TraceHistogramMax: 4, PathProgramHistogramMax: 39, EmptinessCheckTime: 0.0s, AutomataDifference: 703.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 129 mSolverCounterUnknown, 10607 SdHoareTripleChecker+Valid, 54.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10607 mSDsluCounter, 2652 SdHoareTripleChecker+Invalid, 48.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2289 mSDsCounter, 1916 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 55180 IncrementalHoareTripleChecker+Invalid, 57225 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1916 mSolverCounterUnsat, 363 mSDtfsCounter, 55180 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4662 GetRequests, 1914 SyntacticMatches, 20 SemanticMatches, 2728 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31212 ImplicationChecksByTransitivity, 157.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=103972occurred in iteration=78, InterpolantAutomatonStates: 1976, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 4.0s SatisfiabilityAnalysisTime, 97.1s InterpolantComputationTime, 2632 NumberOfCodeBlocks, 2615 NumberOfCodeBlocksAsserted, 218 NumberOfCheckSat, 3654 ConstructedInterpolants, 67 QuantifiedInterpolants, 69071 SizeOfPredicates, 1289 NumberOfNonLiveVariables, 12910 ConjunctsInSsa, 1941 ConjunctsInUnsatCore, 217 InterpolantComputations, 11 PerfectInterpolantSequences, 439/1348 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