/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true -i ../../../trunk/examples/svcomp/weaver/test-context1.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-27 02:07:08,963 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-27 02:07:09,047 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 02:07:09,053 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-27 02:07:09,053 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-27 02:07:09,080 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-27 02:07:09,080 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-27 02:07:09,081 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-27 02:07:09,081 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-27 02:07:09,085 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-27 02:07:09,085 INFO L153 SettingsManager]: * Use SBE=true [2023-08-27 02:07:09,085 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-27 02:07:09,085 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-27 02:07:09,087 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-27 02:07:09,087 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-27 02:07:09,087 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-27 02:07:09,087 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-27 02:07:09,087 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-27 02:07:09,087 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-27 02:07:09,088 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-27 02:07:09,088 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-27 02:07:09,089 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-27 02:07:09,089 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-27 02:07:09,089 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-27 02:07:09,090 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-27 02:07:09,090 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-27 02:07:09,090 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-27 02:07:09,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 02:07:09,091 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-27 02:07:09,091 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-27 02:07:09,092 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-27 02:07:09,092 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-27 02:07:09,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-27 02:07:09,092 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-27 02:07:09,092 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-27 02:07:09,093 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2023-08-27 02:07:09,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-27 02:07:09,403 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-27 02:07:09,405 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-27 02:07:09,406 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-27 02:07:09,406 INFO L274 PluginConnector]: CDTParser initialized [2023-08-27 02:07:09,408 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-08-27 02:07:10,589 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-27 02:07:10,833 INFO L384 CDTParser]: Found 1 translation units. [2023-08-27 02:07:10,833 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-context1.wvr.c [2023-08-27 02:07:10,838 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae8ecc942/3cb5eb7e5e1d475ea2361c81daf2d6d9/FLAGfb966f1f6 [2023-08-27 02:07:10,853 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae8ecc942/3cb5eb7e5e1d475ea2361c81daf2d6d9 [2023-08-27 02:07:10,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-27 02:07:10,856 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-27 02:07:10,857 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-27 02:07:10,857 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-27 02:07:10,859 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-27 02:07:10,860 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:07:10" (1/1) ... [2023-08-27 02:07:10,861 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5534e032 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:07:10, skipping insertion in model container [2023-08-27 02:07:10,861 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 02:07:10" (1/1) ... [2023-08-27 02:07:10,878 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-27 02:07:11,010 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 02:07:11,018 INFO L201 MainTranslator]: Completed pre-run [2023-08-27 02:07:11,037 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-27 02:07:11,043 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 02:07:11,044 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-27 02:07:11,050 INFO L206 MainTranslator]: Completed translation [2023-08-27 02:07:11,050 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:07:11 WrapperNode [2023-08-27 02:07:11,050 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-27 02:07:11,051 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-27 02:07:11,051 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-27 02:07:11,051 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-27 02:07:11,057 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:07:11" (1/1) ... [2023-08-27 02:07:11,064 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:07:11" (1/1) ... [2023-08-27 02:07:11,085 INFO L138 Inliner]: procedures = 24, calls = 35, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 156 [2023-08-27 02:07:11,086 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-27 02:07:11,086 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-27 02:07:11,086 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-27 02:07:11,087 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-27 02:07:11,094 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:07:11" (1/1) ... [2023-08-27 02:07:11,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:07:11" (1/1) ... [2023-08-27 02:07:11,097 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:07:11" (1/1) ... [2023-08-27 02:07:11,097 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:07:11" (1/1) ... [2023-08-27 02:07:11,103 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:07:11" (1/1) ... [2023-08-27 02:07:11,106 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:07:11" (1/1) ... [2023-08-27 02:07:11,107 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:07:11" (1/1) ... [2023-08-27 02:07:11,108 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:07:11" (1/1) ... [2023-08-27 02:07:11,110 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-27 02:07:11,111 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-27 02:07:11,111 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-27 02:07:11,111 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-27 02:07:11,112 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:07:11" (1/1) ... [2023-08-27 02:07:11,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-27 02:07:11,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:11,138 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 02:07:11,149 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 02:07:11,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-27 02:07:11,175 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-27 02:07:11,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-27 02:07:11,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-27 02:07:11,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-27 02:07:11,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-27 02:07:11,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-27 02:07:11,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-27 02:07:11,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-27 02:07:11,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-27 02:07:11,176 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-27 02:07:11,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-27 02:07:11,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-27 02:07:11,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-27 02:07:11,177 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-27 02:07:11,178 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 02:07:11,284 INFO L236 CfgBuilder]: Building ICFG [2023-08-27 02:07:11,292 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-27 02:07:11,625 INFO L277 CfgBuilder]: Performing block encoding [2023-08-27 02:07:11,898 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-27 02:07:11,899 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-27 02:07:11,901 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:07:11 BoogieIcfgContainer [2023-08-27 02:07:11,902 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-27 02:07:11,903 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-27 02:07:11,903 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-27 02:07:11,910 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-27 02:07:11,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 02:07:10" (1/3) ... [2023-08-27 02:07:11,911 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9b3583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:07:11, skipping insertion in model container [2023-08-27 02:07:11,911 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 02:07:11" (2/3) ... [2023-08-27 02:07:11,912 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c9b3583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 02:07:11, skipping insertion in model container [2023-08-27 02:07:11,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 02:07:11" (3/3) ... [2023-08-27 02:07:11,913 INFO L112 eAbstractionObserver]: Analyzing ICFG test-context1.wvr.c [2023-08-27 02:07:11,927 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-27 02:07:11,927 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2023-08-27 02:07:11,927 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-27 02:07:12,006 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-27 02:07:12,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 128 transitions, 272 flow [2023-08-27 02:07:12,085 INFO L124 PetriNetUnfolderBase]: 9/126 cut-off events. [2023-08-27 02:07:12,086 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 02:07:12,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135 conditions, 126 events. 9/126 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 131 event pairs, 0 based on Foata normal form. 0/102 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-27 02:07:12,090 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 128 transitions, 272 flow [2023-08-27 02:07:12,094 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 115 places, 117 transitions, 246 flow [2023-08-27 02:07:12,100 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-27 02:07:12,107 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 115 places, 117 transitions, 246 flow [2023-08-27 02:07:12,109 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 115 places, 117 transitions, 246 flow [2023-08-27 02:07:12,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 115 places, 117 transitions, 246 flow [2023-08-27 02:07:12,133 INFO L124 PetriNetUnfolderBase]: 9/117 cut-off events. [2023-08-27 02:07:12,134 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-27 02:07:12,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 117 events. 9/117 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 128 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 89. Up to 2 conditions per place. [2023-08-27 02:07:12,136 INFO L119 LiptonReduction]: Number of co-enabled transitions 904 [2023-08-27 02:07:16,821 INFO L134 LiptonReduction]: Checked pairs total: 1487 [2023-08-27 02:07:16,821 INFO L136 LiptonReduction]: Total number of compositions: 133 [2023-08-27 02:07:16,832 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-27 02:07:16,836 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;@521a3c4a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-27 02:07:16,836 INFO L358 AbstractCegarLoop]: Starting to check reachability of 29 error locations. [2023-08-27 02:07:16,839 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-27 02:07:16,839 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-08-27 02:07:16,839 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-27 02:07:16,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:16,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-27 02:07:16,840 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:16,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:16,845 INFO L85 PathProgramCache]: Analyzing trace with hash 20985, now seen corresponding path program 1 times [2023-08-27 02:07:16,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:16,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978120957] [2023-08-27 02:07:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:16,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:16,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:17,086 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 02:07:17,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:17,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978120957] [2023-08-27 02:07:17,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978120957] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:07:17,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:07:17,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 02:07:17,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448853404] [2023-08-27 02:07:17,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:07:17,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 02:07:17,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:17,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 02:07:17,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 02:07:17,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 261 [2023-08-27 02:07:17,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:17,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:17,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 261 [2023-08-27 02:07:17,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:17,199 INFO L124 PetriNetUnfolderBase]: 95/170 cut-off events. [2023-08-27 02:07:17,199 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2023-08-27 02:07:17,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 170 events. 95/170 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 519 event pairs, 69 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 300. Up to 170 conditions per place. [2023-08-27 02:07:17,202 INFO L140 encePairwiseOnDemand]: 250/261 looper letters, 22 selfloop transitions, 3 changer transitions 0/25 dead transitions. [2023-08-27 02:07:17,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 112 flow [2023-08-27 02:07:17,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:07:17,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:07:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 321 transitions. [2023-08-27 02:07:17,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4099616858237548 [2023-08-27 02:07:17,215 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 321 transitions. [2023-08-27 02:07:17,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 321 transitions. [2023-08-27 02:07:17,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:17,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 321 transitions. [2023-08-27 02:07:17,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:17,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:17,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:17,228 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 70 flow. Second operand 3 states and 321 transitions. [2023-08-27 02:07:17,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 112 flow [2023-08-27 02:07:17,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 25 transitions, 104 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-27 02:07:17,231 INFO L231 Difference]: Finished difference. Result has 26 places, 25 transitions, 71 flow [2023-08-27 02:07:17,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2023-08-27 02:07:17,236 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -7 predicate places. [2023-08-27 02:07:17,236 INFO L495 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 71 flow [2023-08-27 02:07:17,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:17,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:17,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-27 02:07:17,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-27 02:07:17,237 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:17,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:17,238 INFO L85 PathProgramCache]: Analyzing trace with hash 651339, now seen corresponding path program 1 times [2023-08-27 02:07:17,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:17,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802567544] [2023-08-27 02:07:17,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:17,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:17,314 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 02:07:17,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:17,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802567544] [2023-08-27 02:07:17,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802567544] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:17,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440673318] [2023-08-27 02:07:17,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:17,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:17,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:17,321 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 02:07:17,374 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 02:07:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:17,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 02:07:17,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:17,485 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 02:07:17,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:17,505 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 02:07:17,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440673318] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:17,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:17,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 02:07:17,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501107424] [2023-08-27 02:07:17,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:17,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 02:07:17,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:17,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 02:07:17,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 02:07:17,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 261 [2023-08-27 02:07:17,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 71 flow. Second operand has 7 states, 7 states have (on average 97.14285714285714) internal successors, (680), 7 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:17,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:17,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 261 [2023-08-27 02:07:17,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:17,633 INFO L124 PetriNetUnfolderBase]: 101/179 cut-off events. [2023-08-27 02:07:17,633 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-27 02:07:17,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 179 events. 101/179 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 551 event pairs, 69 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 333. Up to 172 conditions per place. [2023-08-27 02:07:17,636 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 21 selfloop transitions, 13 changer transitions 0/34 dead transitions. [2023-08-27 02:07:17,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 175 flow [2023-08-27 02:07:17,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 02:07:17,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 02:07:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 709 transitions. [2023-08-27 02:07:17,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880678708264915 [2023-08-27 02:07:17,642 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 709 transitions. [2023-08-27 02:07:17,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 709 transitions. [2023-08-27 02:07:17,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:17,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 709 transitions. [2023-08-27 02:07:17,648 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 101.28571428571429) internal successors, (709), 7 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:17,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:17,654 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:17,658 INFO L175 Difference]: Start difference. First operand has 26 places, 25 transitions, 71 flow. Second operand 7 states and 709 transitions. [2023-08-27 02:07:17,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 175 flow [2023-08-27 02:07:17,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 34 transitions, 170 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-27 02:07:17,659 INFO L231 Difference]: Finished difference. Result has 34 places, 34 transitions, 150 flow [2023-08-27 02:07:17,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=150, PETRI_PLACES=34, PETRI_TRANSITIONS=34} [2023-08-27 02:07:17,660 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 1 predicate places. [2023-08-27 02:07:17,660 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 34 transitions, 150 flow [2023-08-27 02:07:17,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 97.14285714285714) internal successors, (680), 7 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:17,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:17,661 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-27 02:07:17,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-27 02:07:17,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:17,868 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:17,869 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:17,869 INFO L85 PathProgramCache]: Analyzing trace with hash 20192312, now seen corresponding path program 1 times [2023-08-27 02:07:17,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:17,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141167608] [2023-08-27 02:07:17,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:17,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:17,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:17,950 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 02:07:17,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:17,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141167608] [2023-08-27 02:07:17,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141167608] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:17,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077363997] [2023-08-27 02:07:17,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:17,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:17,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:17,952 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 02:07:17,964 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 02:07:18,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:18,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 02:07:18,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:18,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:07:18,050 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 02:07:18,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077363997] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:07:18,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 02:07:18,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2023-08-27 02:07:18,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654453037] [2023-08-27 02:07:18,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:07:18,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-27 02:07:18,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:18,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-27 02:07:18,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-27 02:07:18,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 261 [2023-08-27 02:07:18,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 34 transitions, 150 flow. Second operand has 5 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:18,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 261 [2023-08-27 02:07:18,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:18,129 INFO L124 PetriNetUnfolderBase]: 98/175 cut-off events. [2023-08-27 02:07:18,129 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-27 02:07:18,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395 conditions, 175 events. 98/175 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 525 event pairs, 69 based on Foata normal form. 0/81 useless extension candidates. Maximal degree in co-relation 359. Up to 169 conditions per place. [2023-08-27 02:07:18,131 INFO L140 encePairwiseOnDemand]: 257/261 looper letters, 22 selfloop transitions, 8 changer transitions 0/30 dead transitions. [2023-08-27 02:07:18,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 183 flow [2023-08-27 02:07:18,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 02:07:18,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 02:07:18,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 508 transitions. [2023-08-27 02:07:18,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.389272030651341 [2023-08-27 02:07:18,133 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 508 transitions. [2023-08-27 02:07:18,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 508 transitions. [2023-08-27 02:07:18,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:18,134 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 508 transitions. [2023-08-27 02:07:18,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 101.6) internal successors, (508), 5 states have internal predecessors, (508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,138 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,138 INFO L175 Difference]: Start difference. First operand has 34 places, 34 transitions, 150 flow. Second operand 5 states and 508 transitions. [2023-08-27 02:07:18,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 183 flow [2023-08-27 02:07:18,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 162 flow, removed 9 selfloop flow, removed 1 redundant places. [2023-08-27 02:07:18,140 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 118 flow [2023-08-27 02:07:18,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-27 02:07:18,140 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-08-27 02:07:18,141 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 118 flow [2023-08-27 02:07:18,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 96.8) internal successors, (484), 5 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:18,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-27 02:07:18,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-27 02:07:18,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-27 02:07:18,347 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:18,347 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:18,348 INFO L85 PathProgramCache]: Analyzing trace with hash 20179508, now seen corresponding path program 1 times [2023-08-27 02:07:18,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:18,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688110703] [2023-08-27 02:07:18,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:18,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:18,392 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 02:07:18,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:18,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688110703] [2023-08-27 02:07:18,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688110703] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:07:18,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:07:18,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 02:07:18,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877473800] [2023-08-27 02:07:18,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:07:18,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 02:07:18,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:18,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 02:07:18,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 02:07:18,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 261 [2023-08-27 02:07:18,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:18,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 261 [2023-08-27 02:07:18,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:18,461 INFO L124 PetriNetUnfolderBase]: 112/207 cut-off events. [2023-08-27 02:07:18,461 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2023-08-27 02:07:18,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 460 conditions, 207 events. 112/207 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 745 event pairs, 33 based on Foata normal form. 0/109 useless extension candidates. Maximal degree in co-relation 426. Up to 169 conditions per place. [2023-08-27 02:07:18,464 INFO L140 encePairwiseOnDemand]: 252/261 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-27 02:07:18,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 221 flow [2023-08-27 02:07:18,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:07:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:07:18,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 342 transitions. [2023-08-27 02:07:18,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367816091954023 [2023-08-27 02:07:18,466 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 342 transitions. [2023-08-27 02:07:18,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 342 transitions. [2023-08-27 02:07:18,466 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:18,466 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 342 transitions. [2023-08-27 02:07:18,467 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,469 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,469 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,469 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 118 flow. Second operand 3 states and 342 transitions. [2023-08-27 02:07:18,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 221 flow [2023-08-27 02:07:18,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 40 transitions, 209 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-27 02:07:18,471 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 130 flow [2023-08-27 02:07:18,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-27 02:07:18,472 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-08-27 02:07:18,472 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 130 flow [2023-08-27 02:07:18,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.33333333333333) internal successors, (307), 3 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:18,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 02:07:18,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-27 02:07:18,473 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:18,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:18,474 INFO L85 PathProgramCache]: Analyzing trace with hash 625565178, now seen corresponding path program 1 times [2023-08-27 02:07:18,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:18,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826963764] [2023-08-27 02:07:18,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:18,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:18,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:07:18,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:18,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826963764] [2023-08-27 02:07:18,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826963764] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:07:18,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:07:18,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 02:07:18,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700973501] [2023-08-27 02:07:18,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:07:18,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 02:07:18,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:18,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 02:07:18,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 02:07:18,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 261 [2023-08-27 02:07:18,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 130 flow. Second operand has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:18,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 261 [2023-08-27 02:07:18,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:18,641 INFO L124 PetriNetUnfolderBase]: 136/249 cut-off events. [2023-08-27 02:07:18,641 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2023-08-27 02:07:18,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 249 events. 136/249 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 856 event pairs, 47 based on Foata normal form. 0/177 useless extension candidates. Maximal degree in co-relation 626. Up to 149 conditions per place. [2023-08-27 02:07:18,645 INFO L140 encePairwiseOnDemand]: 255/261 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-27 02:07:18,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 42 transitions, 246 flow [2023-08-27 02:07:18,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:07:18,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:07:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 340 transitions. [2023-08-27 02:07:18,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4342273307790549 [2023-08-27 02:07:18,647 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 340 transitions. [2023-08-27 02:07:18,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 340 transitions. [2023-08-27 02:07:18,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:18,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 340 transitions. [2023-08-27 02:07:18,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,650 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,650 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 130 flow. Second operand 3 states and 340 transitions. [2023-08-27 02:07:18,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 42 transitions, 246 flow [2023-08-27 02:07:18,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 02:07:18,656 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 148 flow [2023-08-27 02:07:18,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2023-08-27 02:07:18,658 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-08-27 02:07:18,658 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 148 flow [2023-08-27 02:07:18,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.25) internal successors, (409), 4 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:18,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-27 02:07:18,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-27 02:07:18,662 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:18,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:18,663 INFO L85 PathProgramCache]: Analyzing trace with hash 625565175, now seen corresponding path program 1 times [2023-08-27 02:07:18,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:18,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836296105] [2023-08-27 02:07:18,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:18,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:18,716 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 02:07:18,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:18,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836296105] [2023-08-27 02:07:18,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836296105] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:18,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74569197] [2023-08-27 02:07:18,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:18,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:18,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:18,719 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 02:07:18,721 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 02:07:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:18,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-27 02:07:18,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:18,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:07:18,847 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 02:07:18,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74569197] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:07:18,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 02:07:18,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2] total 5 [2023-08-27 02:07:18,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010813165] [2023-08-27 02:07:18,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:07:18,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 02:07:18,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:18,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 02:07:18,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-27 02:07:18,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 261 [2023-08-27 02:07:18,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 148 flow. Second operand has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:18,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 261 [2023-08-27 02:07:18,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:18,959 INFO L124 PetriNetUnfolderBase]: 144/276 cut-off events. [2023-08-27 02:07:18,959 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-08-27 02:07:18,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 790 conditions, 276 events. 144/276 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1016 event pairs, 112 based on Foata normal form. 6/218 useless extension candidates. Maximal degree in co-relation 756. Up to 248 conditions per place. [2023-08-27 02:07:18,961 INFO L140 encePairwiseOnDemand]: 257/261 looper letters, 39 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2023-08-27 02:07:18,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 42 transitions, 256 flow [2023-08-27 02:07:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 02:07:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 02:07:18,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 379 transitions. [2023-08-27 02:07:18,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36302681992337166 [2023-08-27 02:07:18,963 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 379 transitions. [2023-08-27 02:07:18,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 379 transitions. [2023-08-27 02:07:18,963 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:18,963 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 379 transitions. [2023-08-27 02:07:18,964 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,966 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,966 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 148 flow. Second operand 4 states and 379 transitions. [2023-08-27 02:07:18,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 42 transitions, 256 flow [2023-08-27 02:07:18,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 42 transitions, 254 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 02:07:18,968 INFO L231 Difference]: Finished difference. Result has 40 places, 32 transitions, 155 flow [2023-08-27 02:07:18,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=155, PETRI_PLACES=40, PETRI_TRANSITIONS=32} [2023-08-27 02:07:18,971 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2023-08-27 02:07:18,971 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 32 transitions, 155 flow [2023-08-27 02:07:18,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 4 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:18,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:18,971 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-27 02:07:18,982 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 02:07:19,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:19,182 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:19,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:19,182 INFO L85 PathProgramCache]: Analyzing trace with hash -2069997959, now seen corresponding path program 2 times [2023-08-27 02:07:19,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:19,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624743436] [2023-08-27 02:07:19,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:19,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:19,280 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 02:07:19,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:19,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624743436] [2023-08-27 02:07:19,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624743436] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:19,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410622258] [2023-08-27 02:07:19,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 02:07:19,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:19,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:19,283 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 02:07:19,285 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 02:07:19,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 02:07:19,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:07:19,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-27 02:07:19,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:19,370 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 02:07:19,370 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 02:07:19,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410622258] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:07:19,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 02:07:19,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [5] total 6 [2023-08-27 02:07:19,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492071363] [2023-08-27 02:07:19,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:07:19,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 02:07:19,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:19,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 02:07:19,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-27 02:07:19,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 261 [2023-08-27 02:07:19,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 32 transitions, 155 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:19,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:19,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 261 [2023-08-27 02:07:19,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:19,422 INFO L124 PetriNetUnfolderBase]: 144/275 cut-off events. [2023-08-27 02:07:19,422 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2023-08-27 02:07:19,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 784 conditions, 275 events. 144/275 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 995 event pairs, 112 based on Foata normal form. 1/212 useless extension candidates. Maximal degree in co-relation 755. Up to 275 conditions per place. [2023-08-27 02:07:19,424 INFO L140 encePairwiseOnDemand]: 259/261 looper letters, 30 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2023-08-27 02:07:19,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 31 transitions, 207 flow [2023-08-27 02:07:19,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:07:19,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:07:19,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-08-27 02:07:19,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3997445721583653 [2023-08-27 02:07:19,426 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-08-27 02:07:19,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-08-27 02:07:19,426 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:19,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-08-27 02:07:19,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:19,428 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:19,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:19,428 INFO L175 Difference]: Start difference. First operand has 40 places, 32 transitions, 155 flow. Second operand 3 states and 313 transitions. [2023-08-27 02:07:19,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 31 transitions, 207 flow [2023-08-27 02:07:19,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 31 transitions, 186 flow, removed 2 selfloop flow, removed 6 redundant places. [2023-08-27 02:07:19,431 INFO L231 Difference]: Finished difference. Result has 35 places, 31 transitions, 126 flow [2023-08-27 02:07:19,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=35, PETRI_TRANSITIONS=31} [2023-08-27 02:07:19,431 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 2 predicate places. [2023-08-27 02:07:19,431 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 31 transitions, 126 flow [2023-08-27 02:07:19,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:19,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:19,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 02:07:19,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-27 02:07:19,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:19,643 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:19,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:19,644 INFO L85 PathProgramCache]: Analyzing trace with hash -2070395290, now seen corresponding path program 1 times [2023-08-27 02:07:19,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:19,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077700748] [2023-08-27 02:07:19,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:19,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:19,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:19,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:19,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077700748] [2023-08-27 02:07:19,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077700748] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:07:19,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:07:19,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-27 02:07:19,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982304044] [2023-08-27 02:07:19,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:07:19,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 02:07:19,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:19,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 02:07:19,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-27 02:07:19,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 261 [2023-08-27 02:07:19,689 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 31 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:19,689 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:19,689 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 261 [2023-08-27 02:07:19,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:19,757 INFO L124 PetriNetUnfolderBase]: 136/261 cut-off events. [2023-08-27 02:07:19,757 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2023-08-27 02:07:19,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 730 conditions, 261 events. 136/261 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 948 event pairs, 56 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 717. Up to 147 conditions per place. [2023-08-27 02:07:19,759 INFO L140 encePairwiseOnDemand]: 258/261 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-27 02:07:19,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 40 transitions, 230 flow [2023-08-27 02:07:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:07:19,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:07:19,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2023-08-27 02:07:19,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4278416347381865 [2023-08-27 02:07:19,761 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2023-08-27 02:07:19,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2023-08-27 02:07:19,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:19,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2023-08-27 02:07:19,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:19,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:19,763 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:19,763 INFO L175 Difference]: Start difference. First operand has 35 places, 31 transitions, 126 flow. Second operand 3 states and 335 transitions. [2023-08-27 02:07:19,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 40 transitions, 230 flow [2023-08-27 02:07:19,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 40 transitions, 229 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 02:07:19,764 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 133 flow [2023-08-27 02:07:19,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2023-08-27 02:07:19,765 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2023-08-27 02:07:19,765 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 133 flow [2023-08-27 02:07:19,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 102.5) internal successors, (410), 4 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:19,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:19,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-27 02:07:19,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-27 02:07:19,766 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:19,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:19,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2070395291, now seen corresponding path program 1 times [2023-08-27 02:07:19,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:19,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179493173] [2023-08-27 02:07:19,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:19,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:19,814 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 02:07:19,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:19,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179493173] [2023-08-27 02:07:19,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179493173] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:19,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401183055] [2023-08-27 02:07:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:19,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:19,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:19,816 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 02:07:19,818 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 02:07:19,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:19,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 02:07:19,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:19,914 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 02:07:19,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:19,930 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 02:07:19,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401183055] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:19,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:19,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-27 02:07:19,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599244595] [2023-08-27 02:07:19,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:19,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-27 02:07:19,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:19,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-27 02:07:19,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-27 02:07:19,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 261 [2023-08-27 02:07:19,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 133 flow. Second operand has 7 states, 7 states have (on average 104.42857142857143) internal successors, (731), 7 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 02:07:19,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:19,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 261 [2023-08-27 02:07:19,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:20,089 INFO L124 PetriNetUnfolderBase]: 352/649 cut-off events. [2023-08-27 02:07:20,090 INFO L125 PetriNetUnfolderBase]: For 268/268 co-relation queries the response was YES. [2023-08-27 02:07:20,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1882 conditions, 649 events. 352/649 cut-off events. For 268/268 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2996 event pairs, 72 based on Foata normal form. 12/567 useless extension candidates. Maximal degree in co-relation 1867. Up to 283 conditions per place. [2023-08-27 02:07:20,094 INFO L140 encePairwiseOnDemand]: 254/261 looper letters, 79 selfloop transitions, 14 changer transitions 0/93 dead transitions. [2023-08-27 02:07:20,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 93 transitions, 552 flow [2023-08-27 02:07:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 02:07:20,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 02:07:20,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 808 transitions. [2023-08-27 02:07:20,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4422550629447181 [2023-08-27 02:07:20,096 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 808 transitions. [2023-08-27 02:07:20,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 808 transitions. [2023-08-27 02:07:20,097 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:20,097 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 808 transitions. [2023-08-27 02:07:20,098 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.42857142857143) internal successors, (808), 7 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:20,100 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:20,101 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:20,101 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 133 flow. Second operand 7 states and 808 transitions. [2023-08-27 02:07:20,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 93 transitions, 552 flow [2023-08-27 02:07:20,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 93 transitions, 542 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 02:07:20,103 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 278 flow [2023-08-27 02:07:20,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=278, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2023-08-27 02:07:20,104 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 13 predicate places. [2023-08-27 02:07:20,104 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 278 flow [2023-08-27 02:07:20,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 104.42857142857143) internal successors, (731), 7 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 02:07:20,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:20,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:20,115 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 02:07:20,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:20,311 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:20,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:20,311 INFO L85 PathProgramCache]: Analyzing trace with hash 893652309, now seen corresponding path program 1 times [2023-08-27 02:07:20,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:20,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117049330] [2023-08-27 02:07:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:20,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:20,362 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 02:07:20,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:20,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117049330] [2023-08-27 02:07:20,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117049330] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:20,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414790283] [2023-08-27 02:07:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:20,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:20,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:20,364 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 02:07:20,366 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 02:07:20,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:20,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 02:07:20,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:20,478 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 02:07:20,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414790283] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:07:20,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 02:07:20,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 4 [2023-08-27 02:07:20,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587878025] [2023-08-27 02:07:20,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:07:20,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-27 02:07:20,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:20,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-27 02:07:20,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-08-27 02:07:20,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 261 [2023-08-27 02:07:20,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:20,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:20,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 261 [2023-08-27 02:07:20,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:20,571 INFO L124 PetriNetUnfolderBase]: 277/536 cut-off events. [2023-08-27 02:07:20,572 INFO L125 PetriNetUnfolderBase]: For 927/927 co-relation queries the response was YES. [2023-08-27 02:07:20,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1883 conditions, 536 events. 277/536 cut-off events. For 927/927 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2429 event pairs, 122 based on Foata normal form. 64/600 useless extension candidates. Maximal degree in co-relation 1863. Up to 325 conditions per place. [2023-08-27 02:07:20,575 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 44 selfloop transitions, 4 changer transitions 0/48 dead transitions. [2023-08-27 02:07:20,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 48 transitions, 374 flow [2023-08-27 02:07:20,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-27 02:07:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-27 02:07:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 435 transitions. [2023-08-27 02:07:20,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2023-08-27 02:07:20,577 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 435 transitions. [2023-08-27 02:07:20,577 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 435 transitions. [2023-08-27 02:07:20,577 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:20,577 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 435 transitions. [2023-08-27 02:07:20,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 108.75) internal successors, (435), 4 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:20,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:20,580 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:20,580 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 278 flow. Second operand 4 states and 435 transitions. [2023-08-27 02:07:20,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 48 transitions, 374 flow [2023-08-27 02:07:20,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 48 transitions, 364 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-08-27 02:07:20,583 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 236 flow [2023-08-27 02:07:20,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=236, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2023-08-27 02:07:20,583 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 12 predicate places. [2023-08-27 02:07:20,583 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 236 flow [2023-08-27 02:07:20,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.25) internal successors, (413), 4 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:20,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:20,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:20,592 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 02:07:20,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:20,792 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:20,792 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:20,792 INFO L85 PathProgramCache]: Analyzing trace with hash 896275841, now seen corresponding path program 1 times [2023-08-27 02:07:20,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:20,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033893187] [2023-08-27 02:07:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:20,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:20,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:20,870 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 02:07:20,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:20,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033893187] [2023-08-27 02:07:20,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033893187] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:20,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871032543] [2023-08-27 02:07:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:20,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:20,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:20,871 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 02:07:20,874 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 02:07:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:20,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 02:07:20,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:21,026 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 02:07:21,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:21,065 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 02:07:21,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871032543] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:21,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:21,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 2] total 7 [2023-08-27 02:07:21,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448330064] [2023-08-27 02:07:21,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:21,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-27 02:07:21,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:21,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-27 02:07:21,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-08-27 02:07:21,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 261 [2023-08-27 02:07:21,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 236 flow. Second operand has 9 states, 9 states have (on average 103.44444444444444) internal successors, (931), 9 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:21,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:21,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 261 [2023-08-27 02:07:21,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:21,261 INFO L124 PetriNetUnfolderBase]: 377/734 cut-off events. [2023-08-27 02:07:21,261 INFO L125 PetriNetUnfolderBase]: For 1244/1244 co-relation queries the response was YES. [2023-08-27 02:07:21,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2436 conditions, 734 events. 377/734 cut-off events. For 1244/1244 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3577 event pairs, 70 based on Foata normal form. 78/812 useless extension candidates. Maximal degree in co-relation 2415. Up to 312 conditions per place. [2023-08-27 02:07:21,266 INFO L140 encePairwiseOnDemand]: 255/261 looper letters, 91 selfloop transitions, 16 changer transitions 0/107 dead transitions. [2023-08-27 02:07:21,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 107 transitions, 705 flow [2023-08-27 02:07:21,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 02:07:21,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 02:07:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1002 transitions. [2023-08-27 02:07:21,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42656449553001274 [2023-08-27 02:07:21,270 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1002 transitions. [2023-08-27 02:07:21,270 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1002 transitions. [2023-08-27 02:07:21,271 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:21,271 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1002 transitions. [2023-08-27 02:07:21,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 111.33333333333333) internal successors, (1002), 9 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:21,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 261.0) internal successors, (2610), 10 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:21,277 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 261.0) internal successors, (2610), 10 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:21,277 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 236 flow. Second operand 9 states and 1002 transitions. [2023-08-27 02:07:21,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 107 transitions, 705 flow [2023-08-27 02:07:21,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 107 transitions, 699 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-27 02:07:21,282 INFO L231 Difference]: Finished difference. Result has 54 places, 48 transitions, 395 flow [2023-08-27 02:07:21,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=231, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=395, PETRI_PLACES=54, PETRI_TRANSITIONS=48} [2023-08-27 02:07:21,283 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 21 predicate places. [2023-08-27 02:07:21,283 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 48 transitions, 395 flow [2023-08-27 02:07:21,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 103.44444444444444) internal successors, (931), 9 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:21,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:21,283 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2023-08-27 02:07:21,291 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-27 02:07:21,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:21,489 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:21,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:21,490 INFO L85 PathProgramCache]: Analyzing trace with hash 879740035, now seen corresponding path program 2 times [2023-08-27 02:07:21,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:21,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485808592] [2023-08-27 02:07:21,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:21,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:21,613 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 02:07:21,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:21,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485808592] [2023-08-27 02:07:21,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485808592] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:21,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485928551] [2023-08-27 02:07:21,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 02:07:21,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:21,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:21,617 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 02:07:21,628 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 02:07:21,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-27 02:07:21,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:07:21,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 5 conjunts are in the unsatisfiable core [2023-08-27 02:07:21,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-27 02:07:21,735 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-27 02:07:21,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485928551] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:07:21,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-27 02:07:21,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [4] total 5 [2023-08-27 02:07:21,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554155766] [2023-08-27 02:07:21,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:07:21,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 02:07:21,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:21,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 02:07:21,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-27 02:07:21,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 261 [2023-08-27 02:07:21,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 48 transitions, 395 flow. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:21,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:21,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 261 [2023-08-27 02:07:21,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:21,811 INFO L124 PetriNetUnfolderBase]: 321/632 cut-off events. [2023-08-27 02:07:21,812 INFO L125 PetriNetUnfolderBase]: For 1959/1959 co-relation queries the response was YES. [2023-08-27 02:07:21,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 632 events. 321/632 cut-off events. For 1959/1959 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3020 event pairs, 239 based on Foata normal form. 38/670 useless extension candidates. Maximal degree in co-relation 2278. Up to 632 conditions per place. [2023-08-27 02:07:21,816 INFO L140 encePairwiseOnDemand]: 258/261 looper letters, 45 selfloop transitions, 1 changer transitions 0/46 dead transitions. [2023-08-27 02:07:21,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 46 transitions, 461 flow [2023-08-27 02:07:21,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:07:21,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:07:21,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 316 transitions. [2023-08-27 02:07:21,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40357598978288634 [2023-08-27 02:07:21,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 316 transitions. [2023-08-27 02:07:21,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 316 transitions. [2023-08-27 02:07:21,818 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:21,818 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 316 transitions. [2023-08-27 02:07:21,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:21,819 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:21,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:21,820 INFO L175 Difference]: Start difference. First operand has 54 places, 48 transitions, 395 flow. Second operand 3 states and 316 transitions. [2023-08-27 02:07:21,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 46 transitions, 461 flow [2023-08-27 02:07:21,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 46 transitions, 420 flow, removed 15 selfloop flow, removed 3 redundant places. [2023-08-27 02:07:21,824 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 330 flow [2023-08-27 02:07:21,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=330, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2023-08-27 02:07:21,825 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 18 predicate places. [2023-08-27 02:07:21,825 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 330 flow [2023-08-27 02:07:21,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:21,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:21,825 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:21,833 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 02:07:22,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-27 02:07:22,031 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:22,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:22,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1967214215, now seen corresponding path program 2 times [2023-08-27 02:07:22,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:22,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150141889] [2023-08-27 02:07:22,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:22,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:22,144 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:22,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:22,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150141889] [2023-08-27 02:07:22,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150141889] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:22,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000278430] [2023-08-27 02:07:22,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 02:07:22,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:22,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:22,149 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 02:07:22,169 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 02:07:22,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 02:07:22,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:07:22,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-27 02:07:22,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:22,352 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:22,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:22,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000278430] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:22,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:22,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-08-27 02:07:22,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568181099] [2023-08-27 02:07:22,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:22,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 02:07:22,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:22,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 02:07:22,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2023-08-27 02:07:22,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 261 [2023-08-27 02:07:22,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 330 flow. Second operand has 14 states, 14 states have (on average 87.92857142857143) internal successors, (1231), 14 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:22,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:22,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 261 [2023-08-27 02:07:22,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:22,668 INFO L124 PetriNetUnfolderBase]: 355/717 cut-off events. [2023-08-27 02:07:22,668 INFO L125 PetriNetUnfolderBase]: For 1435/1435 co-relation queries the response was YES. [2023-08-27 02:07:22,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2422 conditions, 717 events. 355/717 cut-off events. For 1435/1435 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3579 event pairs, 248 based on Foata normal form. 10/727 useless extension candidates. Maximal degree in co-relation 2399. Up to 602 conditions per place. [2023-08-27 02:07:22,673 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 77 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2023-08-27 02:07:22,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 84 transitions, 605 flow [2023-08-27 02:07:22,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-27 02:07:22,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-27 02:07:22,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 749 transitions. [2023-08-27 02:07:22,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3587164750957854 [2023-08-27 02:07:22,676 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 749 transitions. [2023-08-27 02:07:22,676 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 749 transitions. [2023-08-27 02:07:22,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:22,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 749 transitions. [2023-08-27 02:07:22,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 93.625) internal successors, (749), 8 states have internal predecessors, (749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:22,680 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 261.0) internal successors, (2349), 9 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:22,680 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 261.0) internal successors, (2349), 9 states have internal predecessors, (2349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:22,681 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 330 flow. Second operand 8 states and 749 transitions. [2023-08-27 02:07:22,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 84 transitions, 605 flow [2023-08-27 02:07:22,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 84 transitions, 604 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-27 02:07:22,686 INFO L231 Difference]: Finished difference. Result has 60 places, 48 transitions, 378 flow [2023-08-27 02:07:22,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=378, PETRI_PLACES=60, PETRI_TRANSITIONS=48} [2023-08-27 02:07:22,686 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 27 predicate places. [2023-08-27 02:07:22,687 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 48 transitions, 378 flow [2023-08-27 02:07:22,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 87.92857142857143) internal successors, (1231), 14 states have internal predecessors, (1231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:22,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:22,687 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:22,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-27 02:07:22,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-27 02:07:22,893 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:22,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:22,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2087903975, now seen corresponding path program 3 times [2023-08-27 02:07:22,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:22,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420179993] [2023-08-27 02:07:22,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:22,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:07:23,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:23,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420179993] [2023-08-27 02:07:23,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420179993] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:23,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992052104] [2023-08-27 02:07:23,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 02:07:23,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:23,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:23,070 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 02:07:23,086 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 02:07:23,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 02:07:23,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:07:23,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-27 02:07:23,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 02:07:23,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 02:07:23,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992052104] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:23,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:23,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 2, 2] total 10 [2023-08-27 02:07:23,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89576252] [2023-08-27 02:07:23,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:23,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-27 02:07:23,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:23,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-27 02:07:23,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-08-27 02:07:23,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 261 [2023-08-27 02:07:23,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 48 transitions, 378 flow. Second operand has 11 states, 11 states have (on average 88.0) internal successors, (968), 11 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:23,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:23,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 261 [2023-08-27 02:07:23,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:23,516 INFO L124 PetriNetUnfolderBase]: 388/805 cut-off events. [2023-08-27 02:07:23,516 INFO L125 PetriNetUnfolderBase]: For 1884/1884 co-relation queries the response was YES. [2023-08-27 02:07:23,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2599 conditions, 805 events. 388/805 cut-off events. For 1884/1884 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 4130 event pairs, 195 based on Foata normal form. 40/845 useless extension candidates. Maximal degree in co-relation 2572. Up to 538 conditions per place. [2023-08-27 02:07:23,521 INFO L140 encePairwiseOnDemand]: 254/261 looper letters, 94 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2023-08-27 02:07:23,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 107 transitions, 755 flow [2023-08-27 02:07:23,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-27 02:07:23,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-27 02:07:23,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1118 transitions. [2023-08-27 02:07:23,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3569604086845466 [2023-08-27 02:07:23,525 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1118 transitions. [2023-08-27 02:07:23,525 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1118 transitions. [2023-08-27 02:07:23,525 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:23,525 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1118 transitions. [2023-08-27 02:07:23,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.16666666666667) internal successors, (1118), 12 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:23,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 261.0) internal successors, (3393), 13 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:23,531 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 261.0) internal successors, (3393), 13 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:23,531 INFO L175 Difference]: Start difference. First operand has 60 places, 48 transitions, 378 flow. Second operand 12 states and 1118 transitions. [2023-08-27 02:07:23,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 107 transitions, 755 flow [2023-08-27 02:07:23,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 107 transitions, 719 flow, removed 7 selfloop flow, removed 5 redundant places. [2023-08-27 02:07:23,537 INFO L231 Difference]: Finished difference. Result has 68 places, 50 transitions, 406 flow [2023-08-27 02:07:23,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=406, PETRI_PLACES=68, PETRI_TRANSITIONS=50} [2023-08-27 02:07:23,538 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 35 predicate places. [2023-08-27 02:07:23,538 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 50 transitions, 406 flow [2023-08-27 02:07:23,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 88.0) internal successors, (968), 11 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:23,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:23,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:23,547 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 02:07:23,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-27 02:07:23,744 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:23,744 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:23,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1476759344, now seen corresponding path program 1 times [2023-08-27 02:07:23,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:23,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309259462] [2023-08-27 02:07:23,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:23,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:23,792 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 02:07:23,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:23,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309259462] [2023-08-27 02:07:23,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309259462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-27 02:07:23,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-27 02:07:23,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-27 02:07:23,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100747374] [2023-08-27 02:07:23,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-27 02:07:23,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-27 02:07:23,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:23,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-27 02:07:23,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-27 02:07:23,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 261 [2023-08-27 02:07:23,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 50 transitions, 406 flow. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:23,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:23,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 261 [2023-08-27 02:07:23,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:23,887 INFO L124 PetriNetUnfolderBase]: 388/794 cut-off events. [2023-08-27 02:07:23,887 INFO L125 PetriNetUnfolderBase]: For 1618/1618 co-relation queries the response was YES. [2023-08-27 02:07:23,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2617 conditions, 794 events. 388/794 cut-off events. For 1618/1618 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4014 event pairs, 180 based on Foata normal form. 11/805 useless extension candidates. Maximal degree in co-relation 2588. Up to 457 conditions per place. [2023-08-27 02:07:23,892 INFO L140 encePairwiseOnDemand]: 258/261 looper letters, 47 selfloop transitions, 8 changer transitions 3/58 dead transitions. [2023-08-27 02:07:23,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 58 transitions, 551 flow [2023-08-27 02:07:23,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-27 02:07:23,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-27 02:07:23,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 327 transitions. [2023-08-27 02:07:23,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41762452107279696 [2023-08-27 02:07:23,894 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 327 transitions. [2023-08-27 02:07:23,894 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 327 transitions. [2023-08-27 02:07:23,894 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:23,894 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 327 transitions. [2023-08-27 02:07:23,895 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 109.0) internal successors, (327), 3 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:23,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:23,896 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:23,896 INFO L175 Difference]: Start difference. First operand has 68 places, 50 transitions, 406 flow. Second operand 3 states and 327 transitions. [2023-08-27 02:07:23,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 58 transitions, 551 flow [2023-08-27 02:07:23,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 58 transitions, 531 flow, removed 4 selfloop flow, removed 5 redundant places. [2023-08-27 02:07:23,903 INFO L231 Difference]: Finished difference. Result has 66 places, 49 transitions, 404 flow [2023-08-27 02:07:23,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=404, PETRI_PLACES=66, PETRI_TRANSITIONS=49} [2023-08-27 02:07:23,903 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 33 predicate places. [2023-08-27 02:07:23,904 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 49 transitions, 404 flow [2023-08-27 02:07:23,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:23,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:23,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:23,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-27 02:07:23,904 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:23,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:23,904 INFO L85 PathProgramCache]: Analyzing trace with hash 757560504, now seen corresponding path program 1 times [2023-08-27 02:07:23,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:23,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258917478] [2023-08-27 02:07:23,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:23,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:24,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:24,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:24,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258917478] [2023-08-27 02:07:24,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258917478] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:24,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640110985] [2023-08-27 02:07:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:24,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:24,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:24,205 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 02:07:24,231 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 02:07:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:24,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 02:07:24,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:24,373 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-27 02:07:24,411 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 02:07:24,444 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 02:07:24,490 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 02:07:24,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:24,597 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_384 (Array Int Int)) (v_ArrVal_385 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_384) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_385) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|)) (.cse1 (* c_~front~0 4))) (or (= 5 (select .cse0 (+ .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (not (= (select .cse0 (+ (* c_~size~0 4) .cse1 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) 5))))) is different from false [2023-08-27 02:07:24,609 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:07:24,609 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 51 [2023-08-27 02:07:24,620 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 02:07:24,621 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 136 [2023-08-27 02:07:24,637 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 02:07:24,638 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 133 treesize of output 103 [2023-08-27 02:07:24,647 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-27 02:07:24,647 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 82 treesize of output 67 [2023-08-27 02:07:24,678 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-27 02:07:24,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640110985] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:24,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:24,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 12 [2023-08-27 02:07:24,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570823253] [2023-08-27 02:07:24,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:24,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-27 02:07:24,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:24,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-27 02:07:24,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=109, Unknown=2, NotChecked=22, Total=182 [2023-08-27 02:07:24,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 261 [2023-08-27 02:07:24,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 49 transitions, 404 flow. Second operand has 14 states, 14 states have (on average 75.28571428571429) internal successors, (1054), 14 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:24,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:24,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 261 [2023-08-27 02:07:24,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:24,755 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_385 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_385) c_~queue~0.base)) (.cse1 (* c_~front~0 4))) (or (= 5 (select .cse0 (+ c_~queue~0.offset .cse1))) (not (= 5 (select .cse0 (+ (* c_~size~0 4) c_~queue~0.offset .cse1))))))) (= c_~queue~0.offset 0) (= 5 c_~x~0) (= c_~front~0 0) (= 5 (select (select |c_#memory_int| c_~queue~0.base) 0))) is different from false [2023-08-27 02:07:25,040 INFO L124 PetriNetUnfolderBase]: 687/1418 cut-off events. [2023-08-27 02:07:25,040 INFO L125 PetriNetUnfolderBase]: For 3593/3593 co-relation queries the response was YES. [2023-08-27 02:07:25,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4948 conditions, 1418 events. 687/1418 cut-off events. For 3593/3593 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8642 event pairs, 173 based on Foata normal form. 9/1427 useless extension candidates. Maximal degree in co-relation 4918. Up to 661 conditions per place. [2023-08-27 02:07:25,049 INFO L140 encePairwiseOnDemand]: 251/261 looper letters, 76 selfloop transitions, 34 changer transitions 21/131 dead transitions. [2023-08-27 02:07:25,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 131 transitions, 1249 flow [2023-08-27 02:07:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-27 02:07:25,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-27 02:07:25,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 726 transitions. [2023-08-27 02:07:25,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3090676883780332 [2023-08-27 02:07:25,052 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 726 transitions. [2023-08-27 02:07:25,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 726 transitions. [2023-08-27 02:07:25,052 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:25,052 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 726 transitions. [2023-08-27 02:07:25,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 80.66666666666667) internal successors, (726), 9 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:25,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 261.0) internal successors, (2610), 10 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:25,057 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 261.0) internal successors, (2610), 10 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:25,057 INFO L175 Difference]: Start difference. First operand has 66 places, 49 transitions, 404 flow. Second operand 9 states and 726 transitions. [2023-08-27 02:07:25,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 131 transitions, 1249 flow [2023-08-27 02:07:25,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 131 transitions, 1197 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-27 02:07:25,080 INFO L231 Difference]: Finished difference. Result has 72 places, 78 transitions, 827 flow [2023-08-27 02:07:25,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=827, PETRI_PLACES=72, PETRI_TRANSITIONS=78} [2023-08-27 02:07:25,081 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 39 predicate places. [2023-08-27 02:07:25,081 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 78 transitions, 827 flow [2023-08-27 02:07:25,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 75.28571428571429) internal successors, (1054), 14 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:25,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:25,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:25,091 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 02:07:25,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-27 02:07:25,291 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:25,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:25,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1324299618, now seen corresponding path program 2 times [2023-08-27 02:07:25,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:25,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608442411] [2023-08-27 02:07:25,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:25,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:25,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:25,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608442411] [2023-08-27 02:07:25,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608442411] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:25,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82938825] [2023-08-27 02:07:25,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 02:07:25,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:25,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:25,558 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 02:07:25,576 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 02:07:25,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 02:07:25,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:07:25,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-27 02:07:25,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:25,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:25,766 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 02:07:25,767 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 27 treesize of output 11 [2023-08-27 02:07:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:25,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82938825] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:25,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:25,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 3] total 6 [2023-08-27 02:07:25,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698132105] [2023-08-27 02:07:25,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:25,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 02:07:25,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:25,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 02:07:25,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-08-27 02:07:25,782 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 261 [2023-08-27 02:07:25,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 78 transitions, 827 flow. Second operand has 8 states, 8 states have (on average 89.375) internal successors, (715), 8 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:25,782 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:25,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 261 [2023-08-27 02:07:25,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:26,041 INFO L124 PetriNetUnfolderBase]: 925/1836 cut-off events. [2023-08-27 02:07:26,042 INFO L125 PetriNetUnfolderBase]: For 5840/5840 co-relation queries the response was YES. [2023-08-27 02:07:26,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7805 conditions, 1836 events. 925/1836 cut-off events. For 5840/5840 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11542 event pairs, 279 based on Foata normal form. 6/1842 useless extension candidates. Maximal degree in co-relation 7772. Up to 957 conditions per place. [2023-08-27 02:07:26,055 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 71 selfloop transitions, 42 changer transitions 10/123 dead transitions. [2023-08-27 02:07:26,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 123 transitions, 1440 flow [2023-08-27 02:07:26,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-27 02:07:26,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-27 02:07:26,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 472 transitions. [2023-08-27 02:07:26,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36168582375478925 [2023-08-27 02:07:26,057 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 472 transitions. [2023-08-27 02:07:26,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 472 transitions. [2023-08-27 02:07:26,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:26,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 472 transitions. [2023-08-27 02:07:26,058 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 94.4) internal successors, (472), 5 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:26,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:26,060 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 261.0) internal successors, (1566), 6 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:26,060 INFO L175 Difference]: Start difference. First operand has 72 places, 78 transitions, 827 flow. Second operand 5 states and 472 transitions. [2023-08-27 02:07:26,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 123 transitions, 1440 flow [2023-08-27 02:07:26,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 123 transitions, 1420 flow, removed 7 selfloop flow, removed 2 redundant places. [2023-08-27 02:07:26,084 INFO L231 Difference]: Finished difference. Result has 75 places, 90 transitions, 1106 flow [2023-08-27 02:07:26,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1106, PETRI_PLACES=75, PETRI_TRANSITIONS=90} [2023-08-27 02:07:26,084 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 42 predicate places. [2023-08-27 02:07:26,085 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 90 transitions, 1106 flow [2023-08-27 02:07:26,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 89.375) internal successors, (715), 8 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:26,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:26,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:26,097 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 02:07:26,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-27 02:07:26,291 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:26,291 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:26,291 INFO L85 PathProgramCache]: Analyzing trace with hash -762603538, now seen corresponding path program 3 times [2023-08-27 02:07:26,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:26,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433770165] [2023-08-27 02:07:26,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:26,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:26,560 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:26,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:26,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433770165] [2023-08-27 02:07:26,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433770165] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:26,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678934746] [2023-08-27 02:07:26,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 02:07:26,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:26,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:26,565 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 02:07:26,572 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 02:07:26,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-27 02:07:26,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:07:26,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-27 02:07:26,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:26,726 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 02:07:26,754 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-27 02:07:26,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 02:07:26,805 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 02:07:26,837 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 02:07:26,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:26,866 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_449 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_449) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4))))) is different from false [2023-08-27 02:07:26,952 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:07:26,952 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 60 treesize of output 48 [2023-08-27 02:07:26,962 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:07:26,962 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 184 treesize of output 165 [2023-08-27 02:07:26,968 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-08-27 02:07:26,978 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:07:26,979 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 55 treesize of output 48 [2023-08-27 02:07:27,033 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 02:07:27,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678934746] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:27,034 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:27,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 14 [2023-08-27 02:07:27,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386181487] [2023-08-27 02:07:27,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:27,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-27 02:07:27,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:27,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-27 02:07:27,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=161, Unknown=3, NotChecked=26, Total=240 [2023-08-27 02:07:27,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 261 [2023-08-27 02:07:27,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 90 transitions, 1106 flow. Second operand has 16 states, 16 states have (on average 75.0625) internal successors, (1201), 16 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:27,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:27,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 261 [2023-08-27 02:07:27,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:27,434 INFO L124 PetriNetUnfolderBase]: 1060/2037 cut-off events. [2023-08-27 02:07:27,435 INFO L125 PetriNetUnfolderBase]: For 8051/8051 co-relation queries the response was YES. [2023-08-27 02:07:27,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9108 conditions, 2037 events. 1060/2037 cut-off events. For 8051/8051 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12634 event pairs, 237 based on Foata normal form. 9/2046 useless extension candidates. Maximal degree in co-relation 9074. Up to 1073 conditions per place. [2023-08-27 02:07:27,450 INFO L140 encePairwiseOnDemand]: 251/261 looper letters, 51 selfloop transitions, 70 changer transitions 18/139 dead transitions. [2023-08-27 02:07:27,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 139 transitions, 1821 flow [2023-08-27 02:07:27,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 02:07:27,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 02:07:27,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 560 transitions. [2023-08-27 02:07:27,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3065134099616858 [2023-08-27 02:07:27,452 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 560 transitions. [2023-08-27 02:07:27,452 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 560 transitions. [2023-08-27 02:07:27,452 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:27,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 560 transitions. [2023-08-27 02:07:27,454 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 80.0) internal successors, (560), 7 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:27,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:27,456 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:27,456 INFO L175 Difference]: Start difference. First operand has 75 places, 90 transitions, 1106 flow. Second operand 7 states and 560 transitions. [2023-08-27 02:07:27,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 139 transitions, 1821 flow [2023-08-27 02:07:27,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 139 transitions, 1774 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-27 02:07:27,487 INFO L231 Difference]: Finished difference. Result has 81 places, 106 transitions, 1550 flow [2023-08-27 02:07:27,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1550, PETRI_PLACES=81, PETRI_TRANSITIONS=106} [2023-08-27 02:07:27,488 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 48 predicate places. [2023-08-27 02:07:27,488 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 106 transitions, 1550 flow [2023-08-27 02:07:27,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.0625) internal successors, (1201), 16 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:27,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:27,488 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:27,501 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 02:07:27,694 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,SelfDestructingSolverStorable17 [2023-08-27 02:07:27,695 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:27,695 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:27,695 INFO L85 PathProgramCache]: Analyzing trace with hash 95443360, now seen corresponding path program 4 times [2023-08-27 02:07:27,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:27,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585932848] [2023-08-27 02:07:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:27,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:27,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:28,125 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 02:07:28,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:28,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585932848] [2023-08-27 02:07:28,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585932848] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:28,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154294092] [2023-08-27 02:07:28,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 02:07:28,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:28,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:28,127 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 02:07:28,154 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 02:07:28,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 02:07:28,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:07:28,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-27 02:07:28,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:28,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:28,415 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 02:07:28,415 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 28 treesize of output 11 [2023-08-27 02:07:28,451 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 02:07:28,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154294092] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:28,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:28,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 5] total 15 [2023-08-27 02:07:28,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018753570] [2023-08-27 02:07:28,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:28,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-27 02:07:28,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:28,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-27 02:07:28,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2023-08-27 02:07:28,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 261 [2023-08-27 02:07:28,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 106 transitions, 1550 flow. Second operand has 17 states, 17 states have (on average 82.6470588235294) internal successors, (1405), 17 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:28,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:28,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 261 [2023-08-27 02:07:28,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:29,179 INFO L124 PetriNetUnfolderBase]: 1204/2266 cut-off events. [2023-08-27 02:07:29,180 INFO L125 PetriNetUnfolderBase]: For 13412/13412 co-relation queries the response was YES. [2023-08-27 02:07:29,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12206 conditions, 2266 events. 1204/2266 cut-off events. For 13412/13412 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 14247 event pairs, 170 based on Foata normal form. 15/2281 useless extension candidates. Maximal degree in co-relation 12170. Up to 1161 conditions per place. [2023-08-27 02:07:29,238 INFO L140 encePairwiseOnDemand]: 255/261 looper letters, 120 selfloop transitions, 82 changer transitions 51/253 dead transitions. [2023-08-27 02:07:29,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 253 transitions, 3072 flow [2023-08-27 02:07:29,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-27 02:07:29,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-27 02:07:29,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1585 transitions. [2023-08-27 02:07:29,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33737760749255 [2023-08-27 02:07:29,244 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1585 transitions. [2023-08-27 02:07:29,244 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1585 transitions. [2023-08-27 02:07:29,245 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:29,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1585 transitions. [2023-08-27 02:07:29,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 88.05555555555556) internal successors, (1585), 18 states have internal predecessors, (1585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:29,254 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 261.0) internal successors, (4959), 19 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:29,255 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 261.0) internal successors, (4959), 19 states have internal predecessors, (4959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:29,255 INFO L175 Difference]: Start difference. First operand has 81 places, 106 transitions, 1550 flow. Second operand 18 states and 1585 transitions. [2023-08-27 02:07:29,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 253 transitions, 3072 flow [2023-08-27 02:07:29,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 253 transitions, 2848 flow, removed 95 selfloop flow, removed 7 redundant places. [2023-08-27 02:07:29,303 INFO L231 Difference]: Finished difference. Result has 94 places, 120 transitions, 1900 flow [2023-08-27 02:07:29,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1900, PETRI_PLACES=94, PETRI_TRANSITIONS=120} [2023-08-27 02:07:29,304 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 61 predicate places. [2023-08-27 02:07:29,304 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 120 transitions, 1900 flow [2023-08-27 02:07:29,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 82.6470588235294) internal successors, (1405), 17 states have internal predecessors, (1405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:29,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:29,305 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:29,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-27 02:07:29,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:29,510 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:29,511 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:29,511 INFO L85 PathProgramCache]: Analyzing trace with hash -594651736, now seen corresponding path program 5 times [2023-08-27 02:07:29,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:29,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442730689] [2023-08-27 02:07:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:29,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:29,957 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 02:07:29,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:29,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442730689] [2023-08-27 02:07:29,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442730689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:29,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687127113] [2023-08-27 02:07:29,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 02:07:29,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:29,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:29,959 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 02:07:29,961 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 02:07:30,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 02:07:30,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:07:30,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 02:07:30,074 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:30,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 02:07:30,200 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-08-27 02:07:30,309 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 02:07:30,309 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 21 treesize of output 10 [2023-08-27 02:07:30,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:30,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:30,427 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:07:30,428 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 47 treesize of output 35 [2023-08-27 02:07:30,436 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-27 02:07:30,548 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 02:07:30,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687127113] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:30,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:30,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 7] total 20 [2023-08-27 02:07:30,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859713641] [2023-08-27 02:07:30,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:30,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-27 02:07:30,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:30,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-27 02:07:30,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2023-08-27 02:07:30,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 261 [2023-08-27 02:07:30,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 120 transitions, 1900 flow. Second operand has 22 states, 22 states have (on average 78.0909090909091) internal successors, (1718), 22 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:30,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:30,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 261 [2023-08-27 02:07:30,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:31,664 INFO L124 PetriNetUnfolderBase]: 1638/3076 cut-off events. [2023-08-27 02:07:31,664 INFO L125 PetriNetUnfolderBase]: For 19340/19340 co-relation queries the response was YES. [2023-08-27 02:07:31,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15049 conditions, 3076 events. 1638/3076 cut-off events. For 19340/19340 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 20350 event pairs, 167 based on Foata normal form. 44/3120 useless extension candidates. Maximal degree in co-relation 15011. Up to 1567 conditions per place. [2023-08-27 02:07:31,691 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 97 selfloop transitions, 104 changer transitions 70/271 dead transitions. [2023-08-27 02:07:31,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 271 transitions, 3488 flow [2023-08-27 02:07:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-27 02:07:31,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-27 02:07:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1598 transitions. [2023-08-27 02:07:31,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3222423875781408 [2023-08-27 02:07:31,695 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1598 transitions. [2023-08-27 02:07:31,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1598 transitions. [2023-08-27 02:07:31,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:31,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1598 transitions. [2023-08-27 02:07:31,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 84.10526315789474) internal successors, (1598), 19 states have internal predecessors, (1598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:31,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 261.0) internal successors, (5220), 20 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:31,704 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 261.0) internal successors, (5220), 20 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:31,704 INFO L175 Difference]: Start difference. First operand has 94 places, 120 transitions, 1900 flow. Second operand 19 states and 1598 transitions. [2023-08-27 02:07:31,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 271 transitions, 3488 flow [2023-08-27 02:07:31,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 271 transitions, 3199 flow, removed 82 selfloop flow, removed 7 redundant places. [2023-08-27 02:07:31,757 INFO L231 Difference]: Finished difference. Result has 113 places, 140 transitions, 2232 flow [2023-08-27 02:07:31,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=1694, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2232, PETRI_PLACES=113, PETRI_TRANSITIONS=140} [2023-08-27 02:07:31,757 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 80 predicate places. [2023-08-27 02:07:31,757 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 140 transitions, 2232 flow [2023-08-27 02:07:31,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 78.0909090909091) internal successors, (1718), 22 states have internal predecessors, (1718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:31,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:31,758 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:31,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-27 02:07:31,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:31,964 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:31,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:31,964 INFO L85 PathProgramCache]: Analyzing trace with hash -440576514, now seen corresponding path program 6 times [2023-08-27 02:07:31,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:31,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564657974] [2023-08-27 02:07:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:31,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:31,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:32,131 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 02:07:32,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:32,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564657974] [2023-08-27 02:07:32,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564657974] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:32,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119822174] [2023-08-27 02:07:32,131 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 02:07:32,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:32,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:32,133 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 02:07:32,159 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 02:07:32,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 02:07:32,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:07:32,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-27 02:07:32,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:32,391 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 02:07:32,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:32,480 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 02:07:32,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119822174] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:32,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:32,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-27 02:07:32,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613571421] [2023-08-27 02:07:32,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:32,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-27 02:07:32,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:32,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-27 02:07:32,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2023-08-27 02:07:32,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 261 [2023-08-27 02:07:32,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 140 transitions, 2232 flow. Second operand has 18 states, 18 states have (on average 88.27777777777777) internal successors, (1589), 18 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:32,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:32,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 261 [2023-08-27 02:07:32,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:33,122 INFO L124 PetriNetUnfolderBase]: 1589/2989 cut-off events. [2023-08-27 02:07:33,123 INFO L125 PetriNetUnfolderBase]: For 19398/19398 co-relation queries the response was YES. [2023-08-27 02:07:33,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14855 conditions, 2989 events. 1589/2989 cut-off events. For 19398/19398 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 20236 event pairs, 912 based on Foata normal form. 16/3005 useless extension candidates. Maximal degree in co-relation 14810. Up to 2717 conditions per place. [2023-08-27 02:07:33,149 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 130 selfloop transitions, 4 changer transitions 48/182 dead transitions. [2023-08-27 02:07:33,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 182 transitions, 2815 flow [2023-08-27 02:07:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-27 02:07:33,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-27 02:07:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 920 transitions. [2023-08-27 02:07:33,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3524904214559387 [2023-08-27 02:07:33,152 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 920 transitions. [2023-08-27 02:07:33,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 920 transitions. [2023-08-27 02:07:33,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:33,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 920 transitions. [2023-08-27 02:07:33,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 92.0) internal successors, (920), 10 states have internal predecessors, (920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:33,160 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 261.0) internal successors, (2871), 11 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:33,160 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 261.0) internal successors, (2871), 11 states have internal predecessors, (2871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:33,161 INFO L175 Difference]: Start difference. First operand has 113 places, 140 transitions, 2232 flow. Second operand 10 states and 920 transitions. [2023-08-27 02:07:33,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 182 transitions, 2815 flow [2023-08-27 02:07:33,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 182 transitions, 2473 flow, removed 89 selfloop flow, removed 13 redundant places. [2023-08-27 02:07:33,231 INFO L231 Difference]: Finished difference. Result has 110 places, 134 transitions, 1830 flow [2023-08-27 02:07:33,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=1902, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1830, PETRI_PLACES=110, PETRI_TRANSITIONS=134} [2023-08-27 02:07:33,231 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 77 predicate places. [2023-08-27 02:07:33,231 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 134 transitions, 1830 flow [2023-08-27 02:07:33,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 88.27777777777777) internal successors, (1589), 18 states have internal predecessors, (1589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:33,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:33,232 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:33,239 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 02:07:33,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:33,438 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:33,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:33,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1897318082, now seen corresponding path program 7 times [2023-08-27 02:07:33,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:33,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201748577] [2023-08-27 02:07:33,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:33,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:33,890 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:07:33,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:33,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201748577] [2023-08-27 02:07:33,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201748577] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:33,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432758098] [2023-08-27 02:07:33,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 02:07:33,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:33,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:33,893 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 02:07:33,899 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 02:07:34,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:34,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 34 conjunts are in the unsatisfiable core [2023-08-27 02:07:34,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:34,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:34,252 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 02:07:34,252 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 28 treesize of output 11 [2023-08-27 02:07:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 02:07:34,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432758098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:34,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:34,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 7] total 23 [2023-08-27 02:07:34,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999789523] [2023-08-27 02:07:34,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:34,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-27 02:07:34,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:34,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-27 02:07:34,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2023-08-27 02:07:34,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 261 [2023-08-27 02:07:34,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 134 transitions, 1830 flow. Second operand has 25 states, 25 states have (on average 82.12) internal successors, (2053), 25 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:34,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:34,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 261 [2023-08-27 02:07:34,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:36,059 INFO L124 PetriNetUnfolderBase]: 2539/4678 cut-off events. [2023-08-27 02:07:36,059 INFO L125 PetriNetUnfolderBase]: For 21091/21091 co-relation queries the response was YES. [2023-08-27 02:07:36,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21359 conditions, 4678 events. 2539/4678 cut-off events. For 21091/21091 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 32885 event pairs, 264 based on Foata normal form. 50/4728 useless extension candidates. Maximal degree in co-relation 21317. Up to 2324 conditions per place. [2023-08-27 02:07:36,086 INFO L140 encePairwiseOnDemand]: 255/261 looper letters, 203 selfloop transitions, 178 changer transitions 133/514 dead transitions. [2023-08-27 02:07:36,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 514 transitions, 5429 flow [2023-08-27 02:07:36,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-08-27 02:07:36,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-08-27 02:07:36,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 3696 transitions. [2023-08-27 02:07:36,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3371647509578544 [2023-08-27 02:07:36,093 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 3696 transitions. [2023-08-27 02:07:36,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 3696 transitions. [2023-08-27 02:07:36,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:36,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 3696 transitions. [2023-08-27 02:07:36,100 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 88.0) internal successors, (3696), 42 states have internal predecessors, (3696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:36,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 261.0) internal successors, (11223), 43 states have internal predecessors, (11223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:36,114 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 261.0) internal successors, (11223), 43 states have internal predecessors, (11223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:36,114 INFO L175 Difference]: Start difference. First operand has 110 places, 134 transitions, 1830 flow. Second operand 42 states and 3696 transitions. [2023-08-27 02:07:36,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 514 transitions, 5429 flow [2023-08-27 02:07:36,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 514 transitions, 5387 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-08-27 02:07:36,198 INFO L231 Difference]: Finished difference. Result has 150 places, 213 transitions, 3451 flow [2023-08-27 02:07:36,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=3451, PETRI_PLACES=150, PETRI_TRANSITIONS=213} [2023-08-27 02:07:36,198 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 117 predicate places. [2023-08-27 02:07:36,199 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 213 transitions, 3451 flow [2023-08-27 02:07:36,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 82.12) internal successors, (2053), 25 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:36,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:36,199 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:36,207 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 02:07:36,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:36,405 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:36,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:36,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1901133394, now seen corresponding path program 8 times [2023-08-27 02:07:36,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:36,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422738304] [2023-08-27 02:07:36,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:36,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:07:37,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:37,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422738304] [2023-08-27 02:07:37,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422738304] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:37,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760511916] [2023-08-27 02:07:37,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 02:07:37,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:37,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:37,029 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 02:07:37,056 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 02:07:37,178 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 02:07:37,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:07:37,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 41 conjunts are in the unsatisfiable core [2023-08-27 02:07:37,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:37,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 02:07:37,393 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 02:07:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:37,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:37,558 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_629 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_629) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 8)))) is different from false [2023-08-27 02:07:37,576 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:07:37,576 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-08-27 02:07:37,583 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-27 02:07:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 02:07:37,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760511916] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:37,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:37,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 30 [2023-08-27 02:07:37,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799407285] [2023-08-27 02:07:37,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:37,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-27 02:07:37,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:37,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-27 02:07:37,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=837, Unknown=1, NotChecked=58, Total=992 [2023-08-27 02:07:37,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 261 [2023-08-27 02:07:37,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 213 transitions, 3451 flow. Second operand has 32 states, 32 states have (on average 77.71875) internal successors, (2487), 32 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:37,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:37,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 261 [2023-08-27 02:07:37,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:39,561 INFO L124 PetriNetUnfolderBase]: 2940/5328 cut-off events. [2023-08-27 02:07:39,561 INFO L125 PetriNetUnfolderBase]: For 39655/39655 co-relation queries the response was YES. [2023-08-27 02:07:39,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27919 conditions, 5328 events. 2940/5328 cut-off events. For 39655/39655 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37387 event pairs, 227 based on Foata normal form. 5/5333 useless extension candidates. Maximal degree in co-relation 27867. Up to 2661 conditions per place. [2023-08-27 02:07:39,590 INFO L140 encePairwiseOnDemand]: 253/261 looper letters, 112 selfloop transitions, 220 changer transitions 63/395 dead transitions. [2023-08-27 02:07:39,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 395 transitions, 5797 flow [2023-08-27 02:07:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-27 02:07:39,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-27 02:07:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2077 transitions. [2023-08-27 02:07:39,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31831417624521074 [2023-08-27 02:07:39,594 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2077 transitions. [2023-08-27 02:07:39,594 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2077 transitions. [2023-08-27 02:07:39,595 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:39,595 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2077 transitions. [2023-08-27 02:07:39,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 83.08) internal successors, (2077), 25 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:39,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 261.0) internal successors, (6786), 26 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:39,604 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 261.0) internal successors, (6786), 26 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:39,604 INFO L175 Difference]: Start difference. First operand has 150 places, 213 transitions, 3451 flow. Second operand 25 states and 2077 transitions. [2023-08-27 02:07:39,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 395 transitions, 5797 flow [2023-08-27 02:07:39,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 395 transitions, 5474 flow, removed 118 selfloop flow, removed 11 redundant places. [2023-08-27 02:07:39,797 INFO L231 Difference]: Finished difference. Result has 166 places, 254 transitions, 4339 flow [2023-08-27 02:07:39,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=3169, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=4339, PETRI_PLACES=166, PETRI_TRANSITIONS=254} [2023-08-27 02:07:39,798 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 133 predicate places. [2023-08-27 02:07:39,798 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 254 transitions, 4339 flow [2023-08-27 02:07:39,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 77.71875) internal successors, (2487), 32 states have internal predecessors, (2487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:39,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:39,799 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:39,805 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 02:07:40,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:40,005 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:40,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:40,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1465975416, now seen corresponding path program 9 times [2023-08-27 02:07:40,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:40,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146034203] [2023-08-27 02:07:40,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:40,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:40,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 02:07:40,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:40,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146034203] [2023-08-27 02:07:40,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146034203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:40,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246943501] [2023-08-27 02:07:40,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 02:07:40,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:40,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:40,125 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 02:07:40,149 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 02:07:40,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-27 02:07:40,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:07:40,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-27 02:07:40,450 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 02:07:40,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:40,749 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-27 02:07:40,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246943501] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:40,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:40,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2023-08-27 02:07:40,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979908823] [2023-08-27 02:07:40,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:40,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-27 02:07:40,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:40,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-27 02:07:40,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2023-08-27 02:07:40,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 261 [2023-08-27 02:07:40,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 254 transitions, 4339 flow. Second operand has 23 states, 23 states have (on average 88.34782608695652) internal successors, (2032), 23 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:40,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:40,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 261 [2023-08-27 02:07:40,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:42,618 INFO L124 PetriNetUnfolderBase]: 5963/11165 cut-off events. [2023-08-27 02:07:42,618 INFO L125 PetriNetUnfolderBase]: For 105482/105482 co-relation queries the response was YES. [2023-08-27 02:07:42,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70775 conditions, 11165 events. 5963/11165 cut-off events. For 105482/105482 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 91513 event pairs, 861 based on Foata normal form. 282/11447 useless extension candidates. Maximal degree in co-relation 70721. Up to 6140 conditions per place. [2023-08-27 02:07:42,689 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 127 selfloop transitions, 260 changer transitions 251/638 dead transitions. [2023-08-27 02:07:42,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 638 transitions, 11375 flow [2023-08-27 02:07:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-27 02:07:42,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-27 02:07:42,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1870 transitions. [2023-08-27 02:07:42,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35823754789272033 [2023-08-27 02:07:42,693 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1870 transitions. [2023-08-27 02:07:42,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1870 transitions. [2023-08-27 02:07:42,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:42,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1870 transitions. [2023-08-27 02:07:42,696 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 93.5) internal successors, (1870), 20 states have internal predecessors, (1870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:42,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 261.0) internal successors, (5481), 21 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:42,701 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 261.0) internal successors, (5481), 21 states have internal predecessors, (5481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:42,701 INFO L175 Difference]: Start difference. First operand has 166 places, 254 transitions, 4339 flow. Second operand 20 states and 1870 transitions. [2023-08-27 02:07:42,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 638 transitions, 11375 flow [2023-08-27 02:07:43,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 638 transitions, 10727 flow, removed 202 selfloop flow, removed 10 redundant places. [2023-08-27 02:07:43,186 INFO L231 Difference]: Finished difference. Result has 181 places, 350 transitions, 6712 flow [2023-08-27 02:07:43,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=4032, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=6712, PETRI_PLACES=181, PETRI_TRANSITIONS=350} [2023-08-27 02:07:43,187 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 148 predicate places. [2023-08-27 02:07:43,187 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 350 transitions, 6712 flow [2023-08-27 02:07:43,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 88.34782608695652) internal successors, (2032), 23 states have internal predecessors, (2032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:43,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:43,187 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:43,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-27 02:07:43,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:43,394 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:43,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:43,394 INFO L85 PathProgramCache]: Analyzing trace with hash -865259478, now seen corresponding path program 10 times [2023-08-27 02:07:43,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:43,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120147557] [2023-08-27 02:07:43,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:43,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:07:43,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:43,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120147557] [2023-08-27 02:07:43,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120147557] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:43,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156840195] [2023-08-27 02:07:43,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 02:07:43,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:43,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:43,973 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 02:07:44,042 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 02:07:44,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 02:07:44,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:07:44,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 44 conjunts are in the unsatisfiable core [2023-08-27 02:07:44,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:44,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:44,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:44,398 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 02:07:44,398 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 28 treesize of output 11 [2023-08-27 02:07:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-27 02:07:44,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156840195] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:44,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:44,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 7] total 28 [2023-08-27 02:07:44,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050535105] [2023-08-27 02:07:44,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:44,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-27 02:07:44,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:44,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-27 02:07:44,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2023-08-27 02:07:44,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 261 [2023-08-27 02:07:44,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 350 transitions, 6712 flow. Second operand has 30 states, 30 states have (on average 81.73333333333333) internal successors, (2452), 30 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:44,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:44,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 261 [2023-08-27 02:07:44,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:48,474 INFO L124 PetriNetUnfolderBase]: 5906/10924 cut-off events. [2023-08-27 02:07:48,474 INFO L125 PetriNetUnfolderBase]: For 132554/132554 co-relation queries the response was YES. [2023-08-27 02:07:48,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74798 conditions, 10924 events. 5906/10924 cut-off events. For 132554/132554 co-relation queries the response was YES. Maximal size of possible extension queue 680. Compared 87709 event pairs, 468 based on Foata normal form. 33/10957 useless extension candidates. Maximal degree in co-relation 74738. Up to 6213 conditions per place. [2023-08-27 02:07:48,551 INFO L140 encePairwiseOnDemand]: 255/261 looper letters, 401 selfloop transitions, 513 changer transitions 187/1101 dead transitions. [2023-08-27 02:07:48,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1101 transitions, 17491 flow [2023-08-27 02:07:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-08-27 02:07:48,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2023-08-27 02:07:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 7515 transitions. [2023-08-27 02:07:48,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33874239350912777 [2023-08-27 02:07:48,560 INFO L72 ComplementDD]: Start complementDD. Operand 85 states and 7515 transitions. [2023-08-27 02:07:48,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 85 states and 7515 transitions. [2023-08-27 02:07:48,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:48,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 85 states and 7515 transitions. [2023-08-27 02:07:48,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 86 states, 85 states have (on average 88.41176470588235) internal successors, (7515), 85 states have internal predecessors, (7515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:48,589 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 86 states, 86 states have (on average 261.0) internal successors, (22446), 86 states have internal predecessors, (22446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:48,593 INFO L81 ComplementDD]: Finished complementDD. Result has 86 states, 86 states have (on average 261.0) internal successors, (22446), 86 states have internal predecessors, (22446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:48,593 INFO L175 Difference]: Start difference. First operand has 181 places, 350 transitions, 6712 flow. Second operand 85 states and 7515 transitions. [2023-08-27 02:07:48,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1101 transitions, 17491 flow [2023-08-27 02:07:49,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 1101 transitions, 16677 flow, removed 397 selfloop flow, removed 9 redundant places. [2023-08-27 02:07:49,092 INFO L231 Difference]: Finished difference. Result has 274 places, 545 transitions, 11621 flow [2023-08-27 02:07:49,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=6356, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=321, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=11621, PETRI_PLACES=274, PETRI_TRANSITIONS=545} [2023-08-27 02:07:49,092 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 241 predicate places. [2023-08-27 02:07:49,092 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 545 transitions, 11621 flow [2023-08-27 02:07:49,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 81.73333333333333) internal successors, (2452), 30 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:49,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:49,093 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:49,098 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 02:07:49,293 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,SelfDestructingSolverStorable24 [2023-08-27 02:07:49,293 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:49,294 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:49,294 INFO L85 PathProgramCache]: Analyzing trace with hash -845945824, now seen corresponding path program 11 times [2023-08-27 02:07:49,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:49,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936431568] [2023-08-27 02:07:49,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:49,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:49,841 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:07:49,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:49,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936431568] [2023-08-27 02:07:49,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936431568] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:49,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352301308] [2023-08-27 02:07:49,842 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-27 02:07:49,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:49,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:49,842 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 02:07:49,844 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 02:07:49,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-27 02:07:49,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:07:49,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-27 02:07:49,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-27 02:07:50,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:50,337 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 02:07:50,337 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 28 treesize of output 11 [2023-08-27 02:07:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:07:50,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352301308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:50,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:50,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 9] total 33 [2023-08-27 02:07:50,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257833269] [2023-08-27 02:07:50,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:50,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-27 02:07:50,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:50,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-27 02:07:50,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2023-08-27 02:07:50,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 261 [2023-08-27 02:07:50,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 545 transitions, 11621 flow. Second operand has 35 states, 35 states have (on average 81.8) internal successors, (2863), 35 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:50,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:50,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 261 [2023-08-27 02:07:50,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:07:56,118 INFO L124 PetriNetUnfolderBase]: 8459/15515 cut-off events. [2023-08-27 02:07:56,118 INFO L125 PetriNetUnfolderBase]: For 277779/277779 co-relation queries the response was YES. [2023-08-27 02:07:56,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108657 conditions, 15515 events. 8459/15515 cut-off events. For 277779/277779 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 130058 event pairs, 595 based on Foata normal form. 79/15594 useless extension candidates. Maximal degree in co-relation 108573. Up to 9032 conditions per place. [2023-08-27 02:07:56,243 INFO L140 encePairwiseOnDemand]: 255/261 looper letters, 263 selfloop transitions, 748 changer transitions 227/1238 dead transitions. [2023-08-27 02:07:56,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1238 transitions, 22411 flow [2023-08-27 02:07:56,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-08-27 02:07:56,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2023-08-27 02:07:56,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 5986 transitions. [2023-08-27 02:07:56,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3372774397115168 [2023-08-27 02:07:56,257 INFO L72 ComplementDD]: Start complementDD. Operand 68 states and 5986 transitions. [2023-08-27 02:07:56,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 68 states and 5986 transitions. [2023-08-27 02:07:56,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:07:56,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 68 states and 5986 transitions. [2023-08-27 02:07:56,268 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 69 states, 68 states have (on average 88.02941176470588) internal successors, (5986), 68 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:56,281 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 69 states, 69 states have (on average 261.0) internal successors, (18009), 69 states have internal predecessors, (18009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:56,283 INFO L81 ComplementDD]: Finished complementDD. Result has 69 states, 69 states have (on average 261.0) internal successors, (18009), 69 states have internal predecessors, (18009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:56,283 INFO L175 Difference]: Start difference. First operand has 274 places, 545 transitions, 11621 flow. Second operand 68 states and 5986 transitions. [2023-08-27 02:07:56,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1238 transitions, 22411 flow [2023-08-27 02:07:57,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 1238 transitions, 18154 flow, removed 1451 selfloop flow, removed 15 redundant places. [2023-08-27 02:07:57,499 INFO L231 Difference]: Finished difference. Result has 343 places, 776 transitions, 15171 flow [2023-08-27 02:07:57,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=9017, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=68, PETRI_FLOW=15171, PETRI_PLACES=343, PETRI_TRANSITIONS=776} [2023-08-27 02:07:57,500 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 310 predicate places. [2023-08-27 02:07:57,500 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 776 transitions, 15171 flow [2023-08-27 02:07:57,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 81.8) internal successors, (2863), 35 states have internal predecessors, (2863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:57,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:07:57,501 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:07:57,506 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 02:07:57,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-27 02:07:57,702 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:07:57,703 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:07:57,703 INFO L85 PathProgramCache]: Analyzing trace with hash 573754360, now seen corresponding path program 12 times [2023-08-27 02:07:57,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:07:57,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825097863] [2023-08-27 02:07:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:07:57,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:07:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:07:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:07:58,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:07:58,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825097863] [2023-08-27 02:07:58,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825097863] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:07:58,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242633193] [2023-08-27 02:07:58,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-27 02:07:58,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:07:58,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:07:58,425 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 02:07:58,426 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 02:07:58,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-27 02:07:58,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:07:58,602 INFO L262 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 39 conjunts are in the unsatisfiable core [2023-08-27 02:07:58,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:07:58,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 02:07:58,807 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 02:07:58,920 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:07:58,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:07:59,034 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_794 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_794) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 12)))) is different from false [2023-08-27 02:07:59,043 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:07:59,043 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2023-08-27 02:07:59,053 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-27 02:07:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:07:59,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242633193] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:07:59,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:07:59,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-08-27 02:07:59,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622186780] [2023-08-27 02:07:59,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:07:59,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-27 02:07:59,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:07:59,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-27 02:07:59,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1160, Unknown=1, NotChecked=68, Total=1332 [2023-08-27 02:07:59,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 261 [2023-08-27 02:07:59,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 776 transitions, 15171 flow. Second operand has 37 states, 37 states have (on average 77.62162162162163) internal successors, (2872), 37 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:07:59,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:07:59,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 261 [2023-08-27 02:07:59,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:08:05,380 INFO L124 PetriNetUnfolderBase]: 10440/18630 cut-off events. [2023-08-27 02:08:05,380 INFO L125 PetriNetUnfolderBase]: For 214375/214375 co-relation queries the response was YES. [2023-08-27 02:08:05,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127105 conditions, 18630 events. 10440/18630 cut-off events. For 214375/214375 co-relation queries the response was YES. Maximal size of possible extension queue 1094. Compared 154419 event pairs, 654 based on Foata normal form. 2/18632 useless extension candidates. Maximal degree in co-relation 127004. Up to 11297 conditions per place. [2023-08-27 02:08:05,760 INFO L140 encePairwiseOnDemand]: 251/261 looper letters, 116 selfloop transitions, 949 changer transitions 85/1150 dead transitions. [2023-08-27 02:08:05,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 1150 transitions, 22918 flow [2023-08-27 02:08:05,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-27 02:08:05,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-27 02:08:05,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2742 transitions. [2023-08-27 02:08:05,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31835597352838735 [2023-08-27 02:08:05,764 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2742 transitions. [2023-08-27 02:08:05,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2742 transitions. [2023-08-27 02:08:05,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:08:05,765 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2742 transitions. [2023-08-27 02:08:05,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 83.0909090909091) internal successors, (2742), 33 states have internal predecessors, (2742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:08:05,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 261.0) internal successors, (8874), 34 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:08:05,773 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 261.0) internal successors, (8874), 34 states have internal predecessors, (8874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:08:05,773 INFO L175 Difference]: Start difference. First operand has 343 places, 776 transitions, 15171 flow. Second operand 33 states and 2742 transitions. [2023-08-27 02:08:05,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 1150 transitions, 22918 flow [2023-08-27 02:08:07,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 1150 transitions, 22416 flow, removed 165 selfloop flow, removed 20 redundant places. [2023-08-27 02:08:07,750 INFO L231 Difference]: Finished difference. Result has 359 places, 978 transitions, 21044 flow [2023-08-27 02:08:07,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=14754, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=776, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=747, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=21044, PETRI_PLACES=359, PETRI_TRANSITIONS=978} [2023-08-27 02:08:07,751 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 326 predicate places. [2023-08-27 02:08:07,751 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 978 transitions, 21044 flow [2023-08-27 02:08:07,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 77.62162162162163) internal successors, (2872), 37 states have internal predecessors, (2872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:08:07,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:08:07,751 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:08:07,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-27 02:08:07,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-27 02:08:07,952 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:08:07,952 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:08:07,952 INFO L85 PathProgramCache]: Analyzing trace with hash -455420422, now seen corresponding path program 13 times [2023-08-27 02:08:07,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:08:07,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310747784] [2023-08-27 02:08:07,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:08:07,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:08:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:08:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:08:08,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:08:08,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310747784] [2023-08-27 02:08:08,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310747784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:08:08,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820448071] [2023-08-27 02:08:08,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-27 02:08:08,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:08:08,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:08:08,085 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 02:08:08,110 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 02:08:08,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:08:08,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-27 02:08:08,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:08:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:08:08,281 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:08:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:08:08,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820448071] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:08:08,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:08:08,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2023-08-27 02:08:08,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332715437] [2023-08-27 02:08:08,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:08:08,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-27 02:08:08,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:08:08,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-27 02:08:08,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-27 02:08:08,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 261 [2023-08-27 02:08:08,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 978 transitions, 21044 flow. Second operand has 8 states, 8 states have (on average 105.75) internal successors, (846), 8 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:08:08,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:08:08,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 261 [2023-08-27 02:08:08,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:08:16,966 INFO L124 PetriNetUnfolderBase]: 14870/27197 cut-off events. [2023-08-27 02:08:16,966 INFO L125 PetriNetUnfolderBase]: For 423745/423745 co-relation queries the response was YES. [2023-08-27 02:08:17,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 225589 conditions, 27197 events. 14870/27197 cut-off events. For 423745/423745 co-relation queries the response was YES. Maximal size of possible extension queue 1628. Compared 247081 event pairs, 1993 based on Foata normal form. 24/27221 useless extension candidates. Maximal degree in co-relation 225486. Up to 16229 conditions per place. [2023-08-27 02:08:17,486 INFO L140 encePairwiseOnDemand]: 258/261 looper letters, 294 selfloop transitions, 1065 changer transitions 7/1366 dead transitions. [2023-08-27 02:08:17,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1366 transitions, 32739 flow [2023-08-27 02:08:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-27 02:08:17,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-27 02:08:17,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 784 transitions. [2023-08-27 02:08:17,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42911877394636017 [2023-08-27 02:08:17,488 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 784 transitions. [2023-08-27 02:08:17,488 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 784 transitions. [2023-08-27 02:08:17,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:08:17,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 784 transitions. [2023-08-27 02:08:17,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 112.0) internal successors, (784), 7 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:08:17,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:08:17,491 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 261.0) internal successors, (2088), 8 states have internal predecessors, (2088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:08:17,491 INFO L175 Difference]: Start difference. First operand has 359 places, 978 transitions, 21044 flow. Second operand 7 states and 784 transitions. [2023-08-27 02:08:17,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1366 transitions, 32739 flow [2023-08-27 02:08:20,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1366 transitions, 31214 flow, removed 415 selfloop flow, removed 13 redundant places. [2023-08-27 02:08:20,582 INFO L231 Difference]: Finished difference. Result has 354 places, 1315 transitions, 31134 flow [2023-08-27 02:08:20,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=19619, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=978, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=806, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=31134, PETRI_PLACES=354, PETRI_TRANSITIONS=1315} [2023-08-27 02:08:20,584 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 321 predicate places. [2023-08-27 02:08:20,584 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 1315 transitions, 31134 flow [2023-08-27 02:08:20,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 105.75) internal successors, (846), 8 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:08:20,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:08:20,584 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:08:20,589 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 02:08:20,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:08:20,789 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:08:20,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:08:20,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1637783044, now seen corresponding path program 14 times [2023-08-27 02:08:20,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:08:20,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941277600] [2023-08-27 02:08:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:08:20,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:08:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:08:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:08:21,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:08:21,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941277600] [2023-08-27 02:08:21,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941277600] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:08:21,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702973890] [2023-08-27 02:08:21,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-27 02:08:21,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:08:21,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:08:21,073 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 02:08:21,098 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 02:08:21,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-27 02:08:21,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:08:21,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-27 02:08:21,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:08:21,498 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:08:21,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:08:21,692 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:08:21,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702973890] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:08:21,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:08:21,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 32 [2023-08-27 02:08:21,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037434491] [2023-08-27 02:08:21,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:08:21,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-27 02:08:21,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:08:21,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-27 02:08:21,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=772, Unknown=0, NotChecked=0, Total=1056 [2023-08-27 02:08:21,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 261 [2023-08-27 02:08:21,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 1315 transitions, 31134 flow. Second operand has 33 states, 33 states have (on average 87.57575757575758) internal successors, (2890), 33 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:08:21,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:08:21,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 261 [2023-08-27 02:08:21,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:08:32,839 INFO L124 PetriNetUnfolderBase]: 15692/29434 cut-off events. [2023-08-27 02:08:32,840 INFO L125 PetriNetUnfolderBase]: For 545308/545308 co-relation queries the response was YES. [2023-08-27 02:08:33,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 246156 conditions, 29434 events. 15692/29434 cut-off events. For 545308/545308 co-relation queries the response was YES. Maximal size of possible extension queue 1598. Compared 281510 event pairs, 8874 based on Foata normal form. 324/29758 useless extension candidates. Maximal degree in co-relation 246052. Up to 26259 conditions per place. [2023-08-27 02:08:33,298 INFO L140 encePairwiseOnDemand]: 256/261 looper letters, 1310 selfloop transitions, 6 changer transitions 285/1601 dead transitions. [2023-08-27 02:08:33,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1601 transitions, 39174 flow [2023-08-27 02:08:33,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-27 02:08:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-27 02:08:33,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 2133 transitions. [2023-08-27 02:08:33,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3553223388305847 [2023-08-27 02:08:33,300 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 2133 transitions. [2023-08-27 02:08:33,300 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 2133 transitions. [2023-08-27 02:08:33,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:08:33,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 2133 transitions. [2023-08-27 02:08:33,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 92.73913043478261) internal successors, (2133), 23 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:08:33,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 261.0) internal successors, (6264), 24 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:08:33,305 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 261.0) internal successors, (6264), 24 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:08:33,305 INFO L175 Difference]: Start difference. First operand has 354 places, 1315 transitions, 31134 flow. Second operand 23 states and 2133 transitions. [2023-08-27 02:08:33,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1601 transitions, 39174 flow [2023-08-27 02:08:39,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 1601 transitions, 37756 flow, removed 703 selfloop flow, removed 1 redundant places. [2023-08-27 02:08:39,706 INFO L231 Difference]: Finished difference. Result has 392 places, 1316 transitions, 30206 flow [2023-08-27 02:08:39,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=29736, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=30206, PETRI_PLACES=392, PETRI_TRANSITIONS=1316} [2023-08-27 02:08:39,708 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 359 predicate places. [2023-08-27 02:08:39,708 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1316 transitions, 30206 flow [2023-08-27 02:08:39,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 87.57575757575758) internal successors, (2890), 33 states have internal predecessors, (2890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:08:39,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:08:39,708 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:08:39,717 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 02:08:39,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-27 02:08:39,915 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:08:39,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:08:39,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2068877378, now seen corresponding path program 15 times [2023-08-27 02:08:39,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:08:39,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461589108] [2023-08-27 02:08:39,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:08:39,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:08:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:08:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:08:40,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:08:40,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461589108] [2023-08-27 02:08:40,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461589108] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:08:40,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636519177] [2023-08-27 02:08:40,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-27 02:08:40,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:08:40,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:08:40,557 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 02:08:40,588 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 02:08:41,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-08-27 02:08:41,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:08:41,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-27 02:08:41,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:08:41,576 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-27 02:08:41,590 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:08:41,590 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 02:08:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:08:41,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:08:41,794 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-08-27 02:08:41,795 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 28 treesize of output 11 [2023-08-27 02:08:42,024 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-27 02:08:42,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636519177] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:08:42,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:08:42,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 41 [2023-08-27 02:08:42,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145804355] [2023-08-27 02:08:42,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:08:42,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-27 02:08:42,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:08:42,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-27 02:08:42,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1584, Unknown=0, NotChecked=0, Total=1806 [2023-08-27 02:08:42,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 261 [2023-08-27 02:08:42,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1316 transitions, 30206 flow. Second operand has 43 states, 43 states have (on average 74.6046511627907) internal successors, (3208), 43 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:08:42,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:08:42,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 261 [2023-08-27 02:08:42,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-27 02:10:01,469 INFO L124 PetriNetUnfolderBase]: 93797/173444 cut-off events. [2023-08-27 02:10:01,470 INFO L125 PetriNetUnfolderBase]: For 3455343/3455343 co-relation queries the response was YES. [2023-08-27 02:10:06,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1438859 conditions, 173444 events. 93797/173444 cut-off events. For 3455343/3455343 co-relation queries the response was YES. Maximal size of possible extension queue 7738. Compared 1973716 event pairs, 14254 based on Foata normal form. 161/173605 useless extension candidates. Maximal degree in co-relation 1438736. Up to 100637 conditions per place. [2023-08-27 02:10:06,627 INFO L140 encePairwiseOnDemand]: 254/261 looper letters, 3384 selfloop transitions, 6507 changer transitions 462/10353 dead transitions. [2023-08-27 02:10:06,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 591 places, 10353 transitions, 238400 flow [2023-08-27 02:10:06,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2023-08-27 02:10:06,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2023-08-27 02:10:06,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 17572 transitions. [2023-08-27 02:10:06,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3116929189726125 [2023-08-27 02:10:06,649 INFO L72 ComplementDD]: Start complementDD. Operand 216 states and 17572 transitions. [2023-08-27 02:10:06,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 216 states and 17572 transitions. [2023-08-27 02:10:06,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-27 02:10:06,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 216 states and 17572 transitions. [2023-08-27 02:10:06,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 217 states, 216 states have (on average 81.35185185185185) internal successors, (17572), 216 states have internal predecessors, (17572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:10:06,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 217 states, 217 states have (on average 261.0) internal successors, (56637), 217 states have internal predecessors, (56637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:10:06,728 INFO L81 ComplementDD]: Finished complementDD. Result has 217 states, 217 states have (on average 261.0) internal successors, (56637), 217 states have internal predecessors, (56637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:10:06,728 INFO L175 Difference]: Start difference. First operand has 392 places, 1316 transitions, 30206 flow. Second operand 216 states and 17572 transitions. [2023-08-27 02:10:06,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 591 places, 10353 transitions, 238400 flow [2023-08-27 02:11:34,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 570 places, 10353 transitions, 236740 flow, removed 825 selfloop flow, removed 21 redundant places. [2023-08-27 02:11:34,681 INFO L231 Difference]: Finished difference. Result has 651 places, 7504 transitions, 195223 flow [2023-08-27 02:11:34,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=29744, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=216, PETRI_FLOW=195223, PETRI_PLACES=651, PETRI_TRANSITIONS=7504} [2023-08-27 02:11:34,683 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 618 predicate places. [2023-08-27 02:11:34,683 INFO L495 AbstractCegarLoop]: Abstraction has has 651 places, 7504 transitions, 195223 flow [2023-08-27 02:11:34,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 74.6046511627907) internal successors, (3208), 43 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:11:34,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-27 02:11:34,684 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-27 02:11:34,693 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 02:11:34,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:11:34,890 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 26 more)] === [2023-08-27 02:11:34,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-27 02:11:34,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1593283454, now seen corresponding path program 16 times [2023-08-27 02:11:34,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-27 02:11:34,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562638954] [2023-08-27 02:11:34,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-27 02:11:34,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-27 02:11:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-27 02:11:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-27 02:11:35,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-27 02:11:35,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562638954] [2023-08-27 02:11:35,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562638954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-27 02:11:35,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981210970] [2023-08-27 02:11:35,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-27 02:11:35,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-27 02:11:35,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-27 02:11:35,642 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 02:11:35,646 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 02:11:35,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-27 02:11:35,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-27 02:11:35,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-27 02:11:35,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-27 02:11:36,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-27 02:11:36,046 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-27 02:11:36,199 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-27 02:11:36,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-27 02:11:36,362 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_971 (Array Int Int))) (= 5 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_971) c_~queue~0.base) (+ c_~queue~0.offset (* c_~front~0 4) 16)))) is different from false [2023-08-27 02:11:36,372 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-27 02:11:36,372 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 47 treesize of output 35 [2023-08-27 02:11:36,380 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 3 [2023-08-27 02:11:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-27 02:11:36,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981210970] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-27 02:11:36,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-27 02:11:36,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 13, 13] total 42 [2023-08-27 02:11:36,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982101633] [2023-08-27 02:11:36,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-27 02:11:36,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-27 02:11:36,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-27 02:11:36,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-27 02:11:36,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1685, Unknown=1, NotChecked=82, Total=1892 [2023-08-27 02:11:36,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 261 [2023-08-27 02:11:36,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 7504 transitions, 195223 flow. Second operand has 44 states, 44 states have (on average 77.52272727272727) internal successors, (3411), 44 states have internal predecessors, (3411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-27 02:11:36,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-27 02:11:36,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 261 [2023-08-27 02:11:36,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-27 02:19:11,202 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 02:19:11,214 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-27 02:19:12,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-27 02:19:12,226 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown